From nobody Thu Aug 1 05:40:34 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6DA29120114; Thu, 1 Aug 2019 05:40:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id e6c4r3iFyuQg; Thu, 1 Aug 2019 05:40:28 -0700 (PDT) Received: from mail-lj1-x235.google.com (mail-lj1-x235.google.com [IPv6:2a00:1450:4864:20::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1A69412008F; Thu, 1 Aug 2019 05:40:28 -0700 (PDT) Received: by mail-lj1-x235.google.com with SMTP id h10so69240432ljg.0; Thu, 01 Aug 2019 05:40:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Xko1YP3C+VO87j5kq6aacJQICERDz7YWY89PtaNgs98=; b=nM4/TjrqI50jipJ4Z30AP/l2zLEwVOZW5KzHCwAWahsVb0wMuPacvEm3jVrQ26D89E JZ9X3MDNLkP3/DOqMj7gGRdyuaYunZt6soahf/suhfbPtKZutMvFLieAAGHZNJanaNgR yJYU7PZ0STWKKz+v7Hxtbb39edqCvyPGuKxBVoIxoDjH8HbZGR6ZKTxUL7snH2Yu0EwN v0h9rBkuTRLcseGoV4/Lmni3WCndTzKUlQz2l1XJChquATp/XfU1/fTtudzeb2KXooZl CsjXnlZVYUwfX8YyrbHVkkULL7/n/2ne+zV4KCv+BAkmummxoWn+YK0s9C1xc8qLGL7k jRpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Xko1YP3C+VO87j5kq6aacJQICERDz7YWY89PtaNgs98=; b=mg8B3Ki8eyC2owDCn0IE/+Dz4tE7bBzDqPFC2Fz7jDcha8vJwDaWodFi++omXb/JM7 L+SyzBr/LmxEcs3gPyva/5i32yUQLB53dyd9cdPCHWrgG1mJMWsGTiKitqUsrUBE2IeN W52Fkyfe35H0R92HXBj/k5zp9pac7052YgDn97QcXLUeKdPIq1jmVr2lTSE8HPbh6PH5 gkqUtMGcgOcq1MYroB5zpbJ6XDkgKbJipdGh2aiAEIrubqXQ9PTRAvHo/sTKR5OYj/30 2JTXkw2lMfISwQB81fKwIxZhoJ0VGzHvcwI1ODdfNytlXP7TjFjh1+XhxwSRh/Hpheqq lQ0Q== X-Gm-Message-State: APjAAAVtw2vis3MF03F3N/yDNWGQGTZ+pBjVnZd7ifN/wm+8jxxdTciQ PdP8d0VbyEjqK9+lSKxbMYh+mY/qKiU5GKJCTkE= X-Google-Smtp-Source: APXvYqxVAE2Ew/U376zTJMIVJguTRuSMhmxSSNrE1PJP1xk4MDHdlzUa8TsK9vzeQ2CVmrfQUiN9whqqDEQdfDaHzPg= X-Received: by 2002:a2e:6c07:: with SMTP id h7mr665716ljc.177.1564663225985; Thu, 01 Aug 2019 05:40:25 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Thu, 1 Aug 2019 08:40:14 -0400 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: rtg-bfd WG , "T. Sridhar" , Joel Halpern , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000c7360f058f0d8b6b" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Aug 2019 12:40:33 -0000 --000000000000c7360f058f0d8b6b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Dinesh, as I understand, Sridhar is on vacation. In the meantime, this is his response to the question on using VTEP's MAC address as the destination MAC in the inner Ethernet frame: T. Sridhar Sun, Jun 30, 7:13 PM to Reshad, Martin, draft-ietf-bfd-vxlan@ietf.org, Matthew, Sam, Jeffrey Reshad, Sorry - could not respond earlier. Joel is right - the draft does impose a requirement on the inner MAC being the same as the VTEP MAC and eats into the tenant MAC space which is not a desirable approach. You *could* use VNI0 as the one only VNI to specify this but that's not ideal either since we did not impose any restriction on the VNI space. Btw, I also think I should modify the comment I had made below about using the inner IP to be the same as the VTEP IP since there is no guarantee that the inner MAC frame is an IP packet. Thanks, Sridhar =EF=BB=BFOn 6/26/19, 6:59 PM, "Reshad Rahman (rrahman)" = wrote: Thank you Sridhar. One concern which came up is wrt the use of the destination VTEP MAC address as dest MAC in the inner IP header (see attached email). Could you please comment on that aspect? Regards, Reshad. I understand that RFC 7348 maybe is not clear on that issue. I'd like to understand how the existing implementations behave, process VXLAN header and the inner Ethernet frame to minimize changes BFD over VXLAN may impose on the implementation. Regards, Greg On Thu, Aug 1, 2019 at 12:48 AM Dinesh Dutt wrote: > I don't understand his objection. My recommendation is to understand that > before we propose new text. I fear otherwise that we'll have a new draft = in > a few months to address the issue of using non-mgmt VNI. > > Dinesh > On Jul 31, 2019, 12:07 PM -0700, Greg Mirsky , > wrote: > > Hi Dinesh, > if I recall correctly, T.Sridhar has noted that VTEP's MAC must not be > used as the destination MAC address in the inner Ethernet frame. > > > > Also, I should have been more precise in the proposed text, please see th= e > updated version to stress that the management VNI MUST NOT be one of the > tenant's VNIs: > NEW TEXT: > > An operator MUST select a VNI number to be used as Management VNI. > Management VNI number MUST NOT be one of the tenant's VNIs to prevent > sending VXLAN packets received on Management VNI to a tenant. VNI number = 1 > is RECOMMENDED as the default for Management VNI. > > > On Wed, Jul 31, 2019 at 2:25 PM Dinesh Dutt wrote: > >> Hi Greg, >> >> On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky >> wrote: >> >>> Hi Dinesh, >>> thank you for your consideration of the proposal and questions. What >>> would you see as the scope of testing the connectivity for the specific >>> VNI? If it is tenant-to-tenant, then VTEPs will treat these packets as >>> regular user frames. More likely, these could be Layer 2 OAM, e.g. CCM >>> frames. The reason to use 127/8 for IPv4, and 0:0:0:0:0:FFFF:7F00:0/104= for >>> IPv6 is to safeguard from leaking Ethernet frames with BFD Control pack= et >>> to a tenant. >>> You've suggested using a MAC address to trap the control packet at VTEP= . >>> What that address could be? We had proposed using the dedicated MAC and >>> VTEP's MAC and both raised concerns among VXLAN experts. The idea of us= ing >>> Management VNI may be more acceptable based on its similarity to the >>> practice of using Management VLAN. >>> >> >> If you use the inner IP address as the VTEP IP address, then use the MAC >> address that the VTEP would respond with when replying to an ARP for tha= t >> VTEP IP address. If a VXLAN expert disagrees with this, could you kindly >> tell me who it is so that I can understand their disagreement? So this >> handles the case where the VNI is not a user-tenant VNI. If the VNI used= in >> the BFD packet is a user-tenant VNI, then the receiving VTEP MUST have a= n >> IP address in that VNI (mapped to a VRF) else you cannot use that VNI in >> the BFD packet. Why won't this combination address all the cases you've >> listed? What am I missing? Define VNI 1 as a possible use, not VNI 0. I >> objected to VNI 0 because there are too many switching siicon out there = and >> some of them will not be able to handle this scenario. >> >> Dinesh >> >>> >>> Regards, >>> Greg >>> >>> On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt wrote: >>> >>>> Hi Greg, >>>> >>>> As long as the inner MAC address is such that the packet is trapped to >>>> the CPU, it should be fine for use as an inner MAC is it not? Stating = that >>>> is better than trying to force a management VNI. What if someone wants= to >>>> test connectivity on a specific VNI? I would not pick a loopback IP ad= dress >>>> for this since that address range is host/node local only. Is there a >>>> reason you're not using the VTEP IP as the inner IP address ? >>>> >>>> Dinesh >>>> >>>> On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky >>>> wrote: >>>> >>>>> Dear All, >>>>> thank you for your comments, suggestions on this issue, probably the >>>>> most challenging for this specification. In the course of our discuss= ions, >>>>> we've agreed to abandon the request to allocate the dedicated MAC add= ress >>>>> to be used as the destination MAC address in the inner Ethernet frame= . >>>>> Also, earlier using VNI 0 was changed from mandatory to one of the op= tions >>>>> an implementation may offer to an operator. The most recent discussio= n was >>>>> whether VTEP's MAC address might be used as the destination MAC addre= ss in >>>>> the inner Ethernet frame. As I recall it, the comments from VXLAN exp= erts >>>>> equally split with one for it and one against. Hence I would like to >>>>> propose a new text to resolve the issue. The idea is to let an operat= or >>>>> select Management VNI and use that VNI in VXLAN encapsulation of BFD >>>>> Control packets: >>>>> NEW TEXT: >>>>> >>>>> An operator MUST select a VNI number to be used as Management VNI. >>>>> VXLAN packet for Management VNI MUST NOT be sent to a tenant. VNI num= ber 1 >>>>> is RECOMMENDED as the default for Management VNI. >>>>> >>>>> With that new text, what can be the value of the destination MAC in >>>>> the inner Ethernet? I tend to believe that it can be anything and ign= ored >>>>> by the reciever VTEP. Also, if the trapping is based on VNI number, t= he >>>>> destination IP address of the inner IP packet can from the range 127/= 8 for >>>>> IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. And last= ly, >>>>> the TTL to be set to 1 (no change here). >>>>> >>>>> Much appreciate your comments, questions, and suggestions. >>>>> >>>>> Best regards, >>>>> Greg >>>>> >>>> --000000000000c7360f058f0d8b6b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Dinesh,
as I understand, Sridhar is on vacation. In= the meantime, this is his response to the question on using VTEP's MAC= address as the destination MAC in the inner Ethernet frame:

=

=
=

T. Sridhar

Sun, Jun 30, 7:13 = PM
=
3D""
3D""
to=C2=A0Reshad,=C2=A0Martin,=C2=A0draft-ietf-bfd-vxlan@ietf.org= ,=C2=A0Matthew,=C2=A0Sam,=C2=A0J= effrey
3D""
Reshad,

Sorry - could not respond earlier.=C2=A0

Joe= l is right - the draft does impose a requirement on the inner MAC being the= same as the VTEP MAC and eats into the tenant MAC space which is not a des= irable approach. You *could* use VNI0 as the one only VNI to specify this b= ut that's not ideal either since we did not impose any restriction on t= he VNI space.=C2=A0

Btw,=C2=A0 I also think I should modify the comm= ent I had made below about using the inner IP to be the same as the VTEP IP= since there is no guarantee that the inner MAC frame is an IP packet.=C2= =A0

Thanks,
Sridhar



=EF=BB=BFOn 6/2= 6/19, 6:59 PM, "Reshad Rahman (rrahman)" <rrahman@cisco.com> wrote:

= =C2=A0 =C2=A0 Thank you Sridhar. One concern which came up is wrt the use o= f the destination VTEP MAC address as dest MAC in the inner IP header (see = attached email). Could you please comment on that aspect?

=C2=A0 =C2= =A0 Regards,
=C2=A0 =C2=A0 Reshad.

I understand that RFC 7348 maybe is not clear on that issue.= I'd like to understand how the existing implementations behave, proces= s VXLAN header and the inner Ethernet frame to minimize changes BFD over VX= LAN may impose on the implementation.

Regards,
Greg


On Thu, Aug 1, 2019 at 12= :48 AM Dinesh Dutt <didutt@gmail.com= > wrote:
=
I don't understand his objection. My recommendation is= to understand that before we propose new text. I fear otherwise that we= 9;ll have a new draft in a few months to address the issue of using non-mgm= t VNI.

Dinesh
On Jul 31, 2019, 12:07 PM -0700, Greg Mir= sky <gregimir= sky@gmail.com>, wrote:
Hi Dinesh,
if I recall=C2=A0correctly, T.Sridhar has noted that VTEP's MAC mu= st not be used as the destination MAC address in the inner Ethernet frame.= =C2=A0



Also, I should have been more precise in the proposed text, please see= the updated version to stress that the management VNI MUST NOT be one of t= he tenant's VNIs:
NEW TEXT:
An operator MUST select a VNI number to be used as Management VNI. Man= agement VNI number MUST NOT be one of the tenant's VNIs to prevent send= ing VXLAN packets received on Management VNI to a tenant. VNI number 1 is R= ECOMMENDED as the default for Management VNI.=C2=A0=C2=A0

On Wed, Jul 31, 2019 at 2:25 PM Dines= h Dutt <didutt@gma= il.com> wrote:
Hi Greg,

On Wed, Jul 31, 2019 at 9:20 AM Greg = Mirsky <gregi= mirsky@gmail.com> wrote:
Hi Dinesh,
thank you for your consideration of the proposal and questions. What w= ould you see as the scope of testing the connectivity for the specific VNI?= If it is tenant-to-tenant, then VTEPs will treat these packets as regular = user frames. More likely, these could be Layer 2 OAM, e.g. CCM frames. The = reason to use 127/8 for IPv4, and 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to = safeguard from leaking Ethernet frames with BFD Control packet to a tenant.=
You've suggested using a MAC address to trap the control packet at= VTEP. What that address could be? We had proposed using the dedicated MAC = and VTEP's MAC and both raised concerns among VXLAN experts. The idea o= f using Management VNI may be more acceptable based on its similarity to th= e practice of using Management VLAN.

If you use the inner IP address as the VTEP IP address, then use the M= AC address that the VTEP would respond with when replying to an ARP for tha= t VTEP IP address. If a VXLAN expert disagrees with this, could you kindly = tell me who it is so that I can understand their disagreement? So this hand= les the case where the VNI is not a user-tenant VNI. If the VNI used in the= BFD packet is a user-tenant VNI, then the receiving VTEP MUST have an IP a= ddress in that VNI (mapped to a VRF) else you cannot use that VNI in the BF= D packet. Why won't this combination address all the cases you've l= isted? What am I missing? Define VNI 1 as a possible use, not VNI 0. I obje= cted to VNI 0 because there are too many switching siicon out there and som= e of them will not be able to handle this scenario.

Dinesh

Regards,
Greg

On Wed, Jul 31, 2019 at 12:03 PM Dine= sh Dutt <didutt@gm= ail.com> wrote:
Hi Greg,

As long as the inner MAC address is such that the packet is trapped to= the CPU, it should be fine for use as an inner MAC is it not? Stating that= is better than trying to force a management VNI. What if someone wants to = test connectivity on a specific VNI? I would not pick a loopback IP address= for this since that address range is host/node local only. Is there a reas= on you're not using the VTEP IP as the inner IP address ?

Dinesh

On Wed, Jul 31, 2019 at 5:48 AM Greg = Mirsky <gregi= mirsky@gmail.com> wrote:
Dear All,
thank you for your comments, suggestions on this issue, probably the m= ost challenging for this specification. In the course of our discussions, w= e've agreed to abandon the request to allocate the dedicated MAC addres= s to be used as the destination MAC address in the inner Ethernet frame. Al= so, earlier using VNI 0 was changed from mandatory to one of the options an= implementation may offer to an operator. The most recent discussion was wh= ether VTEP's MAC address might be used as the destination MAC address i= n the inner Ethernet frame. As I recall it, the comments from VXLAN experts= equally split with one for it and one against. Hence I would like to propo= se a new text to resolve the issue. The idea is to let an operator select M= anagement VNI and use that VNI in VXLAN encapsulation of BFD Control packet= s:
NEW TEXT:
, Joel Halpern , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="0000000000005efede058f06f593" Archived-At: X-Mailman-Approved-At: Thu, 01 Aug 2019 08:34:44 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Aug 2019 04:48:57 -0000 --0000000000005efede058f06f593 Content-Type: text/plain; charset="UTF-8" I don't understand his objection. My recommendation is to understand that before we propose new text. I fear otherwise that we'll have a new draft in a few months to address the issue of using non-mgmt VNI. Dinesh On Jul 31, 2019, 12:07 PM -0700, Greg Mirsky , wrote: Hi Dinesh, if I recall correctly, T.Sridhar has noted that VTEP's MAC must not be used as the destination MAC address in the inner Ethernet frame. Also, I should have been more precise in the proposed text, please see the updated version to stress that the management VNI MUST NOT be one of the tenant's VNIs: NEW TEXT: An operator MUST select a VNI number to be used as Management VNI. Management VNI number MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the default for Management VNI. On Wed, Jul 31, 2019 at 2:25 PM Dinesh Dutt wrote: > Hi Greg, > > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky wrote: > >> Hi Dinesh, >> thank you for your consideration of the proposal and questions. What >> would you see as the scope of testing the connectivity for the specific >> VNI? If it is tenant-to-tenant, then VTEPs will treat these packets as >> regular user frames. More likely, these could be Layer 2 OAM, e.g. CCM >> frames. The reason to use 127/8 for IPv4, and 0:0:0:0:0:FFFF:7F00:0/104 for >> IPv6 is to safeguard from leaking Ethernet frames with BFD Control packet >> to a tenant. >> You've suggested using a MAC address to trap the control packet at VTEP. >> What that address could be? We had proposed using the dedicated MAC and >> VTEP's MAC and both raised concerns among VXLAN experts. The idea of using >> Management VNI may be more acceptable based on its similarity to the >> practice of using Management VLAN. >> > > If you use the inner IP address as the VTEP IP address, then use the MAC > address that the VTEP would respond with when replying to an ARP for that > VTEP IP address. If a VXLAN expert disagrees with this, could you kindly > tell me who it is so that I can understand their disagreement? So this > handles the case where the VNI is not a user-tenant VNI. If the VNI used in > the BFD packet is a user-tenant VNI, then the receiving VTEP MUST have an > IP address in that VNI (mapped to a VRF) else you cannot use that VNI in > the BFD packet. Why won't this combination address all the cases you've > listed? What am I missing? Define VNI 1 as a possible use, not VNI 0. I > objected to VNI 0 because there are too many switching siicon out there and > some of them will not be able to handle this scenario. > > Dinesh > >> >> Regards, >> Greg >> >> On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt wrote: >> >>> Hi Greg, >>> >>> As long as the inner MAC address is such that the packet is trapped to >>> the CPU, it should be fine for use as an inner MAC is it not? Stating that >>> is better than trying to force a management VNI. What if someone wants to >>> test connectivity on a specific VNI? I would not pick a loopback IP address >>> for this since that address range is host/node local only. Is there a >>> reason you're not using the VTEP IP as the inner IP address ? >>> >>> Dinesh >>> >>> On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky >>> wrote: >>> >>>> Dear All, >>>> thank you for your comments, suggestions on this issue, probably the >>>> most challenging for this specification. In the course of our discussions, >>>> we've agreed to abandon the request to allocate the dedicated MAC address >>>> to be used as the destination MAC address in the inner Ethernet frame. >>>> Also, earlier using VNI 0 was changed from mandatory to one of the options >>>> an implementation may offer to an operator. The most recent discussion was >>>> whether VTEP's MAC address might be used as the destination MAC address in >>>> the inner Ethernet frame. As I recall it, the comments from VXLAN experts >>>> equally split with one for it and one against. Hence I would like to >>>> propose a new text to resolve the issue. The idea is to let an operator >>>> select Management VNI and use that VNI in VXLAN encapsulation of BFD >>>> Control packets: >>>> NEW TEXT: >>>> >>>> An operator MUST select a VNI number to be used as Management VNI. >>>> VXLAN packet for Management VNI MUST NOT be sent to a tenant. VNI number 1 >>>> is RECOMMENDED as the default for Management VNI. >>>> >>>> With that new text, what can be the value of the destination MAC in the >>>> inner Ethernet? I tend to believe that it can be anything and ignored by >>>> the reciever VTEP. Also, if the trapping is based on VNI number, the >>>> destination IP address of the inner IP packet can from the range 127/8 for >>>> IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. And lastly, >>>> the TTL to be set to 1 (no change here). >>>> >>>> Much appreciate your comments, questions, and suggestions. >>>> >>>> Best regards, >>>> Greg >>>> >>> --0000000000005efede058f06f593 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I don't understand his objection. My recommendation is= to understand that before we propose new text. I fear otherwise that we= 9;ll have a new draft in a few months to address the issue of using non-mgm= t VNI.

Dinesh
On Jul 31, 2019, 12:07 PM -0700, Greg Mir= sky <gregimir= sky@gmail.com>, wrote:
Hi Dinesh,
if I recall=C2=A0correctly, T.Sridhar has noted that VTEP's MAC mu= st not be used as the destination MAC address in the inner Ethernet frame.= =C2=A0



Also, I should have been more precise in the proposed text, please see= the updated version to stress that the management VNI MUST NOT be one of t= he tenant's VNIs:
NEW TEXT:
An operator MUST select a VNI number to be used as Management VNI. Man= agement VNI number MUST NOT be one of the tenant's VNIs to prevent send= ing VXLAN packets received on Management VNI to a tenant. VNI number 1 is R= ECOMMENDED as the default for Management VNI.=C2=A0=C2=A0

On Wed, Jul 31, 2019 at 2:25 PM Dines= h Dutt <didutt@gma= il.com> wrote:
Hi Greg,

On Wed, Jul 31, 2019 at 9:20 AM Greg = Mirsky <gregi= mirsky@gmail.com> wrote:
Hi Dinesh,
thank you for your consideration of the proposal and questions. What w= ould you see as the scope of testing the connectivity for the specific VNI?= If it is tenant-to-tenant, then VTEPs will treat these packets as regular = user frames. More likely, these could be Layer 2 OAM, e.g. CCM frames. The = reason to use 127/8 for IPv4, and 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to = safeguard from leaking Ethernet frames with BFD Control packet to a tenant.=
You've suggested using a MAC address to trap the control packet at= VTEP. What that address could be? We had proposed using the dedicated MAC = and VTEP's MAC and both raised concerns among VXLAN experts. The idea o= f using Management VNI may be more acceptable based on its similarity to th= e practice of using Management VLAN.

If you use the inner IP address as the VTEP IP address, then use the M= AC address that the VTEP would respond with when replying to an ARP for tha= t VTEP IP address. If a VXLAN expert disagrees with this, could you kindly = tell me who it is so that I can understand their disagreement? So this hand= les the case where the VNI is not a user-tenant VNI. If the VNI used in the= BFD packet is a user-tenant VNI, then the receiving VTEP MUST have an IP a= ddress in that VNI (mapped to a VRF) else you cannot use that VNI in the BF= D packet. Why won't this combination address all the cases you've l= isted? What am I missing? Define VNI 1 as a possible use, not VNI 0. I obje= cted to VNI 0 because there are too many switching siicon out there and som= e of them will not be able to handle this scenario.

Dinesh

Regards,
Greg

On Wed, Jul 31, 2019 at 12:03 PM Dine= sh Dutt <didutt@gm= ail.com> wrote:
Hi Greg,

As long as the inner MAC address is such that the packet is trapped to= the CPU, it should be fine for use as an inner MAC is it not? Stating that= is better than trying to force a management VNI. What if someone wants to = test connectivity on a specific VNI? I would not pick a loopback IP address= for this since that address range is host/node local only. Is there a reas= on you're not using the VTEP IP as the inner IP address ?

Dinesh

On Wed, Jul 31, 2019 at 5:48 AM Greg = Mirsky <gregi= mirsky@gmail.com> wrote:
Dear All,
thank you for your comments, suggestions on this issue, probably the m= ost challenging for this specification. In the course of our discussions, w= e've agreed to abandon the request to allocate the dedicated MAC addres= s to be used as the destination MAC address in the inner Ethernet frame. Al= so, earlier using VNI 0 was changed from mandatory to one of the options an= implementation may offer to an operator. The most recent discussion was wh= ether VTEP's MAC address might be used as the destination MAC address i= n the inner Ethernet frame. As I recall it, the comments from VXLAN experts= equally split with one for it and one against. Hence I would like to propo= se a new text to resolve the issue. The idea is to let an operator select M= anagement VNI and use that VNI in VXLAN encapsulation of BFD Control packet= s:
NEW TEXT:
, Joel Halpern , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000829884058f10cf1e" Archived-At: X-Mailman-Approved-At: Thu, 01 Aug 2019 09:35:34 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Aug 2019 16:34:13 -0000 --000000000000829884058f10cf1e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I understand his point now. It arose in my head because of a difference in perspective. On a hardware switch, pretty much every implementation I've seen reuses one of the device's MAC address across all the local VNIs. Even in VMW's case, Even on a server, NIC's MAC address is by default reused across all VNIs. It seems some software switches have taken liberties with this. Given this information, if we want to ensure any proposal we come up with will work with existing packet switching silicon and software switch implementation, I also would prefer not to define something that'll be overridden or worked around soon enough by a new draft. With these assumptions, I see the problem definition as: - checking VTEP-to-VTEP connectivity in the overlay. Checking VTEP-to-VTEP connectivity in the underlay is a multi-hop BFD scenario. - I suspect whoever wants to check connectivity in the overlay will also want to check the connectivity in a specific VNI(s), Otherwise why are t= hey checking this in the overlay? There maybe existing mechanisms such as IE= EE OAM frames to check overlay in a specific VNI, but given my past experience, I suspect people will want a single unified mechanism using VXLAN (at least I see this in the data center use case). I believe you;ve implicitly excluded the case of bullet 2 currently. I'm not in favor of that for the reasons I stated above. I see the primary solution principles as: - BFD packet addressed to the VTEP MUST not leak beyond the VTEP.. - BFD packets exchanged between endpoints behind VTEPs MUST work as well. So, on the critical question of how do we address the VTEP, I see we have three possibilities: - Pick a MAC/IP pair that belongs to the VTEP in the VNI that you wish to send the packet in. These three parameters MUST be configurable: {VNI= , MAC, IP}. The default VNI for this can be VNI 1. - Pick a management VNI and use that VNI to trap control packets to the CPU. I don't like this option because we're burning a VNI for just this purpose. - Pick a well-defined MAC/IP for a given VNI. This is the solution that tries to use the 127/8 address for example. But this is a Martian packet= , is it not? I don't like it for this reason. Does this make sense? Dinesh On Thu, Aug 1, 2019 at 5:40 AM Greg Mirsky wrote: > Hi Dinesh, > as I understand, Sridhar is on vacation. In the meantime, this is his > response to the question on using VTEP's MAC address as the destination M= AC > in the inner Ethernet frame: > > > T. Sridhar > Sun, Jun 30, 7:13 PM > to Reshad, Martin, draft-ietf-bfd-vxlan@ietf.org, Matthew, Sam, Jeffrey > Reshad, > > Sorry - could not respond earlier. > > Joel is right - the draft does impose a requirement on the inner MAC bein= g > the same as the VTEP MAC and eats into the tenant MAC space which is not = a > desirable approach. You *could* use VNI0 as the one only VNI to specify > this but that's not ideal either since we did not impose any restriction = on > the VNI space. > > Btw, I also think I should modify the comment I had made below about > using the inner IP to be the same as the VTEP IP since there is no > guarantee that the inner MAC frame is an IP packet. > > Thanks, > Sridhar > > > > =EF=BB=BFOn 6/26/19, 6:59 PM, "Reshad Rahman (rrahman)" wrote: > > Thank you Sridhar. One concern which came up is wrt the use of the > destination VTEP MAC address as dest MAC in the inner IP header (see > attached email). Could you please comment on that aspect? > > Regards, > Reshad. > > I understand that RFC 7348 maybe is not clear on that issue. I'd like to > understand how the existing implementations behave, process VXLAN header > and the inner Ethernet frame to minimize changes BFD over VXLAN may impos= e > on the implementation. > > Regards, > Greg > > > On Thu, Aug 1, 2019 at 12:48 AM Dinesh Dutt wrote: > >> I don't understand his objection. My recommendation is to understand tha= t >> before we propose new text. I fear otherwise that we'll have a new draft= in >> a few months to address the issue of using non-mgmt VNI. >> >> Dinesh >> On Jul 31, 2019, 12:07 PM -0700, Greg Mirsky , >> wrote: >> >> Hi Dinesh, >> if I recall correctly, T.Sridhar has noted that VTEP's MAC must not be >> used as the destination MAC address in the inner Ethernet frame. >> >> >> >> Also, I should have been more precise in the proposed text, please see >> the updated version to stress that the management VNI MUST NOT be one of >> the tenant's VNIs: >> NEW TEXT: >> >> An operator MUST select a VNI number to be used as Management VNI. >> Management VNI number MUST NOT be one of the tenant's VNIs to prevent >> sending VXLAN packets received on Management VNI to a tenant. VNI number= 1 >> is RECOMMENDED as the default for Management VNI. >> >> >> On Wed, Jul 31, 2019 at 2:25 PM Dinesh Dutt wrote: >> >>> Hi Greg, >>> >>> On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky >>> wrote: >>> >>>> Hi Dinesh, >>>> thank you for your consideration of the proposal and questions. What >>>> would you see as the scope of testing the connectivity for the specifi= c >>>> VNI? If it is tenant-to-tenant, then VTEPs will treat these packets as >>>> regular user frames. More likely, these could be Layer 2 OAM, e.g. CCM >>>> frames. The reason to use 127/8 for IPv4, and 0:0:0:0:0:FFFF:7F00:0/10= 4 for >>>> IPv6 is to safeguard from leaking Ethernet frames with BFD Control pac= ket >>>> to a tenant. >>>> You've suggested using a MAC address to trap the control packet at >>>> VTEP. What that address could be? We had proposed using the dedicated = MAC >>>> and VTEP's MAC and both raised concerns among VXLAN experts. The idea = of >>>> using Management VNI may be more acceptable based on its similarity to= the >>>> practice of using Management VLAN. >>>> >>> >>> If you use the inner IP address as the VTEP IP address, then use the MA= C >>> address that the VTEP would respond with when replying to an ARP for th= at >>> VTEP IP address. If a VXLAN expert disagrees with this, could you kindl= y >>> tell me who it is so that I can understand their disagreement? So this >>> handles the case where the VNI is not a user-tenant VNI. If the VNI use= d in >>> the BFD packet is a user-tenant VNI, then the receiving VTEP MUST have = an >>> IP address in that VNI (mapped to a VRF) else you cannot use that VNI i= n >>> the BFD packet. Why won't this combination address all the cases you've >>> listed? What am I missing? Define VNI 1 as a possible use, not VNI 0. I >>> objected to VNI 0 because there are too many switching siicon out there= and >>> some of them will not be able to handle this scenario. >>> >>> Dinesh >>> >>>> >>>> Regards, >>>> Greg >>>> >>>> On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt wrote: >>>> >>>>> Hi Greg, >>>>> >>>>> As long as the inner MAC address is such that the packet is trapped t= o >>>>> the CPU, it should be fine for use as an inner MAC is it not? Stating= that >>>>> is better than trying to force a management VNI. What if someone want= s to >>>>> test connectivity on a specific VNI? I would not pick a loopback IP a= ddress >>>>> for this since that address range is host/node local only. Is there a >>>>> reason you're not using the VTEP IP as the inner IP address ? >>>>> >>>>> Dinesh >>>>> >>>>> On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky >>>>> wrote: >>>>> >>>>>> Dear All, >>>>>> thank you for your comments, suggestions on this issue, probably the >>>>>> most challenging for this specification. In the course of our discus= sions, >>>>>> we've agreed to abandon the request to allocate the dedicated MAC ad= dress >>>>>> to be used as the destination MAC address in the inner Ethernet fram= e. >>>>>> Also, earlier using VNI 0 was changed from mandatory to one of the o= ptions >>>>>> an implementation may offer to an operator. The most recent discussi= on was >>>>>> whether VTEP's MAC address might be used as the destination MAC addr= ess in >>>>>> the inner Ethernet frame. As I recall it, the comments from VXLAN ex= perts >>>>>> equally split with one for it and one against. Hence I would like to >>>>>> propose a new text to resolve the issue. The idea is to let an opera= tor >>>>>> select Management VNI and use that VNI in VXLAN encapsulation of BFD >>>>>> Control packets: >>>>>> NEW TEXT: >>>>>> >>>>>> An operator MUST select a VNI number to be used as Management VNI. >>>>>> VXLAN packet for Management VNI MUST NOT be sent to a tenant. VNI nu= mber 1 >>>>>> is RECOMMENDED as the default for Management VNI. >>>>>> >>>>>> With that new text, what can be the value of the destination MAC in >>>>>> the inner Ethernet? I tend to believe that it can be anything and ig= nored >>>>>> by the reciever VTEP. Also, if the trapping is based on VNI number, = the >>>>>> destination IP address of the inner IP packet can from the range 127= /8 for >>>>>> IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. And las= tly, >>>>>> the TTL to be set to 1 (no change here). >>>>>> >>>>>> Much appreciate your comments, questions, and suggestions. >>>>>> >>>>>> Best regards, >>>>>> Greg >>>>>> >>>>> --000000000000829884058f10cf1e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I understand his point now. It arose in my head becau= se of a difference in perspective. On a hardware switch, pretty much every = implementation I've seen reuses one of the device's MAC address acr= oss all the local VNIs. Even in VMW's case, Even on a server, NIC's= MAC address is by default reused across all VNIs. It seems some software s= witches have taken liberties with this.=C2=A0

= Given this information, if we want to ensure any proposal we come up with w= ill work with existing packet switching silicon and software switch impleme= ntation,=C2=A0 I also would prefer not to define something that'll be o= verridden or worked around soon enough by a new draft. With these assumptio= ns, I see the problem definition as:
  • checking VTEP-to-VT= EP connectivity in the overlay. Checking VTEP-to-VTEP connectivity in the u= nderlay is a multi-hop BFD scenario.
  • I suspect whoever wants t= o check connectivity in the overlay will also want to check the connectivit= y in a specific VNI(s), Otherwise why are they checking this in the overlay= ? There maybe existing mechanisms such as IEEE OAM frames to check overlay = in a specific VNI, but given my past experience, I suspect people will want= a single unified mechanism using VXLAN (at least I see this in the data ce= nter use case).
I believe you;ve implicitly excluded the case= of bullet 2 currently. I'm not in favor of that for the reasons I stat= ed above.

I see the primary solution principl= es as:
  • BFD packet addressed to the VTEP MUST not leak bey= ond the VTEP..
  • BFD packets exchanged between endpoints behind = VTEPs MUST work as well.
So, on the critical question = of how do we address the VTEP, I see we have three possibilities:
  • Pick a MAC/IP pair that belongs to the VTEP in the VNI that you wi= sh to send the packet in. These three parameters MUST be configurable: {VNI= , MAC, IP}. The default VNI for this can be VNI 1.
  • Pick a mana= gement VNI and use that VNI to trap control packets to the CPU. I don't= like this option because we're burning a VNI for just this purpose.
  • Pick a well-defined MAC/IP for a given VNI. This is the solution that= tries to use the 127/8 address for example. But this is a Martian packet, = is it not? I don't like it for this reason.
Does this mak= e sense?

Dinesh

On Thu, Aug 1,= 2019 at 5:40 AM Greg Mirsky <g= regimirsky@gmail.com> wrote:
Hi Dinesh,
as I understand, Sridha= r is on vacation. In the meantime, this is his response to the question on = using VTEP's MAC address as the destination MAC in the inner Ethernet f= rame:


T. Sridhar=

Sun, Jun 30, 7:13 PM
3D""
3D""
to=C2=A0Reshad,=C2=A0Martin,=C2=A0draft-ietf-bfd-vxlan@ietf.org,=C2=A0Matthew,=C2=A0Sam,= =C2=A0Jeffrey
3D""
Reshad,

Sorry - could not respond earl= ier.=C2=A0

Joel is right - the draft does impose a requirement on th= e inner MAC being the same as the VTEP MAC and eats into the tenant MAC spa= ce which is not a desirable approach. You *could* use VNI0 as the one only = VNI to specify this but that's not ideal either since we did not impose= any restriction on the VNI space.=C2=A0

Btw,=C2=A0 I also think I s= hould modify the comment I had made below about using the inner IP to be th= e same as the VTEP IP since there is no guarantee that the inner MAC frame = is an IP packet.=C2=A0

Thanks,
Sridhar



= =EF=BB=BFOn 6/26/19, 6:59 PM, "Reshad Rahman (rrahman)" <rrahman@cisco.com>= wrote:

=C2=A0 =C2=A0 Thank you Sridhar. One concern which came up i= s wrt the use of the destination VTEP MAC address as dest MAC in the inner = IP header (see attached email). Could you please comment on that aspect?
=C2=A0 =C2=A0 Regards,
=C2=A0 =C2=A0 Reshad.

=
I understand that RFC 7348 maybe is not clear on that issue. I&= #39;d like to understand how the existing implementations behave, process V= XLAN header and the inner Ethernet frame to minimize changes BFD over VXLAN= may impose on the implementation.

Regards,
Greg


On Thu, Aug 1, 2019= at 12:48 AM Dinesh Dutt <didutt@gmail.com> wrote:
I don't understand his objection. My recommendation is= to understand that before we propose new text. I fear otherwise that we= 9;ll have a new draft in a few months to address the issue of using non-mgm= t VNI.

Dinesh
On Jul 31, 2019, 12:07 PM -0700, Greg Mir= sky <gregimir= sky@gmail.com>, wrote:
Hi Dinesh,
if I recall=C2=A0correctly, T.Sridhar has noted that VTEP's MAC mu= st not be used as the destination MAC address in the inner Ethernet frame.= =C2=A0



Also, I should have been more precise in the proposed text, please see= the updated version to stress that the management VNI MUST NOT be one of t= he tenant's VNIs:
NEW TEXT:
An operator MUST select a VNI number to be used as Management VNI. Man= agement VNI number MUST NOT be one of the tenant's VNIs to prevent send= ing VXLAN packets received on Management VNI to a tenant. VNI number 1 is R= ECOMMENDED as the default for Management VNI.=C2=A0=C2=A0

On Wed, Jul 31, 2019 at 2:25 PM Dines= h Dutt <didutt@gma= il.com> wrote:
Hi Greg,

On Wed, Jul 31, 2019 at 9:20 AM Greg = Mirsky <gregi= mirsky@gmail.com> wrote:
Hi Dinesh,
thank you for your consideration of the proposal and questions. What w= ould you see as the scope of testing the connectivity for the specific VNI?= If it is tenant-to-tenant, then VTEPs will treat these packets as regular = user frames. More likely, these could be Layer 2 OAM, e.g. CCM frames. The = reason to use 127/8 for IPv4, and 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to = safeguard from leaking Ethernet frames with BFD Control packet to a tenant.=
You've suggested using a MAC address to trap the control packet at= VTEP. What that address could be? We had proposed using the dedicated MAC = and VTEP's MAC and both raised concerns among VXLAN experts. The idea o= f using Management VNI may be more acceptable based on its similarity to th= e practice of using Management VLAN.

If you use the inner IP address as the VTEP IP address, then use the M= AC address that the VTEP would respond with when replying to an ARP for tha= t VTEP IP address. If a VXLAN expert disagrees with this, could you kindly = tell me who it is so that I can understand their disagreement? So this hand= les the case where the VNI is not a user-tenant VNI. If the VNI used in the= BFD packet is a user-tenant VNI, then the receiving VTEP MUST have an IP a= ddress in that VNI (mapped to a VRF) else you cannot use that VNI in the BF= D packet. Why won't this combination address all the cases you've l= isted? What am I missing? Define VNI 1 as a possible use, not VNI 0. I obje= cted to VNI 0 because there are too many switching siicon out there and som= e of them will not be able to handle this scenario.

Dinesh

Regards,
Greg

On Wed, Jul 31, 2019 at 12:03 PM Dine= sh Dutt <didutt@gm= ail.com> wrote:
Hi Greg,

As long as the inner MAC address is such that the packet is trapped to= the CPU, it should be fine for use as an inner MAC is it not? Stating that= is better than trying to force a management VNI. What if someone wants to = test connectivity on a specific VNI? I would not pick a loopback IP address= for this since that address range is host/node local only. Is there a reas= on you're not using the VTEP IP as the inner IP address ?

Dinesh

On Wed, Jul 31, 2019 at 5:48 AM Greg = Mirsky <gregi= mirsky@gmail.com> wrote:
Dear All,
thank you for your comments, suggestions on this issue, probably the m= ost challenging for this specification. In the course of our discussions, w= e've agreed to abandon the request to allocate the dedicated MAC addres= s to be used as the destination MAC address in the inner Ethernet frame. Al= so, earlier using VNI 0 was changed from mandatory to one of the options an= implementation may offer to an operator. The most recent discussion was wh= ether VTEP's MAC address might be used as the destination MAC address i= n the inner Ethernet frame. As I recall it, the comments from VXLAN experts= equally split with one for it and one against. Hence I would like to propo= se a new text to resolve the issue. The idea is to let an operator select M= anagement VNI and use that VNI in VXLAN encapsulation of BFD Control packet= s:
NEW TEXT:
Cc: Greg Mirsky , "Acee Lindem (acee)" , "idr@ietf.org" , Albert Bloomberg , "Ketan Talaulikar (ketant)" , "lsr@ietf.org" , "rtg-bfd@ietf.org" , Albert F , Susan Hares Subject: Re: [Lsr] [Idr] draft-merciaz-idr-bgp-bfd-strict-mode Message-ID: <20190801204844.GB19692@pfrc.org> References: <5D3A0EB4029103460087056A_0_2148724@msclnypmsgsv03> <01c901d54326$80a67af0$81f370d0$@ndzh.com> <82732FCE-F604-4501-AED0-EE35E86A72B8@cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: X-Mailman-Approved-At: Thu, 01 Aug 2019 14:17:48 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Aug 2019 20:46:50 -0000 Les, On Sun, Jul 28, 2019 at 12:23:05AM +0000, Les Ginsberg (ginsberg) wrote: > I have a related question: > > In the case where the BGP neighbor is multiple hops away, what benefit does BFD dampening provide? > (Note that I am assuming that there likely would be single hop BFD sessions used by the IGPs (for example) along the path to the BGP neighbor and expecting that BFD dampening would be use for the single hop sessions when appropriate.) Multihop eBGP is an example case. There may be no "IGP" between the two routers. -- Jeff From nobody Fri Aug 2 10:27:30 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BE447120746; Fri, 2 Aug 2019 10:27:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.998 X-Spam-Level: X-Spam-Status: No, score=-0.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, FREEMAIL_REPLY=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 02mXDmp1KD0r; Fri, 2 Aug 2019 10:27:26 -0700 (PDT) Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 06DCC1201AA; Fri, 2 Aug 2019 10:27:26 -0700 (PDT) Received: by mail-wr1-x435.google.com with SMTP id z1so77950030wru.13; Fri, 02 Aug 2019 10:27:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=JgHRGftMKUOWnxRnRtUbNliJaugZEdiiGsMfVLK8jhQ=; b=ZcAlZKlASwBg67txZMsBDgVaTxyUE2PA8VZk7wgheUf+A2Gh/7nXdcoYzkKttelWbk K3ncms8+UEhdblT338nl5wcTmm/OpQW0kFPslo76/yFJSpUPKBnp6iPYIehS1/QArY1F R1n56QCbAi/U6gqX4ajPezEO0+qItFbbkRQcUxZSwx9WNSt35myoAbQrbVSnNrR3OrBM Qj93W/TucgFe7A/jOCvOoSh4WIY7alqlFHr1inBKlWriKqir55GNX3O1gxS3BLqANBPw b3ZMtrX/07W+5RTvz6tBlKgsekg9sv7evQRcEZXTgQn0p6woGfyv9YZdJH9ttDsGU+W2 wQxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=JgHRGftMKUOWnxRnRtUbNliJaugZEdiiGsMfVLK8jhQ=; b=j17ciP/7ZzLyqtu14YveFeYVj1rkzJt3GE7lmKr8eZ98qvlOhwfQ2XKeS0Jb0imNIM jqlykPrJtNLdRMlw5XeW3BywomeYBb0Iiwq+Yl+8wCKPQCK0yvJqq5HJTe8NDJe0Oecx 98hFVAQogywWF/7Y/9iApn9dvSPjfTxdltMIr6Sj3WUZ2+JkSYPc1DtvdN6nyHjWULQ1 dd7uA+wbEFKoXCMNhVIKkESsRSYEVIMqQDv5kdE8VgZ5++3MktER/CvKwR+GTnpx1FaX HmSmRoK6lQPSAQLIb3mFzOExpta0zAHjpsvhG5TwBds/Z0miz/hP9CfydGduHOJ5Q2/x LSDA== X-Gm-Message-State: APjAAAUywOYf1YHD0CQP4iai1LpsDi1yVvKMGNd7rjWlKKU8Pnk0nrJx 4ueZV+jTCNe6yEckF1pmikXrtO/tV8a7BfETK4g= X-Google-Smtp-Source: APXvYqx604TjXqvSholXOwcM6LCAkaeBmmywhakbDt7S2bJq5maoRoqtKdQlSnCjhxKYRwA3Md9tNbz9eY7UrUMEH20= X-Received: by 2002:a5d:5644:: with SMTP id j4mr67137255wrw.144.1564766844409; Fri, 02 Aug 2019 10:27:24 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Santosh P K Date: Fri, 2 Aug 2019 10:27:13 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: "Joel M. Halpern" Cc: Greg Mirsky , Dinesh Dutt , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000eadb95058f25ab16" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Aug 2019 17:27:29 -0000 --000000000000eadb95058f25ab16 Content-Type: text/plain; charset="UTF-8" I have cross checked point raised about MAC address usage. It is possible that tenant could be using physical MAC address and when a packet comes with valid VNI with a MAC address that is being used by tenant then packet will be sent to that tenant. This rules out the fact that we could use physical MAC address as inner MAC to ensure packets get terminated at VTEP itself. Thanks Santosh P K On Wed, Jul 31, 2019 at 11:00 AM Santosh P K wrote: > Joel, > Thanks for your inputs. I checked implementation within Vmware. Perhaps > I should have been more clear about MAC address space while checking > internally. I will cross check again for the same and get back on this > list. > > Thanks > Santosh P K > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern > wrote: > >> Sorry to ask a stupid question. Whose implementation? >> >> The reason I ask is that as far as I can tell, since the tenant does not >> have any control access to the VTEP, there is no reason for the VTEP to >> have a MAC address in the tenant space. Yes, the device has a physical >> MAC address. But the tenant could well be using that MAC address. Yes, >> they would be violating the Ethernet spec. But the whole point of >> segregation is not to care about such issues. >> >> On the other hand, if you tell me that the VMWare implementation has an >> Ethernet address that is part of the tenant space, well, they made up >> this particular game. >> >> Yours, >> Joel >> >> On 7/31/2019 1:44 PM, Santosh P K wrote: >> > I have checked with implementation in data path. When we receive a >> > packet with valid VNI then lookup for MAC will happen and it is VTEP >> own >> > MAC then it will be trapped to control plane for processing. I think we >> > can have following options >> > 1. Optional managment VNI >> > 2. Mandatory inner MAC set to VTEP mac >> > 3. Inner IP TTL set to 1 to avoid forwarding of packet via inner IP >> > address. >> > >> > >> > Thoughts? >> > >> > Thansk >> > Santosh P K >> > >> > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky > > > wrote: >> > >> > Hi Dinesh, >> > thank you for your consideration of the proposal and questions. What >> > would you see as the scope of testing the connectivity for the >> > specific VNI? If it is tenant-to-tenant, then VTEPs will treat these >> > packets as regular user frames. More likely, these could be Layer 2 >> > OAM, e.g. CCM frames. The reason to use 127/8 for IPv4, and >> > 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to safeguard from leaking >> > Ethernet frames with BFD Control packet to a tenant. >> > You've suggested using a MAC address to trap the control packet at >> > VTEP. What that address could be? We had proposed using the >> > dedicated MAC and VTEP's MAC and both raised concerns among VXLAN >> > experts. The idea of using Management VNI may be more acceptable >> > based on its similarity to the practice of using Management VLAN. >> > >> > Regards, >> > Greg >> > >> > On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt > > > wrote: >> > >> > Hi Greg, >> > >> > As long as the inner MAC address is such that the packet is >> > trapped to the CPU, it should be fine for use as an inner MAC is >> > it not? Stating that is better than trying to force a management >> > VNI. What if someone wants to test connectivity on a specific >> > VNI? I would not pick a loopback IP address for this since that >> > address range is host/node local only. Is there a reason you're >> > not using the VTEP IP as the inner IP address ? >> > >> > Dinesh >> > >> > On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky >> > > wrote: >> > >> > Dear All, >> > thank you for your comments, suggestions on this issue, >> > probably the most challenging for this specification. In the >> > course of our discussions, we've agreed to abandon the >> > request to allocate the dedicated MAC address to be used as >> > the destination MAC address in the inner Ethernet frame. >> > Also, earlier using VNI 0 was changed from mandatory to one >> > of the options an implementation may offer to an operator. >> > The most recent discussion was whether VTEP's MAC address >> > might be used as the destination MAC address in the inner >> > Ethernet frame. As I recall it, the comments from VXLAN >> > experts equally split with one for it and one against. Hence >> > I would like to propose a new text to resolve the issue. The >> > idea is to let an operator select Management VNI and use >> > that VNI in VXLAN encapsulation of BFD Control packets: >> > NEW TEXT: >> > >> > An operator MUST select a VNI number to be used as >> > Management VNI. VXLAN packet for Management VNI MUST NOT >> > be sent to a tenant. VNI number 1 is RECOMMENDED as the >> > default for Management VNI. >> > >> > With that new text, what can be the value of the destination >> > MAC in the inner Ethernet? I tend to believe that it can be >> > anything and ignored by the reciever VTEP. Also, if the >> > trapping is based on VNI number, the destination IP address >> > of the inner IP packet can from the range 127/8 for IPv4, >> > and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. And >> > lastly, the TTL to be set to 1 (no change here). >> > >> > Much appreciate your comments, questions, and suggestions. >> > >> > Best regards, >> > Greg >> > >> > --000000000000eadb95058f25ab16 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I have cross checked point raised about MAC address usage.= It is possible that tenant could be using physical MAC address and when a = packet comes with valid VNI with a MAC address that is being used by tenant= then packet will be sent to that tenant. This rules out the fact that we c= ould use physical MAC address as inner MAC to ensure packets get terminated= at VTEP itself.=C2=A0

Thanks
Santosh P K=C2= =A0

On Wed, Jul 31, 2019 at 11:00 AM Santosh P K <santosh.pallagatti@gmail.com> wrote:<= br>
Joel,
=C2=A0 =C2=A0Thanks for your inputs. I checked implementation wi= thin Vmware. Perhaps I should have been more clear about MAC address space = while checking internally. I will cross check again for the same and get ba= ck on this list.=C2=A0

Thanks
Santosh P = K=C2=A0

On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern <jmh@joelhalpern.com&g= t; wrote:
Sorry = to ask a stupid question.=C2=A0 Whose implementation?

The reason I ask is that as far as I can tell, since the tenant does not have any control access to the VTEP, there is no reason for the VTEP to have a MAC address in the tenant space.=C2=A0 Yes, the device has a physica= l
MAC address.=C2=A0 But the tenant could well be using that MAC address.=C2= =A0 Yes,
they would be violating the Ethernet spec.=C2=A0 But the whole point of segregation is not to care about such issues.

On the other hand, if you tell me that the VMWare implementation has an Ethernet address that is part of the tenant space, well, they made up
this particular game.

Yours,
Joel

On 7/31/2019 1:44 PM, Santosh P K wrote:
> I have checked with implementation in data path. When we receive a > packet with valid VNI then lookup for MAC will happen and it is VTEP o= wn
> MAC then it will be trapped to control plane for processing. I think w= e
> can have following options
> 1. Optional managment VNI
> 2. Mandatory inner MAC set to VTEP mac
> 3. Inner IP TTL set to 1 to avoid forwarding of packet via inner IP > address.
>
>
> Thoughts?
>
> Thansk
> Santosh P K
>
> On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky <gregimirsky@gmail.com
> <mailto:= gregimirsky@gmail.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0thank you for your consideration of the proposal an= d questions. What
>=C2=A0 =C2=A0 =C2=A0would you see as the scope of testing the connectiv= ity for the
>=C2=A0 =C2=A0 =C2=A0specific VNI? If it is tenant-to-tenant, then VTEPs= will treat these
>=C2=A0 =C2=A0 =C2=A0packets as regular user frames. More likely, these = could be Layer 2
>=C2=A0 =C2=A0 =C2=A0OAM, e.g. CCM frames. The reason to use 127/8 for I= Pv4, and
>=C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to safeguard = from leaking
>=C2=A0 =C2=A0 =C2=A0Ethernet frames with BFD Control packet to a tenant= .
>=C2=A0 =C2=A0 =C2=A0You've suggested using a MAC address to trap th= e control packet at
>=C2=A0 =C2=A0 =C2=A0VTEP. What that address could be? We had proposed u= sing the
>=C2=A0 =C2=A0 =C2=A0dedicated MAC and VTEP's MAC and both raised co= ncerns among VXLAN
>=C2=A0 =C2=A0 =C2=A0experts. The idea of using Management VNI may be mo= re acceptable
>=C2=A0 =C2=A0 =C2=A0based on its similarity to the practice of using Ma= nagement VLAN.
>
>=C2=A0 =C2=A0 =C2=A0Regards,
>=C2=A0 =C2=A0 =C2=A0Greg
>
>=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt <didutt@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Hi Greg,
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0As long as the inner MAC address is s= uch that the packet is
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapped to the CPU, it should be fine= for use as an inner MAC is
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it not? Stating that is better than t= rying to force a management
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI. What if someone wants to test co= nnectivity on a specific
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI? I would not pick a loopback IP a= ddress for this since that
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address range is host/node local only= . Is there a reason you're
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0not using the VTEP IP as the inner IP= address ?
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dinesh
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM Greg = Mirsky
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>= ;> wrote:
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comm= ents, suggestions on this issue,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most chall= enging for this specification. In the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussio= ns, we've agreed to abandon the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the= dedicated MAC address to be used as
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC add= ress in the inner Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI= 0 was changed from mandatory to one
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an imple= mentation may offer to an operator.
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent discuss= ion was whether VTEP's MAC address
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the de= stination MAC address in the inner
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I re= call it, the comments from VXLAN
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split w= ith one for it and one against. Hence
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose= a new text to resolve the issue. The
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0idea is to let an opera= tor select Management VNI and use
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN encap= sulation of BFD Control packets:
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operat= or MUST select a VNI number to be used as
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Managemen= t VNI. VXLAN packet for Management VNI MUST NOT
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent t= o a tenant. VNI number 1 is RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default f= or Management VNI.
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, wha= t can be the value of the destination
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethern= et? I tend to believe that it can be
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by= the reciever VTEP. Also, if the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VN= I number, the destination IP address
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet = can from the range 127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the r= ange 0:0:0:0:0:FFFF:7F00:0/104. And
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be s= et to 1 (no change here).
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your co= mments, questions, and suggestions.
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>
--000000000000eadb95058f25ab16-- From nobody Fri Aug 2 10:48:46 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9CDC1120774; Fri, 2 Aug 2019 10:44:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.998 X-Spam-Level: X-Spam-Status: No, score=-0.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, FREEMAIL_REPLY=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SpmN2lDRsFeQ; Fri, 2 Aug 2019 10:44:48 -0700 (PDT) Received: from mail-wr1-x432.google.com (mail-wr1-x432.google.com [IPv6:2a00:1450:4864:20::432]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 96BB1120251; Fri, 2 Aug 2019 10:44:47 -0700 (PDT) Received: by mail-wr1-x432.google.com with SMTP id c2so74787598wrm.8; Fri, 02 Aug 2019 10:44:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=JgLSVtnXP3lsBciiVnnEw4FQhFcxw0zg39MS/ewx/IU=; b=F+ISG0Ys1mQ03frgb6vKhmltO+Ub0A/QtxhkgKbR1GXFSpyqprGGdYTPp5rKmm/EPa V3lE4wpHwgzRUE6k4S3Eal5AwlT9oaPGuyPRPOT+UgDeHNxlyrKHIAoZsjnIL2F7M0Wh lCo6AwiUL9W6ASi+oZ2IVs2iJlUSLEjeNVEEbg8GOOH0hQH5hl1Q+Qi54VUoGQm0BHxR swVVvWt8c28IHkqESdWev5eiBU3cLwDLZvr5BjFvuo9D9iquJOVsbSV1Ax4f9N40IXMV W/pTRG45ABIQvj7IOVn797SO8ER6PyDVo4arFOTnwkAfMYglfsGRwboOjpT3W6gQOr3w qLIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=JgLSVtnXP3lsBciiVnnEw4FQhFcxw0zg39MS/ewx/IU=; b=rAEVaxE//kAtgGRPa5GLlihsIPktwF8sYgpgVKQbw0i07tTW5Xs3tDhxVyEqJZ0mTC r+RmH7Nh/R7m4VY6fFUitAx/dIjj3qmjNljU131LpPObfCgNesExCC4L0P8EPcZTh4Sn ca3xDpnX707qtNW4sztqz1B/ylDURUYJRwjqdNrIsG5dIAP/PTdTJ0tLhQfUjDUp7Dor 0lHd7mf1DEMEJUxTSW3gJe1LFTMs4pMaRGycPTQMqbc0WTHgq6zjg45XGkMQ/dEMXbRZ OyoXoaqkwhotDRjVk17SYpf5I61xJjM7BLJDaqOXTspouaOZzeBcNsEbW9BUxMnLFiQ3 zbUg== X-Gm-Message-State: APjAAAXUuCvEC3gnR9x1mNET7LdBNDmxJ9dXSx5W1GrrzQBHEKzU5j7x M6kAeDWUVvmV73wb5cvJU3swRiERnh+vAmoUFh4= X-Google-Smtp-Source: APXvYqxWDSRynrzHLPIJlU2fk9qqCsPAlOd/gatFgUhWuCykhfGw3SLdiwmskT407Mps9EgBgbKzVyNhZH4cDZaMOGA= X-Received: by 2002:adf:cd04:: with SMTP id w4mr99577996wrm.230.1564767886038; Fri, 02 Aug 2019 10:44:46 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dinesh Dutt Date: Fri, 2 Aug 2019 10:44:34 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Santosh P K Cc: "Joel M. Halpern" , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="00000000000000dad6058f25ea85" Archived-At: X-Mailman-Approved-At: Fri, 02 Aug 2019 10:48:45 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Aug 2019 17:44:51 -0000 --00000000000000dad6058f25ea85 Content-Type: text/plain; charset="UTF-8" Thanks for verifying this. On Linux and hardware routers that I'm aware of (Cisco circa 2012 and Cumulus), the physical MAC address is reused across the VNIs on the VTEP. Did you check on a non-VMW device? This is more for my own curiosity. To address the general case, can we not define a well-known (or reserve one) unicast MAC address for use with VTEP? If the MAC address is configurable in BFD command, this can be moot. Dinesh On Fri, Aug 2, 2019 at 10:27 AM Santosh P K wrote: > I have cross checked point raised about MAC address usage. It is possible > that tenant could be using physical MAC address and when a packet comes > with valid VNI with a MAC address that is being used by tenant then packet > will be sent to that tenant. This rules out the fact that we could use > physical MAC address as inner MAC to ensure packets get terminated at VTEP > itself. > > Thanks > Santosh P K > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > wrote: > >> Joel, >> Thanks for your inputs. I checked implementation within Vmware. >> Perhaps I should have been more clear about MAC address space while >> checking internally. I will cross check again for the same and get back on >> this list. >> >> Thanks >> Santosh P K >> >> On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern >> wrote: >> >>> Sorry to ask a stupid question. Whose implementation? >>> >>> The reason I ask is that as far as I can tell, since the tenant does not >>> have any control access to the VTEP, there is no reason for the VTEP to >>> have a MAC address in the tenant space. Yes, the device has a physical >>> MAC address. But the tenant could well be using that MAC address. Yes, >>> they would be violating the Ethernet spec. But the whole point of >>> segregation is not to care about such issues. >>> >>> On the other hand, if you tell me that the VMWare implementation has an >>> Ethernet address that is part of the tenant space, well, they made up >>> this particular game. >>> >>> Yours, >>> Joel >>> >>> On 7/31/2019 1:44 PM, Santosh P K wrote: >>> > I have checked with implementation in data path. When we receive a >>> > packet with valid VNI then lookup for MAC will happen and it is VTEP >>> own >>> > MAC then it will be trapped to control plane for processing. I think >>> we >>> > can have following options >>> > 1. Optional managment VNI >>> > 2. Mandatory inner MAC set to VTEP mac >>> > 3. Inner IP TTL set to 1 to avoid forwarding of packet via inner IP >>> > address. >>> > >>> > >>> > Thoughts? >>> > >>> > Thansk >>> > Santosh P K >>> > >>> > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky >> > > wrote: >>> > >>> > Hi Dinesh, >>> > thank you for your consideration of the proposal and questions. >>> What >>> > would you see as the scope of testing the connectivity for the >>> > specific VNI? If it is tenant-to-tenant, then VTEPs will treat >>> these >>> > packets as regular user frames. More likely, these could be Layer 2 >>> > OAM, e.g. CCM frames. The reason to use 127/8 for IPv4, and >>> > 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to safeguard from leaking >>> > Ethernet frames with BFD Control packet to a tenant. >>> > You've suggested using a MAC address to trap the control packet at >>> > VTEP. What that address could be? We had proposed using the >>> > dedicated MAC and VTEP's MAC and both raised concerns among VXLAN >>> > experts. The idea of using Management VNI may be more acceptable >>> > based on its similarity to the practice of using Management VLAN. >>> > >>> > Regards, >>> > Greg >>> > >>> > On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt >> > > wrote: >>> > >>> > Hi Greg, >>> > >>> > As long as the inner MAC address is such that the packet is >>> > trapped to the CPU, it should be fine for use as an inner MAC >>> is >>> > it not? Stating that is better than trying to force a >>> management >>> > VNI. What if someone wants to test connectivity on a specific >>> > VNI? I would not pick a loopback IP address for this since that >>> > address range is host/node local only. Is there a reason you're >>> > not using the VTEP IP as the inner IP address ? >>> > >>> > Dinesh >>> > >>> > On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky >>> > > wrote: >>> > >>> > Dear All, >>> > thank you for your comments, suggestions on this issue, >>> > probably the most challenging for this specification. In >>> the >>> > course of our discussions, we've agreed to abandon the >>> > request to allocate the dedicated MAC address to be used as >>> > the destination MAC address in the inner Ethernet frame. >>> > Also, earlier using VNI 0 was changed from mandatory to one >>> > of the options an implementation may offer to an operator. >>> > The most recent discussion was whether VTEP's MAC address >>> > might be used as the destination MAC address in the inner >>> > Ethernet frame. As I recall it, the comments from VXLAN >>> > experts equally split with one for it and one against. >>> Hence >>> > I would like to propose a new text to resolve the issue. >>> The >>> > idea is to let an operator select Management VNI and use >>> > that VNI in VXLAN encapsulation of BFD Control packets: >>> > NEW TEXT: >>> > >>> > An operator MUST select a VNI number to be used as >>> > Management VNI. VXLAN packet for Management VNI MUST >>> NOT >>> > be sent to a tenant. VNI number 1 is RECOMMENDED as the >>> > default for Management VNI. >>> > >>> > With that new text, what can be the value of the >>> destination >>> > MAC in the inner Ethernet? I tend to believe that it can be >>> > anything and ignored by the reciever VTEP. Also, if the >>> > trapping is based on VNI number, the destination IP address >>> > of the inner IP packet can from the range 127/8 for IPv4, >>> > and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. And >>> > lastly, the TTL to be set to 1 (no change here). >>> > >>> > Much appreciate your comments, questions, and suggestions. >>> > >>> > Best regards, >>> > Greg >>> > >>> >> --00000000000000dad6058f25ea85 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thanks for verifying this. On Linux and hardware rout= ers that I'm aware of (Cisco circa 2012 and Cumulus), the physical MAC = address is reused across the VNIs on the VTEP. Did you check on a non-VMW d= evice? This is more for my own curiosity.

To addre= ss the general case, can we not define a well-known (or reserve one) unicas= t MAC address for use with VTEP? If the MAC address is configurable in BFD = command, this can be moot.

Dinesh

On = Fri, Aug 2, 2019 at 10:27 AM Santosh P K <santosh.pallagatti@gmail.com> wrote:
I have cross= checked point raised about MAC address usage. It is possible that tenant c= ould be using physical MAC address and when a packet comes with valid VNI w= ith a MAC address that is being used by tenant then packet will be sent to = that tenant. This rules out the fact that we could use physical MAC address= as inner MAC to ensure packets get terminated at VTEP itself.=C2=A0
Thanks
Santosh P K=C2=A0

On Wed, Jul 31, 2019= at 11:00 AM Santosh P K <santosh.pallagatti@gmail.com> wrote:
Joel,
= =C2=A0 =C2=A0Thanks for your inputs. I checked implementation within Vmware= . Perhaps I should have been more clear about MAC address space while check= ing internally. I will cross check again for the same and get back on this = list.=C2=A0

Thanks
Santosh P K=C2=A0

On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern <jmh@joelhalpern.com> wrote:
=
Sorry to ask a stup= id question.=C2=A0 Whose implementation?

The reason I ask is that as far as I can tell, since the tenant does not have any control access to the VTEP, there is no reason for the VTEP to have a MAC address in the tenant space.=C2=A0 Yes, the device has a physica= l
MAC address.=C2=A0 But the tenant could well be using that MAC address.=C2= =A0 Yes,
they would be violating the Ethernet spec.=C2=A0 But the whole point of segregation is not to care about such issues.

On the other hand, if you tell me that the VMWare implementation has an Ethernet address that is part of the tenant space, well, they made up
this particular game.

Yours,
Joel

On 7/31/2019 1:44 PM, Santosh P K wrote:
> I have checked with implementation in data path. When we receive a > packet with valid VNI then lookup for MAC will happen and it is VTEP o= wn
> MAC then it will be trapped to control plane for processing. I think w= e
> can have following options
> 1. Optional managment VNI
> 2. Mandatory inner MAC set to VTEP mac
> 3. Inner IP TTL set to 1 to avoid forwarding of packet via inner IP > address.
>
>
> Thoughts?
>
> Thansk
> Santosh P K
>
> On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky <gregimirsky@gmail.com
> <mailto:= gregimirsky@gmail.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0thank you for your consideration of the proposal an= d questions. What
>=C2=A0 =C2=A0 =C2=A0would you see as the scope of testing the connectiv= ity for the
>=C2=A0 =C2=A0 =C2=A0specific VNI? If it is tenant-to-tenant, then VTEPs= will treat these
>=C2=A0 =C2=A0 =C2=A0packets as regular user frames. More likely, these = could be Layer 2
>=C2=A0 =C2=A0 =C2=A0OAM, e.g. CCM frames. The reason to use 127/8 for I= Pv4, and
>=C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to safeguard = from leaking
>=C2=A0 =C2=A0 =C2=A0Ethernet frames with BFD Control packet to a tenant= .
>=C2=A0 =C2=A0 =C2=A0You've suggested using a MAC address to trap th= e control packet at
>=C2=A0 =C2=A0 =C2=A0VTEP. What that address could be? We had proposed u= sing the
>=C2=A0 =C2=A0 =C2=A0dedicated MAC and VTEP's MAC and both raised co= ncerns among VXLAN
>=C2=A0 =C2=A0 =C2=A0experts. The idea of using Management VNI may be mo= re acceptable
>=C2=A0 =C2=A0 =C2=A0based on its similarity to the practice of using Ma= nagement VLAN.
>
>=C2=A0 =C2=A0 =C2=A0Regards,
>=C2=A0 =C2=A0 =C2=A0Greg
>
>=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt <didutt@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Hi Greg,
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0As long as the inner MAC address is s= uch that the packet is
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapped to the CPU, it should be fine= for use as an inner MAC is
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it not? Stating that is better than t= rying to force a management
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI. What if someone wants to test co= nnectivity on a specific
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI? I would not pick a loopback IP a= ddress for this since that
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address range is host/node local only= . Is there a reason you're
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0not using the VTEP IP as the inner IP= address ?
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dinesh
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM Greg = Mirsky
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>= ;> wrote:
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comm= ents, suggestions on this issue,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most chall= enging for this specification. In the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussio= ns, we've agreed to abandon the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the= dedicated MAC address to be used as
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC add= ress in the inner Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI= 0 was changed from mandatory to one
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an imple= mentation may offer to an operator.
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent discuss= ion was whether VTEP's MAC address
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the de= stination MAC address in the inner
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I re= call it, the comments from VXLAN
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split w= ith one for it and one against. Hence
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose= a new text to resolve the issue. The
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0idea is to let an opera= tor select Management VNI and use
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN encap= sulation of BFD Control packets:
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operat= or MUST select a VNI number to be used as
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Managemen= t VNI. VXLAN packet for Management VNI MUST NOT
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent t= o a tenant. VNI number 1 is RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default f= or Management VNI.
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, wha= t can be the value of the destination
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethern= et? I tend to believe that it can be
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by= the reciever VTEP. Also, if the
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VN= I number, the destination IP address
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet = can from the range 127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the r= ange 0:0:0:0:0:FFFF:7F00:0/104. And
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be s= et to 1 (no change here).
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your co= mments, questions, and suggestions.
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>
--00000000000000dad6058f25ea85-- From nobody Fri Aug 2 11:03:42 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7EC7C12079B; Fri, 2 Aug 2019 11:03:40 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.701 X-Spam-Level: X-Spam-Status: No, score=-2.701 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=joelhalpern.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 71z737MVJzyg; Fri, 2 Aug 2019 11:03:38 -0700 (PDT) Received: from maila2.tigertech.net (maila2.tigertech.net [208.80.4.152]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 477C2120795; Fri, 2 Aug 2019 11:03:34 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by maila2.tigertech.net (Postfix) with ESMTP id 460Zlp1PV7zVk5S; Fri, 2 Aug 2019 11:03:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelhalpern.com; s=2.tigertech; t=1564769014; bh=R6mPtiZey9KVQgwRrRlU8tb+lhg2m9NPw1IUDLvFYX8=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=VF+IAKsfQIJyp4qyTBnhgVRA0HZkLm2RZ14HazQwxV1yL2EZd6+mI+a4y6IHkdFbQ HlDXzZkbNxDSREzpDszZb0Zt5Pl08juByiNfP2SIE/NkFCtZWxKIa6fWW8WfDNc9/W LPiz+AycLTMGHB2nhQS3CesWnzzz+oqP/cns2MaY= X-Virus-Scanned: Debian amavisd-new at maila2.tigertech.net Received: from [172.20.7.244] (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by maila2.tigertech.net (Postfix) with ESMTPSA id 460Zll6vpDzVht3; Fri, 2 Aug 2019 11:03:31 -0700 (PDT) Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt , Santosh P K Cc: Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org References: From: "Joel M. Halpern" Message-ID: Date: Fri, 2 Aug 2019 14:03:31 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Aug 2019 18:03:41 -0000 If I am reading your various emails correctly Dinesh (and I may have missed something) you are trying to use the MAC address because you want to be able to send these BFD packets over arbitrary VNI to monitor the VNI. That is not a requirement identified in the document. It is not even a problem I understand, since all the VNI between an ingress and egress VTEP share fate. Yours, Joel On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > Thanks for verifying this. On Linux and hardware routers that I'm aware > of (Cisco circa 2012 and Cumulus), the physical MAC address is reused > across the VNIs on the VTEP. Did you check on a non-VMW device? This is > more for my own curiosity. > > To address the general case, can we not define a well-known (or reserve > one) unicast MAC address for use with VTEP? If the MAC address is > configurable in BFD command, this can be moot. > > Dinesh > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > > wrote: > > I have cross checked point raised about MAC address usage. It is > possible that tenant could be using physical MAC address and when a > packet comes with valid VNI with a MAC address that is being used by > tenant then packet will be sent to that tenant. This rules out the > fact that we could use physical MAC address as inner MAC to ensure > packets get terminated at VTEP itself. > > Thanks > Santosh P K > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > > > wrote: > > Joel, >    Thanks for your inputs. I checked implementation within > Vmware. Perhaps I should have been more clear about MAC address > space while checking internally. I will cross check again for > the same and get back on this list. > > Thanks > Santosh P K > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern > > wrote: > > Sorry to ask a stupid question.  Whose implementation? > > The reason I ask is that as far as I can tell, since the > tenant does not > have any control access to the VTEP, there is no reason for > the VTEP to > have a MAC address in the tenant space.  Yes, the device has > a physical > MAC address.  But the tenant could well be using that MAC > address.  Yes, > they would be violating the Ethernet spec.  But the whole > point of > segregation is not to care about such issues. > > On the other hand, if you tell me that the VMWare > implementation has an > Ethernet address that is part of the tenant space, well, > they made up > this particular game. > > Yours, > Joel > > On 7/31/2019 1:44 PM, Santosh P K wrote: > > I have checked with implementation in data path. When we > receive a > > packet with valid VNI then lookup for MAC will happen and > it is VTEP own > > MAC then it will be trapped to control plane for > processing. I think we > > can have following options > > 1. Optional managment VNI > > 2. Mandatory inner MAC set to VTEP mac > > 3. Inner IP TTL set to 1 to avoid forwarding of packet > via inner IP > > address. > > > > > > Thoughts? > > > > Thansk > > Santosh P K > > > > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky > > > >> wrote: > > > >     Hi Dinesh, > >     thank you for your consideration of the proposal and > questions. What > >     would you see as the scope of testing the > connectivity for the > >     specific VNI? If it is tenant-to-tenant, then VTEPs > will treat these > >     packets as regular user frames. More likely, these > could be Layer 2 > >     OAM, e.g. CCM frames. The reason to use 127/8 for > IPv4, and > >     0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to safeguard > from leaking > >     Ethernet frames with BFD Control packet to a tenant. > >     You've suggested using a MAC address to trap the > control packet at > >     VTEP. What that address could be? We had proposed > using the > >     dedicated MAC and VTEP's MAC and both raised concerns > among VXLAN > >     experts. The idea of using Management VNI may be more > acceptable > >     based on its similarity to the practice of using > Management VLAN. > > > >     Regards, > >     Greg > > > >     On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt > > >     >> > wrote: > > > >         Hi Greg, > > > >         As long as the inner MAC address is such that the > packet is > >         trapped to the CPU, it should be fine for use as > an inner MAC is > >         it not? Stating that is better than trying to > force a management > >         VNI. What if someone wants to test connectivity > on a specific > >         VNI? I would not pick a loopback IP address for > this since that > >         address range is host/node local only. Is there a > reason you're > >         not using the VTEP IP as the inner IP address ? > > > >         Dinesh > > > >         On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky > >          >> wrote: > > > >             Dear All, > >             thank you for your comments, suggestions on > this issue, > >             probably the most challenging for this > specification. In the > >             course of our discussions, we've agreed to > abandon the > >             request to allocate the dedicated MAC address > to be used as > >             the destination MAC address in the inner > Ethernet frame. > >             Also, earlier using VNI 0 was changed from > mandatory to one > >             of the options an implementation may offer to > an operator. > >             The most recent discussion was whether VTEP's > MAC address > >             might be used as the destination MAC address > in the inner > >             Ethernet frame. As I recall it, the comments > from VXLAN > >             experts equally split with one for it and one > against. Hence > >             I would like to propose a new text to resolve > the issue. The > >             idea is to let an operator select Management > VNI and use > >             that VNI in VXLAN encapsulation of BFD > Control packets: > >             NEW TEXT: > > > >                 An operator MUST select a VNI number to > be used as > >                 Management VNI. VXLAN packet for > Management VNI MUST NOT > >                 be sent to a tenant. VNI number 1 is > RECOMMENDED as the > >                 default for Management VNI. > > > >             With that new text, what can be the value of > the destination > >             MAC in the inner Ethernet? I tend to believe > that it can be > >             anything and ignored by the reciever VTEP. > Also, if the > >             trapping is based on VNI number, the > destination IP address > >             of the inner IP packet can from the range > 127/8 for IPv4, > >             and for IPv6 from the range > 0:0:0:0:0:FFFF:7F00:0/104. And > >             lastly, the TTL to be set to 1 (no change here). > > > >             Much appreciate your comments, questions, and > suggestions. > > > >             Best regards, > >             Greg > > > From nobody Fri Aug 2 15:17:13 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2B58D1200A4; Fri, 2 Aug 2019 15:17:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.701 X-Spam-Level: X-Spam-Status: No, score=-2.701 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=joelhalpern.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iFwxg1rszY55; Fri, 2 Aug 2019 15:17:08 -0700 (PDT) Received: from mailb1.tigertech.net (mailb1.tigertech.net [208.80.4.153]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A5F19120077; Fri, 2 Aug 2019 15:17:08 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mailb1.tigertech.net (Postfix) with ESMTP id 460hNN3zwlz26ggY; Fri, 2 Aug 2019 15:17:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelhalpern.com; s=2.tigertech; t=1564784228; bh=uhSgHD/kW5tTVQ2OKU5PkjJ72CTpBTF/TSqLfVup5Uk=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=E7htyAbfBXS6oaRXjTqc744JYqCkbRXXnD7zYllCxtzk9BB8Ugda5j5a4Zn73ikNG U1PIYvK2TZVwEwpdYCHr+0DDadtgHWgRUiTOhf7haieVB+0VYFFpzjxtToN3ha4HQ0 WgmNgQ+ZaK4hkzmNgFwhfw5wekFfPMN/8Slj1W6Y= X-Virus-Scanned: Debian amavisd-new at mailb1.tigertech.net Received: from [172.20.7.244] (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailb1.tigertech.net (Postfix) with ESMTPSA id 460hNM1qkXz26gZm; Fri, 2 Aug 2019 15:17:07 -0700 (PDT) Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org References: From: "Joel M. Halpern" Message-ID: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> Date: Fri, 2 Aug 2019 18:17:05 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Aug 2019 22:17:11 -0000 Your response seems to miss two points: First, the problem you describe is not what the document says it is solving. To the degree it discusses it at all, the document says " In most cases, a single BFD session is sufficient for the given VTEP to monitor the reachability of a remote VTEP, regardless of the number of VNIs in common. " Second, you assume the existence of an IP address for a VTEP within a VNI. As with the MAC address, the VTEP does not have an IP address within the VNI. Some implementations may have created such a thing, but the general construct, as defined to date, does not support such. In short, you are requiring a behavior that violates the architectural structure of overlay / underlay separation, and common usage. And you are doing so to support a use case that the working group has not indicated in the document as important. Yours, Joel On 8/2/2019 5:01 PM, Dinesh Dutt wrote: > Joel, > > You understood correctly. > > The VNIs may not share fate due to misconfiguration. And I strongly > suspect someone will want to use BFD for that because its about checking > path continuity as stated by the draft. As long as there's a valid IP > (because it's BFD) owned by the VTEP in that VNI, you can use BFD in > that VNI. Thats all that you need to dictate.  That IP address has a MAC > address and you can use that on the inner frame. That is all normal > VXLAN processing. The outer IP is always that of the VTEP. > > Dinesh > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern > wrote: > > If I am reading your various emails correctly Dinesh (and I may have > missed something) you are trying to use the MAC address because you > want > to be able to send these BFD packets over arbitrary VNI to monitor the > VNI.  That is not a requirement identified in the document.  It is not > even a problem I understand, since all the VNI between an ingress and > egress VTEP share fate. > > Yours, > Joel > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > > Thanks for verifying this. On Linux and hardware routers that I'm > aware > > of (Cisco circa 2012 and Cumulus), the physical MAC address is > reused > > across the VNIs on the VTEP. Did you check on a non-VMW device? > This is > > more for my own curiosity. > > > > To address the general case, can we not define a well-known (or > reserve > > one) unicast MAC address for use with VTEP? If the MAC address is > > configurable in BFD command, this can be moot. > > > > Dinesh > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > > > >> wrote: > > > >     I have cross checked point raised about MAC address usage. It is > >     possible that tenant could be using physical MAC address and > when a > >     packet comes with valid VNI with a MAC address that is being > used by > >     tenant then packet will be sent to that tenant. This rules > out the > >     fact that we could use physical MAC address as inner MAC to > ensure > >     packets get terminated at VTEP itself. > > > >     Thanks > >     Santosh P K > > > >     On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > >      > >> > >     wrote: > > > >         Joel, > >             Thanks for your inputs. I checked implementation within > >         Vmware. Perhaps I should have been more clear about MAC > address > >         space while checking internally. I will cross check again for > >         the same and get back on this list. > > > >         Thanks > >         Santosh P K > > > >         On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern > >          > >> wrote: > > > >             Sorry to ask a stupid question.  Whose implementation? > > > >             The reason I ask is that as far as I can tell, since the > >             tenant does not > >             have any control access to the VTEP, there is no > reason for > >             the VTEP to > >             have a MAC address in the tenant space.  Yes, the > device has > >             a physical > >             MAC address.  But the tenant could well be using that MAC > >             address.  Yes, > >             they would be violating the Ethernet spec.  But the whole > >             point of > >             segregation is not to care about such issues. > > > >             On the other hand, if you tell me that the VMWare > >             implementation has an > >             Ethernet address that is part of the tenant space, well, > >             they made up > >             this particular game. > > > >             Yours, > >             Joel > > > >             On 7/31/2019 1:44 PM, Santosh P K wrote: > >              > I have checked with implementation in data path. > When we > >             receive a > >              > packet with valid VNI then lookup for MAC will > happen and > >             it is VTEP own > >              > MAC then it will be trapped to control plane for > >             processing. I think we > >              > can have following options > >              > 1. Optional managment VNI > >              > 2. Mandatory inner MAC set to VTEP mac > >              > 3. Inner IP TTL set to 1 to avoid forwarding of packet > >             via inner IP > >              > address. > >              > > >              > > >              > Thoughts? > >              > > >              > Thansk > >              > Santosh P K > >              > > >              > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky > >              > > > >              > > >              >>> wrote: > >              > > >              >     Hi Dinesh, > >              >     thank you for your consideration of the > proposal and > >             questions. What > >              >     would you see as the scope of testing the > >             connectivity for the > >              >     specific VNI? If it is tenant-to-tenant, then > VTEPs > >             will treat these > >              >     packets as regular user frames. More likely, these > >             could be Layer 2 > >              >     OAM, e.g. CCM frames. The reason to use 127/8 for > >             IPv4, and > >              >     0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to safeguard > >             from leaking > >              >     Ethernet frames with BFD Control packet to a > tenant. > >              >     You've suggested using a MAC address to trap the > >             control packet at > >              >     VTEP. What that address could be? We had proposed > >             using the > >              >     dedicated MAC and VTEP's MAC and both raised > concerns > >             among VXLAN > >              >     experts. The idea of using Management VNI may > be more > >             acceptable > >              >     based on its similarity to the practice of using > >             Management VLAN. > >              > > >              >     Regards, > >              >     Greg > >              > > >              >     On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt > >              > > > >              >      >>> > >             wrote: > >              > > >              >         Hi Greg, > >              > > >              >         As long as the inner MAC address is such > that the > >             packet is > >              >         trapped to the CPU, it should be fine for > use as > >             an inner MAC is > >              >         it not? Stating that is better than trying to > >             force a management > >              >         VNI. What if someone wants to test > connectivity > >             on a specific > >              >         VNI? I would not pick a loopback IP > address for > >             this since that > >              >         address range is host/node local only. Is > there a > >             reason you're > >              >         not using the VTEP IP as the inner IP > address ? > >              > > >              >         Dinesh > >              > > >              >         On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky > >              >          > >              > > >              >>> wrote: > >              > > >              >             Dear All, > >              >             thank you for your comments, > suggestions on > >             this issue, > >              >             probably the most challenging for this > >             specification. In the > >              >             course of our discussions, we've agreed to > >             abandon the > >              >             request to allocate the dedicated MAC > address > >             to be used as > >              >             the destination MAC address in the inner > >             Ethernet frame. > >              >             Also, earlier using VNI 0 was changed from > >             mandatory to one > >              >             of the options an implementation may > offer to > >             an operator. > >              >             The most recent discussion was whether > VTEP's > >             MAC address > >              >             might be used as the destination MAC > address > >             in the inner > >              >             Ethernet frame. As I recall it, the > comments > >             from VXLAN > >              >             experts equally split with one for it > and one > >             against. Hence > >              >             I would like to propose a new text to > resolve > >             the issue. The > >              >             idea is to let an operator select > Management > >             VNI and use > >              >             that VNI in VXLAN encapsulation of BFD > >             Control packets: > >              >             NEW TEXT: > >              > > >              >                 An operator MUST select a VNI > number to > >             be used as > >              >                 Management VNI. VXLAN packet for > >             Management VNI MUST NOT > >              >                 be sent to a tenant. VNI number 1 is > >             RECOMMENDED as the > >              >                 default for Management VNI. > >              > > >              >             With that new text, what can be the > value of > >             the destination > >              >             MAC in the inner Ethernet? I tend to > believe > >             that it can be > >              >             anything and ignored by the reciever VTEP. > >             Also, if the > >              >             trapping is based on VNI number, the > >             destination IP address > >              >             of the inner IP packet can from the range > >             127/8 for IPv4, > >              >             and for IPv6 from the range > >             0:0:0:0:0:FFFF:7F00:0/104. And > >              >             lastly, the TTL to be set to 1 (no > change here). > >              > > >              >             Much appreciate your comments, > questions, and > >             suggestions. > >              > > >              >             Best regards, > >              >             Greg > >              > > > > From nobody Fri Aug 2 15:43:51 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F04D512013B; Fri, 2 Aug 2019 14:01:38 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XEhYPbRcKMIX; Fri, 2 Aug 2019 14:01:35 -0700 (PDT) Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AE5231200E9; Fri, 2 Aug 2019 14:01:34 -0700 (PDT) Received: by mail-wr1-x42b.google.com with SMTP id r1so78444076wrl.7; Fri, 02 Aug 2019 14:01:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=fCsOVt0ib+Fkl2ub9EpEV8CVgMJ2hJyfaSGQ7QF0czM=; b=Df9o2+ney6cBWnNvaAfTZOdSob0JdIzshQFZ7QdhSUXVF+phgc0xo+hjZ0zTGS/qlw ISKOx2E65NIoiS+pnHQM+ojUBjBCBihvGxCeRxFC6+uhGeYO07xo7E4FbfwjIdCuhhkt KDKj0roUf8G3o7S9DHZ/0x2bkjnivVKB4do4hdVz38TrpW0y6QNDFPebDUedW1rzqHRm WcC4R+xKmAksGPgfv0EiBRDlPOFlXaXQKvDQuSbNOEhkpExfDTxnZFZhsg/UEYQMASdt rUimINOYjSPmFhJ123IRFJj2LOGnIiIMu5Pu8rrrVg+Kay+zSvw6U+0yPKX57FzNWe5Q PIdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=fCsOVt0ib+Fkl2ub9EpEV8CVgMJ2hJyfaSGQ7QF0czM=; b=FqYz+i+vIHC6M5GqhrzNH3NdLDJZSfIj8QD73yvJMaVzhZk00K/NJl9RedT672FT0t WqDvi7Jf9Ww8gSzlmdlBSwr4mSuF6zIvtzoyGHSAHIXxwcnhbpVXVptFZyOvu2ry7/A7 XBkpXmwd/TLG4vDGaK5+ZskgkAeuKYxyo2281bEjBzvcbyFvz1MH3ISSwUcAvpzPOibf EhT6+fK8dfQQZ5TNsSv2FOI1bcRk5pZytXOeBBzmqwGxxjaLSlrhAliExDzmE8hl1fzL zrzhtF7Dw17+UwVhSpSmLOJBj3JfgXFTLAhV4+2LA0nLsFx2vp5aIpjW+1A+FyIjLT/d YUgQ== X-Gm-Message-State: APjAAAWjqtF966lECpFmBe8ratyt/CU5/ZUov9tQleXzHi6gwABn4foJ QK718s6ZOD+c8W//joNE+bU04RoxJuckX/1XakI= X-Google-Smtp-Source: APXvYqxc2uxA7+3U5iA/8R8yWBZpalAwmhVF75sHFcAMYQoQjKpEASS3YQx0EXUBajrNV/vm3/Rw3s73qqvmuzjwaps= X-Received: by 2002:a05:6000:1043:: with SMTP id c3mr2826951wrx.236.1564779693140; Fri, 02 Aug 2019 14:01:33 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dinesh Dutt Date: Fri, 2 Aug 2019 14:01:21 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: "Joel M. Halpern" Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000c2f1cd058f28a9f6" Archived-At: X-Mailman-Approved-At: Fri, 02 Aug 2019 15:43:49 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Aug 2019 21:01:39 -0000 --000000000000c2f1cd058f28a9f6 Content-Type: text/plain; charset="UTF-8" Joel, You understood correctly. The VNIs may not share fate due to misconfiguration. And I strongly suspect someone will want to use BFD for that because its about checking path continuity as stated by the draft. As long as there's a valid IP (because it's BFD) owned by the VTEP in that VNI, you can use BFD in that VNI. Thats all that you need to dictate. That IP address has a MAC address and you can use that on the inner frame. That is all normal VXLAN processing. The outer IP is always that of the VTEP. Dinesh On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern wrote: > If I am reading your various emails correctly Dinesh (and I may have > missed something) you are trying to use the MAC address because you want > to be able to send these BFD packets over arbitrary VNI to monitor the > VNI. That is not a requirement identified in the document. It is not > even a problem I understand, since all the VNI between an ingress and > egress VTEP share fate. > > Yours, > Joel > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > > Thanks for verifying this. On Linux and hardware routers that I'm aware > > of (Cisco circa 2012 and Cumulus), the physical MAC address is reused > > across the VNIs on the VTEP. Did you check on a non-VMW device? This is > > more for my own curiosity. > > > > To address the general case, can we not define a well-known (or reserve > > one) unicast MAC address for use with VTEP? If the MAC address is > > configurable in BFD command, this can be moot. > > > > Dinesh > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > > > > wrote: > > > > I have cross checked point raised about MAC address usage. It is > > possible that tenant could be using physical MAC address and when a > > packet comes with valid VNI with a MAC address that is being used by > > tenant then packet will be sent to that tenant. This rules out the > > fact that we could use physical MAC address as inner MAC to ensure > > packets get terminated at VTEP itself. > > > > Thanks > > Santosh P K > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > > > > > wrote: > > > > Joel, > > Thanks for your inputs. I checked implementation within > > Vmware. Perhaps I should have been more clear about MAC address > > space while checking internally. I will cross check again for > > the same and get back on this list. > > > > Thanks > > Santosh P K > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern > > > wrote: > > > > Sorry to ask a stupid question. Whose implementation? > > > > The reason I ask is that as far as I can tell, since the > > tenant does not > > have any control access to the VTEP, there is no reason for > > the VTEP to > > have a MAC address in the tenant space. Yes, the device has > > a physical > > MAC address. But the tenant could well be using that MAC > > address. Yes, > > they would be violating the Ethernet spec. But the whole > > point of > > segregation is not to care about such issues. > > > > On the other hand, if you tell me that the VMWare > > implementation has an > > Ethernet address that is part of the tenant space, well, > > they made up > > this particular game. > > > > Yours, > > Joel > > > > On 7/31/2019 1:44 PM, Santosh P K wrote: > > > I have checked with implementation in data path. When we > > receive a > > > packet with valid VNI then lookup for MAC will happen and > > it is VTEP own > > > MAC then it will be trapped to control plane for > > processing. I think we > > > can have following options > > > 1. Optional managment VNI > > > 2. Mandatory inner MAC set to VTEP mac > > > 3. Inner IP TTL set to 1 to avoid forwarding of packet > > via inner IP > > > address. > > > > > > > > > Thoughts? > > > > > > Thansk > > > Santosh P K > > > > > > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky > > > > > > >> wrote: > > > > > > Hi Dinesh, > > > thank you for your consideration of the proposal and > > questions. What > > > would you see as the scope of testing the > > connectivity for the > > > specific VNI? If it is tenant-to-tenant, then VTEPs > > will treat these > > > packets as regular user frames. More likely, these > > could be Layer 2 > > > OAM, e.g. CCM frames. The reason to use 127/8 for > > IPv4, and > > > 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to safeguard > > from leaking > > > Ethernet frames with BFD Control packet to a tenant. > > > You've suggested using a MAC address to trap the > > control packet at > > > VTEP. What that address could be? We had proposed > > using the > > > dedicated MAC and VTEP's MAC and both raised concerns > > among VXLAN > > > experts. The idea of using Management VNI may be more > > acceptable > > > based on its similarity to the practice of using > > Management VLAN. > > > > > > Regards, > > > Greg > > > > > > On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt > > > > > >> > > wrote: > > > > > > Hi Greg, > > > > > > As long as the inner MAC address is such that the > > packet is > > > trapped to the CPU, it should be fine for use as > > an inner MAC is > > > it not? Stating that is better than trying to > > force a management > > > VNI. What if someone wants to test connectivity > > on a specific > > > VNI? I would not pick a loopback IP address for > > this since that > > > address range is host/node local only. Is there a > > reason you're > > > not using the VTEP IP as the inner IP address ? > > > > > > Dinesh > > > > > > On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky > > > > > >> wrote: > > > > > > Dear All, > > > thank you for your comments, suggestions on > > this issue, > > > probably the most challenging for this > > specification. In the > > > course of our discussions, we've agreed to > > abandon the > > > request to allocate the dedicated MAC address > > to be used as > > > the destination MAC address in the inner > > Ethernet frame. > > > Also, earlier using VNI 0 was changed from > > mandatory to one > > > of the options an implementation may offer to > > an operator. > > > The most recent discussion was whether VTEP's > > MAC address > > > might be used as the destination MAC address > > in the inner > > > Ethernet frame. As I recall it, the comments > > from VXLAN > > > experts equally split with one for it and one > > against. Hence > > > I would like to propose a new text to resolve > > the issue. The > > > idea is to let an operator select Management > > VNI and use > > > that VNI in VXLAN encapsulation of BFD > > Control packets: > > > NEW TEXT: > > > > > > An operator MUST select a VNI number to > > be used as > > > Management VNI. VXLAN packet for > > Management VNI MUST NOT > > > be sent to a tenant. VNI number 1 is > > RECOMMENDED as the > > > default for Management VNI. > > > > > > With that new text, what can be the value of > > the destination > > > MAC in the inner Ethernet? I tend to believe > > that it can be > > > anything and ignored by the reciever VTEP. > > Also, if the > > > trapping is based on VNI number, the > > destination IP address > > > of the inner IP packet can from the range > > 127/8 for IPv4, > > > and for IPv6 from the range > > 0:0:0:0:0:FFFF:7F00:0/104. And > > > lastly, the TTL to be set to 1 (no change > here). > > > > > > Much appreciate your comments, questions, and > > suggestions. > > > > > > Best regards, > > > Greg > > > > > > --000000000000c2f1cd058f28a9f6 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj5Kb2VsLDwvZGl2PjxkaXY+PGJyPjwvZGl2PjxkaXY+WW91IHVu ZGVyc3Rvb2QgY29ycmVjdGx5LiA8YnI+PC9kaXY+PGRpdj48YnI+PC9kaXY+PGRpdj5UaGUgVk5J cyBtYXkgbm90IHNoYXJlIGZhdGUgZHVlIHRvIG1pc2NvbmZpZ3VyYXRpb24uIEFuZCBJIHN0cm9u Z2x5IHN1c3BlY3Qgc29tZW9uZSB3aWxsIHdhbnQgdG8gdXNlIEJGRCBmb3IgdGhhdCBiZWNhdXNl IGl0cyBhYm91dCBjaGVja2luZyBwYXRoIGNvbnRpbnVpdHkgYXMgc3RhdGVkIGJ5IHRoZSBkcmFm dC4gQXMgbG9uZyBhcyB0aGVyZSYjMzk7cyBhIHZhbGlkIElQIChiZWNhdXNlIGl0JiMzOTtzIEJG RCkgb3duZWQgYnkgdGhlIFZURVAgaW4gdGhhdCBWTkksIHlvdSBjYW4gdXNlIEJGRCBpbiB0aGF0 IFZOSS4gVGhhdHMgYWxsIHRoYXQgeW91IG5lZWQgdG8gZGljdGF0ZS7CoCBUaGF0IElQIGFkZHJl c3MgaGFzIGEgTUFDIGFkZHJlc3MgYW5kIHlvdSBjYW4gdXNlIHRoYXQgb24gdGhlIGlubmVyIGZy 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(PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=UpCGH6Q1CELB09CkBKKGYLowvCj5SRgKdUmxuNFEZ44=; b=JBAf9OjQmjbO2YRc9uaRjTeb7EQ1zZNU79tiEfBedrSSfSNFmZEAZ9y17YG6N2qRcw O6n8V2DxCcls4Id8UIXBQOVZRGHA3gaZdlV935J3WaTS6G6LAoCMrzU3DKyHy9Naxxqc VYVT7KBvY31CyD95CADTF/lfbfOjxZkMITS2Otiod8li5tUieKT4V4cOKQCq3j20YFXt YTeDgPg1FZm29JUSSL153l5IuOJ7mODMBs+BU+RmTKQpEJb/BcWoUFabC6+X0p5nMNLc hmxiN23jiOCPT3Q9f11gpMgirFLZEIJqVrHG06yWXJVbtNt8j7B4DNGGZPWChRdmNrDS tzdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=UpCGH6Q1CELB09CkBKKGYLowvCj5SRgKdUmxuNFEZ44=; b=hQwOgjNK9AADK4vbvQ33rd6pNPWVZT06F35gfAo/+JAQQObIZKVpA2omm9DSwbNw1Z CLOKb1L/o5uiiEFIHSziztdbsZPSHsz8Aa5n9WBSwgz0Zn891VfALRDALyyL3wl0OEQZ h82avsLIwW6TaWCw3XaVYKowlVIBgO1JJagFn9Q4q/Nz4CpuhreI7ZiB3yY2Vwmj1Fvi JsBACcjelJos2y8+ewDrmXoAvqpLONqKQ7iFaxakkgi12SoFe3X5ZSxFAkvfiul9IjIC fmVf03rPnxFhfkvTY0G1TQe564gS07+WLB/SUNabyBZe4aLDlNgg8ki354zJt8APZ6DQ IqNQ== X-Gm-Message-State: APjAAAWP4kjjhJpjQDyub+UYrDWnjYk7ZA06tXzZiWsAjqnsz61XWkQj Bm7DjT4Z1Unvt+33229B501lq8tyWi8s0xnOvDM= X-Google-Smtp-Source: APXvYqy3N4UAi6SuV4ADEzXg6xsRvDNZOD25W2klBuLEgCrkqTnYFiz5T+Xx4ow1TRq3OOEcJiWqMWfUfaLKofygXNQ= X-Received: by 2002:adf:cf0d:: with SMTP id o13mr1709092wrj.291.1564785695903; Fri, 02 Aug 2019 15:41:35 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> In-Reply-To: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> From: Dinesh Dutt Date: Fri, 2 Aug 2019 15:41:23 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: "Joel M. Halpern" Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="0000000000008dd2f5058f2a0fee" Archived-At: X-Mailman-Approved-At: Fri, 02 Aug 2019 15:43:49 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Aug 2019 22:41:41 -0000 --0000000000008dd2f5058f2a0fee Content-Type: text/plain; charset="UTF-8" The assumption of an IP address within any VNI is suspect that way. What's special about a single VNI, the management VNI? The VTEP IP address does not belong in reality in any VNI. Dinesh On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern wrote: > Your response seems to miss two points: > > First, the problem you describe is not what the document says it is > solving. To the degree it discusses it at all, the document says " In > most cases, a single BFD session is sufficient for the given VTEP to > monitor the reachability of a remote VTEP, regardless of the number of > VNIs in common. " > > Second, you assume the existence of an IP address for a VTEP within a > VNI. As with the MAC address, the VTEP does not have an IP address > within the VNI. Some implementations may have created such a thing, but > the general construct, as defined to date, does not support such. > > In short, you are requiring a behavior that violates the architectural > structure of overlay / underlay separation, and common usage. And you > are doing so to support a use case that the working group has not > indicated in the document as important. > > Yours, > Joel > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: > > Joel, > > > > You understood correctly. > > > > The VNIs may not share fate due to misconfiguration. And I strongly > > suspect someone will want to use BFD for that because its about checking > > path continuity as stated by the draft. As long as there's a valid IP > > (because it's BFD) owned by the VTEP in that VNI, you can use BFD in > > that VNI. Thats all that you need to dictate. That IP address has a MAC > > address and you can use that on the inner frame. That is all normal > > VXLAN processing. The outer IP is always that of the VTEP. > > > > Dinesh > > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern > > wrote: > > > > If I am reading your various emails correctly Dinesh (and I may have > > missed something) you are trying to use the MAC address because you > > want > > to be able to send these BFD packets over arbitrary VNI to monitor > the > > VNI. That is not a requirement identified in the document. It is > not > > even a problem I understand, since all the VNI between an ingress and > > egress VTEP share fate. > > > > Yours, > > Joel > > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > > > Thanks for verifying this. On Linux and hardware routers that I'm > > aware > > > of (Cisco circa 2012 and Cumulus), the physical MAC address is > > reused > > > across the VNIs on the VTEP. Did you check on a non-VMW device? > > This is > > > more for my own curiosity. > > > > > > To address the general case, can we not define a well-known (or > > reserve > > > one) unicast MAC address for use with VTEP? If the MAC address is > > > configurable in BFD command, this can be moot. > > > > > > Dinesh > > > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > > > > > > > >> wrote: > > > > > > I have cross checked point raised about MAC address usage. It > is > > > possible that tenant could be using physical MAC address and > > when a > > > packet comes with valid VNI with a MAC address that is being > > used by > > > tenant then packet will be sent to that tenant. This rules > > out the > > > fact that we could use physical MAC address as inner MAC to > > ensure > > > packets get terminated at VTEP itself. > > > > > > Thanks > > > Santosh P K > > > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > > > > > > > >> > > > wrote: > > > > > > Joel, > > > Thanks for your inputs. I checked implementation > within > > > Vmware. Perhaps I should have been more clear about MAC > > address > > > space while checking internally. I will cross check again > for > > > the same and get back on this list. > > > > > > Thanks > > > Santosh P K > > > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern > > > > > >> wrote: > > > > > > Sorry to ask a stupid question. Whose implementation? > > > > > > The reason I ask is that as far as I can tell, since > the > > > tenant does not > > > have any control access to the VTEP, there is no > > reason for > > > the VTEP to > > > have a MAC address in the tenant space. Yes, the > > device has > > > a physical > > > MAC address. But the tenant could well be using that > MAC > > > address. Yes, > > > they would be violating the Ethernet spec. But the > whole > > > point of > > > segregation is not to care about such issues. > > > > > > On the other hand, if you tell me that the VMWare > > > implementation has an > > > Ethernet address that is part of the tenant space, > well, > > > they made up > > > this particular game. > > > > > > Yours, > > > Joel > > > > > > On 7/31/2019 1:44 PM, Santosh P K wrote: > > > > I have checked with implementation in data path. > > When we > > > receive a > > > > packet with valid VNI then lookup for MAC will > > happen and > > > it is VTEP own > > > > MAC then it will be trapped to control plane for > > > processing. I think we > > > > can have following options > > > > 1. Optional managment VNI > > > > 2. Mandatory inner MAC set to VTEP mac > > > > 3. Inner IP TTL set to 1 to avoid forwarding of > packet > > > via inner IP > > > > address. > > > > > > > > > > > > Thoughts? > > > > > > > > Thansk > > > > Santosh P K > > > > > > > > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky > > > > > > > > > > > > > > > >>> wrote: > > > > > > > > Hi Dinesh, > > > > thank you for your consideration of the > > proposal and > > > questions. What > > > > would you see as the scope of testing the > > > connectivity for the > > > > specific VNI? If it is tenant-to-tenant, then > > VTEPs > > > will treat these > > > > packets as regular user frames. More likely, > these > > > could be Layer 2 > > > > OAM, e.g. CCM frames. The reason to use 127/8 > for > > > IPv4, and > > > > 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is to > safeguard > > > from leaking > > > > Ethernet frames with BFD Control packet to a > > tenant. > > > > You've suggested using a MAC address to trap > the > > > control packet at > > > > VTEP. What that address could be? We had > proposed > > > using the > > > > dedicated MAC and VTEP's MAC and both raised > > concerns > > > among VXLAN > > > > experts. The idea of using Management VNI may > > be more > > > acceptable > > > > based on its similarity to the practice of > using > > > Management VLAN. > > > > > > > > Regards, > > > > Greg > > > > > > > > On Wed, Jul 31, 2019 at 12:03 PM Dinesh Dutt > > > > > > > > > > > > >>> > > > wrote: > > > > > > > > Hi Greg, > > > > > > > > As long as the inner MAC address is such > > that the > > > packet is > > > > trapped to the CPU, it should be fine for > > use as > > > an inner MAC is > > > > it not? Stating that is better than trying > to > > > force a management > > > > VNI. What if someone wants to test > > connectivity > > > on a specific > > > > VNI? I would not pick a loopback IP > > address for > > > this since that > > > > address range is host/node local only. Is > > there a > > > reason you're > > > > not using the VTEP IP as the inner IP > > address ? > > > > > > > > Dinesh > > > > > > > > On Wed, Jul 31, 2019 at 5:48 AM Greg Mirsky > > > > > > > > > > > > > > > >>> wrote: > > > > > > > > Dear All, > > > > thank you for your comments, > > suggestions on > > > this issue, > > > > probably the most challenging for this > > > specification. In the > > > > course of our discussions, we've > agreed to > > > abandon the > > > > request to allocate the dedicated MAC > > address > > > to be used as > > > > the destination MAC address in the > inner > > > Ethernet frame. > > > > Also, earlier using VNI 0 was changed > from > > > mandatory to one > > > > of the options an implementation may > > offer to > > > an operator. > > > > The most recent discussion was whether > > VTEP's > > > MAC address > > > > might be used as the destination MAC > > address > > > in the inner > > > > Ethernet frame. As I recall it, the > > comments > > > from VXLAN > > > > experts equally split with one for it > > and one > > > against. Hence > > > > I would like to propose a new text to > > resolve > > > the issue. The > > > > idea is to let an operator select > > Management > > > VNI and use > > > > that VNI in VXLAN encapsulation of BFD > > > Control packets: > > > > NEW TEXT: > > > > > > > > An operator MUST select a VNI > > number to > > > be used as > > > > Management VNI. VXLAN packet for > > > Management VNI MUST NOT > > > > be sent to a tenant. VNI number 1 > is > > > RECOMMENDED as the > > > > default for Management VNI. > > > > > > > > With that new text, what can be the > > value of > > > the destination > > > > MAC in the inner Ethernet? I tend to > > believe > > > that it can be > > > > anything and ignored by the reciever > VTEP. > > > Also, if the > > > > trapping is based on VNI number, the > > > destination IP address > > > > of the inner IP packet can from the > range > > > 127/8 for IPv4, > > > > and for IPv6 from the range > > > 0:0:0:0:0:FFFF:7F00:0/104. And > > > > lastly, the TTL to be set to 1 (no > > change here). > > > > > > > > Much appreciate your comments, > > questions, and > > > suggestions. > > > > > > > > Best regards, > > > > Greg > > > > > > > > > > --0000000000008dd2f5058f2a0fee Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj5UaGUgYXNzdW1wdGlvbiBvZiBhbiBJUCBhZGRyZXNzIHdpdGhp biBhbnkgVk5JIGlzIHN1c3BlY3QgdGhhdCB3YXkuIFdoYXQmIzM5O3Mgc3BlY2lhbCBhYm91dCBh IHNpbmdsZSBWTkksIHRoZSBtYW5hZ2VtZW50IFZOST8gVGhlIFZURVAgSVAgYWRkcmVzcyBkb2Vz IG5vdCBiZWxvbmcgaW4gcmVhbGl0eSBpbiBhbnkgVk5JLjxicj48L2Rpdj48ZGl2Pjxicj48L2Rp dj48ZGl2PkRpbmVzaDxicj4gPC9kaXY+PC9kaXY+PGJyPjxkaXYgY2xhc3M9ImdtYWlsX3F1b3Rl Ij48ZGl2IGRpcj0ibHRyIiBjbGFzcz0iZ21haWxfYXR0ciI+T24gRnJpLCBBdWcgMiwgMjAxOSBh dCAzOjE3IFBNIEpvZWwgTS4gSGFscGVybiAmbHQ7PGEgaHJlZj0ibWFpbHRvOmptaEBqb2VsaGFs cGVybi5jb20iPmptaEBqb2VsaGFscGVybi5jb208L2E+Jmd0OyB3cm90ZTo8YnI+PC9kaXY+PGJs 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IHJlZ2FyZHMsPGJyPg0KJmd0O8KgIMKgIMKgICZndDvCoCDCoCDCoCDCoCDCoCDCoCDCoCAmZ3Q7 wqAgwqAgwqAgwqAgwqAgwqAgwqBHcmVnPGJyPg0KJmd0O8KgIMKgIMKgICZndDvCoCDCoCDCoCDC oCDCoCDCoCDCoCAmZ3Q7PGJyPg0KJmd0O8KgIMKgIMKgICZndDs8YnI+DQomZ3Q7IDxicj4NCjwv YmxvY2txdW90ZT48L2Rpdj4NCg== --0000000000008dd2f5058f2a0fee-- From nobody Fri Aug 2 17:08:21 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C4900120024; Fri, 2 Aug 2019 17:08:18 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.701 X-Spam-Level: X-Spam-Status: No, score=-2.701 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=joelhalpern.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VDcRqtTYwrOT; Fri, 2 Aug 2019 17:08:16 -0700 (PDT) Received: from mailb1.tigertech.net (mailb1.tigertech.net [208.80.4.153]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8816B120018; Fri, 2 Aug 2019 17:08:16 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mailb1.tigertech.net (Postfix) with ESMTP id 460krc3Wl9z22jx5; Fri, 2 Aug 2019 17:08:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelhalpern.com; s=2.tigertech; t=1564790896; bh=DAnDLXEdxSL/vJwvKuj9Uots1hebSwckFTgZkzS0dYU=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=gw9ptor8Ga8MUPaLmg4AM3hkveoEzB8iE75+XVQ124fd3m6aFZ7fhmcDlXQtdZeDK cNhbEo8/BlJXbVjTj9yEGIdM3iZ1NwiQbMRsKuSu5avW8WR7QOLiVWkR0BOKPjW+Tg seVFneJSzu+FABti8b0tnYt4ZoMykG2mfTfbzgZI= X-Virus-Scanned: Debian amavisd-new at mailb1.tigertech.net Received: from [172.20.7.244] (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailb1.tigertech.net (Postfix) with ESMTPSA id 460krb0nQVz22jqv; Fri, 2 Aug 2019 17:08:15 -0700 (PDT) Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> From: "Joel M. Halpern" Message-ID: Date: Fri, 2 Aug 2019 20:08:13 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Aug 2019 00:08:19 -0000 What is special about the management VNI is precisely that it is NOT a tenant VNI. The VxLAN administration does know how it allocates VNI to tenants, and which VNI it has allocated. In contrast, it does not know which IP addresses or MAC adddresses teh tenant is using or may plan to use. Yours, Joel On 8/2/2019 6:41 PM, Dinesh Dutt wrote: > The assumption of an IP address within any VNI is suspect that way. > What's special about a single VNI, the management VNI? The VTEP IP > address does not belong in reality in any VNI. > > Dinesh > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern > wrote: > > Your response seems to miss two points: > > First, the problem you describe is not what the document says it is > solving.  To the degree it discusses it at all, the document says " >  In > most cases, a single BFD session is sufficient for the given VTEP to > monitor the reachability of a remote VTEP, regardless of the number of > VNIs in common. " > > Second, you assume the existence of an IP address for a VTEP within a > VNI.  As with the MAC address, the VTEP does not have an IP address > within the VNI.  Some implementations may have created such a thing, > but > the general construct, as defined to date, does not support such. > > In short, you are requiring a behavior that violates the architectural > structure of overlay / underlay separation, and common usage.  And you > are doing so to support a use case that the working group has not > indicated in the document as important. > > Yours, > Joel > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: > > Joel, > > > > You understood correctly. > > > > The VNIs may not share fate due to misconfiguration. And I strongly > > suspect someone will want to use BFD for that because its about > checking > > path continuity as stated by the draft. As long as there's a > valid IP > > (because it's BFD) owned by the VTEP in that VNI, you can use BFD in > > that VNI. Thats all that you need to dictate.  That IP address > has a MAC > > address and you can use that on the inner frame. That is all normal > > VXLAN processing. The outer IP is always that of the VTEP. > > > > Dinesh > > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern > > > >> wrote: > > > >     If I am reading your various emails correctly Dinesh (and I > may have > >     missed something) you are trying to use the MAC address > because you > >     want > >     to be able to send these BFD packets over arbitrary VNI to > monitor the > >     VNI.  That is not a requirement identified in the document. > It is not > >     even a problem I understand, since all the VNI between an > ingress and > >     egress VTEP share fate. > > > >     Yours, > >     Joel > > > >     On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > >      > Thanks for verifying this. On Linux and hardware routers > that I'm > >     aware > >      > of (Cisco circa 2012 and Cumulus), the physical MAC address is > >     reused > >      > across the VNIs on the VTEP. Did you check on a non-VMW > device? > >     This is > >      > more for my own curiosity. > >      > > >      > To address the general case, can we not define a > well-known (or > >     reserve > >      > one) unicast MAC address for use with VTEP? If the MAC > address is > >      > configurable in BFD command, this can be moot. > >      > > >      > Dinesh > >      > > >      > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > >      > > >      > > >      > >      >>> wrote: > >      > > >      >     I have cross checked point raised about MAC address > usage. It is > >      >     possible that tenant could be using physical MAC > address and > >     when a > >      >     packet comes with valid VNI with a MAC address that is > being > >     used by > >      >     tenant then packet will be sent to that tenant. This rules > >     out the > >      >     fact that we could use physical MAC address as inner > MAC to > >     ensure > >      >     packets get terminated at VTEP itself. > >      > > >      >     Thanks > >      >     Santosh P K > >      > > >      >     On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > >      >      > >      > > >      > >      >>> > >      >     wrote: > >      > > >      >         Joel, > >      >             Thanks for your inputs. I checked > implementation within > >      >         Vmware. Perhaps I should have been more clear > about MAC > >     address > >      >         space while checking internally. I will cross > check again for > >      >         the same and get back on this list. > >      > > >      >         Thanks > >      >         Santosh P K > >      > > >      >         On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern > >      >          > > > >      > >>> wrote: > >      > > >      >             Sorry to ask a stupid question.  Whose > implementation? > >      > > >      >             The reason I ask is that as far as I can tell, > since the > >      >             tenant does not > >      >             have any control access to the VTEP, there is no > >     reason for > >      >             the VTEP to > >      >             have a MAC address in the tenant space.  Yes, the > >     device has > >      >             a physical > >      >             MAC address.  But the tenant could well be > using that MAC > >      >             address.  Yes, > >      >             they would be violating the Ethernet spec. > But the whole > >      >             point of > >      >             segregation is not to care about such issues. > >      > > >      >             On the other hand, if you tell me that the VMWare > >      >             implementation has an > >      >             Ethernet address that is part of the tenant > space, well, > >      >             they made up > >      >             this particular game. > >      > > >      >             Yours, > >      >             Joel > >      > > >      >             On 7/31/2019 1:44 PM, Santosh P K wrote: > >      >              > I have checked with implementation in data > path. > >     When we > >      >             receive a > >      >              > packet with valid VNI then lookup for MAC will > >     happen and > >      >             it is VTEP own > >      >              > MAC then it will be trapped to control > plane for > >      >             processing. I think we > >      >              > can have following options > >      >              > 1. Optional managment VNI > >      >              > 2. Mandatory inner MAC set to VTEP mac > >      >              > 3. Inner IP TTL set to 1 to avoid > forwarding of packet > >      >             via inner IP > >      >              > address. > >      >              > > >      >              > > >      >              > Thoughts? > >      >              > > >      >              > Thansk > >      >              > Santosh P K > >      >              > > >      >              > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky > >      >              > > >      > >> > >      >              > > >     > > >      >              > >      >>>> wrote: > >      >              > > >      >              >     Hi Dinesh, > >      >              >     thank you for your consideration of the > >     proposal and > >      >             questions. What > >      >              >     would you see as the scope of testing the > >      >             connectivity for the > >      >              >     specific VNI? If it is > tenant-to-tenant, then > >     VTEPs > >      >             will treat these > >      >              >     packets as regular user frames. More > likely, these > >      >             could be Layer 2 > >      >              >     OAM, e.g. CCM frames. The reason to use > 127/8 for > >      >             IPv4, and > >      >              >     0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is > to safeguard > >      >             from leaking > >      >              >     Ethernet frames with BFD Control packet > to a > >     tenant. > >      >              >     You've suggested using a MAC address to > trap the > >      >             control packet at > >      >              >     VTEP. What that address could be? We > had proposed > >      >             using the > >      >              >     dedicated MAC and VTEP's MAC and both > raised > >     concerns > >      >             among VXLAN > >      >              >     experts. The idea of using Management > VNI may > >     be more > >      >             acceptable > >      >              >     based on its similarity to the practice > of using > >      >             Management VLAN. > >      >              > > >      >              >     Regards, > >      >              >     Greg > >      >              > > >      >              >     On Wed, Jul 31, 2019 at 12:03 PM Dinesh > Dutt > >      >              > > > >      > >> > >      >              >      > >     > > > >     >>>> > >      >             wrote: > >      >              > > >      >              >         Hi Greg, > >      >              > > >      >              >         As long as the inner MAC address is > such > >     that the > >      >             packet is > >      >              >         trapped to the CPU, it should be > fine for > >     use as > >      >             an inner MAC is > >      >              >         it not? Stating that is better than > trying to > >      >             force a management > >      >              >         VNI. What if someone wants to test > >     connectivity > >      >             on a specific > >      >              >         VNI? I would not pick a loopback IP > >     address for > >      >             this since that > >      >              >         address range is host/node local > only. Is > >     there a > >      >             reason you're > >      >              >         not using the VTEP IP as the inner IP > >     address ? > >      >              > > >      >              >         Dinesh > >      >              > > >      >              >         On Wed, Jul 31, 2019 at 5:48 AM > Greg Mirsky > >      >              >          > >     > > >      >              > >      >> > >     > > >      >              > >      >>>> wrote: > >      >              > > >      >              >             Dear All, > >      >              >             thank you for your comments, > >     suggestions on > >      >             this issue, > >      >              >             probably the most challenging > for this > >      >             specification. In the > >      >              >             course of our discussions, > we've agreed to > >      >             abandon the > >      >              >             request to allocate the > dedicated MAC > >     address > >      >             to be used as > >      >              >             the destination MAC address in > the inner > >      >             Ethernet frame. > >      >              >             Also, earlier using VNI 0 was > changed from > >      >             mandatory to one > >      >              >             of the options an > implementation may > >     offer to > >      >             an operator. > >      >              >             The most recent discussion was > whether > >     VTEP's > >      >             MAC address > >      >              >             might be used as the > destination MAC > >     address > >      >             in the inner > >      >              >             Ethernet frame. As I recall it, the > >     comments > >      >             from VXLAN > >      >              >             experts equally split with one > for it > >     and one > >      >             against. Hence > >      >              >             I would like to propose a new > text to > >     resolve > >      >             the issue. The > >      >              >             idea is to let an operator select > >     Management > >      >             VNI and use > >      >              >             that VNI in VXLAN encapsulation > of BFD > >      >             Control packets: > >      >              >             NEW TEXT: > >      >              > > >      >              >                 An operator MUST select a VNI > >     number to > >      >             be used as > >      >              >                 Management VNI. VXLAN > packet for > >      >             Management VNI MUST NOT > >      >              >                 be sent to a tenant. VNI > number 1 is > >      >             RECOMMENDED as the > >      >              >                 default for Management VNI. > >      >              > > >      >              >             With that new text, what can be the > >     value of > >      >             the destination > >      >              >             MAC in the inner Ethernet? I > tend to > >     believe > >      >             that it can be > >      >              >             anything and ignored by the > reciever VTEP. > >      >             Also, if the > >      >              >             trapping is based on VNI > number, the > >      >             destination IP address > >      >              >             of the inner IP packet can from > the range > >      >             127/8 for IPv4, > >      >              >             and for IPv6 from the range > >      >             0:0:0:0:0:FFFF:7F00:0/104. And > >      >              >             lastly, the TTL to be set to 1 (no > >     change here). > >      >              > > >      >              >             Much appreciate your comments, > >     questions, and > >      >             suggestions. > >      >              > > >      >              >             Best regards, > >      >              >             Greg > >      >              > > >      > > > > From nobody Fri Aug 2 17:54:56 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C9B17120024; Fri, 2 Aug 2019 17:54:53 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.7 X-Spam-Level: X-Spam-Status: No, score=-2.7 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=joelhalpern.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FGXmh7g6mAFi; Fri, 2 Aug 2019 17:54:50 -0700 (PDT) Received: from mailb1.tigertech.net (mailb1.tigertech.net [208.80.4.153]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B374E12001E; Fri, 2 Aug 2019 17:54:50 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mailb1.tigertech.net (Postfix) with ESMTP id 460lWq6fZNz22jvD; Fri, 2 Aug 2019 17:38:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelhalpern.com; s=2.tigertech; t=1564792727; bh=2Wqd3TShyleUxawDdsdguuB7B/+KfcznCh1T/w1gcQc=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=qy5OiQB5NjD0LbsonQanlg/GTLqm/v2nvwyGxzYJqQoqL+nhw7AISmZomZAiBmgNx 7NWxmfX0rD1EYi40QR+Rn4k+WI9XiS8Ud95iiRK8RYLA9b6FPSQbtWEquOI5nJw30c stguFmGjPIpGrlQl/Uk60tJBkaOjOUr+qF6m2viM= X-Virus-Scanned: Debian amavisd-new at mailb1.tigertech.net Received: from [172.20.7.244] (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailb1.tigertech.net (Postfix) with ESMTPSA id 460lWp4Jn9z22jqv; Fri, 2 Aug 2019 17:38:46 -0700 (PDT) Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> From: "Joel M. Halpern" Message-ID: <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> Date: Fri, 2 Aug 2019 20:38:45 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Aug 2019 00:54:54 -0000 I am going by what the draft says its purpose is. If you (Dinesh) want the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft. As currently written, the behavior Greg proposed meets the needs, and does so in a way that is consistent with VxLAN. Yours, Joel On 8/2/2019 8:30 PM, Dinesh Dutt wrote: > What is the stated purpose of this BFD session? The VTEP reachability is > determined by the underlay, I don't need VXLAN-encaped packet for that. > Do we agree? > > If I want to test the VXLAN encap/decap functionality alone, picking any > single VNI maybe fine. But is this all any network operator wants? Why? > In what situations has this been a problem? I suspect operators also > want to verify path continuity over a specific VNI. If you say this is > not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs > (see section 3). More importantly, this is a real problem that operators > like to verify. > > Dinesh > > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern > wrote: > > What is special about the management VNI is precisely that it is NOT a > tenant VNI.  The VxLAN administration does know how it allocates VNI to > tenants, and which VNI it has allocated.  In contrast, it does not know > which IP addresses or MAC adddresses teh tenant is using or may plan > to use. > > Yours, > Joel > > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: > > The assumption of an IP address within any VNI is suspect that way. > > What's special about a single VNI, the management VNI? The VTEP IP > > address does not belong in reality in any VNI. > > > > Dinesh > > > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern > > > >> wrote: > > > >     Your response seems to miss two points: > > > >     First, the problem you describe is not what the document says > it is > >     solving.  To the degree it discusses it at all, the document > says " > >       In > >     most cases, a single BFD session is sufficient for the given > VTEP to > >     monitor the reachability of a remote VTEP, regardless of the > number of > >     VNIs in common. " > > > >     Second, you assume the existence of an IP address for a VTEP > within a > >     VNI.  As with the MAC address, the VTEP does not have an IP > address > >     within the VNI.  Some implementations may have created such a > thing, > >     but > >     the general construct, as defined to date, does not support such. > > > >     In short, you are requiring a behavior that violates the > architectural > >     structure of overlay / underlay separation, and common > usage.  And you > >     are doing so to support a use case that the working group has not > >     indicated in the document as important. > > > >     Yours, > >     Joel > > > >     On 8/2/2019 5:01 PM, Dinesh Dutt wrote: > >      > Joel, > >      > > >      > You understood correctly. > >      > > >      > The VNIs may not share fate due to misconfiguration. And I > strongly > >      > suspect someone will want to use BFD for that because its > about > >     checking > >      > path continuity as stated by the draft. As long as there's a > >     valid IP > >      > (because it's BFD) owned by the VTEP in that VNI, you can > use BFD in > >      > that VNI. Thats all that you need to dictate.  That IP address > >     has a MAC > >      > address and you can use that on the inner frame. That is > all normal > >      > VXLAN processing. The outer IP is always that of the VTEP. > >      > > >      > Dinesh > >      > > >      > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern > >      > > > >      > > >>> wrote: > >      > > >      >     If I am reading your various emails correctly Dinesh > (and I > >     may have > >      >     missed something) you are trying to use the MAC address > >     because you > >      >     want > >      >     to be able to send these BFD packets over arbitrary VNI to > >     monitor the > >      >     VNI.  That is not a requirement identified in the > document. > >     It is not > >      >     even a problem I understand, since all the VNI between an > >     ingress and > >      >     egress VTEP share fate. > >      > > >      >     Yours, > >      >     Joel > >      > > >      >     On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > >      >      > Thanks for verifying this. On Linux and hardware > routers > >     that I'm > >      >     aware > >      >      > of (Cisco circa 2012 and Cumulus), the physical MAC > address is > >      >     reused > >      >      > across the VNIs on the VTEP. Did you check on a non-VMW > >     device? > >      >     This is > >      >      > more for my own curiosity. > >      >      > > >      >      > To address the general case, can we not define a > >     well-known (or > >      >     reserve > >      >      > one) unicast MAC address for use with VTEP? If the MAC > >     address is > >      >      > configurable in BFD command, this can be moot. > >      >      > > >      >      > Dinesh > >      >      > > >      >      > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > >      >      > > >      > > >      >      > >      >> > >      >      > >      > > >      >      > >      >>>> wrote: > >      >      > > >      >      >     I have cross checked point raised about MAC address > >     usage. It is > >      >      >     possible that tenant could be using physical MAC > >     address and > >      >     when a > >      >      >     packet comes with valid VNI with a MAC address > that is > >     being > >      >     used by > >      >      >     tenant then packet will be sent to that tenant. > This rules > >      >     out the > >      >      >     fact that we could use physical MAC address as > inner > >     MAC to > >      >     ensure > >      >      >     packets get terminated at VTEP itself. > >      >      > > >      >      >     Thanks > >      >      >     Santosh P K > >      >      > > >      >      >     On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > >      >      >      > >      > > >      >      > >      >> > >      >      > >      > > >      >      > >      >>>> > >      >      >     wrote: > >      >      > > >      >      >         Joel, > >      >      >             Thanks for your inputs. I checked > >     implementation within > >      >      >         Vmware. Perhaps I should have been more clear > >     about MAC > >      >     address > >      >      >         space while checking internally. I will cross > >     check again for > >      >      >         the same and get back on this list. > >      >      > > >      >      >         Thanks > >      >      >         Santosh P K > >      >      > > >      >      >         On Wed, Jul 31, 2019 at 10:54 AM Joel M. > Halpern > >      >      >          > > >      > >> > >      >      > > >      > >>>> wrote: > >      >      > > >      >      >             Sorry to ask a stupid question.  Whose > >     implementation? > >      >      > > >      >      >             The reason I ask is that as far as I > can tell, > >     since the > >      >      >             tenant does not > >      >      >             have any control access to the VTEP, > there is no > >      >     reason for > >      >      >             the VTEP to > >      >      >             have a MAC address in the tenant > space.  Yes, the > >      >     device has > >      >      >             a physical > >      >      >             MAC address.  But the tenant could well be > >     using that MAC > >      >      >             address.  Yes, > >      >      >             they would be violating the Ethernet spec. > >     But the whole > >      >      >             point of > >      >      >             segregation is not to care about such > issues. > >      >      > > >      >      >             On the other hand, if you tell me that > the VMWare > >      >      >             implementation has an > >      >      >             Ethernet address that is part of the tenant > >     space, well, > >      >      >             they made up > >      >      >             this particular game. > >      >      > > >      >      >             Yours, > >      >      >             Joel > >      >      > > >      >      >             On 7/31/2019 1:44 PM, Santosh P K wrote: > >      >      >              > I have checked with implementation > in data > >     path. > >      >     When we > >      >      >             receive a > >      >      >              > packet with valid VNI then lookup > for MAC will > >      >     happen and > >      >      >             it is VTEP own > >      >      >              > MAC then it will be trapped to control > >     plane for > >      >      >             processing. I think we > >      >      >              > can have following options > >      >      >              > 1. Optional managment VNI > >      >      >              > 2. Mandatory inner MAC set to VTEP mac > >      >      >              > 3. Inner IP TTL set to 1 to avoid > >     forwarding of packet > >      >      >             via inner IP > >      >      >              > address. > >      >      >              > > >      >      >              > > >      >      >              > Thoughts? > >      >      >              > > >      >      >              > Thansk > >      >      >              > Santosh P K > >      >      >              > > >      >      >              > On Wed, Jul 31, 2019 at 9:20 AM Greg > Mirsky > >      >      >              > >     > > > >     >> > >      >      > > >      > >>> > >      >      >              > > >     > > >      >      >> > >      >      >              > >     > > >      >      > >      >>>>> wrote: > >      >      >              > > >      >      >              >     Hi Dinesh, > >      >      >              >     thank you for your consideration > of the > >      >     proposal and > >      >      >             questions. What > >      >      >              >     would you see as the scope of > testing the > >      >      >             connectivity for the > >      >      >              >     specific VNI? If it is > >     tenant-to-tenant, then > >      >     VTEPs > >      >      >             will treat these > >      >      >              >     packets as regular user frames. More > >     likely, these > >      >      >             could be Layer 2 > >      >      >              >     OAM, e.g. CCM frames. The reason > to use > >     127/8 for > >      >      >             IPv4, and > >      >      >              >     0:0:0:0:0:FFFF:7F00:0/104 for > IPv6 is > >     to safeguard > >      >      >             from leaking > >      >      >              >     Ethernet frames with BFD Control > packet > >     to a > >      >     tenant. > >      >      >              >     You've suggested using a MAC > address to > >     trap the > >      >      >             control packet at > >      >      >              >     VTEP. What that address could be? We > >     had proposed > >      >      >             using the > >      >      >              >     dedicated MAC and VTEP's MAC and > both > >     raised > >      >     concerns > >      >      >             among VXLAN > >      >      >              >     experts. The idea of using > Management > >     VNI may > >      >     be more > >      >      >             acceptable > >      >      >              >     based on its similarity to the > practice > >     of using > >      >      >             Management VLAN. > >      >      >              > > >      >      >              >     Regards, > >      >      >              >     Greg > >      >      >              > > >      >      >              >     On Wed, Jul 31, 2019 at 12:03 PM > Dinesh > >     Dutt > >      >      >              > > >      > >> > >      >      > > > >      > >>> > >      >      >              >      > >     > > >      >      > >> > >      > > > >      >      > >>>>> > >      >      >             wrote: > >      >      >              > > >      >      >              >         Hi Greg, > >      >      >              > > >      >      >              >         As long as the inner MAC > address is > >     such > >      >     that the > >      >      >             packet is > >      >      >              >         trapped to the CPU, it should be > >     fine for > >      >     use as > >      >      >             an inner MAC is > >      >      >              >         it not? Stating that is > better than > >     trying to > >      >      >             force a management > >      >      >              >         VNI. What if someone wants > to test > >      >     connectivity > >      >      >             on a specific > >      >      >              >         VNI? I would not pick a > loopback IP > >      >     address for > >      >      >             this since that > >      >      >              >         address range is host/node local > >     only. Is > >      >     there a > >      >      >             reason you're > >      >      >              >         not using the VTEP IP as the > inner IP > >      >     address ? > >      >      >              > > >      >      >              >         Dinesh > >      >      >              > > >      >      >              >         On Wed, Jul 31, 2019 at 5:48 AM > >     Greg Mirsky > >      >      >              >          > >     > > >      >      >> > >      >      >              > >     > > >      >      > >      >>> > >     > > >      >      >> > >      >      >              > >     > > >      >      > >      >>>>> wrote: > >      >      >              > > >      >      >              >             Dear All, > >      >      >              >             thank you for your comments, > >      >     suggestions on > >      >      >             this issue, > >      >      >              >             probably the most > challenging > >     for this > >      >      >             specification. In the > >      >      >              >             course of our discussions, > >     we've agreed to > >      >      >             abandon the > >      >      >              >             request to allocate the > >     dedicated MAC > >      >     address > >      >      >             to be used as > >      >      >              >             the destination MAC > address in > >     the inner > >      >      >             Ethernet frame. > >      >      >              >             Also, earlier using VNI > 0 was > >     changed from > >      >      >             mandatory to one > >      >      >              >             of the options an > >     implementation may > >      >     offer to > >      >      >             an operator. > >      >      >              >             The most recent > discussion was > >     whether > >      >     VTEP's > >      >      >             MAC address > >      >      >              >             might be used as the > >     destination MAC > >      >     address > >      >      >             in the inner > >      >      >              >             Ethernet frame. As I > recall it, the > >      >     comments > >      >      >             from VXLAN > >      >      >              >             experts equally split > with one > >     for it > >      >     and one > >      >      >             against. Hence > >      >      >              >             I would like to propose > a new > >     text to > >      >     resolve > >      >      >             the issue. The > >      >      >              >             idea is to let an > operator select > >      >     Management > >      >      >             VNI and use > >      >      >              >             that VNI in VXLAN > encapsulation > >     of BFD > >      >      >             Control packets: > >      >      >              >             NEW TEXT: > >      >      >              > > >      >      >              >                 An operator MUST > select a VNI > >      >     number to > >      >      >             be used as > >      >      >              >                 Management VNI. VXLAN > >     packet for > >      >      >             Management VNI MUST NOT > >      >      >              >                 be sent to a tenant. VNI > >     number 1 is > >      >      >             RECOMMENDED as the > >      >      >              >                 default for > Management VNI. > >      >      >              > > >      >      >              >             With that new text, what > can be the > >      >     value of > >      >      >             the destination > >      >      >              >             MAC in the inner Ethernet? I > >     tend to > >      >     believe > >      >      >             that it can be > >      >      >              >             anything and ignored by the > >     reciever VTEP. > >      >      >             Also, if the > >      >      >              >             trapping is based on VNI > >     number, the > >      >      >             destination IP address > >      >      >              >             of the inner IP packet > can from > >     the range > >      >      >             127/8 for IPv4, > >      >      >              >             and for IPv6 from the range > >      >      >             0:0:0:0:0:FFFF:7F00:0/104. And > >      >      >              >             lastly, the TTL to be > set to 1 (no > >      >     change here). > >      >      >              > > >      >      >              >             Much appreciate your > comments, > >      >     questions, and > >      >      >             suggestions. > >      >      >              > > >      >      >              >             Best regards, > >      >      >              >             Greg > >      >      >              > > >      >      > > >      > > > > From nobody Sat Aug 3 10:13:33 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 20A87120024; Fri, 2 Aug 2019 17:56:03 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cnXjCt0TzLuI; Fri, 2 Aug 2019 17:55:58 -0700 (PDT) Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3AFCB120046; Fri, 2 Aug 2019 17:55:58 -0700 (PDT) Received: by mail-wm1-x343.google.com with SMTP id v15so69527509wml.0; Fri, 02 Aug 2019 17:55:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=AazQVK2oBD2iGIYFuwnqy/eZwdLjgYzTEf4mh7cTqnw=; b=n6ed7w9lmipyA5T8y/jfzhyoAkm35FLsJvaU3hya4tLQcgZ7OhYcbWPEgOq0SeDrVQ zUhwfZIii4TMowqSI5lvWouCvQ0hL4t3p+Usfpif0Vt9v4pbZBlMzq3r5yKSzZM9rE7T QNAwZ8c84KOd8Y/fdBNxbLMpYgbhJM+pL3/V+ceDzXnRxo9b3E4FQ1supTFnB1fY5Ewx zPSTqEpkmBbFbKzBkMgF5aWnaZOT+pq2lBO/Y+VkPaWoO3RRzHVVc1GtZvDVOuAxidzV hynaPGNRdWA1xIApGSK8ts8oQpead+PSMVr+aCpbDCLjRQnZmMbOS9QkfhTEbFVtwje5 sO4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=AazQVK2oBD2iGIYFuwnqy/eZwdLjgYzTEf4mh7cTqnw=; b=kdRFwkeaPUoTO3a6kv7WjjC2BuQjTCe1F79cWrVKLHjrXuII4diHKRmF1QLpNeTsoy 2JbSxoo/E0nKUDrf5dseFVWrMx0GVF9CWI1F59Pn22Kjqg+Qkh3qzoy16uS0YeGnv7Jf KeZ0x0cee2StzOujQfYu434UE+UoL8P4BOctGufNFnhaRKTOrQGCDa/O++dWuBl9Hrd6 +STAKGpE3Qug6PuEYHvtNTeUlD+Sv9RpYtjzOybBSOti/txM3B7/Eq3abLwQgu6hkgBc ++kz2YiZahIdIX1WlV5UUPdAAkdg7TFbUyQS7NwboP7BiKC6+Uf0/dARlEqnS30bVcaE y7qg== X-Gm-Message-State: APjAAAVgKOgwVeQ3HTvnVvoY+GoWSMY7lBAl9So9MWif7qNCu4SlkkWl jHHMU+hfCZszc/XkbPw/9eYPrLkmUavhXoy9msUlZ9fh X-Google-Smtp-Source: APXvYqzkkya5ckjn9z6wrkzg8dGkrBNuCdCgm8a5d047KDROY+VOTyBMnTz3nZodJydaEwd8dHEGNJenM5lVDwiEouY= X-Received: by 2002:a1c:a5c2:: with SMTP id o185mr6081096wme.172.1564792239256; Fri, 02 Aug 2019 17:30:39 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> In-Reply-To: From: Dinesh Dutt Date: Fri, 2 Aug 2019 17:30:27 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: "Joel M. Halpern" Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000917b65058f2b95f8" Archived-At: X-Mailman-Approved-At: Sat, 03 Aug 2019 10:13:29 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Aug 2019 00:56:03 -0000 --000000000000917b65058f2b95f8 Content-Type: text/plain; charset="UTF-8" What is the stated purpose of this BFD session? The VTEP reachability is determined by the underlay, I don't need VXLAN-encaped packet for that. Do we agree? If I want to test the VXLAN encap/decap functionality alone, picking any single VNI maybe fine. But is this all any network operator wants? Why? In what situations has this been a problem? I suspect operators also want to verify path continuity over a specific VNI. If you say this is not defined by the document, I disagree because the current version talks about controlling the number of BFD sessions between the VTEPs (see section 3). More importantly, this is a real problem that operators like to verify. Dinesh On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern wrote: > What is special about the management VNI is precisely that it is NOT a > tenant VNI. The VxLAN administration does know how it allocates VNI to > tenants, and which VNI it has allocated. In contrast, it does not know > which IP addresses or MAC adddresses teh tenant is using or may plan to > use. > > Yours, > Joel > > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: > > The assumption of an IP address within any VNI is suspect that way. > > What's special about a single VNI, the management VNI? The VTEP IP > > address does not belong in reality in any VNI. > > > > Dinesh > > > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern > > wrote: > > > > Your response seems to miss two points: > > > > First, the problem you describe is not what the document says it is > > solving. To the degree it discusses it at all, the document says " > > In > > most cases, a single BFD session is sufficient for the given VTEP to > > monitor the reachability of a remote VTEP, regardless of the number > of > > VNIs in common. " > > > > Second, you assume the existence of an IP address for a VTEP within a > > VNI. As with the MAC address, the VTEP does not have an IP address > > within the VNI. Some implementations may have created such a thing, > > but > > the general construct, as defined to date, does not support such. > > > > In short, you are requiring a behavior that violates the > architectural > > structure of overlay / underlay separation, and common usage. And > you > > are doing so to support a use case that the working group has not > > indicated in the document as important. > > > > Yours, > > Joel > > > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: > > > Joel, > > > > > > You understood correctly. > > > > > > The VNIs may not share fate due to misconfiguration. And I > strongly > > > suspect someone will want to use BFD for that because its about > > checking > > > path continuity as stated by the draft. As long as there's a > > valid IP > > > (because it's BFD) owned by the VTEP in that VNI, you can use BFD > in > > > that VNI. Thats all that you need to dictate. That IP address > > has a MAC > > > address and you can use that on the inner frame. That is all > normal > > > VXLAN processing. The outer IP is always that of the VTEP. > > > > > > Dinesh > > > > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern > > > > > >> wrote: > > > > > > If I am reading your various emails correctly Dinesh (and I > > may have > > > missed something) you are trying to use the MAC address > > because you > > > want > > > to be able to send these BFD packets over arbitrary VNI to > > monitor the > > > VNI. That is not a requirement identified in the document. > > It is not > > > even a problem I understand, since all the VNI between an > > ingress and > > > egress VTEP share fate. > > > > > > Yours, > > > Joel > > > > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > > > > Thanks for verifying this. On Linux and hardware routers > > that I'm > > > aware > > > > of (Cisco circa 2012 and Cumulus), the physical MAC > address is > > > reused > > > > across the VNIs on the VTEP. Did you check on a non-VMW > > device? > > > This is > > > > more for my own curiosity. > > > > > > > > To address the general case, can we not define a > > well-known (or > > > reserve > > > > one) unicast MAC address for use with VTEP? If the MAC > > address is > > > > configurable in BFD command, this can be moot. > > > > > > > > Dinesh > > > > > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > > > > > > > > > > > > > > > > > > >>> wrote: > > > > > > > > I have cross checked point raised about MAC address > > usage. It is > > > > possible that tenant could be using physical MAC > > address and > > > when a > > > > packet comes with valid VNI with a MAC address that is > > being > > > used by > > > > tenant then packet will be sent to that tenant. This > rules > > > out the > > > > fact that we could use physical MAC address as inner > > MAC to > > > ensure > > > > packets get terminated at VTEP itself. > > > > > > > > Thanks > > > > Santosh P K > > > > > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > > > > > > > > > > > > > > > > > > >>> > > > > wrote: > > > > > > > > Joel, > > > > Thanks for your inputs. I checked > > implementation within > > > > Vmware. Perhaps I should have been more clear > > about MAC > > > address > > > > space while checking internally. I will cross > > check again for > > > > the same and get back on this list. > > > > > > > > Thanks > > > > Santosh P K > > > > > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. Halpern > > > > > > > > > > > > >>> wrote: > > > > > > > > Sorry to ask a stupid question. Whose > > implementation? > > > > > > > > The reason I ask is that as far as I can tell, > > since the > > > > tenant does not > > > > have any control access to the VTEP, there is > no > > > reason for > > > > the VTEP to > > > > have a MAC address in the tenant space. Yes, > the > > > device has > > > > a physical > > > > MAC address. But the tenant could well be > > using that MAC > > > > address. Yes, > > > > they would be violating the Ethernet spec. > > But the whole > > > > point of > > > > segregation is not to care about such issues. > > > > > > > > On the other hand, if you tell me that the > VMWare > > > > implementation has an > > > > Ethernet address that is part of the tenant > > space, well, > > > > they made up > > > > this particular game. > > > > > > > > Yours, > > > > Joel > > > > > > > > On 7/31/2019 1:44 PM, Santosh P K wrote: > > > > > I have checked with implementation in data > > path. > > > When we > > > > receive a > > > > > packet with valid VNI then lookup for MAC > will > > > happen and > > > > it is VTEP own > > > > > MAC then it will be trapped to control > > plane for > > > > processing. I think we > > > > > can have following options > > > > > 1. Optional managment VNI > > > > > 2. Mandatory inner MAC set to VTEP mac > > > > > 3. Inner IP TTL set to 1 to avoid > > forwarding of packet > > > > via inner IP > > > > > address. > > > > > > > > > > > > > > > Thoughts? > > > > > > > > > > Thansk > > > > > Santosh P K > > > > > > > > > > On Wed, Jul 31, 2019 at 9:20 AM Greg Mirsky > > > > > > > > > > > > >> > > > > > > > > > > > > > > > > > > > >>>> wrote: > > > > > > > > > > Hi Dinesh, > > > > > thank you for your consideration of the > > > proposal and > > > > questions. What > > > > > would you see as the scope of testing > the > > > > connectivity for the > > > > > specific VNI? If it is > > tenant-to-tenant, then > > > VTEPs > > > > will treat these > > > > > packets as regular user frames. More > > likely, these > > > > could be Layer 2 > > > > > OAM, e.g. CCM frames. The reason to use > > 127/8 for > > > > IPv4, and > > > > > 0:0:0:0:0:FFFF:7F00:0/104 for IPv6 is > > to safeguard > > > > from leaking > > > > > Ethernet frames with BFD Control packet > > to a > > > tenant. > > > > > You've suggested using a MAC address to > > trap the > > > > control packet at > > > > > VTEP. What that address could be? We > > had proposed > > > > using the > > > > > dedicated MAC and VTEP's MAC and both > > raised > > > concerns > > > > among VXLAN > > > > > experts. The idea of using Management > > VNI may > > > be more > > > > acceptable > > > > > based on its similarity to the practice > > of using > > > > Management VLAN. > > > > > > > > > > Regards, > > > > > Greg > > > > > > > > > > On Wed, Jul 31, 2019 at 12:03 PM Dinesh > > Dutt > > > > > > > > > > > > >> > > > > > > > > > > > > > > > >>>> > > > > wrote: > > > > > > > > > > Hi Greg, > > > > > > > > > > As long as the inner MAC address is > > such > > > that the > > > > packet is > > > > > trapped to the CPU, it should be > > fine for > > > use as > > > > an inner MAC is > > > > > it not? Stating that is better than > > trying to > > > > force a management > > > > > VNI. What if someone wants to test > > > connectivity > > > > on a specific > > > > > VNI? I would not pick a loopback IP > > > address for > > > > this since that > > > > > address range is host/node local > > only. Is > > > there a > > > > reason you're > > > > > not using the VTEP IP as the inner > IP > > > address ? > > > > > > > > > > Dinesh > > > > > > > > > > On Wed, Jul 31, 2019 at 5:48 AM > > Greg Mirsky > > > > > > > > > > > > > > > > > > > >> > > > > > > > > > > > > > > >>>> wrote: > > > > > > > > > > Dear All, > > > > > thank you for your comments, > > > suggestions on > > > > this issue, > > > > > probably the most challenging > > for this > > > > specification. In the > > > > > course of our discussions, > > we've agreed to > > > > abandon the > > > > > request to allocate the > > dedicated MAC > > > address > > > > to be used as > > > > > the destination MAC address in > > the inner > > > > Ethernet frame. > > > > > Also, earlier using VNI 0 was > > changed from > > > > mandatory to one > > > > > of the options an > > implementation may > > > offer to > > > > an operator. > > > > > The most recent discussion was > > whether > > > VTEP's > > > > MAC address > > > > > might be used as the > > destination MAC > > > address > > > > in the inner > > > > > Ethernet frame. As I recall it, > the > > > comments > > > > from VXLAN > > > > > experts equally split with one > > for it > > > and one > > > > against. Hence > > > > > I would like to propose a new > > text to > > > resolve > > > > the issue. The > > > > > idea is to let an operator > select > > > Management > > > > VNI and use > > > > > that VNI in VXLAN encapsulation > > of BFD > > > > Control packets: > > > > > NEW TEXT: > > > > > > > > > > An operator MUST select a > VNI > > > number to > > > > be used as > > > > > Management VNI. VXLAN > > packet for > > > > Management VNI MUST NOT > > > > > be sent to a tenant. VNI > > number 1 is > > > > RECOMMENDED as the > > > > > default for Management VNI. > > > > > > > > > > With that new text, what can be > the > > > value of > > > > the destination > > > > > MAC in the inner Ethernet? I > > tend to > > > believe > > > > that it can be > > > > > anything and ignored by the > > reciever VTEP. > > > > Also, if the > > > > > trapping is based on VNI > > number, the > > > > destination IP address > > > > > of the inner IP packet can from > > the range > > > > 127/8 for IPv4, > > > > > and for IPv6 from the range > > > > 0:0:0:0:0:FFFF:7F00:0/104. And > > > > > lastly, the TTL to be set to 1 > (no > > > change here). > > > > > > > > > > Much appreciate your comments, > > > questions, and > > > > suggestions. > > > > > > > > > > Best regards, > > > > > Greg > > > > > > > > > > > > > > > --000000000000917b65058f2b95f8 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj48L2Rpdj48ZGl2PldoYXQgaXMgdGhlIHN0YXRlZCBwdXJwb3Nl IG9mIHRoaXMgQkZEIHNlc3Npb24/IFRoZSBWVEVQIHJlYWNoYWJpbGl0eSBpcyBkZXRlcm1pbmVk IGJ5IHRoZSB1bmRlcmxheSwgSSBkb24mIzM5O3QgbmVlZCBWWExBTi1lbmNhcGVkIHBhY2tldCBm b3IgdGhhdC4gRG8gd2UgYWdyZWU/PC9kaXY+PGRpdj48YnI+PC9kaXY+PGRpdj5JZiBJIHdhbnQg dG8gdGVzdCB0aGUgVlhMQU4gZW5jYXAvZGVjYXAgZnVuY3Rpb25hbGl0eSBhbG9uZSwgcGlja2lu ZyBhbnkgc2luZ2xlIFZOSSBtYXliZSBmaW5lLiBCdXQgaXMgdGhpcyBhbGwgYW55IG5ldHdvcmsg b3BlcmF0b3Igd2FudHM/IFdoeT8gSW4gd2hhdCBzaXR1YXRpb25zIGhhcyB0aGlzIGJlZW4gYSBw cm9ibGVtPyBJIHN1c3BlY3Qgb3BlcmF0b3JzIGFsc28gd2FudCB0byB2ZXJpZnkgcGF0aCBjb250 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h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=bxFuqiKUGkgXsXU+UkPvSX1eA99g1VRethJ7nVzw0Xk=; b=Ejes20AToYYYeDMSBacJaczik+qFU++WfZKnVaK/KHOO2ovRKyJPvQqRRQK5p+BvaM l8kgGBY0dGXIaSXvEL7/6w4tcXO+BtbtXZsLuOA+YMxUQ0MbYNgGv1YDdzFCsc8+kzzm +N963DMYqrYtzqS1wLrzLxw2fCXHpouAirUpFj/bA1dKzmpZNpnFjMxOY2jhZe6kabVa cdM3CLBdjm1ZrDtv5n7RvBUPEWdfPaPFyJ2O9/Y1wOdwb3ixUa0QzPT6v5QYue2wJDol B7/J3QwY059g4Eql0XM5nKjGocdZBYI5MxIGpgkNATG9IdUPT1jMlrzxrQ0s49xCQwr4 TGwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=bxFuqiKUGkgXsXU+UkPvSX1eA99g1VRethJ7nVzw0Xk=; b=YOKs9GjbrVxNyX7PSwx+7xtuWqrFoVsePF7XDc5+18aBty5hPfNnBAIfkS5mWlePM5 jqdA0ayU+sUNnUIVN0wUh9OVkT646Pd3Fdg1T9fa/Hxr/6Ut77Z5k7HfZWJkVIvFY0kD Anki0N3+UWP/BH60xvhEkEW/lIUVagSgAg6+WIV/XZYN/laTL0Z4/IQ3lL9Gqfs0VSF+ bGx/J3vjmpH03c3dC3NQYZQy2CN1wWXaGXPa0XldLYC8lTlTERAPw4eQoVKxmlKdRJAX p6bDIioa3L1i+2Z37WySuZ3z+yS+FSa8UOhADhfoKRQ2N9vkB0a8XZXujeztuwaD2EUJ I2hw== X-Gm-Message-State: APjAAAVlVUiT3D85a3josnEQMD11eY2D+JGK67AoIbOkdzihYWxiRpMt 1eQd2gluzJJb3CbmN7Tfw51ecw/djWZnAhTjnVKMOz858Ig= X-Google-Smtp-Source: APXvYqww5s61dT/o2bIPMNYtJ2jj98MtGp8qOM2c3zeu543D86BjwgYoeC4IpE2XlciEsue6lkM6CnXkhjwS0e60eL0= X-Received: by 2002:a1c:a5c2:: with SMTP id o185mr6116071wme.172.1564792913057; Fri, 02 Aug 2019 17:41:53 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> From: Dinesh Dutt Date: Fri, 2 Aug 2019 17:41:40 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: "Joel M. Halpern" Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000badbd3058f2bbd0f" Archived-At: X-Mailman-Approved-At: Sat, 03 Aug 2019 10:13:29 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Aug 2019 01:06:22 -0000 --000000000000badbd3058f2bbd0f Content-Type: text/plain; charset="UTF-8" The abstract reads this: " This document describes the use of the Bidirectional Forwarding Detection (BFD) protocol in point-to-point Virtual eXtensible Local Area Network (VXLAN) tunnels forming up an overlay network." How do you infer what you said? Dinesh On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern wrote: > I am going by what the draft says its purpose is. If you (Dinesh) want > the draft to fulfill a different purpose, then either ask the chairs to > take this draft back to the WG, or write a separate draft. > As currently written, the behavior Greg proposed meets the needs, and > does so in a way that is consistent with VxLAN. > > Yours, > Joel > > On 8/2/2019 8:30 PM, Dinesh Dutt wrote: > > What is the stated purpose of this BFD session? The VTEP reachability is > > determined by the underlay, I don't need VXLAN-encaped packet for that. > > Do we agree? > > > > If I want to test the VXLAN encap/decap functionality alone, picking any > > single VNI maybe fine. But is this all any network operator wants? Why? > > In what situations has this been a problem? I suspect operators also > > want to verify path continuity over a specific VNI. If you say this is > > not defined by the document, I disagree because the current version > > talks about controlling the number of BFD sessions between the VTEPs > > (see section 3). More importantly, this is a real problem that operators > > like to verify. > > > > Dinesh > > > > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern > > wrote: > > > > What is special about the management VNI is precisely that it is NOT > a > > tenant VNI. The VxLAN administration does know how it allocates VNI > to > > tenants, and which VNI it has allocated. In contrast, it does not > know > > which IP addresses or MAC adddresses teh tenant is using or may plan > > to use. > > > > Yours, > > Joel > > > > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: > > > The assumption of an IP address within any VNI is suspect that > way. > > > What's special about a single VNI, the management VNI? The VTEP IP > > > address does not belong in reality in any VNI. > > > > > > Dinesh > > > > > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern > > > > > >> wrote: > > > > > > Your response seems to miss two points: > > > > > > First, the problem you describe is not what the document says > > it is > > > solving. To the degree it discusses it at all, the document > > says " > > > In > > > most cases, a single BFD session is sufficient for the given > > VTEP to > > > monitor the reachability of a remote VTEP, regardless of the > > number of > > > VNIs in common. " > > > > > > Second, you assume the existence of an IP address for a VTEP > > within a > > > VNI. As with the MAC address, the VTEP does not have an IP > > address > > > within the VNI. Some implementations may have created such a > > thing, > > > but > > > the general construct, as defined to date, does not support > such. > > > > > > In short, you are requiring a behavior that violates the > > architectural > > > structure of overlay / underlay separation, and common > > usage. And you > > > are doing so to support a use case that the working group has > not > > > indicated in the document as important. > > > > > > Yours, > > > Joel > > > > > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: > > > > Joel, > > > > > > > > You understood correctly. > > > > > > > > The VNIs may not share fate due to misconfiguration. And I > > strongly > > > > suspect someone will want to use BFD for that because its > > about > > > checking > > > > path continuity as stated by the draft. As long as there's > a > > > valid IP > > > > (because it's BFD) owned by the VTEP in that VNI, you can > > use BFD in > > > > that VNI. Thats all that you need to dictate. That IP > address > > > has a MAC > > > > address and you can use that on the inner frame. That is > > all normal > > > > VXLAN processing. The outer IP is always that of the VTEP. > > > > > > > > Dinesh > > > > > > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern > > > > > > > > > > > > >>> wrote: > > > > > > > > If I am reading your various emails correctly Dinesh > > (and I > > > may have > > > > missed something) you are trying to use the MAC address > > > because you > > > > want > > > > to be able to send these BFD packets over arbitrary > VNI to > > > monitor the > > > > VNI. That is not a requirement identified in the > > document. > > > It is not > > > > even a problem I understand, since all the VNI between > an > > > ingress and > > > > egress VTEP share fate. > > > > > > > > Yours, > > > > Joel > > > > > > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: > > > > > Thanks for verifying this. On Linux and hardware > > routers > > > that I'm > > > > aware > > > > > of (Cisco circa 2012 and Cumulus), the physical MAC > > address is > > > > reused > > > > > across the VNIs on the VTEP. Did you check on a > non-VMW > > > device? > > > > This is > > > > > more for my own curiosity. > > > > > > > > > > To address the general case, can we not define a > > > well-known (or > > > > reserve > > > > > one) unicast MAC address for use with VTEP? If the > MAC > > > address is > > > > > configurable in BFD command, this can be moot. > > > > > > > > > > Dinesh > > > > > > > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K > > > > > > > > > > > > > > > > > > > > >> > > > > > > > > > > > > > > > > > > > >>>> wrote: > > > > > > > > > > I have cross checked point raised about MAC > address > > > usage. It is > > > > > possible that tenant could be using physical MAC > > > address and > > > > when a > > > > > packet comes with valid VNI with a MAC address > > that is > > > being > > > > used by > > > > > tenant then packet will be sent to that tenant. > > This rules > > > > out the > > > > > fact that we could use physical MAC address as > > inner > > > MAC to > > > > ensure > > > > > packets get terminated at VTEP itself. > > > > > > > > > > Thanks > > > > > Santosh P K > > > > > > > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K > > > > > > > > > > > > > > > > > > > > >> > > > > > > > > > > > > > > > > > > > >>>> > > > > > wrote: > > > > > > > > > > Joel, > > > > > Thanks for your inputs. I checked > > > implementation within > > > > > Vmware. Perhaps I should have been more > clear > > > about MAC > > > > address > > > > > space while checking internally. I will > cross > > > check again for > > > > > the same and get back on this list. > > > > > > > > > > Thanks > > > > > Santosh P K > > > > > > > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. > > Halpern > > > > > > > > > > > > > >> > > > > > > > > > > > > >>>> wrote: > > > > > > > > > > Sorry to ask a stupid question. Whose > > > implementation? > > > > > > > > > > The reason I ask is that as far as I > > can tell, > > > since the > > > > > tenant does not > > > > > have any control access to the VTEP, > > there is no > > > > reason for > > > > > the VTEP to > > > > > have a MAC address in the tenant > > space. Yes, the > > > > device has > > > > > a physical > > > > > MAC address. But the tenant could well > be > > > using that MAC > > > > > address. Yes, > > > > > they would be violating the Ethernet > spec. > > > But the whole > > > > > point of > > > > > segregation is not to care about such > > issues. > > > > > > > > > > On the other hand, if you tell me that > > the VMWare > > > > > implementation has an > > > > > Ethernet address that is part of the > tenant > > > space, well, > > > > > they made up > > > > > this particular game. > > > > > > > > > > Yours, > > > > > Joel > > > > > > > > > > On 7/31/2019 1:44 PM, Santosh P K wrote: > > > > > > I have checked with implementation > > in data > > > path. > > > > When we > > > > > receive a > > > > > > packet with valid VNI then lookup > > for MAC will > > > > happen and > > > > > it is VTEP own > > > > > > MAC then it will be trapped to > control > > > plane for > > > > > processing. I think we > > > > > > can have following options > > > > > > 1. Optional managment VNI > > > > > > 2. Mandatory inner MAC set to VTEP > mac > > > > > > 3. Inner IP TTL set to 1 to avoid > > > forwarding of packet > > > > > via inner IP > > > > > > address. > > > > > > > > > > > > > > > > > > Thoughts? > > > > > > > > > > > > Thansk > > > > > > Santosh P K > > > > > > > > > > > > On Wed, Jul 31, 2019 at 9:20 AM Greg > > Mirsky > > > > > > > > > > > > > > > >>> > > > > > > > > > > > > >>> > > > > > > > > > > > > > > > > > >> > > > > > > > > > > > > > > > > > > > >>>>> wrote: > > > > > > > > > > > > Hi Dinesh, > > > > > > thank you for your consideration > > of the > > > > proposal and > > > > > questions. What > > > > > > would you see as the scope of > > testing the > > > > > connectivity for the > > > > > > specific VNI? If it is > > > tenant-to-tenant, then > > > > VTEPs > > > > > will treat these > > > > > > packets as regular user frames. > More > > > likely, these > > > > > could be Layer 2 > > > > > > OAM, e.g. CCM frames. The reason > > to use > > > 127/8 for > > > > > IPv4, and > > > > > > 0:0:0:0:0:FFFF:7F00:0/104 for > > IPv6 is > > > to safeguard > > > > > from leaking > > > > > > Ethernet frames with BFD Control > > packet > > > to a > > > > tenant. > > > > > > You've suggested using a MAC > > address to > > > trap the > > > > > control packet at > > > > > > VTEP. What that address could > be? We > > > had proposed > > > > > using the > > > > > > dedicated MAC and VTEP's MAC and > > both > > > raised > > > > concerns > > > > > among VXLAN > > > > > > experts. The idea of using > > Management > > > VNI may > > > > be more > > > > > acceptable > > > > > > based on its similarity to the > > practice > > > of using > > > > > Management VLAN. > > > > > > > > > > > > Regards, > > > > > > Greg > > > > > > > > > > > > On Wed, Jul 31, 2019 at 12:03 PM > > Dinesh > > > Dutt > > > > > > > > > > > > > >> > > > > > > > > > > > > >>> > > > > > > > > > > > > > > > > > >> > > > > > > > > > > > > >>>>> > > > > > wrote: > > > > > > > > > > > > Hi Greg, > > > > > > > > > > > > As long as the inner MAC > > address is > > > such > > > > that the > > > > > packet is > > > > > > trapped to the CPU, it > should be > > > fine for > > > > use as > > > > > an inner MAC is > > > > > > it not? Stating that is > > better than > > > trying to > > > > > force a management > > > > > > VNI. What if someone wants > > to test > > > > connectivity > > > > > on a specific > > > > > > VNI? I would not pick a > > loopback IP > > > > address for > > > > > this since that > > > > > > address range is host/node > local > > > only. Is > > > > there a > > > > > reason you're > > > > > > not using the VTEP IP as the > > inner IP > > > > address ? > > > > > > > > > > > > Dinesh > > > > > > > > > > > > On Wed, Jul 31, 2019 at 5:48 > AM > > > Greg Mirsky > > > > > > > > > > > > > > > > > >> > > > > > > > > > > > > > > > > > > > >>> > > > > > > > > > > > >> > > > > > > > > > > > > > > > > > > > >>>>> wrote: > > > > > > > > > > > > Dear All, > > > > > > thank you for your > comments, > > > > suggestions on > > > > > this issue, > > > > > > probably the most > > challenging > > > for this > > > > > specification. In the > > > > > > course of our > discussions, > > > we've agreed to > > > > > abandon the > > > > > > request to allocate the > > > dedicated MAC > > > > address > > > > > to be used as > > > > > > the destination MAC > > address in > > > the inner > > > > > Ethernet frame. > > > > > > Also, earlier using VNI > > 0 was > > > changed from > > > > > mandatory to one > > > > > > of the options an > > > implementation may > > > > offer to > > > > > an operator. > > > > > > The most recent > > discussion was > > > whether > > > > VTEP's > > > > > MAC address > > > > > > might be used as the > > > destination MAC > > > > address > > > > > in the inner > > > > > > Ethernet frame. As I > > recall it, the > > > > comments > > > > > from VXLAN > > > > > > experts equally split > > with one > > > for it > > > > and one > > > > > against. Hence > > > > > > I would like to propose > > a new > > > text to > > > > resolve > > > > > the issue. The > > > > > > idea is to let an > > operator select > > > > Management > > > > > VNI and use > > > > > > that VNI in VXLAN > > encapsulation > > > of BFD > > > > > Control packets: > > > > > > NEW TEXT: > > > > > > > > > > > > An operator MUST > > select a VNI > > > > number to > > > > > be used as > > > > > > Management VNI. VXLAN > > > packet for > > > > > Management VNI MUST NOT > > > > > > be sent to a tenant. > VNI > > > number 1 is > > > > > RECOMMENDED as the > > > > > > default for > > Management VNI. > > > > > > > > > > > > With that new text, what > > can be the > > > > value of > > > > > the destination > > > > > > MAC in the inner > Ethernet? I > > > tend to > > > > believe > > > > > that it can be > > > > > > anything and ignored by > the > > > reciever VTEP. > > > > > Also, if the > > > > > > trapping is based on VNI > > > number, the > > > > > destination IP address > > > > > > of the inner IP packet > > can from > > > the range > > > > > 127/8 for IPv4, > > > > > > and for IPv6 from the > range > > > > > 0:0:0:0:0:FFFF:7F00:0/104. And > > > > > > lastly, the TTL to be > > set to 1 (no > > > > change here). > > > > > > > > > > > > Much appreciate your > > comments, > > > > questions, and > > > > > suggestions. > > > > > > > > > > > > Best regards, > > > > > > Greg > > > > > > > > > > > > > > > > > > > > > --000000000000badbd3058f2bbd0f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+VGhlIGFic3RyYWN0IHJlYWRzIHRoaXM6ICZxdW90Ozxicj48cHJlPlRo aXMgZG9jdW1lbnQgZGVzY3JpYmVzIHRoZSB1c2Ugb2YgdGhlIEJpZGlyZWN0aW9uYWwgRm9yd2Fy ZGluZw0KICAgRGV0ZWN0aW9uIChCRkQpIHByb3RvY29sIGluIHBvaW50LXRvLXBvaW50IFZpcnR1 YWwgZVh0ZW5zaWJsZSBMb2NhbA0KICAgQXJlYSBOZXR3b3JrIChWWExBTikgdHVubmVscyBmb3Jt aW5nIHVwIGFuIG92ZXJsYXkgbmV0d29yay4mcXVvdDs8YnI+PGJyPjwvcHJlPjxwcmU+PHNwYW4g c3R5bGU9ImZvbnQtZmFtaWx5OmFyaWFsLHNhbnMtc2VyaWYiPkhvdyBkbyB5b3UgaW5mZXIgd2hh dCB5b3Ugc2FpZD88YnI+PGJyPjwvc3Bhbj48L3ByZT48cHJlPjxzcGFuIHN0eWxlPSJmb250LWZh bWlseTphcmlhbCxzYW5zLXNlcmlmIj5EaW5lc2g8L3NwYW4+PGJyPjwvcHJlPjwvZGl2Pjxicj48 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(amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qRaRF3KL08n9; Fri, 2 Aug 2019 18:07:57 -0700 (PDT) Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B84D012001E; Fri, 2 Aug 2019 18:07:56 -0700 (PDT) Received: by mail-wm1-x343.google.com with SMTP id f17so67882484wme.2; Fri, 02 Aug 2019 18:07:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=j2U0O270eDA4gDw8gtgMG/LJeKmjB98dBgNme7kUWXE=; b=lHJenMZ/fFoY+vN7pwEnXjOZH4vpuouv6+m0V/NsyK29qEot8Z2uYNJI1vWEFzF9hv RDxhytFVlXzesg8QQTOtjGQL+fu0K8U3Chjv4ymhvhd4YiBl3MsXaKO1LNhc8z9C+gQk 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APXvYqx5sa8JJcPOxAHfb0Q6pLx5Ebwx7bpFk7Ll2Z+ZQ6ut2A3HmaCwXwm6CLYzfwbLnaw89gnQkNvXU+jza7Lfp3o= X-Received: by 2002:a1c:238e:: with SMTP id j136mr6035450wmj.144.1564793030326; Fri, 02 Aug 2019 17:43:50 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Dinesh Dutt Date: Fri, 2 Aug 2019 17:43:38 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: "Joel M. Halpern" Cc: Santosh P K , Greg Mirsky , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000b840a7058f2bc403" Archived-At: X-Mailman-Approved-At: Sat, 03 Aug 2019 10:13:30 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Aug 2019 01:08:02 -0000 --000000000000b840a7058f2bc403 Content-Type: text/plain; charset="UTF-8" What I mean is "How do you infer that it excludes the case I'm talking about?". Dinesh On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: > The abstract reads this: " > > This document describes the use of the Bidirectional Forwarding > Detection (BFD) protocol in point-to-point Virtual eXtensible Local > Area Network (VXLAN) tunnels forming up an overlay network." > > How do you infer what you said? > > Dinesh > > > On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern > wrote: > >> I am going by what the draft says its purpose is. If you (Dinesh) want >> the draft to fulfill a different purpose, then either ask the chairs to >> take this draft back to the WG, or write a separate draft. >> As currently written, the behavior Greg proposed meets the needs, and >> does so in a way that is consistent with VxLAN. >> >> Yours, >> Joel >> >> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >> > What is the stated purpose of this BFD session? The VTEP reachability >> is >> > determined by the underlay, I don't need VXLAN-encaped packet for that. >> > Do we agree? >> > >> > If I want to test the VXLAN encap/decap functionality alone, picking >> any >> > single VNI maybe fine. But is this all any network operator wants? Why? >> > In what situations has this been a problem? I suspect operators also >> > want to verify path continuity over a specific VNI. If you say this is >> > not defined by the document, I disagree because the current version >> > talks about controlling the number of BFD sessions between the VTEPs >> > (see section 3). More importantly, this is a real problem that >> operators >> > like to verify. >> > >> > Dinesh >> > >> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern > > > wrote: >> > >> > What is special about the management VNI is precisely that it is >> NOT a >> > tenant VNI. The VxLAN administration does know how it allocates >> VNI to >> > tenants, and which VNI it has allocated. In contrast, it does not >> know >> > which IP addresses or MAC adddresses teh tenant is using or may plan >> > to use. >> > >> > Yours, >> > Joel >> > >> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >> > > The assumption of an IP address within any VNI is suspect that >> way. >> > > What's special about a single VNI, the management VNI? The VTEP >> IP >> > > address does not belong in reality in any VNI. >> > > >> > > Dinesh >> > > >> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >> > >> > > >> >> wrote: >> > > >> > > Your response seems to miss two points: >> > > >> > > First, the problem you describe is not what the document says >> > it is >> > > solving. To the degree it discusses it at all, the document >> > says " >> > > In >> > > most cases, a single BFD session is sufficient for the given >> > VTEP to >> > > monitor the reachability of a remote VTEP, regardless of the >> > number of >> > > VNIs in common. " >> > > >> > > Second, you assume the existence of an IP address for a VTEP >> > within a >> > > VNI. As with the MAC address, the VTEP does not have an IP >> > address >> > > within the VNI. Some implementations may have created such a >> > thing, >> > > but >> > > the general construct, as defined to date, does not support >> such. >> > > >> > > In short, you are requiring a behavior that violates the >> > architectural >> > > structure of overlay / underlay separation, and common >> > usage. And you >> > > are doing so to support a use case that the working group >> has not >> > > indicated in the document as important. >> > > >> > > Yours, >> > > Joel >> > > >> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >> > > > Joel, >> > > > >> > > > You understood correctly. >> > > > >> > > > The VNIs may not share fate due to misconfiguration. And I >> > strongly >> > > > suspect someone will want to use BFD for that because its >> > about >> > > checking >> > > > path continuity as stated by the draft. As long as >> there's a >> > > valid IP >> > > > (because it's BFD) owned by the VTEP in that VNI, you can >> > use BFD in >> > > > that VNI. Thats all that you need to dictate. That IP >> address >> > > has a MAC >> > > > address and you can use that on the inner frame. That is >> > all normal >> > > > VXLAN processing. The outer IP is always that of the VTEP. >> > > > >> > > > Dinesh >> > > > >> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >> > > >> > > >> > > > >> > >>> wrote: >> > > > >> > > > If I am reading your various emails correctly Dinesh >> > (and I >> > > may have >> > > > missed something) you are trying to use the MAC >> address >> > > because you >> > > > want >> > > > to be able to send these BFD packets over arbitrary >> VNI to >> > > monitor the >> > > > VNI. That is not a requirement identified in the >> > document. >> > > It is not >> > > > even a problem I understand, since all the VNI >> between an >> > > ingress and >> > > > egress VTEP share fate. >> > > > >> > > > Yours, >> > > > Joel >> > > > >> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >> > > > > Thanks for verifying this. On Linux and hardware >> > routers >> > > that I'm >> > > > aware >> > > > > of (Cisco circa 2012 and Cumulus), the physical MAC >> > address is >> > > > reused >> > > > > across the VNIs on the VTEP. Did you check on a >> non-VMW >> > > device? >> > > > This is >> > > > > more for my own curiosity. >> > > > > >> > > > > To address the general case, can we not define a >> > > well-known (or >> > > > reserve >> > > > > one) unicast MAC address for use with VTEP? If the >> MAC >> > > address is >> > > > > configurable in BFD command, this can be moot. >> > > > > >> > > > > Dinesh >> > > > > >> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >> > > > > > > >> > > > > > >> > > > > > >> > > > > >> >> > > > > > >> > > > > > >> > > > > > >> > > > > >>>> wrote: >> > > > > >> > > > > I have cross checked point raised about MAC >> address >> > > usage. It is >> > > > > possible that tenant could be using physical >> MAC >> > > address and >> > > > when a >> > > > > packet comes with valid VNI with a MAC address >> > that is >> > > being >> > > > used by >> > > > > tenant then packet will be sent to that tenant. >> > This rules >> > > > out the >> > > > > fact that we could use physical MAC address as >> > inner >> > > MAC to >> > > > ensure >> > > > > packets get terminated at VTEP itself. >> > > > > >> > > > > Thanks >> > > > > Santosh P K >> > > > > >> > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K >> > > > > > > >> > > > > > >> > > > > > >> > > > > >> >> > > > > > >> > > > > > >> > > > > > >> > > > > >>>> >> > > > > wrote: >> > > > > >> > > > > Joel, >> > > > > Thanks for your inputs. I checked >> > > implementation within >> > > > > Vmware. Perhaps I should have been more >> clear >> > > about MAC >> > > > address >> > > > > space while checking internally. I will >> cross >> > > check again for >> > > > > the same and get back on this list. >> > > > > >> > > > > Thanks >> > > > > Santosh P K >> > > > > >> > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. >> > Halpern >> > > > > > > > > > >> > > >> > >> >> > > > > > > > > >> > > >> > >>>> wrote: >> > > > > >> > > > > Sorry to ask a stupid question. Whose >> > > implementation? >> > > > > >> > > > > The reason I ask is that as far as I >> > can tell, >> > > since the >> > > > > tenant does not >> > > > > have any control access to the VTEP, >> > there is no >> > > > reason for >> > > > > the VTEP to >> > > > > have a MAC address in the tenant >> > space. Yes, the >> > > > device has >> > > > > a physical >> > > > > MAC address. But the tenant could >> well be >> > > using that MAC >> > > > > address. Yes, >> > > > > they would be violating the Ethernet >> spec. >> > > But the whole >> > > > > point of >> > > > > segregation is not to care about such >> > issues. >> > > > > >> > > > > On the other hand, if you tell me that >> > the VMWare >> > > > > implementation has an >> > > > > Ethernet address that is part of the >> tenant >> > > space, well, >> > > > > they made up >> > > > > this particular game. >> > > > > >> > > > > Yours, >> > > > > Joel >> > > > > >> > > > > On 7/31/2019 1:44 PM, Santosh P K >> wrote: >> > > > > > I have checked with implementation >> > in data >> > > path. >> > > > When we >> > > > > receive a >> > > > > > packet with valid VNI then lookup >> > for MAC will >> > > > happen and >> > > > > it is VTEP own >> > > > > > MAC then it will be trapped to >> control >> > > plane for >> > > > > processing. I think we >> > > > > > can have following options >> > > > > > 1. Optional managment VNI >> > > > > > 2. Mandatory inner MAC set to VTEP >> mac >> > > > > > 3. Inner IP TTL set to 1 to avoid >> > > forwarding of packet >> > > > > via inner IP >> > > > > > address. >> > > > > > >> > > > > > >> > > > > > Thoughts? >> > > > > > >> > > > > > Thansk >> > > > > > Santosh P K >> > > > > > >> > > > > > On Wed, Jul 31, 2019 at 9:20 AM Greg >> > Mirsky >> > > > > > > >> > > > >> >> > >> > > > >>> >> > > > > > > > > >> > > >> > >>> >> > > > > > > > >> > > > >> >> > > > > > > > >> >> > > > > > > >> > > > >> >> > > > > > >> > > > > >>>>> wrote: >> > > > > > >> > > > > > Hi Dinesh, >> > > > > > thank you for your consideration >> > of the >> > > > proposal and >> > > > > questions. What >> > > > > > would you see as the scope of >> > testing the >> > > > > connectivity for the >> > > > > > specific VNI? If it is >> > > tenant-to-tenant, then >> > > > VTEPs >> > > > > will treat these >> > > > > > packets as regular user frames. >> More >> > > likely, these >> > > > > could be Layer 2 >> > > > > > OAM, e.g. CCM frames. The reason >> > to use >> > > 127/8 for >> > > > > IPv4, and >> > > > > > 0:0:0:0:0:FFFF:7F00:0/104 for >> > IPv6 is >> > > to safeguard >> > > > > from leaking >> > > > > > Ethernet frames with BFD Control >> > packet >> > > to a >> > > > tenant. >> > > > > > You've suggested using a MAC >> > address to >> > > trap the >> > > > > control packet at >> > > > > > VTEP. What that address could >> be? We >> > > had proposed >> > > > > using the >> > > > > > dedicated MAC and VTEP's MAC and >> > both >> > > raised >> > > > concerns >> > > > > among VXLAN >> > > > > > experts. The idea of using >> > Management >> > > VNI may >> > > > be more >> > > > > acceptable >> > > > > > based on its similarity to the >> > practice >> > > of using >> > > > > Management VLAN. >> > > > > > >> > > > > > Regards, >> > > > > > Greg >> > > > > > >> > > > > > On Wed, Jul 31, 2019 at 12:03 PM >> > Dinesh >> > > Dutt >> > > > > > > > > > >> > > >> > >> >> > > > >> > > >> > > >> > >>> >> > > > > > > > >> > > > >> > > > >> > >> >> > > >> > > >> > > > >> > >>>>> >> > > > > wrote: >> > > > > > >> > > > > > Hi Greg, >> > > > > > >> > > > > > As long as the inner MAC >> > address is >> > > such >> > > > that the >> > > > > packet is >> > > > > > trapped to the CPU, it >> should be >> > > fine for >> > > > use as >> > > > > an inner MAC is >> > > > > > it not? Stating that is >> > better than >> > > trying to >> > > > > force a management >> > > > > > VNI. What if someone wants >> > to test >> > > > connectivity >> > > > > on a specific >> > > > > > VNI? I would not pick a >> > loopback IP >> > > > address for >> > > > > this since that >> > > > > > address range is host/node >> local >> > > only. Is >> > > > there a >> > > > > reason you're >> > > > > > not using the VTEP IP as the >> > inner IP >> > > > address ? >> > > > > > >> > > > > > Dinesh >> > > > > > >> > > > > > On Wed, Jul 31, 2019 at >> 5:48 AM >> > > Greg Mirsky >> > > > > > > > >> > > > >> >> > > > > > > > >> >> > > > > > > >> > > > >> >> > > > > > >> > > > > >>> > > >> > > > >> >> > > > > > > > >> >> > > > > > > >> > > > >> >> > > > > > >> > > > > >>>>> wrote: >> > > > > > >> > > > > > Dear All, >> > > > > > thank you for your >> comments, >> > > > suggestions on >> > > > > this issue, >> > > > > > probably the most >> > challenging >> > > for this >> > > > > specification. In the >> > > > > > course of our >> discussions, >> > > we've agreed to >> > > > > abandon the >> > > > > > request to allocate the >> > > dedicated MAC >> > > > address >> > > > > to be used as >> > > > > > the destination MAC >> > address in >> > > the inner >> > > > > Ethernet frame. >> > > > > > Also, earlier using VNI >> > 0 was >> > > changed from >> > > > > mandatory to one >> > > > > > of the options an >> > > implementation may >> > > > offer to >> > > > > an operator. >> > > > > > The most recent >> > discussion was >> > > whether >> > > > VTEP's >> > > > > MAC address >> > > > > > might be used as the >> > > destination MAC >> > > > address >> > > > > in the inner >> > > > > > Ethernet frame. As I >> > recall it, the >> > > > comments >> > > > > from VXLAN >> > > > > > experts equally split >> > with one >> > > for it >> > > > and one >> > > > > against. Hence >> > > > > > I would like to propose >> > a new >> > > text to >> > > > resolve >> > > > > the issue. The >> > > > > > idea is to let an >> > operator select >> > > > Management >> > > > > VNI and use >> > > > > > that VNI in VXLAN >> > encapsulation >> > > of BFD >> > > > > Control packets: >> > > > > > NEW TEXT: >> > > > > > >> > > > > > An operator MUST >> > select a VNI >> > > > number to >> > > > > be used as >> > > > > > Management VNI. >> VXLAN >> > > packet for >> > > > > Management VNI MUST NOT >> > > > > > be sent to a >> tenant. VNI >> > > number 1 is >> > > > > RECOMMENDED as the >> > > > > > default for >> > Management VNI. >> > > > > > >> > > > > > With that new text, what >> > can be the >> > > > value of >> > > > > the destination >> > > > > > MAC in the inner >> Ethernet? I >> > > tend to >> > > > believe >> > > > > that it can be >> > > > > > anything and ignored by >> the >> > > reciever VTEP. >> > > > > Also, if the >> > > > > > trapping is based on VNI >> > > number, the >> > > > > destination IP address >> > > > > > of the inner IP packet >> > can from >> > > the range >> > > > > 127/8 for IPv4, >> > > > > > and for IPv6 from the >> range >> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >> > > > > > lastly, the TTL to be >> > set to 1 (no >> > > > change here). >> > > > > > >> > > > > > Much appreciate your >> > comments, >> > > > questions, and >> > > > > suggestions. >> > > > > > >> > > > > > Best regards, >> > > > > > Greg >> > > > > > >> > > > > >> > > > >> > > >> > >> > --000000000000b840a7058f2bc403 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj5XaGF0IEkgbWVhbiBpcyAmcXVvdDtIb3cgZG8geW91IGluZmVy IHRoYXQgaXQgZXhjbHVkZXMgdGhlIGNhc2UgSSYjMzk7bSB0YWxraW5nIGFib3V0PyZxdW90Oy4g PGJyPjwvZGl2PjxkaXY+PGJyPjwvZGl2PjxkaXY+RGluZXNoPGJyPjwvZGl2PjwvZGl2Pjxicj48 ZGl2IGNsYXNzPSJnbWFpbF9xdW90ZSI+PGRpdiBkaXI9Imx0ciIgY2xhc3M9ImdtYWlsX2F0dHIi Pk9uIEZyaSwgQXVnIDIsIDIwMTkgYXQgNTo0MSBQTSBEaW5lc2ggRHV0dCAmbHQ7PGEgaHJlZj0i bWFpbHRvOmRpZHV0dEBnbWFpbC5jb20iPmRpZHV0dEBnbWFpbC5jb208L2E+Jmd0OyB3cm90ZTo8 YnI+PC9kaXY+PGJsb2NrcXVvdGUgY2xhc3M9ImdtYWlsX3F1b3RlIiBzdHlsZT0ibWFyZ2luOjBw 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DQo8L2Jsb2NrcXVvdGU+PC9kaXY+DQo= --000000000000b840a7058f2bc403-- From nobody Mon Aug 5 15:16:19 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8466512009C; Mon, 5 Aug 2019 15:16:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QyF2Nj8nmFUv; Mon, 5 Aug 2019 15:16:16 -0700 (PDT) Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 17F1F120073; Mon, 5 Aug 2019 15:16:16 -0700 (PDT) Received: by mail-lf1-x134.google.com with SMTP id b29so52039104lfq.1; Mon, 05 Aug 2019 15:16:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=X2NC7BhKP2CYpHmS4YmzpgqGM7cFG3M/os+8DZxjAnw=; b=iG6HtTbzGkglmyYCE1BHdaCwrnquWGxhFW72PWKTDRehUHBNMFjlqOcZqav6daza9M 7fzOLbEFHLJZPCZSMY7XJ7zYhTJhW7UT6EmfMiL/Byh1T8JBJXFkzz2/MCYm4oUXlwJ8 vGDWzUwwYz0AIUsfe/MCKyzeKs9sLpx0yBW2pga8OgYcBUXGalQYdjgB/JPr15JHo4a2 FchBYRXDNYrOBwjD7hT3fuAAa7eotENjlInBMCJNouwlRXhsPDns3FOBjm/BeKdRpJQg 1J/4RsBQUkC3cAZs+IuZkAoBi/UJ0DxQQuv6poOjpDYQFXnRxFFSXp2s0dn6zbO61FhG dQUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=X2NC7BhKP2CYpHmS4YmzpgqGM7cFG3M/os+8DZxjAnw=; b=dSKANKeZL0PhoohhVuuuLHMKp2gfQDTZvLhZ8PtcgO76H6hK38FM3f2ur+zAcTfAaK iBDnJqUMiCGOQgVyS7VmB7DAtz1oYa4Kb9mp417G1dOKUU/PGjg0BrrwXPDunC8AyEd4 0xhV+1KZMD+l1LZUqyfRrP/eo4LoduAPXQXj0yXhegUzqgdwHUGWQ+SKjovQmwXk9f8J DkpZVF0zoriVrIeO8UOyKo/PirbyYicg42W5sx51s/t8/KGQwKbVEBV18XSNO2dOgWeF ky3pKzRDj7f1BzuqWE937e671m+QpMT2qcN9NxGmgorW/CScrJvEgRkA/FblziJ2IOXs HOxw== X-Gm-Message-State: APjAAAVmNuot/h2ivvDm5aEbObn3iisfr8HYwPN9DtOm5oYXUN6ErQ/R Mn4YYPNY5iZm5XNGyMMffRDwKdcpixIxrooB6K2k0DTS X-Google-Smtp-Source: APXvYqxAXz2NOdFtmF/IxxWgoXINFuwJZJLIO0lWVb4WQWg1XvIYyPiKAERtp1/TLLviXMxGaNtLKYvVumauaHa6Ee0= X-Received: by 2002:a19:cbc4:: with SMTP id b187mr6533852lfg.27.1565043373990; Mon, 05 Aug 2019 15:16:13 -0700 (PDT) MIME-Version: 1.0 From: Greg Mirsky Date: Mon, 5 Aug 2019 15:16:03 -0700 Message-ID: Subject: BFD Echo mode coverage in BFD for VXLAN To: rtg-bfd WG , bfd-chairs@ietf.org, Martin Vigoureux , "Carlos Pignataro (cpignata)" Content-Type: multipart/alternative; boundary="0000000000005d6797058f660e71" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Aug 2019 22:16:18 -0000 --0000000000005d6797058f660e71 Content-Type: text/plain; charset="UTF-8" Dear All, in course of reviews of the draft, several times a question was asked about the rationale for excluding BFD Echo from the scope of this document: 7. Echo BFD Support for echo BFD is outside the scope of this document. Much appreciate your consideration of the following options: - describe the applicability of BFD Echo in VXLAN environment in the document; - remove Section 7 and clarify in the Introduction NEW TEXT: This specification describes procedures only for BFD Asynchronous mode. - make no changes at all. Regards, Greg --0000000000005d6797058f660e71 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
in course of reviews of the draft, several t= imes a question was asked about the rationale for excluding BFD Echo from t= he scope of this document:

7.=C2=A0 Echo BFD

=C2=A0 =C2=A0Support for echo BFD is outside the scope of this doc= ument.
Much appreciate your consideration of the followin= g options:
  • describe the applicability of BFD Echo in VXLAN envi= ronment in the document;
  • remove Section 7 and clarify in the Introd= uction
NEW TEXT:
This specification describes procedures only for B= FD Asynchronous mode.
  • make no changes at all.
Regards,
Greg
--0000000000005d6797058f660e71-- From nobody Tue Aug 6 05:08:11 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 26667120058; Sat, 3 Aug 2019 10:34:08 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3pTq1HldBsBi; Sat, 3 Aug 2019 10:34:03 -0700 (PDT) Received: from mail-lj1-x232.google.com (mail-lj1-x232.google.com [IPv6:2a00:1450:4864:20::232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2457A12011E; Sat, 3 Aug 2019 10:34:02 -0700 (PDT) Received: by mail-lj1-x232.google.com with SMTP id p17so75732487ljg.1; Sat, 03 Aug 2019 10:34:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=eqrcbNiAxK8Bzn3UZb5x32/fAkehEI/lq26qvpaB4B0=; b=dADpSXyWrhUVUDptKi58TSJDaAl4bNr5Pkc2+1wq4qKKcrKVOoJIebpX0lIFwRD9yI LBh1Q0KQ6H9wJtWbOCQi2jsZ8By3F2mMtEDDbsBTbYQqFAddES52coIK3k+nm9VAVCZZ lLSXeWiZeH4SXEBnK/RwlF94Poqmh7Bj3gAebWYGIiBtHxTEMnxYvqYG8dknWv/l9EsT lhCNhX/1jLxbmcoK21b/crK1JuaQnzW9Za9XFA0et0LdClTiEXX+M2ExBVwV0yrF2gk8 K8zA+74s6KSTnRuNkkT934WtW2Gp7lVjZZhSzAApKlc4RU5nSLS+adkwcD3M8XafHqid P2IA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=eqrcbNiAxK8Bzn3UZb5x32/fAkehEI/lq26qvpaB4B0=; b=Ac4r3f03IF0Zn5FqGPNohsvuV8u+agvx/rmVAZqeE21Z4eiFpt8QJNiFdsrOqGQoaV oCWXhVzlDcZlTrisrJw/rsPX1RFVtFGk7Vjqc+/3XvexzdMtwBwTBPN8yHcn8Eq2dY4x X27fCPi+K+xzHGA4K5xpVMXYXYqR32RBM2Fw9wMRrsEfeyZS+iRgZctcpXjj10jh68TB hUCVTh6tQ91BTgd6jIz3Q4DADunew2L+iRRDXGjVMZsSZ7dUwZiT6RqafHUX5vJb8q2A v/CV+6T3tQhNqWuJwhWlEiRjxl9fSA+NVI4y1qHLOtIaIDPB0IXYEFBLzXR1aCxuljmS On0g== X-Gm-Message-State: APjAAAU2bO8AGtJpSZguOwURB5r1Xuej494ztkt/tLWi59yQ9oC4w00k s1jXqfd3WzYzG+6qAseB6u0aX6gC/CR5ymYYy9g= X-Google-Smtp-Source: APXvYqw3CBzCbgmIl04ytePeQHRVgpRtVjYEkQYW7B9mC5U8e0+WnCBr4Bo1Da5z42EjKUmN+c1OkROy5wFpTe2wlq8= X-Received: by 2002:a2e:7c14:: with SMTP id x20mr49996836ljc.56.1564853640083; Sat, 03 Aug 2019 10:34:00 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Greg Mirsky Date: Sat, 3 Aug 2019 10:33:48 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/mixed; boundary="00000000000057dae4058f39e103" Archived-At: X-Mailman-Approved-At: Tue, 06 Aug 2019 05:08:05 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Aug 2019 17:34:08 -0000 --00000000000057dae4058f39e103 Content-Type: multipart/alternative; boundary="00000000000057dae1058f39e101" --00000000000057dae1058f39e101 Content-Type: text/plain; charset="UTF-8" Hi Dinesh, many thanks for your detailed updates on how some implementations process VXLAN header and the inner Ethernet frame. These are very helpful in achieving the workable solution for the problem at hand. You've noted that a path between VTEPs may be monitored in the underlay network by merely establishing a BFD session. That is true, but by using BFD with VXLAN encapsulation between the pair of VTEPs we are extending the OAM domain by including, to some extent, VXLAN forwarding engine. Abstract in RFC 5880 defines the goal and the domain in which BFD protocol can detect a fault as: This document describes a protocol intended to detect faults in the bidirectional path between two forwarding engines, including interfaces, data link(s), and to the extent possible the forwarding engines themselves, with potentially very low latency. Thus, BFD in the underlay will exercise a part of IP forwarding engine while BFD with VXLAN encapsulation, ran between the same pair of VTEPs, extends the OAM domain. At the same time, defining BFD between tenant systems in outside the goal of this specification. But VXLAN BFD session between VTEPs may be useful in monitoring e2e path between tenants, as described in the update to -07: At the same time, a service layer BFD session may be used between the tenants of VTEPs IP1 and IP2 to provide end-to-end fault management. In such case, for VTEPs BFD control packets of that session are indistinguishable from data packets. If end-to-end defect detection is realized as the set of concatenated OAM domains, e.g., VM1-1 - IP1 -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD follow the procedures described in Section 6.8.17 [RFC5880]. I've attached the current working version of the draft. Regards, Greg On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: > What I mean is "How do you infer that it excludes the case I'm talking > about?". > > Dinesh > > On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: > >> The abstract reads this: " >> >> This document describes the use of the Bidirectional Forwarding >> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >> Area Network (VXLAN) tunnels forming up an overlay network." >> >> How do you infer what you said? >> >> Dinesh >> >> >> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern >> wrote: >> >>> I am going by what the draft says its purpose is. If you (Dinesh) want >>> the draft to fulfill a different purpose, then either ask the chairs to >>> take this draft back to the WG, or write a separate draft. >>> As currently written, the behavior Greg proposed meets the needs, and >>> does so in a way that is consistent with VxLAN. >>> >>> Yours, >>> Joel >>> >>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>> > What is the stated purpose of this BFD session? The VTEP reachability >>> is >>> > determined by the underlay, I don't need VXLAN-encaped packet for >>> that. >>> > Do we agree? >>> > >>> > If I want to test the VXLAN encap/decap functionality alone, picking >>> any >>> > single VNI maybe fine. But is this all any network operator wants? >>> Why? >>> > In what situations has this been a problem? I suspect operators also >>> > want to verify path continuity over a specific VNI. If you say this is >>> > not defined by the document, I disagree because the current version >>> > talks about controlling the number of BFD sessions between the VTEPs >>> > (see section 3). More importantly, this is a real problem that >>> operators >>> > like to verify. >>> > >>> > Dinesh >>> > >>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern >> > > wrote: >>> > >>> > What is special about the management VNI is precisely that it is >>> NOT a >>> > tenant VNI. The VxLAN administration does know how it allocates >>> VNI to >>> > tenants, and which VNI it has allocated. In contrast, it does not >>> know >>> > which IP addresses or MAC adddresses teh tenant is using or may >>> plan >>> > to use. >>> > >>> > Yours, >>> > Joel >>> > >>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>> > > The assumption of an IP address within any VNI is suspect that >>> way. >>> > > What's special about a single VNI, the management VNI? The VTEP >>> IP >>> > > address does not belong in reality in any VNI. >>> > > >>> > > Dinesh >>> > > >>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>> > >>> > > >> >>> wrote: >>> > > >>> > > Your response seems to miss two points: >>> > > >>> > > First, the problem you describe is not what the document >>> says >>> > it is >>> > > solving. To the degree it discusses it at all, the document >>> > says " >>> > > In >>> > > most cases, a single BFD session is sufficient for the given >>> > VTEP to >>> > > monitor the reachability of a remote VTEP, regardless of the >>> > number of >>> > > VNIs in common. " >>> > > >>> > > Second, you assume the existence of an IP address for a VTEP >>> > within a >>> > > VNI. As with the MAC address, the VTEP does not have an IP >>> > address >>> > > within the VNI. Some implementations may have created such >>> a >>> > thing, >>> > > but >>> > > the general construct, as defined to date, does not support >>> such. >>> > > >>> > > In short, you are requiring a behavior that violates the >>> > architectural >>> > > structure of overlay / underlay separation, and common >>> > usage. And you >>> > > are doing so to support a use case that the working group >>> has not >>> > > indicated in the document as important. >>> > > >>> > > Yours, >>> > > Joel >>> > > >>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>> > > > Joel, >>> > > > >>> > > > You understood correctly. >>> > > > >>> > > > The VNIs may not share fate due to misconfiguration. And >>> I >>> > strongly >>> > > > suspect someone will want to use BFD for that because its >>> > about >>> > > checking >>> > > > path continuity as stated by the draft. As long as >>> there's a >>> > > valid IP >>> > > > (because it's BFD) owned by the VTEP in that VNI, you can >>> > use BFD in >>> > > > that VNI. Thats all that you need to dictate. That IP >>> address >>> > > has a MAC >>> > > > address and you can use that on the inner frame. That is >>> > all normal >>> > > > VXLAN processing. The outer IP is always that of the >>> VTEP. >>> > > > >>> > > > Dinesh >>> > > > >>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>> > > >>> > > >>> > > > >>> > >>> wrote: >>> > > > >>> > > > If I am reading your various emails correctly Dinesh >>> > (and I >>> > > may have >>> > > > missed something) you are trying to use the MAC >>> address >>> > > because you >>> > > > want >>> > > > to be able to send these BFD packets over arbitrary >>> VNI to >>> > > monitor the >>> > > > VNI. That is not a requirement identified in the >>> > document. >>> > > It is not >>> > > > even a problem I understand, since all the VNI >>> between an >>> > > ingress and >>> > > > egress VTEP share fate. >>> > > > >>> > > > Yours, >>> > > > Joel >>> > > > >>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>> > > > > Thanks for verifying this. On Linux and hardware >>> > routers >>> > > that I'm >>> > > > aware >>> > > > > of (Cisco circa 2012 and Cumulus), the physical >>> MAC >>> > address is >>> > > > reused >>> > > > > across the VNIs on the VTEP. Did you check on a >>> non-VMW >>> > > device? >>> > > > This is >>> > > > > more for my own curiosity. >>> > > > > >>> > > > > To address the general case, can we not define a >>> > > well-known (or >>> > > > reserve >>> > > > > one) unicast MAC address for use with VTEP? If >>> the MAC >>> > > address is >>> > > > > configurable in BFD command, this can be moot. >>> > > > > >>> > > > > Dinesh >>> > > > > >>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>> > > > > >> > >>> > > >> > > >>> > > > >> > >>> > > >> > >> >>> > > > >> > >>> > > >> > > >>> > > > >> > >>> > > >> > >>>> wrote: >>> > > > > >>> > > > > I have cross checked point raised about MAC >>> address >>> > > usage. It is >>> > > > > possible that tenant could be using physical >>> MAC >>> > > address and >>> > > > when a >>> > > > > packet comes with valid VNI with a MAC address >>> > that is >>> > > being >>> > > > used by >>> > > > > tenant then packet will be sent to that >>> tenant. >>> > This rules >>> > > > out the >>> > > > > fact that we could use physical MAC address as >>> > inner >>> > > MAC to >>> > > > ensure >>> > > > > packets get terminated at VTEP itself. >>> > > > > >>> > > > > Thanks >>> > > > > Santosh P K >>> > > > > >>> > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K >>> > > > > >> > >>> > > >> > > >>> > > > >> > >>> > > >> > >> >>> > > > >> > >>> > > >> > > >>> > > > >> > >>> > > >> > >>>> >>> > > > > wrote: >>> > > > > >>> > > > > Joel, >>> > > > > Thanks for your inputs. I checked >>> > > implementation within >>> > > > > Vmware. Perhaps I should have been more >>> clear >>> > > about MAC >>> > > > address >>> > > > > space while checking internally. I will >>> cross >>> > > check again for >>> > > > > the same and get back on this list. >>> > > > > >>> > > > > Thanks >>> > > > > Santosh P K >>> > > > > >>> > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. >>> > Halpern >>> > > > > >> > >> > > >>> > > >>> > >> >>> > > > >> > >> > > >>> > > >>> > >>>> >>> wrote: >>> > > > > >>> > > > > Sorry to ask a stupid question. Whose >>> > > implementation? >>> > > > > >>> > > > > The reason I ask is that as far as I >>> > can tell, >>> > > since the >>> > > > > tenant does not >>> > > > > have any control access to the VTEP, >>> > there is no >>> > > > reason for >>> > > > > the VTEP to >>> > > > > have a MAC address in the tenant >>> > space. Yes, the >>> > > > device has >>> > > > > a physical >>> > > > > MAC address. But the tenant could >>> well be >>> > > using that MAC >>> > > > > address. Yes, >>> > > > > they would be violating the Ethernet >>> spec. >>> > > But the whole >>> > > > > point of >>> > > > > segregation is not to care about such >>> > issues. >>> > > > > >>> > > > > On the other hand, if you tell me that >>> > the VMWare >>> > > > > implementation has an >>> > > > > Ethernet address that is part of the >>> tenant >>> > > space, well, >>> > > > > they made up >>> > > > > this particular game. >>> > > > > >>> > > > > Yours, >>> > > > > Joel >>> > > > > >>> > > > > On 7/31/2019 1:44 PM, Santosh P K >>> wrote: >>> > > > > > I have checked with implementation >>> > in data >>> > > path. >>> > > > When we >>> > > > > receive a >>> > > > > > packet with valid VNI then lookup >>> > for MAC will >>> > > > happen and >>> > > > > it is VTEP own >>> > > > > > MAC then it will be trapped to >>> control >>> > > plane for >>> > > > > processing. I think we >>> > > > > > can have following options >>> > > > > > 1. Optional managment VNI >>> > > > > > 2. Mandatory inner MAC set to VTEP >>> mac >>> > > > > > 3. Inner IP TTL set to 1 to avoid >>> > > forwarding of packet >>> > > > > via inner IP >>> > > > > > address. >>> > > > > > >>> > > > > > >>> > > > > > Thoughts? >>> > > > > > >>> > > > > > Thansk >>> > > > > > Santosh P K >>> > > > > > >>> > > > > > On Wed, Jul 31, 2019 at 9:20 AM >>> Greg >>> > Mirsky >>> > > > > >> > >>> > > >> >> >>> > >>> > > >> >>> >>> > > > >> > >> > > >>> > > >> > >>> > >>> >>> > > > > > >> > >>> > > >> >> >>> > > > >> > >> > >> >>> > > > > >> > >>> > > >> >> >>> > > > >> > >>> > > >> > >>>>> wrote: >>> > > > > > >>> > > > > > Hi Dinesh, >>> > > > > > thank you for your >>> consideration >>> > of the >>> > > > proposal and >>> > > > > questions. What >>> > > > > > would you see as the scope of >>> > testing the >>> > > > > connectivity for the >>> > > > > > specific VNI? If it is >>> > > tenant-to-tenant, then >>> > > > VTEPs >>> > > > > will treat these >>> > > > > > packets as regular user >>> frames. More >>> > > likely, these >>> > > > > could be Layer 2 >>> > > > > > OAM, e.g. CCM frames. The >>> reason >>> > to use >>> > > 127/8 for >>> > > > > IPv4, and >>> > > > > > 0:0:0:0:0:FFFF:7F00:0/104 for >>> > IPv6 is >>> > > to safeguard >>> > > > > from leaking >>> > > > > > Ethernet frames with BFD >>> Control >>> > packet >>> > > to a >>> > > > tenant. >>> > > > > > You've suggested using a MAC >>> > address to >>> > > trap the >>> > > > > control packet at >>> > > > > > VTEP. What that address could >>> be? We >>> > > had proposed >>> > > > > using the >>> > > > > > dedicated MAC and VTEP's MAC >>> and >>> > both >>> > > raised >>> > > > concerns >>> > > > > among VXLAN >>> > > > > > experts. The idea of using >>> > Management >>> > > VNI may >>> > > > be more >>> > > > > acceptable >>> > > > > > based on its similarity to the >>> > practice >>> > > of using >>> > > > > Management VLAN. >>> > > > > > >>> > > > > > Regards, >>> > > > > > Greg >>> > > > > > >>> > > > > > On Wed, Jul 31, 2019 at 12:03 >>> PM >>> > Dinesh >>> > > Dutt >>> > > > > >> > >> > > >>> > > >>> > >> >>> > > > >>> > > >>> > > >>> > >>> >>> > > > > > >> > >>> > > > >>> > > > >>> > >> >>> > > >>> > > >>> > > > >>> > >>>>> >>> > > > > wrote: >>> > > > > > >>> > > > > > Hi Greg, >>> > > > > > >>> > > > > > As long as the inner MAC >>> > address is >>> > > such >>> > > > that the >>> > > > > packet is >>> > > > > > trapped to the CPU, it >>> should be >>> > > fine for >>> > > > use as >>> > > > > an inner MAC is >>> > > > > > it not? Stating that is >>> > better than >>> > > trying to >>> > > > > force a management >>> > > > > > VNI. What if someone wants >>> > to test >>> > > > connectivity >>> > > > > on a specific >>> > > > > > VNI? I would not pick a >>> > loopback IP >>> > > > address for >>> > > > > this since that >>> > > > > > address range is host/node >>> local >>> > > only. Is >>> > > > there a >>> > > > > reason you're >>> > > > > > not using the VTEP IP as >>> the >>> > inner IP >>> > > > address ? >>> > > > > > >>> > > > > > Dinesh >>> > > > > > >>> > > > > > On Wed, Jul 31, 2019 at >>> 5:48 AM >>> > > Greg Mirsky >>> > > > > > >> > >>> > > >> >> >>> > > > >> > >> > >> >>> > > > > >> > >>> > > >> >> >>> > > > >> > >>> > > >> > >>> >> > >>> > > >> >> >>> > > > >> > >> > >> >>> > > > > >> > >>> > > >> >> >>> > > > >> > >>> > > >> > >>>>> wrote: >>> > > > > > >>> > > > > > Dear All, >>> > > > > > thank you for your >>> comments, >>> > > > suggestions on >>> > > > > this issue, >>> > > > > > probably the most >>> > challenging >>> > > for this >>> > > > > specification. In the >>> > > > > > course of our >>> discussions, >>> > > we've agreed to >>> > > > > abandon the >>> > > > > > request to allocate the >>> > > dedicated MAC >>> > > > address >>> > > > > to be used as >>> > > > > > the destination MAC >>> > address in >>> > > the inner >>> > > > > Ethernet frame. >>> > > > > > Also, earlier using VNI >>> > 0 was >>> > > changed from >>> > > > > mandatory to one >>> > > > > > of the options an >>> > > implementation may >>> > > > offer to >>> > > > > an operator. >>> > > > > > The most recent >>> > discussion was >>> > > whether >>> > > > VTEP's >>> > > > > MAC address >>> > > > > > might be used as the >>> > > destination MAC >>> > > > address >>> > > > > in the inner >>> > > > > > Ethernet frame. As I >>> > recall it, the >>> > > > comments >>> > > > > from VXLAN >>> > > > > > experts equally split >>> > with one >>> > > for it >>> > > > and one >>> > > > > against. Hence >>> > > > > > I would like to propose >>> > a new >>> > > text to >>> > > > resolve >>> > > > > the issue. The >>> > > > > > idea is to let an >>> > operator select >>> > > > Management >>> > > > > VNI and use >>> > > > > > that VNI in VXLAN >>> > encapsulation >>> > > of BFD >>> > > > > Control packets: >>> > > > > > NEW TEXT: >>> > > > > > >>> > > > > > An operator MUST >>> > select a VNI >>> > > > number to >>> > > > > be used as >>> > > > > > Management VNI. >>> VXLAN >>> > > packet for >>> > > > > Management VNI MUST NOT >>> > > > > > be sent to a >>> tenant. VNI >>> > > number 1 is >>> > > > > RECOMMENDED as the >>> > > > > > default for >>> > Management VNI. >>> > > > > > >>> > > > > > With that new text, >>> what >>> > can be the >>> > > > value of >>> > > > > the destination >>> > > > > > MAC in the inner >>> Ethernet? I >>> > > tend to >>> > > > believe >>> > > > > that it can be >>> > > > > > anything and ignored >>> by the >>> > > reciever VTEP. >>> > > > > Also, if the >>> > > > > > trapping is based on >>> VNI >>> > > number, the >>> > > > > destination IP address >>> > > > > > of the inner IP packet >>> > can from >>> > > the range >>> > > > > 127/8 for IPv4, >>> > > > > > and for IPv6 from the >>> range >>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>> > > > > > lastly, the TTL to be >>> > set to 1 (no >>> > > > change here). >>> > > > > > >>> > > > > > Much appreciate your >>> > comments, >>> > > > questions, and >>> > > > > suggestions. >>> > > > > > >>> > > > > > Best regards, >>> > > > > > Greg >>> > > > > > >>> > > > > >>> > > > >>> > > >>> > >>> >> --00000000000057dae1058f39e101 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+SGkgRGluZXNoLDxkaXY+bWFueSB0aGFua3MgZm9yIHlvdXIgZGV0YWls ZWQgdXBkYXRlcyBvbiBob3cgc29tZSBpbXBsZW1lbnRhdGlvbnMgcHJvY2VzcyBWWExBTiBoZWFk ZXIgYW5kIHRoZSBpbm5lciBFdGhlcm5ldCBmcmFtZS4gVGhlc2UgYXJlIHZlcnkgaGVscGZ1bCBp biBhY2hpZXZpbmcgdGhlIHdvcmthYmxlIHNvbHV0aW9uIGZvciB0aGUgcHJvYmxlbSBhdCBoYW5k LjwvZGl2PjxkaXY+WW91JiMzOTt2ZSBub3RlZCB0aGF0IGEgcGF0aCBiZXR3ZWVuIFZURVBzIG1h eSBiZSBtb25pdG9yZWQgaW4gdGhlIHVuZGVybGF5IG5ldHdvcmsgYnkgbWVyZWx5IGVzdGFibGlz aGluZyBhIEJGRCBzZXNzaW9uLiBUaGF0IGlzIHRydWUsIGJ1dCBieSB1c2luZyBCRkQgd2l0aCBW 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autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id xUKdlOcM6XeM; Sun, 4 Aug 2019 09:07:37 -0700 (PDT) Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 425D3120025; Sun, 4 Aug 2019 09:07:37 -0700 (PDT) Received: by mail-wm1-x344.google.com with SMTP id h19so4975957wme.0; Sun, 04 Aug 2019 09:07:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=uiI10Rf8Y0l8hKHEviMoMKizOJ8hXQMpBUWHXd1DcpI=; b=AFjQ1QT3UovZJR+AcEGG5fmQJIiWOUxlKfhu9SJOCjCeLW/EeA5LnnaM+MJEdzy2kw 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X-Google-Smtp-Source: APXvYqyExWfslYKQrvIOIO5pOE7mHB0Ki8xwH06J5WUmmsJXsKSSVTxZM8tkp98xnvFjZRJRtH+vy5z24DbyMLWcR4U= X-Received: by 2002:a1c:a5c2:: with SMTP id o185mr14050019wme.172.1564934855554; Sun, 04 Aug 2019 09:07:35 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Dinesh Dutt Date: Sun, 4 Aug 2019 09:07:23 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Greg Mirsky Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000297cfb058f4ccac1" Archived-At: X-Mailman-Approved-At: Tue, 06 Aug 2019 05:08:06 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 04 Aug 2019 16:07:42 -0000 --000000000000297cfb058f4ccac1 Content-Type: text/plain; charset="UTF-8" Hi Greg, Thanks for your clarifications. I agree with your sentiment on why you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at all. All I was saying was pointing to the limitations of the use of management VNI. I spoke to some operators who're running EVPN and mentioned the discussion on this thread. They concur that they're using specific VNIs to test connectivity over that VNI between VTEPs to ensure misconfiguration doesn't lead to blackholes. My statements are based in real world operator experience. And I was providing language that ensured packets didn't leak across to tenants when they were destined to VTEPs. Dinesh On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky wrote: > Hi Dinesh, > many thanks for your detailed updates on how some implementations process > VXLAN header and the inner Ethernet frame. These are very helpful in > achieving the workable solution for the problem at hand. > You've noted that a path between VTEPs may be monitored in the underlay > network by merely establishing a BFD session. That is true, but by using > BFD with VXLAN encapsulation between the pair of VTEPs we are extending the > OAM domain by including, to some extent, VXLAN forwarding engine. Abstract > in RFC 5880 defines the goal and the domain in which BFD protocol can > detect a fault as: > This document describes a protocol intended to detect faults in the > bidirectional path between two forwarding engines, including > interfaces, data link(s), and to the extent possible the forwarding > engines themselves, with potentially very low latency. > Thus, BFD in the underlay will exercise a part of IP forwarding engine > while BFD with VXLAN encapsulation, ran between the same pair of VTEPs, > extends the OAM domain. At the same time, defining BFD between tenant > systems in outside the goal of this specification. But VXLAN BFD session > between VTEPs may be useful in monitoring e2e path between tenants, as > described in the update to -07: > At the same time, a service layer BFD session may be used between the > tenants of VTEPs IP1 and IP2 to provide end-to-end fault management. > In such case, for VTEPs BFD control packets of that session are > indistinguishable from data packets. If end-to-end defect detection > is realized as the set of concatenated OAM domains, e.g., VM1-1 - IP1 > -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD > follow the procedures described in Section 6.8.17 [RFC5880]. > I've attached the current working version of the draft. > > Regards, > Greg > > > On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: > >> What I mean is "How do you infer that it excludes the case I'm talking >> about?". >> >> Dinesh >> >> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: >> >>> The abstract reads this: " >>> >>> This document describes the use of the Bidirectional Forwarding >>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>> Area Network (VXLAN) tunnels forming up an overlay network." >>> >>> How do you infer what you said? >>> >>> Dinesh >>> >>> >>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern >>> wrote: >>> >>>> I am going by what the draft says its purpose is. If you (Dinesh) want >>>> the draft to fulfill a different purpose, then either ask the chairs to >>>> take this draft back to the WG, or write a separate draft. >>>> As currently written, the behavior Greg proposed meets the needs, and >>>> does so in a way that is consistent with VxLAN. >>>> >>>> Yours, >>>> Joel >>>> >>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>> > What is the stated purpose of this BFD session? The VTEP reachability >>>> is >>>> > determined by the underlay, I don't need VXLAN-encaped packet for >>>> that. >>>> > Do we agree? >>>> > >>>> > If I want to test the VXLAN encap/decap functionality alone, picking >>>> any >>>> > single VNI maybe fine. But is this all any network operator wants? >>>> Why? >>>> > In what situations has this been a problem? I suspect operators also >>>> > want to verify path continuity over a specific VNI. If you say this >>>> is >>>> > not defined by the document, I disagree because the current version >>>> > talks about controlling the number of BFD sessions between the VTEPs >>>> > (see section 3). More importantly, this is a real problem that >>>> operators >>>> > like to verify. >>>> > >>>> > Dinesh >>>> > >>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern >>> > > wrote: >>>> > >>>> > What is special about the management VNI is precisely that it is >>>> NOT a >>>> > tenant VNI. The VxLAN administration does know how it allocates >>>> VNI to >>>> > tenants, and which VNI it has allocated. In contrast, it does >>>> not know >>>> > which IP addresses or MAC adddresses teh tenant is using or may >>>> plan >>>> > to use. >>>> > >>>> > Yours, >>>> > Joel >>>> > >>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>> > > The assumption of an IP address within any VNI is suspect that >>>> way. >>>> > > What's special about a single VNI, the management VNI? The >>>> VTEP IP >>>> > > address does not belong in reality in any VNI. >>>> > > >>>> > > Dinesh >>>> > > >>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>> > >>>> > > >> >>>> wrote: >>>> > > >>>> > > Your response seems to miss two points: >>>> > > >>>> > > First, the problem you describe is not what the document >>>> says >>>> > it is >>>> > > solving. To the degree it discusses it at all, the >>>> document >>>> > says " >>>> > > In >>>> > > most cases, a single BFD session is sufficient for the >>>> given >>>> > VTEP to >>>> > > monitor the reachability of a remote VTEP, regardless of >>>> the >>>> > number of >>>> > > VNIs in common. " >>>> > > >>>> > > Second, you assume the existence of an IP address for a >>>> VTEP >>>> > within a >>>> > > VNI. As with the MAC address, the VTEP does not have an IP >>>> > address >>>> > > within the VNI. Some implementations may have created >>>> such a >>>> > thing, >>>> > > but >>>> > > the general construct, as defined to date, does not >>>> support such. >>>> > > >>>> > > In short, you are requiring a behavior that violates the >>>> > architectural >>>> > > structure of overlay / underlay separation, and common >>>> > usage. And you >>>> > > are doing so to support a use case that the working group >>>> has not >>>> > > indicated in the document as important. >>>> > > >>>> > > Yours, >>>> > > Joel >>>> > > >>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>> > > > Joel, >>>> > > > >>>> > > > You understood correctly. >>>> > > > >>>> > > > The VNIs may not share fate due to misconfiguration. >>>> And I >>>> > strongly >>>> > > > suspect someone will want to use BFD for that because >>>> its >>>> > about >>>> > > checking >>>> > > > path continuity as stated by the draft. As long as >>>> there's a >>>> > > valid IP >>>> > > > (because it's BFD) owned by the VTEP in that VNI, you >>>> can >>>> > use BFD in >>>> > > > that VNI. Thats all that you need to dictate. That IP >>>> address >>>> > > has a MAC >>>> > > > address and you can use that on the inner frame. That is >>>> > all normal >>>> > > > VXLAN processing. The outer IP is always that of the >>>> VTEP. >>>> > > > >>>> > > > Dinesh >>>> > > > >>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>> > > >>>> > > >>>> > > > >>> > >>>> > >>> >>>> wrote: >>>> > > > >>>> > > > If I am reading your various emails correctly Dinesh >>>> > (and I >>>> > > may have >>>> > > > missed something) you are trying to use the MAC >>>> address >>>> > > because you >>>> > > > want >>>> > > > to be able to send these BFD packets over arbitrary >>>> VNI to >>>> > > monitor the >>>> > > > VNI. That is not a requirement identified in the >>>> > document. >>>> > > It is not >>>> > > > even a problem I understand, since all the VNI >>>> between an >>>> > > ingress and >>>> > > > egress VTEP share fate. >>>> > > > >>>> > > > Yours, >>>> > > > Joel >>>> > > > >>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>> > > > > Thanks for verifying this. On Linux and hardware >>>> > routers >>>> > > that I'm >>>> > > > aware >>>> > > > > of (Cisco circa 2012 and Cumulus), the physical >>>> MAC >>>> > address is >>>> > > > reused >>>> > > > > across the VNIs on the VTEP. Did you check on a >>>> non-VMW >>>> > > device? >>>> > > > This is >>>> > > > > more for my own curiosity. >>>> > > > > >>>> > > > > To address the general case, can we not define a >>>> > > well-known (or >>>> > > > reserve >>>> > > > > one) unicast MAC address for use with VTEP? If >>>> the MAC >>>> > > address is >>>> > > > > configurable in BFD command, this can be moot. >>>> > > > > >>>> > > > > Dinesh >>>> > > > > >>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>>> > > > > >>> > >>>> > > >>> > > >>>> > > > >>> > >>>> > > >>> > >> >>>> > > > >>> > >>>> > > >>> > > >>>> > > > >>> > >>>> > > >>> > >>>> wrote: >>>> > > > > >>>> > > > > I have cross checked point raised about MAC >>>> address >>>> > > usage. It is >>>> > > > > possible that tenant could be using physical >>>> MAC >>>> > > address and >>>> > > > when a >>>> > > > > packet comes with valid VNI with a MAC >>>> address >>>> > that is >>>> > > being >>>> > > > used by >>>> > > > > tenant then packet will be sent to that >>>> tenant. >>>> > This rules >>>> > > > out the >>>> > > > > fact that we could use physical MAC address >>>> as >>>> > inner >>>> > > MAC to >>>> > > > ensure >>>> > > > > packets get terminated at VTEP itself. >>>> > > > > >>>> > > > > Thanks >>>> > > > > Santosh P K >>>> > > > > >>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K >>>> > > > > >>> > >>>> > > >>> > > >>>> > > > >>> > >>>> > > >>> > >> >>>> > > > >>> > >>>> > > >>> > > >>>> > > > >>> > >>>> > > >>> > >>>> >>>> > > > > wrote: >>>> > > > > >>>> > > > > Joel, >>>> > > > > Thanks for your inputs. I checked >>>> > > implementation within >>>> > > > > Vmware. Perhaps I should have been more >>>> clear >>>> > > about MAC >>>> > > > address >>>> > > > > space while checking internally. I will >>>> cross >>>> > > check again for >>>> > > > > the same and get back on this list. >>>> > > > > >>>> > > > > Thanks >>>> > > > > Santosh P K >>>> > > > > >>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. >>>> > Halpern >>>> > > > > >>> > >>> > > >>>> > > >>>> > >> >>>> > > > >>> > >>> > > >>>> > > >>>> > >>>> >>>> wrote: >>>> > > > > >>>> > > > > Sorry to ask a stupid question. >>>> Whose >>>> > > implementation? >>>> > > > > >>>> > > > > The reason I ask is that as far as I >>>> > can tell, >>>> > > since the >>>> > > > > tenant does not >>>> > > > > have any control access to the VTEP, >>>> > there is no >>>> > > > reason for >>>> > > > > the VTEP to >>>> > > > > have a MAC address in the tenant >>>> > space. Yes, the >>>> > > > device has >>>> > > > > a physical >>>> > > > > MAC address. But the tenant could >>>> well be >>>> > > using that MAC >>>> > > > > address. Yes, >>>> > > > > they would be violating the Ethernet >>>> spec. >>>> > > But the whole >>>> > > > > point of >>>> > > > > segregation is not to care about such >>>> > issues. >>>> > > > > >>>> > > > > On the other hand, if you tell me >>>> that >>>> > the VMWare >>>> > > > > implementation has an >>>> > > > > Ethernet address that is part of the >>>> tenant >>>> > > space, well, >>>> > > > > they made up >>>> > > > > this particular game. >>>> > > > > >>>> > > > > Yours, >>>> > > > > Joel >>>> > > > > >>>> > > > > On 7/31/2019 1:44 PM, Santosh P K >>>> wrote: >>>> > > > > > I have checked with implementation >>>> > in data >>>> > > path. >>>> > > > When we >>>> > > > > receive a >>>> > > > > > packet with valid VNI then lookup >>>> > for MAC will >>>> > > > happen and >>>> > > > > it is VTEP own >>>> > > > > > MAC then it will be trapped to >>>> control >>>> > > plane for >>>> > > > > processing. I think we >>>> > > > > > can have following options >>>> > > > > > 1. Optional managment VNI >>>> > > > > > 2. Mandatory inner MAC set to >>>> VTEP mac >>>> > > > > > 3. Inner IP TTL set to 1 to avoid >>>> > > forwarding of packet >>>> > > > > via inner IP >>>> > > > > > address. >>>> > > > > > >>>> > > > > > >>>> > > > > > Thoughts? >>>> > > > > > >>>> > > > > > Thansk >>>> > > > > > Santosh P K >>>> > > > > > >>>> > > > > > On Wed, Jul 31, 2019 at 9:20 AM >>>> Greg >>>> > Mirsky >>>> > > > > >>> > >>>> > > >>> gregimirsky@gmail.com>> >>>> > >>>> > > >>> gregimirsky@gmail.com>>> >>>> > > > >>> > >>> > > >>>> > > >>> gregimirsky@gmail.com> >>>> > >>> >>>> > > > > > >>> > >>>> > > >>> gregimirsky@gmail.com>> >>>> > > > >>> > >>> > >> >>>> > > > > >>> > >>>> > > >>> gregimirsky@gmail.com>> >>>> > > > >>> > >>>> > > >>> > >>>>> wrote: >>>> > > > > > >>>> > > > > > Hi Dinesh, >>>> > > > > > thank you for your >>>> consideration >>>> > of the >>>> > > > proposal and >>>> > > > > questions. What >>>> > > > > > would you see as the scope of >>>> > testing the >>>> > > > > connectivity for the >>>> > > > > > specific VNI? If it is >>>> > > tenant-to-tenant, then >>>> > > > VTEPs >>>> > > > > will treat these >>>> > > > > > packets as regular user >>>> frames. More >>>> > > likely, these >>>> > > > > could be Layer 2 >>>> > > > > > OAM, e.g. CCM frames. The >>>> reason >>>> > to use >>>> > > 127/8 for >>>> > > > > IPv4, and >>>> > > > > > 0:0:0:0:0:FFFF:7F00:0/104 for >>>> > IPv6 is >>>> > > to safeguard >>>> > > > > from leaking >>>> > > > > > Ethernet frames with BFD >>>> Control >>>> > packet >>>> > > to a >>>> > > > tenant. >>>> > > > > > You've suggested using a MAC >>>> > address to >>>> > > trap the >>>> > > > > control packet at >>>> > > > > > VTEP. What that address could >>>> be? We >>>> > > had proposed >>>> > > > > using the >>>> > > > > > dedicated MAC and VTEP's MAC >>>> and >>>> > both >>>> > > raised >>>> > > > concerns >>>> > > > > among VXLAN >>>> > > > > > experts. The idea of using >>>> > Management >>>> > > VNI may >>>> > > > be more >>>> > > > > acceptable >>>> > > > > > based on its similarity to the >>>> > practice >>>> > > of using >>>> > > > > Management VLAN. >>>> > > > > > >>>> > > > > > Regards, >>>> > > > > > Greg >>>> > > > > > >>>> > > > > > On Wed, Jul 31, 2019 at 12:03 >>>> PM >>>> > Dinesh >>>> > > Dutt >>>> > > > > >>> > >>> > > >>>> > > >>>> > >> >>>> > > > >>>> > > >>>> > > >>>> > >>> >>>> > > > > > >>> > >>>> > > > >>>> > > > >>>> > >> >>>> > > >>>> > > >>>> > > > >>>> > >>>>> >>>> > > > > wrote: >>>> > > > > > >>>> > > > > > Hi Greg, >>>> > > > > > >>>> > > > > > As long as the inner MAC >>>> > address is >>>> > > such >>>> > > > that the >>>> > > > > packet is >>>> > > > > > trapped to the CPU, it >>>> should be >>>> > > fine for >>>> > > > use as >>>> > > > > an inner MAC is >>>> > > > > > it not? Stating that is >>>> > better than >>>> > > trying to >>>> > > > > force a management >>>> > > > > > VNI. What if someone wants >>>> > to test >>>> > > > connectivity >>>> > > > > on a specific >>>> > > > > > VNI? I would not pick a >>>> > loopback IP >>>> > > > address for >>>> > > > > this since that >>>> > > > > > address range is >>>> host/node local >>>> > > only. Is >>>> > > > there a >>>> > > > > reason you're >>>> > > > > > not using the VTEP IP as >>>> the >>>> > inner IP >>>> > > > address ? >>>> > > > > > >>>> > > > > > Dinesh >>>> > > > > > >>>> > > > > > On Wed, Jul 31, 2019 at >>>> 5:48 AM >>>> > > Greg Mirsky >>>> > > > > > >>> > >>>> > > >>> gregimirsky@gmail.com>> >>>> > > > >>> > >>> > >> >>>> > > > > >>> > >>>> > > >>> gregimirsky@gmail.com>> >>>> > > > >>> > >>>> > > >>> > >>> >>> > >>>> > > >>> gregimirsky@gmail.com>> >>>> > > > >>> > >>> > >> >>>> > > > > >>> > >>>> > > >>> gregimirsky@gmail.com>> >>>> > > > >>> > >>>> > > >>> > >>>>> wrote: >>>> > > > > > >>>> > > > > > Dear All, >>>> > > > > > thank you for your >>>> comments, >>>> > > > suggestions on >>>> > > > > this issue, >>>> > > > > > probably the most >>>> > challenging >>>> > > for this >>>> > > > > specification. In the >>>> > > > > > course of our >>>> discussions, >>>> > > we've agreed to >>>> > > > > abandon the >>>> > > > > > request to allocate >>>> the >>>> > > dedicated MAC >>>> > > > address >>>> > > > > to be used as >>>> > > > > > the destination MAC >>>> > address in >>>> > > the inner >>>> > > > > Ethernet frame. >>>> > > > > > Also, earlier using >>>> VNI >>>> > 0 was >>>> > > changed from >>>> > > > > mandatory to one >>>> > > > > > of the options an >>>> > > implementation may >>>> > > > offer to >>>> > > > > an operator. >>>> > > > > > The most recent >>>> > discussion was >>>> > > whether >>>> > > > VTEP's >>>> > > > > MAC address >>>> > > > > > might be used as the >>>> > > destination MAC >>>> > > > address >>>> > > > > in the inner >>>> > > > > > Ethernet frame. As I >>>> > recall it, the >>>> > > > comments >>>> > > > > from VXLAN >>>> > > > > > experts equally split >>>> > with one >>>> > > for it >>>> > > > and one >>>> > > > > against. Hence >>>> > > > > > I would like to >>>> propose >>>> > a new >>>> > > text to >>>> > > > resolve >>>> > > > > the issue. The >>>> > > > > > idea is to let an >>>> > operator select >>>> > > > Management >>>> > > > > VNI and use >>>> > > > > > that VNI in VXLAN >>>> > encapsulation >>>> > > of BFD >>>> > > > > Control packets: >>>> > > > > > NEW TEXT: >>>> > > > > > >>>> > > > > > An operator MUST >>>> > select a VNI >>>> > > > number to >>>> > > > > be used as >>>> > > > > > Management VNI. >>>> VXLAN >>>> > > packet for >>>> > > > > Management VNI MUST NOT >>>> > > > > > be sent to a >>>> tenant. VNI >>>> > > number 1 is >>>> > > > > RECOMMENDED as the >>>> > > > > > default for >>>> > Management VNI. >>>> > > > > > >>>> > > > > > With that new text, >>>> what >>>> > can be the >>>> > > > value of >>>> > > > > the destination >>>> > > > > > MAC in the inner >>>> Ethernet? I >>>> > > tend to >>>> > > > believe >>>> > > > > that it can be >>>> > > > > > anything and ignored >>>> by the >>>> > > reciever VTEP. >>>> > > > > Also, if the >>>> > > > > > trapping is based on >>>> VNI >>>> > > number, the >>>> > > > > destination IP address >>>> > > > > > of the inner IP packet >>>> > can from >>>> > > the range >>>> > > > > 127/8 for IPv4, >>>> > > > > > and for IPv6 from the >>>> range >>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>> > > > > > lastly, the TTL to be >>>> > set to 1 (no >>>> > > > change here). >>>> > > > > > >>>> > > > > > Much appreciate your >>>> > comments, >>>> > > > questions, and >>>> > > > > suggestions. >>>> > > > > > >>>> > > > > > Best regards, >>>> > > > > > Greg >>>> > > > > > >>>> > > > > >>>> > > > >>>> > > >>>> > >>>> >>> --000000000000297cfb058f4ccac1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj5IaSBHcmVnLDwvZGl2PjxkaXY+PGJyPjwvZGl2PjxkaXY+VGhh bmtzIGZvciB5b3VyIGNsYXJpZmljYXRpb25zLiBJIGFncmVlIHdpdGggeW91ciBzZW50aW1lbnQg b24gd2h5IHlvdSYjMzk7cmUgcnVubmluZyBCRkQgb3ZlciBWWExBTiBiZXR3ZWVuIFZURVBzLiBJ IHdhc24mIzM5O3QgYXJndWluZyBhZ2FpbnN0IGl0IGF0IGFsbC4gQWxsIEkgd2FzIHNheWluZyB3 YXMgcG9pbnRpbmcgdG8gdGhlIGxpbWl0YXRpb25zIG9mIHRoZSB1c2Ugb2YgbWFuYWdlbWVudCBW TkkuIEkgc3Bva2UgdG8gc29tZSBvcGVyYXRvcnMgd2hvJiMzOTtyZSBydW5uaW5nIEVWUE4gYW5k IG1lbnRpb25lZCB0aGUgZGlzY3Vzc2lvbiBvbiB0aGlzIHRocmVhZC4gVGhleSBjb25jdXIgdGhh 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Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000664553058f65e557" Archived-At: X-Mailman-Approved-At: Tue, 06 Aug 2019 05:08:06 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Aug 2019 22:04:55 -0000 --000000000000664553058f65e557 Content-Type: text/plain; charset="UTF-8" Hi Dinesh, what do you see as the way forward? I agree, that the proposed text doesn't work for multi-VNI concurrent monitoring because these VNIs are tenant's VNIs. And in that case, we need to specify another mechanism to trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address must be used as the destination MAC address in the inner Ethernet frame. The destination IP address may be either VTEP's address of martian (I do prefer martian). Let me give it try: NEW TEXT: To monitor continuity of the path between two VTEPs, an operator MUST select a VNI number to be used as Management VNI. Management VNI number MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the default for Management VNI. [Ed.note: What we set the Destination MAC to? Can it be invalid MAC that MUST be ignored on receipt?] If an implementation supports concurrent monitoring of multiple VNIs, then the value of VNI number MAY be one of tenant's VNIs. The destination MAC address in the inner Ethernet frame encapsulating BFD Control packet MUST be MAC associated with the remote VTEP. The destination IP address of the inner IP packet MUST be selected from the range 127/8 for IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set to 1. Regards, Greg On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: > Hi Greg, > > Thanks for your clarifications. I agree with your sentiment on why you're > running BFD over VXLAN between VTEPs. I wasn't arguing against it at all. > All I was saying was pointing to the limitations of the use of management > VNI. I spoke to some operators who're running EVPN and mentioned the > discussion on this thread. They concur that they're using specific VNIs to > test connectivity over that VNI between VTEPs to ensure misconfiguration > doesn't lead to blackholes. My statements are based in real world operator > experience. And I was providing language that ensured packets didn't leak > across to tenants when they were destined to VTEPs. > > Dinesh > > On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky wrote: > >> Hi Dinesh, >> many thanks for your detailed updates on how some implementations process >> VXLAN header and the inner Ethernet frame. These are very helpful in >> achieving the workable solution for the problem at hand. >> You've noted that a path between VTEPs may be monitored in the underlay >> network by merely establishing a BFD session. That is true, but by using >> BFD with VXLAN encapsulation between the pair of VTEPs we are extending the >> OAM domain by including, to some extent, VXLAN forwarding engine. Abstract >> in RFC 5880 defines the goal and the domain in which BFD protocol can >> detect a fault as: >> This document describes a protocol intended to detect faults in the >> bidirectional path between two forwarding engines, including >> interfaces, data link(s), and to the extent possible the forwarding >> engines themselves, with potentially very low latency. >> Thus, BFD in the underlay will exercise a part of IP forwarding engine >> while BFD with VXLAN encapsulation, ran between the same pair of VTEPs, >> extends the OAM domain. At the same time, defining BFD between tenant >> systems in outside the goal of this specification. But VXLAN BFD session >> between VTEPs may be useful in monitoring e2e path between tenants, as >> described in the update to -07: >> At the same time, a service layer BFD session may be used between the >> tenants of VTEPs IP1 and IP2 to provide end-to-end fault management. >> In such case, for VTEPs BFD control packets of that session are >> indistinguishable from data packets. If end-to-end defect detection >> is realized as the set of concatenated OAM domains, e.g., VM1-1 - IP1 >> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD >> follow the procedures described in Section 6.8.17 [RFC5880]. >> I've attached the current working version of the draft. >> >> Regards, >> Greg >> >> >> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: >> >>> What I mean is "How do you infer that it excludes the case I'm talking >>> about?". >>> >>> Dinesh >>> >>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: >>> >>>> The abstract reads this: " >>>> >>>> This document describes the use of the Bidirectional Forwarding >>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>> >>>> How do you infer what you said? >>>> >>>> Dinesh >>>> >>>> >>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern >>>> wrote: >>>> >>>>> I am going by what the draft says its purpose is. If you (Dinesh) >>>>> want >>>>> the draft to fulfill a different purpose, then either ask the chairs >>>>> to >>>>> take this draft back to the WG, or write a separate draft. >>>>> As currently written, the behavior Greg proposed meets the needs, and >>>>> does so in a way that is consistent with VxLAN. >>>>> >>>>> Yours, >>>>> Joel >>>>> >>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>> > What is the stated purpose of this BFD session? The VTEP >>>>> reachability is >>>>> > determined by the underlay, I don't need VXLAN-encaped packet for >>>>> that. >>>>> > Do we agree? >>>>> > >>>>> > If I want to test the VXLAN encap/decap functionality alone, picking >>>>> any >>>>> > single VNI maybe fine. But is this all any network operator wants? >>>>> Why? >>>>> > In what situations has this been a problem? I suspect operators also >>>>> > want to verify path continuity over a specific VNI. If you say this >>>>> is >>>>> > not defined by the document, I disagree because the current version >>>>> > talks about controlling the number of BFD sessions between the VTEPs >>>>> > (see section 3). More importantly, this is a real problem that >>>>> operators >>>>> > like to verify. >>>>> > >>>>> > Dinesh >>>>> > >>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern >>>> > > wrote: >>>>> > >>>>> > What is special about the management VNI is precisely that it is >>>>> NOT a >>>>> > tenant VNI. The VxLAN administration does know how it allocates >>>>> VNI to >>>>> > tenants, and which VNI it has allocated. In contrast, it does >>>>> not know >>>>> > which IP addresses or MAC adddresses teh tenant is using or may >>>>> plan >>>>> > to use. >>>>> > >>>>> > Yours, >>>>> > Joel >>>>> > >>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>> > > The assumption of an IP address within any VNI is suspect >>>>> that way. >>>>> > > What's special about a single VNI, the management VNI? The >>>>> VTEP IP >>>>> > > address does not belong in reality in any VNI. >>>>> > > >>>>> > > Dinesh >>>>> > > >>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>> > >>>>> > > >> >>>>> wrote: >>>>> > > >>>>> > > Your response seems to miss two points: >>>>> > > >>>>> > > First, the problem you describe is not what the document >>>>> says >>>>> > it is >>>>> > > solving. To the degree it discusses it at all, the >>>>> document >>>>> > says " >>>>> > > In >>>>> > > most cases, a single BFD session is sufficient for the >>>>> given >>>>> > VTEP to >>>>> > > monitor the reachability of a remote VTEP, regardless of >>>>> the >>>>> > number of >>>>> > > VNIs in common. " >>>>> > > >>>>> > > Second, you assume the existence of an IP address for a >>>>> VTEP >>>>> > within a >>>>> > > VNI. As with the MAC address, the VTEP does not have an >>>>> IP >>>>> > address >>>>> > > within the VNI. Some implementations may have created >>>>> such a >>>>> > thing, >>>>> > > but >>>>> > > the general construct, as defined to date, does not >>>>> support such. >>>>> > > >>>>> > > In short, you are requiring a behavior that violates the >>>>> > architectural >>>>> > > structure of overlay / underlay separation, and common >>>>> > usage. And you >>>>> > > are doing so to support a use case that the working group >>>>> has not >>>>> > > indicated in the document as important. >>>>> > > >>>>> > > Yours, >>>>> > > Joel >>>>> > > >>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>> > > > Joel, >>>>> > > > >>>>> > > > You understood correctly. >>>>> > > > >>>>> > > > The VNIs may not share fate due to misconfiguration. >>>>> And I >>>>> > strongly >>>>> > > > suspect someone will want to use BFD for that because >>>>> its >>>>> > about >>>>> > > checking >>>>> > > > path continuity as stated by the draft. As long as >>>>> there's a >>>>> > > valid IP >>>>> > > > (because it's BFD) owned by the VTEP in that VNI, you >>>>> can >>>>> > use BFD in >>>>> > > > that VNI. Thats all that you need to dictate. That IP >>>>> address >>>>> > > has a MAC >>>>> > > > address and you can use that on the inner frame. That >>>>> is >>>>> > all normal >>>>> > > > VXLAN processing. The outer IP is always that of the >>>>> VTEP. >>>>> > > > >>>>> > > > Dinesh >>>>> > > > >>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>> > > >>>>> > > >>>>> > > > >>>> jmh@joelhalpern.com> >>>>> > >>> >>>>> wrote: >>>>> > > > >>>>> > > > If I am reading your various emails correctly >>>>> Dinesh >>>>> > (and I >>>>> > > may have >>>>> > > > missed something) you are trying to use the MAC >>>>> address >>>>> > > because you >>>>> > > > want >>>>> > > > to be able to send these BFD packets over >>>>> arbitrary VNI to >>>>> > > monitor the >>>>> > > > VNI. That is not a requirement identified in the >>>>> > document. >>>>> > > It is not >>>>> > > > even a problem I understand, since all the VNI >>>>> between an >>>>> > > ingress and >>>>> > > > egress VTEP share fate. >>>>> > > > >>>>> > > > Yours, >>>>> > > > Joel >>>>> > > > >>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>> > > > > Thanks for verifying this. On Linux and hardware >>>>> > routers >>>>> > > that I'm >>>>> > > > aware >>>>> > > > > of (Cisco circa 2012 and Cumulus), the physical >>>>> MAC >>>>> > address is >>>>> > > > reused >>>>> > > > > across the VNIs on the VTEP. Did you check on a >>>>> non-VMW >>>>> > > device? >>>>> > > > This is >>>>> > > > > more for my own curiosity. >>>>> > > > > >>>>> > > > > To address the general case, can we not define a >>>>> > > well-known (or >>>>> > > > reserve >>>>> > > > > one) unicast MAC address for use with VTEP? If >>>>> the MAC >>>>> > > address is >>>>> > > > > configurable in BFD command, this can be moot. >>>>> > > > > >>>>> > > > > Dinesh >>>>> > > > > >>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>>>> > > > > >>>> > >>>>> > > >>>> > > >>>>> > > > >>>> > >>>>> > > >>>> > >> >>>>> > > > >>>> > >>>>> > > >>>> > > >>>>> > > > >>>> > >>>>> > > >>>> > >>>> wrote: >>>>> > > > > >>>>> > > > > I have cross checked point raised about MAC >>>>> address >>>>> > > usage. It is >>>>> > > > > possible that tenant could be using >>>>> physical MAC >>>>> > > address and >>>>> > > > when a >>>>> > > > > packet comes with valid VNI with a MAC >>>>> address >>>>> > that is >>>>> > > being >>>>> > > > used by >>>>> > > > > tenant then packet will be sent to that >>>>> tenant. >>>>> > This rules >>>>> > > > out the >>>>> > > > > fact that we could use physical MAC address >>>>> as >>>>> > inner >>>>> > > MAC to >>>>> > > > ensure >>>>> > > > > packets get terminated at VTEP itself. >>>>> > > > > >>>>> > > > > Thanks >>>>> > > > > Santosh P K >>>>> > > > > >>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P K >>>>> > > > > >>>> > >>>>> > > >>>> > > >>>>> > > > >>>> > >>>>> > > >>>> > >> >>>>> > > > >>>> > >>>>> > > >>>> > > >>>>> > > > >>>> > >>>>> > > >>>> > >>>> >>>>> > > > > wrote: >>>>> > > > > >>>>> > > > > Joel, >>>>> > > > > Thanks for your inputs. I checked >>>>> > > implementation within >>>>> > > > > Vmware. Perhaps I should have been more >>>>> clear >>>>> > > about MAC >>>>> > > > address >>>>> > > > > space while checking internally. I will >>>>> cross >>>>> > > check again for >>>>> > > > > the same and get back on this list. >>>>> > > > > >>>>> > > > > Thanks >>>>> > > > > Santosh P K >>>>> > > > > >>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel M. >>>>> > Halpern >>>>> > > > > >>>> > >>>> > > >>>>> > > >>>>> > >> >>>>> > > > >>>> > >>>> > > >>>>> > > >>>>> > >>>> >>>>> wrote: >>>>> > > > > >>>>> > > > > Sorry to ask a stupid question. >>>>> Whose >>>>> > > implementation? >>>>> > > > > >>>>> > > > > The reason I ask is that as far as I >>>>> > can tell, >>>>> > > since the >>>>> > > > > tenant does not >>>>> > > > > have any control access to the VTEP, >>>>> > there is no >>>>> > > > reason for >>>>> > > > > the VTEP to >>>>> > > > > have a MAC address in the tenant >>>>> > space. Yes, the >>>>> > > > device has >>>>> > > > > a physical >>>>> > > > > MAC address. But the tenant could >>>>> well be >>>>> > > using that MAC >>>>> > > > > address. Yes, >>>>> > > > > they would be violating the >>>>> Ethernet spec. >>>>> > > But the whole >>>>> > > > > point of >>>>> > > > > segregation is not to care about >>>>> such >>>>> > issues. >>>>> > > > > >>>>> > > > > On the other hand, if you tell me >>>>> that >>>>> > the VMWare >>>>> > > > > implementation has an >>>>> > > > > Ethernet address that is part of >>>>> the tenant >>>>> > > space, well, >>>>> > > > > they made up >>>>> > > > > this particular game. >>>>> > > > > >>>>> > > > > Yours, >>>>> > > > > Joel >>>>> > > > > >>>>> > > > > On 7/31/2019 1:44 PM, Santosh P K >>>>> wrote: >>>>> > > > > > I have checked with >>>>> implementation >>>>> > in data >>>>> > > path. >>>>> > > > When we >>>>> > > > > receive a >>>>> > > > > > packet with valid VNI then lookup >>>>> > for MAC will >>>>> > > > happen and >>>>> > > > > it is VTEP own >>>>> > > > > > MAC then it will be trapped to >>>>> control >>>>> > > plane for >>>>> > > > > processing. I think we >>>>> > > > > > can have following options >>>>> > > > > > 1. Optional managment VNI >>>>> > > > > > 2. Mandatory inner MAC set to >>>>> VTEP mac >>>>> > > > > > 3. Inner IP TTL set to 1 to avoid >>>>> > > forwarding of packet >>>>> > > > > via inner IP >>>>> > > > > > address. >>>>> > > > > > >>>>> > > > > > >>>>> > > > > > Thoughts? >>>>> > > > > > >>>>> > > > > > Thansk >>>>> > > > > > Santosh P K >>>>> > > > > > >>>>> > > > > > On Wed, Jul 31, 2019 at 9:20 AM >>>>> Greg >>>>> > Mirsky >>>>> > > > > >>>> > >>>>> > > >>>> gregimirsky@gmail.com>> >>>>> > >>>>> > > >>>> gregimirsky@gmail.com>>> >>>>> > > > >>>> > >>>> > > >>>>> > > >>>> gregimirsky@gmail.com> >>>>> > >>> >>>>> > > > > > >>>> > >>>>> > > >>>> gregimirsky@gmail.com>> >>>>> > > > >>>> > >>>> > >> >>>>> > > > > >>>> > >>>>> > > >>>> gregimirsky@gmail.com>> >>>>> > > > >>>> > >>>>> > > >>>> > >>>>> wrote: >>>>> > > > > > >>>>> > > > > > Hi Dinesh, >>>>> > > > > > thank you for your >>>>> consideration >>>>> > of the >>>>> > > > proposal and >>>>> > > > > questions. What >>>>> > > > > > would you see as the scope of >>>>> > testing the >>>>> > > > > connectivity for the >>>>> > > > > > specific VNI? If it is >>>>> > > tenant-to-tenant, then >>>>> > > > VTEPs >>>>> > > > > will treat these >>>>> > > > > > packets as regular user >>>>> frames. More >>>>> > > likely, these >>>>> > > > > could be Layer 2 >>>>> > > > > > OAM, e.g. CCM frames. The >>>>> reason >>>>> > to use >>>>> > > 127/8 for >>>>> > > > > IPv4, and >>>>> > > > > > 0:0:0:0:0:FFFF:7F00:0/104 for >>>>> > IPv6 is >>>>> > > to safeguard >>>>> > > > > from leaking >>>>> > > > > > Ethernet frames with BFD >>>>> Control >>>>> > packet >>>>> > > to a >>>>> > > > tenant. >>>>> > > > > > You've suggested using a MAC >>>>> > address to >>>>> > > trap the >>>>> > > > > control packet at >>>>> > > > > > VTEP. What that address >>>>> could be? We >>>>> > > had proposed >>>>> > > > > using the >>>>> > > > > > dedicated MAC and VTEP's MAC >>>>> and >>>>> > both >>>>> > > raised >>>>> > > > concerns >>>>> > > > > among VXLAN >>>>> > > > > > experts. The idea of using >>>>> > Management >>>>> > > VNI may >>>>> > > > be more >>>>> > > > > acceptable >>>>> > > > > > based on its similarity to >>>>> the >>>>> > practice >>>>> > > of using >>>>> > > > > Management VLAN. >>>>> > > > > > >>>>> > > > > > Regards, >>>>> > > > > > Greg >>>>> > > > > > >>>>> > > > > > On Wed, Jul 31, 2019 at >>>>> 12:03 PM >>>>> > Dinesh >>>>> > > Dutt >>>>> > > > > >>>> > >>>> > > >>>>> > > >>>>> > >> >>>>> > > > >>>>> > > >>>>> > > >>>>> > >>> >>>>> > > > > > >>>> > >>>>> > > > >>>>> > > > >>>>> > >> >>>>> > > >>>>> > > >>>>> > > > >>>>> > >>>>> >>>>> > > > > wrote: >>>>> > > > > > >>>>> > > > > > Hi Greg, >>>>> > > > > > >>>>> > > > > > As long as the inner MAC >>>>> > address is >>>>> > > such >>>>> > > > that the >>>>> > > > > packet is >>>>> > > > > > trapped to the CPU, it >>>>> should be >>>>> > > fine for >>>>> > > > use as >>>>> > > > > an inner MAC is >>>>> > > > > > it not? Stating that is >>>>> > better than >>>>> > > trying to >>>>> > > > > force a management >>>>> > > > > > VNI. What if someone >>>>> wants >>>>> > to test >>>>> > > > connectivity >>>>> > > > > on a specific >>>>> > > > > > VNI? I would not pick a >>>>> > loopback IP >>>>> > > > address for >>>>> > > > > this since that >>>>> > > > > > address range is >>>>> host/node local >>>>> > > only. Is >>>>> > > > there a >>>>> > > > > reason you're >>>>> > > > > > not using the VTEP IP as >>>>> the >>>>> > inner IP >>>>> > > > address ? >>>>> > > > > > >>>>> > > > > > Dinesh >>>>> > > > > > >>>>> > > > > > On Wed, Jul 31, 2019 at >>>>> 5:48 AM >>>>> > > Greg Mirsky >>>>> > > > > > >>>> > >>>>> > > >>>> gregimirsky@gmail.com>> >>>>> > > > >>>> > >>>> > >> >>>>> > > > > >>>> > >>>>> > > >>>> gregimirsky@gmail.com>> >>>>> > > > >>>> > >>>>> > > >>>> > >>> >>>> > >>>>> > > >>>> gregimirsky@gmail.com>> >>>>> > > > >>>> > >>>> > >> >>>>> > > > > >>>> > >>>>> > > >>>> gregimirsky@gmail.com>> >>>>> > > > >>>> > >>>>> > > >>>> > >>>>> wrote: >>>>> > > > > > >>>>> > > > > > Dear All, >>>>> > > > > > thank you for your >>>>> comments, >>>>> > > > suggestions on >>>>> > > > > this issue, >>>>> > > > > > probably the most >>>>> > challenging >>>>> > > for this >>>>> > > > > specification. In the >>>>> > > > > > course of our >>>>> discussions, >>>>> > > we've agreed to >>>>> > > > > abandon the >>>>> > > > > > request to allocate >>>>> the >>>>> > > dedicated MAC >>>>> > > > address >>>>> > > > > to be used as >>>>> > > > > > the destination MAC >>>>> > address in >>>>> > > the inner >>>>> > > > > Ethernet frame. >>>>> > > > > > Also, earlier using >>>>> VNI >>>>> > 0 was >>>>> > > changed from >>>>> > > > > mandatory to one >>>>> > > > > > of the options an >>>>> > > implementation may >>>>> > > > offer to >>>>> > > > > an operator. >>>>> > > > > > The most recent >>>>> > discussion was >>>>> > > whether >>>>> > > > VTEP's >>>>> > > > > MAC address >>>>> > > > > > might be used as the >>>>> > > destination MAC >>>>> > > > address >>>>> > > > > in the inner >>>>> > > > > > Ethernet frame. As I >>>>> > recall it, the >>>>> > > > comments >>>>> > > > > from VXLAN >>>>> > > > > > experts equally split >>>>> > with one >>>>> > > for it >>>>> > > > and one >>>>> > > > > against. Hence >>>>> > > > > > I would like to >>>>> propose >>>>> > a new >>>>> > > text to >>>>> > > > resolve >>>>> > > > > the issue. The >>>>> > > > > > idea is to let an >>>>> > operator select >>>>> > > > Management >>>>> > > > > VNI and use >>>>> > > > > > that VNI in VXLAN >>>>> > encapsulation >>>>> > > of BFD >>>>> > > > > Control packets: >>>>> > > > > > NEW TEXT: >>>>> > > > > > >>>>> > > > > > An operator MUST >>>>> > select a VNI >>>>> > > > number to >>>>> > > > > be used as >>>>> > > > > > Management VNI. >>>>> VXLAN >>>>> > > packet for >>>>> > > > > Management VNI MUST NOT >>>>> > > > > > be sent to a >>>>> tenant. VNI >>>>> > > number 1 is >>>>> > > > > RECOMMENDED as the >>>>> > > > > > default for >>>>> > Management VNI. >>>>> > > > > > >>>>> > > > > > With that new text, >>>>> what >>>>> > can be the >>>>> > > > value of >>>>> > > > > the destination >>>>> > > > > > MAC in the inner >>>>> Ethernet? I >>>>> > > tend to >>>>> > > > believe >>>>> > > > > that it can be >>>>> > > > > > anything and ignored >>>>> by the >>>>> > > reciever VTEP. >>>>> > > > > Also, if the >>>>> > > > > > trapping is based on >>>>> VNI >>>>> > > number, the >>>>> > > > > destination IP address >>>>> > > > > > of the inner IP >>>>> packet >>>>> > can from >>>>> > > the range >>>>> > > > > 127/8 for IPv4, >>>>> > > > > > and for IPv6 from >>>>> the range >>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>>> > > > > > lastly, the TTL to be >>>>> > set to 1 (no >>>>> > > > change here). >>>>> > > > > > >>>>> > > > > > Much appreciate your >>>>> > comments, >>>>> > > > questions, and >>>>> > > > > suggestions. >>>>> > > > > > >>>>> > > > > > Best regards, >>>>> > > > > > Greg >>>>> > > > > > >>>>> > > > > >>>>> > > > >>>>> > > >>>>> > >>>>> >>>> --000000000000664553058f65e557 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdiBkaXI9Imx0ciI+SGkgRGluZXNoLDxkaXY+d2hhdCBkbyB5b3Ug c2VlIGFzIHRoZSB3YXkgZm9yd2FyZD8gSSBhZ3JlZSwgdGhhdCB0aGUgcHJvcG9zZWQgdGV4dCBk b2VzbiYjMzk7dCB3b3JrIGZvciBtdWx0aS1WTkkgY29uY3VycmVudCBtb25pdG9yaW5nIGJlY2F1 c2UgdGhlc2UgVk5JcyBhcmUgdGVuYW50JiMzOTtzIFZOSXMuIEFuZCBpbiB0aGF0IGNhc2UsIHdl IG5lZWQgdG8gc3BlY2lmeSBhbm90aGVyIG1lY2hhbmlzbSB0byB0cmFwIHRoZSBCRkQgQ29udHJv bCBwYWNrZXQgYXQgVlRFUC4gSXQgc2VlbXMgdGhhdCBWVEVQJiMzOTtzIEV0aGVybmV0IGFkZHJl c3MgbXVzdCBiZSB1c2VkIGFzIHRoZSBkZXN0aW5hdGlvbiBNQUMgYWRkcmVzcyBpbiB0aGUgaW5u 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h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=l/5PIiZZBGxMJNFp/JmCTzGBYZm92FSjrkiaUaUawVM=; b=h4op5rEh1pvzG7troaWb44hLWuSLZsUp++49uLWmW1evqtEBKfQfZX6n/z11lZHVuJ ClXiUtPyWZ7O5d5pFOj2GRy8OKezJdqkz59OrKt9LEBiC9MuLSH9zxsCX/xbgRCsi4by iNS+plYlwDe01bhJ8MKunHBhRKX+/gd1v4evwW7UdJ45JHwYYm7B6ROtjajI8g/OtTNt u2nRf9eF3A25Wp72D101XT5dTT5zWrhS8r+VKrz3oan0YcTZCTRxWLN9fEEJuASbTcJn bMBO/pGc5FsioVNDlGNiTRN8NeKyM1/9YsL8uqV0h35OSlZmJ5kT6NwfRb0I1su3bUuD um5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=l/5PIiZZBGxMJNFp/JmCTzGBYZm92FSjrkiaUaUawVM=; b=eRlC8n96YBA4vtmwZxVIT6UXbKWFk93Xscwd8ZOV2bvwlgLXCz8MzlTBG+CLeSnF42 y+jnS2oR3zZLVF2Rh9nRKKwFV+dYRny8/QJz2xpzrANk8P7iepmB34wp/sOlTBHsoHRW IMR6S+g0NOcki6s8GS+WrCRk9XwWYCgUtoI0gp5EuqKml5NjcD540jKyqxWr6VrqqXEw eo7M70pEwovy/hDtxKavhmmE0ys8kngaoeCJ/oNEju5VwHx64nNot541LVZGrAOh/7LR BXfo5fQ9ixvvRxs66qrcmfhr5oGcjO+Z7LRerWmRyGkC76B7lIU+/H2BBdG7Rrb5jSP3 Ob+w== X-Gm-Message-State: APjAAAXpdINGlBmS806KyTt4EOMaWAbq17YFtwLSkgfteSRZWIHqmhSz EZpyIL2yUpYV/f4iRoJtLcLVNUQ1s+nP56+k5ZE= X-Google-Smtp-Source: APXvYqwBRACiigOU+5NpbBzF8a1lteRWzSGXjZzfOT5T6M0h1TuJsdA9oF35dd1Rrg5BZ5IfLnVL5vv/yd7BSpsEm7Q= X-Received: by 2002:a7b:c74a:: with SMTP id w10mr397162wmk.99.1565045961724; Mon, 05 Aug 2019 15:59:21 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Dinesh Dutt Date: Mon, 5 Aug 2019 15:59:09 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Greg Mirsky Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="0000000000009b17f1058f66a8b6" Archived-At: X-Mailman-Approved-At: Tue, 06 Aug 2019 05:08:06 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Aug 2019 22:59:44 -0000 --0000000000009b17f1058f66a8b6 Content-Type: text/plain; charset="UTF-8" Hi Greg, That we agree on the problem definition is the first step forward. Your original document had my cases covered and so I was surprised by the track this thread took. It doesn't matter, we're back on track. My recommendation is to not worry about specifying the precise MAC/IP address used in the inner header. The addresses chosen MUST ensure that the packet is trapped to the control plane of the VTEP and not escape to the tenant if the BFD is to the VTEP. Any solution MUST also not preclude the use of the BFD by tenant systems for that VNI. There are many ways an implementer can choose to implement this. For example, the inner MAC address is whatever the VTEP implementer would return if ARP'd for the IP address used in the inner header in the given VNI. The implementer can pick a fixed MAC address, one that they own etc. Multiple BFD sessions can be run for testing path connectivity on more than one VNIs. Limits should be in place to avoid overwhelming the receiver with BFD messages (you had words about this in your currently published draft). If the VNI is irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being tested. the user can use any VNI active on the VTEP on which the VTEP owns an IP address. I'm concerned about the use of 127/8 address only because of firewalls or implementations that drop packets with these addresses as either the source or destination. For example, on many merchant silicon, I don't believe you can turn off martian checking and drops *only* for VXLAN-encapsulated BFD packets. I don't know what the Linux kernel does today on such packets, for example (or Hyper-V). I'd like a solution that doesn't demand additional or new chip functionality or require additional middle-box hole punch. Why do you feel you MUST to specify the MAC/IP address on the inner packet? What am I missing here? Dinesh On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky wrote: > Hi Dinesh, > what do you see as the way forward? I agree, that the proposed text > doesn't work for multi-VNI concurrent monitoring because these VNIs are > tenant's VNIs. And in that case, we need to specify another mechanism to > trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address > must be used as the destination MAC address in the inner Ethernet frame. > The destination IP address may be either VTEP's address of martian (I do > prefer martian). Let me give it try: > NEW TEXT: > > To monitor continuity of the path between two VTEPs, an operator MUST > select a VNI number to be used as Management VNI. Management VNI number > MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets > received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the > default for Management VNI. [Ed.note: What we set the Destination MAC to? > Can it be invalid MAC that MUST be ignored on receipt?] > > If an implementation supports concurrent monitoring of multiple VNIs, then > the value of VNI number MAY be one of tenant's VNIs. The destination MAC > address in the inner Ethernet frame encapsulating BFD Control packet MUST > be MAC associated with the remote VTEP. > The destination IP address of the inner IP packet MUST be selected from > the range 127/8 for IPv4, and for IPv6 from the range > 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set > to 1. > > Regards, > Greg > > On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: > >> Hi Greg, >> >> Thanks for your clarifications. I agree with your sentiment on why you're >> running BFD over VXLAN between VTEPs. I wasn't arguing against it at all. >> All I was saying was pointing to the limitations of the use of management >> VNI. I spoke to some operators who're running EVPN and mentioned the >> discussion on this thread. They concur that they're using specific VNIs to >> test connectivity over that VNI between VTEPs to ensure misconfiguration >> doesn't lead to blackholes. My statements are based in real world operator >> experience. And I was providing language that ensured packets didn't leak >> across to tenants when they were destined to VTEPs. >> >> Dinesh >> >> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >> wrote: >> >>> Hi Dinesh, >>> many thanks for your detailed updates on how some implementations >>> process VXLAN header and the inner Ethernet frame. These are very helpful >>> in achieving the workable solution for the problem at hand. >>> You've noted that a path between VTEPs may be monitored in the underlay >>> network by merely establishing a BFD session. That is true, but by using >>> BFD with VXLAN encapsulation between the pair of VTEPs we are extending the >>> OAM domain by including, to some extent, VXLAN forwarding engine. Abstract >>> in RFC 5880 defines the goal and the domain in which BFD protocol can >>> detect a fault as: >>> This document describes a protocol intended to detect faults in the >>> bidirectional path between two forwarding engines, including >>> interfaces, data link(s), and to the extent possible the forwarding >>> engines themselves, with potentially very low latency. >>> Thus, BFD in the underlay will exercise a part of IP forwarding engine >>> while BFD with VXLAN encapsulation, ran between the same pair of VTEPs, >>> extends the OAM domain. At the same time, defining BFD between tenant >>> systems in outside the goal of this specification. But VXLAN BFD session >>> between VTEPs may be useful in monitoring e2e path between tenants, as >>> described in the update to -07: >>> At the same time, a service layer BFD session may be used between the >>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault management. >>> In such case, for VTEPs BFD control packets of that session are >>> indistinguishable from data packets. If end-to-end defect detection >>> is realized as the set of concatenated OAM domains, e.g., VM1-1 - IP1 >>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD >>> follow the procedures described in Section 6.8.17 [RFC5880]. >>> I've attached the current working version of the draft. >>> >>> Regards, >>> Greg >>> >>> >>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: >>> >>>> What I mean is "How do you infer that it excludes the case I'm talking >>>> about?". >>>> >>>> Dinesh >>>> >>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: >>>> >>>>> The abstract reads this: " >>>>> >>>>> This document describes the use of the Bidirectional Forwarding >>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>> >>>>> How do you infer what you said? >>>>> >>>>> Dinesh >>>>> >>>>> >>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern >>>>> wrote: >>>>> >>>>>> I am going by what the draft says its purpose is. If you (Dinesh) >>>>>> want >>>>>> the draft to fulfill a different purpose, then either ask the chairs >>>>>> to >>>>>> take this draft back to the WG, or write a separate draft. >>>>>> As currently written, the behavior Greg proposed meets the needs, and >>>>>> does so in a way that is consistent with VxLAN. >>>>>> >>>>>> Yours, >>>>>> Joel >>>>>> >>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>> reachability is >>>>>> > determined by the underlay, I don't need VXLAN-encaped packet for >>>>>> that. >>>>>> > Do we agree? >>>>>> > >>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>> picking any >>>>>> > single VNI maybe fine. But is this all any network operator wants? >>>>>> Why? >>>>>> > In what situations has this been a problem? I suspect operators >>>>>> also >>>>>> > want to verify path continuity over a specific VNI. If you say this >>>>>> is >>>>>> > not defined by the document, I disagree because the current version >>>>>> > talks about controlling the number of BFD sessions between the >>>>>> VTEPs >>>>>> > (see section 3). More importantly, this is a real problem that >>>>>> operators >>>>>> > like to verify. >>>>>> > >>>>>> > Dinesh >>>>>> > >>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern >>>>> > > wrote: >>>>>> > >>>>>> > What is special about the management VNI is precisely that it >>>>>> is NOT a >>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>> allocates VNI to >>>>>> > tenants, and which VNI it has allocated. In contrast, it does >>>>>> not know >>>>>> > which IP addresses or MAC adddresses teh tenant is using or may >>>>>> plan >>>>>> > to use. >>>>>> > >>>>>> > Yours, >>>>>> > Joel >>>>>> > >>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>> > > The assumption of an IP address within any VNI is suspect >>>>>> that way. >>>>>> > > What's special about a single VNI, the management VNI? The >>>>>> VTEP IP >>>>>> > > address does not belong in reality in any VNI. >>>>>> > > >>>>>> > > Dinesh >>>>>> > > >>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>> > >>>>>> > > >> >>>>>> wrote: >>>>>> > > >>>>>> > > Your response seems to miss two points: >>>>>> > > >>>>>> > > First, the problem you describe is not what the document >>>>>> says >>>>>> > it is >>>>>> > > solving. To the degree it discusses it at all, the >>>>>> document >>>>>> > says " >>>>>> > > In >>>>>> > > most cases, a single BFD session is sufficient for the >>>>>> given >>>>>> > VTEP to >>>>>> > > monitor the reachability of a remote VTEP, regardless of >>>>>> the >>>>>> > number of >>>>>> > > VNIs in common. " >>>>>> > > >>>>>> > > Second, you assume the existence of an IP address for a >>>>>> VTEP >>>>>> > within a >>>>>> > > VNI. As with the MAC address, the VTEP does not have an >>>>>> IP >>>>>> > address >>>>>> > > within the VNI. Some implementations may have created >>>>>> such a >>>>>> > thing, >>>>>> > > but >>>>>> > > the general construct, as defined to date, does not >>>>>> support such. >>>>>> > > >>>>>> > > In short, you are requiring a behavior that violates the >>>>>> > architectural >>>>>> > > structure of overlay / underlay separation, and common >>>>>> > usage. And you >>>>>> > > are doing so to support a use case that the working >>>>>> group has not >>>>>> > > indicated in the document as important. >>>>>> > > >>>>>> > > Yours, >>>>>> > > Joel >>>>>> > > >>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>> > > > Joel, >>>>>> > > > >>>>>> > > > You understood correctly. >>>>>> > > > >>>>>> > > > The VNIs may not share fate due to misconfiguration. >>>>>> And I >>>>>> > strongly >>>>>> > > > suspect someone will want to use BFD for that because >>>>>> its >>>>>> > about >>>>>> > > checking >>>>>> > > > path continuity as stated by the draft. As long as >>>>>> there's a >>>>>> > > valid IP >>>>>> > > > (because it's BFD) owned by the VTEP in that VNI, you >>>>>> can >>>>>> > use BFD in >>>>>> > > > that VNI. Thats all that you need to dictate. That >>>>>> IP address >>>>>> > > has a MAC >>>>>> > > > address and you can use that on the inner frame. That >>>>>> is >>>>>> > all normal >>>>>> > > > VXLAN processing. The outer IP is always that of the >>>>>> VTEP. >>>>>> > > > >>>>>> > > > Dinesh >>>>>> > > > >>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>> > > >>>>>> > > >>>>>> > > > >>>>> jmh@joelhalpern.com> >>>>>> > >>> >>>>>> wrote: >>>>>> > > > >>>>>> > > > If I am reading your various emails correctly >>>>>> Dinesh >>>>>> > (and I >>>>>> > > may have >>>>>> > > > missed something) you are trying to use the MAC >>>>>> address >>>>>> > > because you >>>>>> > > > want >>>>>> > > > to be able to send these BFD packets over >>>>>> arbitrary VNI to >>>>>> > > monitor the >>>>>> > > > VNI. That is not a requirement identified in the >>>>>> > document. >>>>>> > > It is not >>>>>> > > > even a problem I understand, since all the VNI >>>>>> between an >>>>>> > > ingress and >>>>>> > > > egress VTEP share fate. >>>>>> > > > >>>>>> > > > Yours, >>>>>> > > > Joel >>>>>> > > > >>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>> > > > > Thanks for verifying this. On Linux and >>>>>> hardware >>>>>> > routers >>>>>> > > that I'm >>>>>> > > > aware >>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>> physical MAC >>>>>> > address is >>>>>> > > > reused >>>>>> > > > > across the VNIs on the VTEP. Did you check on >>>>>> a non-VMW >>>>>> > > device? >>>>>> > > > This is >>>>>> > > > > more for my own curiosity. >>>>>> > > > > >>>>>> > > > > To address the general case, can we not define >>>>>> a >>>>>> > > well-known (or >>>>>> > > > reserve >>>>>> > > > > one) unicast MAC address for use with VTEP? If >>>>>> the MAC >>>>>> > > address is >>>>>> > > > > configurable in BFD command, this can be moot. >>>>>> > > > > >>>>>> > > > > Dinesh >>>>>> > > > > >>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>>>>> > > > > >>>>> > >>>>>> > > >>>>> > > >>>>>> > > > >>>>> > >>>>>> > > >>>>> > >> >>>>>> > > > >>>>> > >>>>>> > > >>>>> > > >>>>>> > > > >>>>> > >>>>>> > > >>>>> > >>>> wrote: >>>>>> > > > > >>>>>> > > > > I have cross checked point raised about >>>>>> MAC address >>>>>> > > usage. It is >>>>>> > > > > possible that tenant could be using >>>>>> physical MAC >>>>>> > > address and >>>>>> > > > when a >>>>>> > > > > packet comes with valid VNI with a MAC >>>>>> address >>>>>> > that is >>>>>> > > being >>>>>> > > > used by >>>>>> > > > > tenant then packet will be sent to that >>>>>> tenant. >>>>>> > This rules >>>>>> > > > out the >>>>>> > > > > fact that we could use physical MAC >>>>>> address as >>>>>> > inner >>>>>> > > MAC to >>>>>> > > > ensure >>>>>> > > > > packets get terminated at VTEP itself. >>>>>> > > > > >>>>>> > > > > Thanks >>>>>> > > > > Santosh P K >>>>>> > > > > >>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh P >>>>>> K >>>>>> > > > > >>>>> > >>>>>> > > >>>>> > > >>>>>> > > > >>>>> > >>>>>> > > >>>>> > >> >>>>>> > > > >>>>> > >>>>>> > > >>>>> > > >>>>>> > > > >>>>> > >>>>>> > > >>>>> > >>>> >>>>>> > > > > wrote: >>>>>> > > > > >>>>>> > > > > Joel, >>>>>> > > > > Thanks for your inputs. I checked >>>>>> > > implementation within >>>>>> > > > > Vmware. Perhaps I should have been >>>>>> more clear >>>>>> > > about MAC >>>>>> > > > address >>>>>> > > > > space while checking internally. I >>>>>> will cross >>>>>> > > check again for >>>>>> > > > > the same and get back on this list. >>>>>> > > > > >>>>>> > > > > Thanks >>>>>> > > > > Santosh P K >>>>>> > > > > >>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel >>>>>> M. >>>>>> > Halpern >>>>>> > > > > >>>>> > >>>>> > > >>>>>> > > >>>>>> > >> >>>>>> > > > >>>>> > >>>>> > > >>>>>> > > >>>>>> > >>>> >>>>>> wrote: >>>>>> > > > > >>>>>> > > > > Sorry to ask a stupid question. >>>>>> Whose >>>>>> > > implementation? >>>>>> > > > > >>>>>> > > > > The reason I ask is that as far as >>>>>> I >>>>>> > can tell, >>>>>> > > since the >>>>>> > > > > tenant does not >>>>>> > > > > have any control access to the >>>>>> VTEP, >>>>>> > there is no >>>>>> > > > reason for >>>>>> > > > > the VTEP to >>>>>> > > > > have a MAC address in the tenant >>>>>> > space. Yes, the >>>>>> > > > device has >>>>>> > > > > a physical >>>>>> > > > > MAC address. But the tenant could >>>>>> well be >>>>>> > > using that MAC >>>>>> > > > > address. Yes, >>>>>> > > > > they would be violating the >>>>>> Ethernet spec. >>>>>> > > But the whole >>>>>> > > > > point of >>>>>> > > > > segregation is not to care about >>>>>> such >>>>>> > issues. >>>>>> > > > > >>>>>> > > > > On the other hand, if you tell me >>>>>> that >>>>>> > the VMWare >>>>>> > > > > implementation has an >>>>>> > > > > Ethernet address that is part of >>>>>> the tenant >>>>>> > > space, well, >>>>>> > > > > they made up >>>>>> > > > > this particular game. >>>>>> > > > > >>>>>> > > > > Yours, >>>>>> > > > > Joel >>>>>> > > > > >>>>>> > > > > On 7/31/2019 1:44 PM, Santosh P K >>>>>> wrote: >>>>>> > > > > > I have checked with >>>>>> implementation >>>>>> > in data >>>>>> > > path. >>>>>> > > > When we >>>>>> > > > > receive a >>>>>> > > > > > packet with valid VNI then >>>>>> lookup >>>>>> > for MAC will >>>>>> > > > happen and >>>>>> > > > > it is VTEP own >>>>>> > > > > > MAC then it will be trapped to >>>>>> control >>>>>> > > plane for >>>>>> > > > > processing. I think we >>>>>> > > > > > can have following options >>>>>> > > > > > 1. Optional managment VNI >>>>>> > > > > > 2. Mandatory inner MAC set to >>>>>> VTEP mac >>>>>> > > > > > 3. Inner IP TTL set to 1 to >>>>>> avoid >>>>>> > > forwarding of packet >>>>>> > > > > via inner IP >>>>>> > > > > > address. >>>>>> > > > > > >>>>>> > > > > > >>>>>> > > > > > Thoughts? >>>>>> > > > > > >>>>>> > > > > > Thansk >>>>>> > > > > > Santosh P K >>>>>> > > > > > >>>>>> > > > > > On Wed, Jul 31, 2019 at 9:20 AM >>>>>> Greg >>>>>> > Mirsky >>>>>> > > > > >>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>> >>>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>>> >>>>>> > > > >>>>> > >>>>> > > >>>>>> > > >>>>> gregimirsky@gmail.com> >>>>>> > >>> >>>>>> > > > > > >>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>> >>>>>> > > > >>>>> > >>>>> > >> >>>>>> > > > > >>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>> >>>>>> > > > >>>>> > >>>>>> > > >>>>> > >>>>> wrote: >>>>>> > > > > > >>>>>> > > > > > Hi Dinesh, >>>>>> > > > > > thank you for your >>>>>> consideration >>>>>> > of the >>>>>> > > > proposal and >>>>>> > > > > questions. What >>>>>> > > > > > would you see as the scope >>>>>> of >>>>>> > testing the >>>>>> > > > > connectivity for the >>>>>> > > > > > specific VNI? If it is >>>>>> > > tenant-to-tenant, then >>>>>> > > > VTEPs >>>>>> > > > > will treat these >>>>>> > > > > > packets as regular user >>>>>> frames. More >>>>>> > > likely, these >>>>>> > > > > could be Layer 2 >>>>>> > > > > > OAM, e.g. CCM frames. The >>>>>> reason >>>>>> > to use >>>>>> > > 127/8 for >>>>>> > > > > IPv4, and >>>>>> > > > > > 0:0:0:0:0:FFFF:7F00:0/104 >>>>>> for >>>>>> > IPv6 is >>>>>> > > to safeguard >>>>>> > > > > from leaking >>>>>> > > > > > Ethernet frames with BFD >>>>>> Control >>>>>> > packet >>>>>> > > to a >>>>>> > > > tenant. >>>>>> > > > > > You've suggested using a MAC >>>>>> > address to >>>>>> > > trap the >>>>>> > > > > control packet at >>>>>> > > > > > VTEP. What that address >>>>>> could be? We >>>>>> > > had proposed >>>>>> > > > > using the >>>>>> > > > > > dedicated MAC and VTEP's >>>>>> MAC and >>>>>> > both >>>>>> > > raised >>>>>> > > > concerns >>>>>> > > > > among VXLAN >>>>>> > > > > > experts. The idea of using >>>>>> > Management >>>>>> > > VNI may >>>>>> > > > be more >>>>>> > > > > acceptable >>>>>> > > > > > based on its similarity to >>>>>> the >>>>>> > practice >>>>>> > > of using >>>>>> > > > > Management VLAN. >>>>>> > > > > > >>>>>> > > > > > Regards, >>>>>> > > > > > Greg >>>>>> > > > > > >>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>> 12:03 PM >>>>>> > Dinesh >>>>>> > > Dutt >>>>>> > > > > >>>>> > >>>>> > > >>>>>> > > >>>>>> > >> >>>>>> > > > >>>>> > >>>>>> > > >>>>>> > > >>>>>> > >>> >>>>>> > > > > > >>>>> > >>>>>> > > > >>>>>> > > > >>>>> > >>>>>> > >> >>>>>> > > >>>>>> > > >>>>>> > > > >>>>> > >>>>>> > >>>>> >>>>>> > > > > wrote: >>>>>> > > > > > >>>>>> > > > > > Hi Greg, >>>>>> > > > > > >>>>>> > > > > > As long as the inner MAC >>>>>> > address is >>>>>> > > such >>>>>> > > > that the >>>>>> > > > > packet is >>>>>> > > > > > trapped to the CPU, it >>>>>> should be >>>>>> > > fine for >>>>>> > > > use as >>>>>> > > > > an inner MAC is >>>>>> > > > > > it not? Stating that is >>>>>> > better than >>>>>> > > trying to >>>>>> > > > > force a management >>>>>> > > > > > VNI. What if someone >>>>>> wants >>>>>> > to test >>>>>> > > > connectivity >>>>>> > > > > on a specific >>>>>> > > > > > VNI? I would not pick a >>>>>> > loopback IP >>>>>> > > > address for >>>>>> > > > > this since that >>>>>> > > > > > address range is >>>>>> host/node local >>>>>> > > only. Is >>>>>> > > > there a >>>>>> > > > > reason you're >>>>>> > > > > > not using the VTEP IP >>>>>> as the >>>>>> > inner IP >>>>>> > > > address ? >>>>>> > > > > > >>>>>> > > > > > Dinesh >>>>>> > > > > > >>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>> 5:48 AM >>>>>> > > Greg Mirsky >>>>>> > > > > > >>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>> >>>>>> > > > >>>>> > >>>>> > >> >>>>>> > > > > >>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>> >>>>>> > > > >>>>> > >>>>>> > > >>>>> > >>> >>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>> >>>>>> > > > >>>>> > >>>>> > >> >>>>>> > > > > >>>>> > >>>>>> > > >>>>> gregimirsky@gmail.com>> >>>>>> > > > >>>>> > >>>>>> > > >>>>> > >>>>> wrote: >>>>>> > > > > > >>>>>> > > > > > Dear All, >>>>>> > > > > > thank you for your >>>>>> comments, >>>>>> > > > suggestions on >>>>>> > > > > this issue, >>>>>> > > > > > probably the most >>>>>> > challenging >>>>>> > > for this >>>>>> > > > > specification. In the >>>>>> > > > > > course of our >>>>>> discussions, >>>>>> > > we've agreed to >>>>>> > > > > abandon the >>>>>> > > > > > request to allocate >>>>>> the >>>>>> > > dedicated MAC >>>>>> > > > address >>>>>> > > > > to be used as >>>>>> > > > > > the destination MAC >>>>>> > address in >>>>>> > > the inner >>>>>> > > > > Ethernet frame. >>>>>> > > > > > Also, earlier using >>>>>> VNI >>>>>> > 0 was >>>>>> > > changed from >>>>>> > > > > mandatory to one >>>>>> > > > > > of the options an >>>>>> > > implementation may >>>>>> > > > offer to >>>>>> > > > > an operator. >>>>>> > > > > > The most recent >>>>>> > discussion was >>>>>> > > whether >>>>>> > > > VTEP's >>>>>> > > > > MAC address >>>>>> > > > > > might be used as the >>>>>> > > destination MAC >>>>>> > > > address >>>>>> > > > > in the inner >>>>>> > > > > > Ethernet frame. As I >>>>>> > recall it, the >>>>>> > > > comments >>>>>> > > > > from VXLAN >>>>>> > > > > > experts equally >>>>>> split >>>>>> > with one >>>>>> > > for it >>>>>> > > > and one >>>>>> > > > > against. Hence >>>>>> > > > > > I would like to >>>>>> propose >>>>>> > a new >>>>>> > > text to >>>>>> > > > resolve >>>>>> > > > > the issue. The >>>>>> > > > > > idea is to let an >>>>>> > operator select >>>>>> > > > Management >>>>>> > > > > VNI and use >>>>>> > > > > > that VNI in VXLAN >>>>>> > encapsulation >>>>>> > > of BFD >>>>>> > > > > Control packets: >>>>>> > > > > > NEW TEXT: >>>>>> > > > > > >>>>>> > > > > > An operator MUST >>>>>> > select a VNI >>>>>> > > > number to >>>>>> > > > > be used as >>>>>> > > > > > Management VNI. >>>>>> VXLAN >>>>>> > > packet for >>>>>> > > > > Management VNI MUST NOT >>>>>> > > > > > be sent to a >>>>>> tenant. VNI >>>>>> > > number 1 is >>>>>> > > > > RECOMMENDED as the >>>>>> > > > > > default for >>>>>> > Management VNI. >>>>>> > > > > > >>>>>> > > > > > With that new text, >>>>>> what >>>>>> > can be the >>>>>> > > > value of >>>>>> > > > > the destination >>>>>> > > > > > MAC in the inner >>>>>> Ethernet? I >>>>>> > > tend to >>>>>> > > > believe >>>>>> > > > > that it can be >>>>>> > > > > > anything and >>>>>> ignored by the >>>>>> > > reciever VTEP. >>>>>> > > > > Also, if the >>>>>> > > > > > trapping is based >>>>>> on VNI >>>>>> > > number, the >>>>>> > > > > destination IP address >>>>>> > > > > > of the inner IP >>>>>> packet >>>>>> > can from >>>>>> > > the range >>>>>> > > > > 127/8 for IPv4, >>>>>> > > > > > and for IPv6 from >>>>>> the range >>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>>>> > > > > > lastly, the TTL to >>>>>> be >>>>>> > set to 1 (no >>>>>> > > > change here). >>>>>> > > > > > >>>>>> > > > > > Much appreciate your >>>>>> > comments, >>>>>> > > > questions, and >>>>>> > > > > suggestions. >>>>>> > > > > > >>>>>> > > > > > Best regards, >>>>>> > > > > > Greg >>>>>> > > > > > >>>>>> > > > > >>>>>> > > > >>>>>> > > >>>>>> > >>>>>> >>>>> --0000000000009b17f1058f66a8b6 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj5IaSBHcmVnLDwvZGl2PjxkaXY+PGJyPjwvZGl2PjxkaXY+VGhh dCB3ZSBhZ3JlZSBvbiB0aGUgcHJvYmxlbSBkZWZpbml0aW9uIGlzIHRoZSBmaXJzdCBzdGVwIGZv cndhcmQuIFlvdXIgb3JpZ2luYWwgZG9jdW1lbnQgaGFkIG15IGNhc2VzIGNvdmVyZWQgYW5kIHNv IEkgd2FzIHN1cnByaXNlZCBieSB0aGUgdHJhY2sgdGhpcyB0aHJlYWQgdG9vay4gSXQgZG9lc24m IzM5O3QgbWF0dGVyLCB3ZSYjMzk7cmUgYmFjayBvbiB0cmFjay48L2Rpdj48ZGl2Pjxicj48L2Rp dj48ZGl2Pk15IHJlY29tbWVuZGF0aW9uIGlzIHRvIG5vdCB3b3JyeSBhYm91dCBzcGVjaWZ5aW5n 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(128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 83157120058; Mon, 5 Aug 2019 17:56:19 -0700 (PDT) Received: by mail-lj1-x230.google.com with SMTP id d24so80770847ljg.8; Mon, 05 Aug 2019 17:56:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=vJIvUY4sSr708J3Xoz855vUfSDGeVzuwHqmFGpADZKE=; b=fgEt2eLLMmta0mMD3OQCFBiGYAlB3AAAuL/KmVO3JQmY39rOQXp4Yp/X02q4FDVxYf BRR88YVi8NJBbjuLRxobaCL+dEtXE/owM8kBVgZmveGNSUiZLP2Sm31sZ17+3pS8sDua 2znW7TFdiKTnB+CjVXlWmKE0KmQjCrrBYzc1Z9uhZVJxcSgJmWQ+Y12J/9SddUSHRFvT G06QWFeSHmbZxVwXUsgi4+TtB9htPyTmlzMt5qqlMwv+QAWdWaqC2fFDG9BWWSy8TzqX v7v/6ILrREpjwTlcB9JpLQjJVdNOZxHPFFL/6FoJBQ3HEdRmcokaq15O0R0Cy4ZdN9Ku voqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=vJIvUY4sSr708J3Xoz855vUfSDGeVzuwHqmFGpADZKE=; b=Lnjc6BU9dyhPtmtTy9wSb5x+W5ptbVDVyH2qNQbzB1MmAFqtKeVxhFnSy6P7yz97vH feEcHEQ1KWgVpwjDhC/sG102WtFkl3V+xdWGdrL3up5W/GjmPnzTVl3ke/8r0uKuB3yL mJJt1mTI+NsuqGyN/DT/IXLwF7pxQPcv+fjUEx6LItco4JwZqf6iM6ESi1+loGtHe6aU zPtxHtBKUlX18hUbOpkzACuGcgfdEAEquLZUQwukf7kYx7qUamBqMu7YsK0Rx4d1+NIN lFp9UHgkGqj5ZP3NKRuQROEyf8Cj12cpZ1X0i+e5gbbn7+21WAE/3t2GK2X+ekMe5QDl 8NrQ== X-Gm-Message-State: APjAAAW6WAAnueiQx6i4XlMZ70/epaqzOFzmdxboHDRSx6htFg8E2NnG ordXE5/ycnmpY7KnucLDRohC/FXdw7UmQYh2qZo= X-Google-Smtp-Source: APXvYqyQa8tHR6QhdAirAxebi2QyFN95ZLtHzeS/HVuf2eFpLbi1p9Bppzh2PMSize9lLDFuFA9gr2hLx7tULWK5nBE= X-Received: by 2002:a2e:9ac6:: with SMTP id p6mr279660ljj.100.1565052977512; Mon, 05 Aug 2019 17:56:17 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Greg Mirsky Date: Mon, 5 Aug 2019 17:56:06 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000c787f6058f684a21" Archived-At: X-Mailman-Approved-At: Tue, 06 Aug 2019 05:08:06 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Aug 2019 00:56:28 -0000 --000000000000c787f6058f684a21 Content-Type: text/plain; charset="UTF-8" Hi Dinesh, thank you for your expedient detailed response. I believe that the ability to run BFD session up to a tenant (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this specification. I'm trying to provide precise specification on what can be used ad the destination MAC and IP addresses in the inner frame/packet as I believe that likely will help to avoid interoperability issues. I'm interested to learn some more about the "martian checking" function. As you know, martian addresses have been used as destination IP address in LSP Ping and BFD over MPLS LSP and PW. I haven't heard that any silicon feature caused problems for operators using these tools. Regards, Greg On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt wrote: > Hi Greg, > > That we agree on the problem definition is the first step forward. Your > original document had my cases covered and so I was surprised by the track > this thread took. It doesn't matter, we're back on track. > > My recommendation is to not worry about specifying the precise MAC/IP > address used in the inner header. The addresses chosen MUST ensure that the > packet is trapped to the control plane of the VTEP and not escape to the > tenant if the BFD is to the VTEP. Any solution MUST also not preclude the > use of the BFD by tenant systems for that VNI. There are many ways an > implementer can choose to implement this. For example, the inner MAC > address is whatever the VTEP implementer would return if ARP'd for the IP > address used in the inner header in the given VNI. The implementer can pick > a fixed MAC address, one that they own etc. Multiple BFD sessions can be > run for testing path connectivity on more than one VNIs. Limits should be > in place to avoid overwhelming the receiver with BFD messages (you had > words about this in your currently published draft). If the VNI is > irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being > tested. the user can use any VNI active on the VTEP on which the VTEP owns > an IP address. > > I'm concerned about the use of 127/8 address only because of firewalls or > implementations that drop packets with these addresses as either the source > or destination. For example, on many merchant silicon, I don't believe you > can turn off martian checking and drops *only* for VXLAN-encapsulated BFD > packets. I don't know what the Linux kernel does today on such packets, for > example (or Hyper-V). I'd like a solution that doesn't demand additional or > new chip functionality or require additional middle-box hole punch. > > Why do you feel you MUST to specify the MAC/IP address on the inner > packet? What am I missing here? > > Dinesh > > On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky wrote: > >> Hi Dinesh, >> what do you see as the way forward? I agree, that the proposed text >> doesn't work for multi-VNI concurrent monitoring because these VNIs are >> tenant's VNIs. And in that case, we need to specify another mechanism to >> trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address >> must be used as the destination MAC address in the inner Ethernet frame. >> The destination IP address may be either VTEP's address of martian (I do >> prefer martian). Let me give it try: >> NEW TEXT: >> >> To monitor continuity of the path between two VTEPs, an operator MUST >> select a VNI number to be used as Management VNI. Management VNI number >> MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets >> received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the >> default for Management VNI. [Ed.note: What we set the Destination MAC to? >> Can it be invalid MAC that MUST be ignored on receipt?] >> >> If an implementation supports concurrent monitoring of multiple VNIs, >> then the value of VNI number MAY be one of tenant's VNIs. The destination >> MAC address in the inner Ethernet frame encapsulating BFD Control packet >> MUST be MAC associated with the remote VTEP. >> The destination IP address of the inner IP packet MUST be selected from >> the range 127/8 for IPv4, and for IPv6 from the range >> 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set >> to 1. >> >> Regards, >> Greg >> >> On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: >> >>> Hi Greg, >>> >>> Thanks for your clarifications. I agree with your sentiment on why >>> you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at >>> all. All I was saying was pointing to the limitations of the use of >>> management VNI. I spoke to some operators who're running EVPN and mentioned >>> the discussion on this thread. They concur that they're using specific VNIs >>> to test connectivity over that VNI between VTEPs to ensure misconfiguration >>> doesn't lead to blackholes. My statements are based in real world operator >>> experience. And I was providing language that ensured packets didn't leak >>> across to tenants when they were destined to VTEPs. >>> >>> Dinesh >>> >>> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >>> wrote: >>> >>>> Hi Dinesh, >>>> many thanks for your detailed updates on how some implementations >>>> process VXLAN header and the inner Ethernet frame. These are very helpful >>>> in achieving the workable solution for the problem at hand. >>>> You've noted that a path between VTEPs may be monitored in the underlay >>>> network by merely establishing a BFD session. That is true, but by using >>>> BFD with VXLAN encapsulation between the pair of VTEPs we are extending the >>>> OAM domain by including, to some extent, VXLAN forwarding engine. Abstract >>>> in RFC 5880 defines the goal and the domain in which BFD protocol can >>>> detect a fault as: >>>> This document describes a protocol intended to detect faults in the >>>> bidirectional path between two forwarding engines, including >>>> interfaces, data link(s), and to the extent possible the forwarding >>>> engines themselves, with potentially very low latency. >>>> Thus, BFD in the underlay will exercise a part of IP forwarding engine >>>> while BFD with VXLAN encapsulation, ran between the same pair of VTEPs, >>>> extends the OAM domain. At the same time, defining BFD between tenant >>>> systems in outside the goal of this specification. But VXLAN BFD session >>>> between VTEPs may be useful in monitoring e2e path between tenants, as >>>> described in the update to -07: >>>> At the same time, a service layer BFD session may be used between the >>>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault management. >>>> In such case, for VTEPs BFD control packets of that session are >>>> indistinguishable from data packets. If end-to-end defect detection >>>> is realized as the set of concatenated OAM domains, e.g., VM1-1 - IP1 >>>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD >>>> follow the procedures described in Section 6.8.17 [RFC5880]. >>>> I've attached the current working version of the draft. >>>> >>>> Regards, >>>> Greg >>>> >>>> >>>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: >>>> >>>>> What I mean is "How do you infer that it excludes the case I'm talking >>>>> about?". >>>>> >>>>> Dinesh >>>>> >>>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: >>>>> >>>>>> The abstract reads this: " >>>>>> >>>>>> This document describes the use of the Bidirectional Forwarding >>>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>>> >>>>>> How do you infer what you said? >>>>>> >>>>>> Dinesh >>>>>> >>>>>> >>>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern >>>>>> wrote: >>>>>> >>>>>>> I am going by what the draft says its purpose is. If you (Dinesh) >>>>>>> want >>>>>>> the draft to fulfill a different purpose, then either ask the chairs >>>>>>> to >>>>>>> take this draft back to the WG, or write a separate draft. >>>>>>> As currently written, the behavior Greg proposed meets the needs, >>>>>>> and >>>>>>> does so in a way that is consistent with VxLAN. >>>>>>> >>>>>>> Yours, >>>>>>> Joel >>>>>>> >>>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>>> reachability is >>>>>>> > determined by the underlay, I don't need VXLAN-encaped packet for >>>>>>> that. >>>>>>> > Do we agree? >>>>>>> > >>>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>>> picking any >>>>>>> > single VNI maybe fine. But is this all any network operator wants? >>>>>>> Why? >>>>>>> > In what situations has this been a problem? I suspect operators >>>>>>> also >>>>>>> > want to verify path continuity over a specific VNI. If you say >>>>>>> this is >>>>>>> > not defined by the document, I disagree because the current >>>>>>> version >>>>>>> > talks about controlling the number of BFD sessions between the >>>>>>> VTEPs >>>>>>> > (see section 3). More importantly, this is a real problem that >>>>>>> operators >>>>>>> > like to verify. >>>>>>> > >>>>>>> > Dinesh >>>>>>> > >>>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern < >>>>>>> jmh@joelhalpern.com >>>>>>> > > wrote: >>>>>>> > >>>>>>> > What is special about the management VNI is precisely that it >>>>>>> is NOT a >>>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>>> allocates VNI to >>>>>>> > tenants, and which VNI it has allocated. In contrast, it does >>>>>>> not know >>>>>>> > which IP addresses or MAC adddresses teh tenant is using or >>>>>>> may plan >>>>>>> > to use. >>>>>>> > >>>>>>> > Yours, >>>>>>> > Joel >>>>>>> > >>>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>>> > > The assumption of an IP address within any VNI is suspect >>>>>>> that way. >>>>>>> > > What's special about a single VNI, the management VNI? The >>>>>>> VTEP IP >>>>>>> > > address does not belong in reality in any VNI. >>>>>>> > > >>>>>>> > > Dinesh >>>>>>> > > >>>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>>> > >>>>>>> > > >> >>>>>>> wrote: >>>>>>> > > >>>>>>> > > Your response seems to miss two points: >>>>>>> > > >>>>>>> > > First, the problem you describe is not what the >>>>>>> document says >>>>>>> > it is >>>>>>> > > solving. To the degree it discusses it at all, the >>>>>>> document >>>>>>> > says " >>>>>>> > > In >>>>>>> > > most cases, a single BFD session is sufficient for the >>>>>>> given >>>>>>> > VTEP to >>>>>>> > > monitor the reachability of a remote VTEP, regardless >>>>>>> of the >>>>>>> > number of >>>>>>> > > VNIs in common. " >>>>>>> > > >>>>>>> > > Second, you assume the existence of an IP address for a >>>>>>> VTEP >>>>>>> > within a >>>>>>> > > VNI. As with the MAC address, the VTEP does not have >>>>>>> an IP >>>>>>> > address >>>>>>> > > within the VNI. Some implementations may have created >>>>>>> such a >>>>>>> > thing, >>>>>>> > > but >>>>>>> > > the general construct, as defined to date, does not >>>>>>> support such. >>>>>>> > > >>>>>>> > > In short, you are requiring a behavior that violates the >>>>>>> > architectural >>>>>>> > > structure of overlay / underlay separation, and common >>>>>>> > usage. And you >>>>>>> > > are doing so to support a use case that the working >>>>>>> group has not >>>>>>> > > indicated in the document as important. >>>>>>> > > >>>>>>> > > Yours, >>>>>>> > > Joel >>>>>>> > > >>>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>>> > > > Joel, >>>>>>> > > > >>>>>>> > > > You understood correctly. >>>>>>> > > > >>>>>>> > > > The VNIs may not share fate due to misconfiguration. >>>>>>> And I >>>>>>> > strongly >>>>>>> > > > suspect someone will want to use BFD for that >>>>>>> because its >>>>>>> > about >>>>>>> > > checking >>>>>>> > > > path continuity as stated by the draft. As long as >>>>>>> there's a >>>>>>> > > valid IP >>>>>>> > > > (because it's BFD) owned by the VTEP in that VNI, >>>>>>> you can >>>>>>> > use BFD in >>>>>>> > > > that VNI. Thats all that you need to dictate. That >>>>>>> IP address >>>>>>> > > has a MAC >>>>>>> > > > address and you can use that on the inner frame. >>>>>>> That is >>>>>>> > all normal >>>>>>> > > > VXLAN processing. The outer IP is always that of the >>>>>>> VTEP. >>>>>>> > > > >>>>>>> > > > Dinesh >>>>>>> > > > >>>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>>> > > >>>>>>> > > >>>>>>> > > > >>>>>> jmh@joelhalpern.com> >>>>>>> > >>> >>>>>>> wrote: >>>>>>> > > > >>>>>>> > > > If I am reading your various emails correctly >>>>>>> Dinesh >>>>>>> > (and I >>>>>>> > > may have >>>>>>> > > > missed something) you are trying to use the MAC >>>>>>> address >>>>>>> > > because you >>>>>>> > > > want >>>>>>> > > > to be able to send these BFD packets over >>>>>>> arbitrary VNI to >>>>>>> > > monitor the >>>>>>> > > > VNI. That is not a requirement identified in the >>>>>>> > document. >>>>>>> > > It is not >>>>>>> > > > even a problem I understand, since all the VNI >>>>>>> between an >>>>>>> > > ingress and >>>>>>> > > > egress VTEP share fate. >>>>>>> > > > >>>>>>> > > > Yours, >>>>>>> > > > Joel >>>>>>> > > > >>>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>>> > > > > Thanks for verifying this. On Linux and >>>>>>> hardware >>>>>>> > routers >>>>>>> > > that I'm >>>>>>> > > > aware >>>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>>> physical MAC >>>>>>> > address is >>>>>>> > > > reused >>>>>>> > > > > across the VNIs on the VTEP. Did you check on >>>>>>> a non-VMW >>>>>>> > > device? >>>>>>> > > > This is >>>>>>> > > > > more for my own curiosity. >>>>>>> > > > > >>>>>>> > > > > To address the general case, can we not >>>>>>> define a >>>>>>> > > well-known (or >>>>>>> > > > reserve >>>>>>> > > > > one) unicast MAC address for use with VTEP? >>>>>>> If the MAC >>>>>>> > > address is >>>>>>> > > > > configurable in BFD command, this can be moot. >>>>>>> > > > > >>>>>>> > > > > Dinesh >>>>>>> > > > > >>>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>>>>>> > > > > >>>>>> > >>>>>>> > > >>>>>> > > >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > >> >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > > >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > >>>> wrote: >>>>>>> > > > > >>>>>>> > > > > I have cross checked point raised about >>>>>>> MAC address >>>>>>> > > usage. It is >>>>>>> > > > > possible that tenant could be using >>>>>>> physical MAC >>>>>>> > > address and >>>>>>> > > > when a >>>>>>> > > > > packet comes with valid VNI with a MAC >>>>>>> address >>>>>>> > that is >>>>>>> > > being >>>>>>> > > > used by >>>>>>> > > > > tenant then packet will be sent to that >>>>>>> tenant. >>>>>>> > This rules >>>>>>> > > > out the >>>>>>> > > > > fact that we could use physical MAC >>>>>>> address as >>>>>>> > inner >>>>>>> > > MAC to >>>>>>> > > > ensure >>>>>>> > > > > packets get terminated at VTEP itself. >>>>>>> > > > > >>>>>>> > > > > Thanks >>>>>>> > > > > Santosh P K >>>>>>> > > > > >>>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh >>>>>>> P K >>>>>>> > > > > >>>>>> > >>>>>>> > > >>>>>> > > >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > >> >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > > >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > >>>> >>>>>>> > > > > wrote: >>>>>>> > > > > >>>>>>> > > > > Joel, >>>>>>> > > > > Thanks for your inputs. I checked >>>>>>> > > implementation within >>>>>>> > > > > Vmware. Perhaps I should have been >>>>>>> more clear >>>>>>> > > about MAC >>>>>>> > > > address >>>>>>> > > > > space while checking internally. I >>>>>>> will cross >>>>>>> > > check again for >>>>>>> > > > > the same and get back on this list. >>>>>>> > > > > >>>>>>> > > > > Thanks >>>>>>> > > > > Santosh P K >>>>>>> > > > > >>>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM Joel >>>>>>> M. >>>>>>> > Halpern >>>>>>> > > > > >>>>>> > >>>>>> > > >>>>>>> > > >>>>>> > >>>>>>> > >> >>>>>>> > > > >>>>>> > >>>>>> > > >>>>>>> > > >>>>>> > >>>>>>> > >>>> >>>>>>> wrote: >>>>>>> > > > > >>>>>>> > > > > Sorry to ask a stupid question. >>>>>>> Whose >>>>>>> > > implementation? >>>>>>> > > > > >>>>>>> > > > > The reason I ask is that as far >>>>>>> as I >>>>>>> > can tell, >>>>>>> > > since the >>>>>>> > > > > tenant does not >>>>>>> > > > > have any control access to the >>>>>>> VTEP, >>>>>>> > there is no >>>>>>> > > > reason for >>>>>>> > > > > the VTEP to >>>>>>> > > > > have a MAC address in the tenant >>>>>>> > space. Yes, the >>>>>>> > > > device has >>>>>>> > > > > a physical >>>>>>> > > > > MAC address. But the tenant >>>>>>> could well be >>>>>>> > > using that MAC >>>>>>> > > > > address. Yes, >>>>>>> > > > > they would be violating the >>>>>>> Ethernet spec. >>>>>>> > > But the whole >>>>>>> > > > > point of >>>>>>> > > > > segregation is not to care about >>>>>>> such >>>>>>> > issues. >>>>>>> > > > > >>>>>>> > > > > On the other hand, if you tell me >>>>>>> that >>>>>>> > the VMWare >>>>>>> > > > > implementation has an >>>>>>> > > > > Ethernet address that is part of >>>>>>> the tenant >>>>>>> > > space, well, >>>>>>> > > > > they made up >>>>>>> > > > > this particular game. >>>>>>> > > > > >>>>>>> > > > > Yours, >>>>>>> > > > > Joel >>>>>>> > > > > >>>>>>> > > > > On 7/31/2019 1:44 PM, Santosh P K >>>>>>> wrote: >>>>>>> > > > > > I have checked with >>>>>>> implementation >>>>>>> > in data >>>>>>> > > path. >>>>>>> > > > When we >>>>>>> > > > > receive a >>>>>>> > > > > > packet with valid VNI then >>>>>>> lookup >>>>>>> > for MAC will >>>>>>> > > > happen and >>>>>>> > > > > it is VTEP own >>>>>>> > > > > > MAC then it will be trapped to >>>>>>> control >>>>>>> > > plane for >>>>>>> > > > > processing. I think we >>>>>>> > > > > > can have following options >>>>>>> > > > > > 1. Optional managment VNI >>>>>>> > > > > > 2. Mandatory inner MAC set to >>>>>>> VTEP mac >>>>>>> > > > > > 3. Inner IP TTL set to 1 to >>>>>>> avoid >>>>>>> > > forwarding of packet >>>>>>> > > > > via inner IP >>>>>>> > > > > > address. >>>>>>> > > > > > >>>>>>> > > > > > >>>>>>> > > > > > Thoughts? >>>>>>> > > > > > >>>>>>> > > > > > Thansk >>>>>>> > > > > > Santosh P K >>>>>>> > > > > > >>>>>>> > > > > > On Wed, Jul 31, 2019 at 9:20 >>>>>>> AM Greg >>>>>>> > Mirsky >>>>>>> > > > > >>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>> >>>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>>> >>>>>>> > > > >>>>>> > >>>>>> > > >>>>>>> > > >>>>>> gregimirsky@gmail.com> >>>>>>> > >>>>>> >>>> >>>>>>> > > > > > >>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>> >>>>>>> > > > >>>>>> > >>>>>> > >> >>>>>>> > > > > >>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>> >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > >>>>> wrote: >>>>>>> > > > > > >>>>>>> > > > > > Hi Dinesh, >>>>>>> > > > > > thank you for your >>>>>>> consideration >>>>>>> > of the >>>>>>> > > > proposal and >>>>>>> > > > > questions. What >>>>>>> > > > > > would you see as the scope >>>>>>> of >>>>>>> > testing the >>>>>>> > > > > connectivity for the >>>>>>> > > > > > specific VNI? If it is >>>>>>> > > tenant-to-tenant, then >>>>>>> > > > VTEPs >>>>>>> > > > > will treat these >>>>>>> > > > > > packets as regular user >>>>>>> frames. More >>>>>>> > > likely, these >>>>>>> > > > > could be Layer 2 >>>>>>> > > > > > OAM, e.g. CCM frames. The >>>>>>> reason >>>>>>> > to use >>>>>>> > > 127/8 for >>>>>>> > > > > IPv4, and >>>>>>> > > > > > 0:0:0:0:0:FFFF:7F00:0/104 >>>>>>> for >>>>>>> > IPv6 is >>>>>>> > > to safeguard >>>>>>> > > > > from leaking >>>>>>> > > > > > Ethernet frames with BFD >>>>>>> Control >>>>>>> > packet >>>>>>> > > to a >>>>>>> > > > tenant. >>>>>>> > > > > > You've suggested using a >>>>>>> MAC >>>>>>> > address to >>>>>>> > > trap the >>>>>>> > > > > control packet at >>>>>>> > > > > > VTEP. What that address >>>>>>> could be? We >>>>>>> > > had proposed >>>>>>> > > > > using the >>>>>>> > > > > > dedicated MAC and VTEP's >>>>>>> MAC and >>>>>>> > both >>>>>>> > > raised >>>>>>> > > > concerns >>>>>>> > > > > among VXLAN >>>>>>> > > > > > experts. The idea of using >>>>>>> > Management >>>>>>> > > VNI may >>>>>>> > > > be more >>>>>>> > > > > acceptable >>>>>>> > > > > > based on its similarity to >>>>>>> the >>>>>>> > practice >>>>>>> > > of using >>>>>>> > > > > Management VLAN. >>>>>>> > > > > > >>>>>>> > > > > > Regards, >>>>>>> > > > > > Greg >>>>>>> > > > > > >>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>> 12:03 PM >>>>>>> > Dinesh >>>>>>> > > Dutt >>>>>>> > > > > >>>>>> > >>>>>> > > >>>>>>> > > >>>>>>> > >> >>>>>>> > > > >>>>>> didutt@gmail.com> >>>>>>> > > >>>>>>> > > >>>>>>> > >>> >>>>>>> > > > > > >>>>>> > >>>>>>> > > > >>>>>>> > > > >>>>>> didutt@gmail.com> >>>>>>> > >> >>>>>>> > > >>>>>>> > > >>>>>>> > > > >>>>>> didutt@gmail.com> >>>>>>> > >>>>> >>>>>>> > > > > wrote: >>>>>>> > > > > > >>>>>>> > > > > > Hi Greg, >>>>>>> > > > > > >>>>>>> > > > > > As long as the inner >>>>>>> MAC >>>>>>> > address is >>>>>>> > > such >>>>>>> > > > that the >>>>>>> > > > > packet is >>>>>>> > > > > > trapped to the CPU, it >>>>>>> should be >>>>>>> > > fine for >>>>>>> > > > use as >>>>>>> > > > > an inner MAC is >>>>>>> > > > > > it not? Stating that is >>>>>>> > better than >>>>>>> > > trying to >>>>>>> > > > > force a management >>>>>>> > > > > > VNI. What if someone >>>>>>> wants >>>>>>> > to test >>>>>>> > > > connectivity >>>>>>> > > > > on a specific >>>>>>> > > > > > VNI? I would not pick a >>>>>>> > loopback IP >>>>>>> > > > address for >>>>>>> > > > > this since that >>>>>>> > > > > > address range is >>>>>>> host/node local >>>>>>> > > only. Is >>>>>>> > > > there a >>>>>>> > > > > reason you're >>>>>>> > > > > > not using the VTEP IP >>>>>>> as the >>>>>>> > inner IP >>>>>>> > > > address ? >>>>>>> > > > > > >>>>>>> > > > > > Dinesh >>>>>>> > > > > > >>>>>>> > > > > > On Wed, Jul 31, 2019 >>>>>>> at 5:48 AM >>>>>>> > > Greg Mirsky >>>>>>> > > > > > >>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>> >>>>>>> > > > >>>>>> > >>>>>> > >> >>>>>>> > > > > >>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>> >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > >>> >>>>>> gregimirsky@gmail.com >>>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>> >>>>>>> > > > >>>>>> > >>>>>> > >> >>>>>>> > > > > >>>>>> > >>>>>>> > > >>>>>> gregimirsky@gmail.com>> >>>>>>> > > > >>>>>> > >>>>>>> > > >>>>>> > >>>>> wrote: >>>>>>> > > > > > >>>>>>> > > > > > Dear All, >>>>>>> > > > > > thank you for your >>>>>>> comments, >>>>>>> > > > suggestions on >>>>>>> > > > > this issue, >>>>>>> > > > > > probably the most >>>>>>> > challenging >>>>>>> > > for this >>>>>>> > > > > specification. In the >>>>>>> > > > > > course of our >>>>>>> discussions, >>>>>>> > > we've agreed to >>>>>>> > > > > abandon the >>>>>>> > > > > > request to >>>>>>> allocate the >>>>>>> > > dedicated MAC >>>>>>> > > > address >>>>>>> > > > > to be used as >>>>>>> > > > > > the destination MAC >>>>>>> > address in >>>>>>> > > the inner >>>>>>> > > > > Ethernet frame. >>>>>>> > > > > > Also, earlier >>>>>>> using VNI >>>>>>> > 0 was >>>>>>> > > changed from >>>>>>> > > > > mandatory to one >>>>>>> > > > > > of the options an >>>>>>> > > implementation may >>>>>>> > > > offer to >>>>>>> > > > > an operator. >>>>>>> > > > > > The most recent >>>>>>> > discussion was >>>>>>> > > whether >>>>>>> > > > VTEP's >>>>>>> > > > > MAC address >>>>>>> > > > > > might be used as >>>>>>> the >>>>>>> > > destination MAC >>>>>>> > > > address >>>>>>> > > > > in the inner >>>>>>> > > > > > Ethernet frame. As >>>>>>> I >>>>>>> > recall it, the >>>>>>> > > > comments >>>>>>> > > > > from VXLAN >>>>>>> > > > > > experts equally >>>>>>> split >>>>>>> > with one >>>>>>> > > for it >>>>>>> > > > and one >>>>>>> > > > > against. Hence >>>>>>> > > > > > I would like to >>>>>>> propose >>>>>>> > a new >>>>>>> > > text to >>>>>>> > > > resolve >>>>>>> > > > > the issue. The >>>>>>> > > > > > idea is to let an >>>>>>> > operator select >>>>>>> > > > Management >>>>>>> > > > > VNI and use >>>>>>> > > > > > that VNI in VXLAN >>>>>>> > encapsulation >>>>>>> > > of BFD >>>>>>> > > > > Control packets: >>>>>>> > > > > > NEW TEXT: >>>>>>> > > > > > >>>>>>> > > > > > An operator >>>>>>> MUST >>>>>>> > select a VNI >>>>>>> > > > number to >>>>>>> > > > > be used as >>>>>>> > > > > > Management >>>>>>> VNI. VXLAN >>>>>>> > > packet for >>>>>>> > > > > Management VNI MUST NOT >>>>>>> > > > > > be sent to a >>>>>>> tenant. VNI >>>>>>> > > number 1 is >>>>>>> > > > > RECOMMENDED as the >>>>>>> > > > > > default for >>>>>>> > Management VNI. >>>>>>> > > > > > >>>>>>> > > > > > With that new >>>>>>> text, what >>>>>>> > can be the >>>>>>> > > > value of >>>>>>> > > > > the destination >>>>>>> > > > > > MAC in the inner >>>>>>> Ethernet? I >>>>>>> > > tend to >>>>>>> > > > believe >>>>>>> > > > > that it can be >>>>>>> > > > > > anything and >>>>>>> ignored by the >>>>>>> > > reciever VTEP. >>>>>>> > > > > Also, if the >>>>>>> > > > > > trapping is based >>>>>>> on VNI >>>>>>> > > number, the >>>>>>> > > > > destination IP address >>>>>>> > > > > > of the inner IP >>>>>>> packet >>>>>>> > can from >>>>>>> > > the range >>>>>>> > > > > 127/8 for IPv4, >>>>>>> > > > > > and for IPv6 from >>>>>>> the range >>>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>>>>> > > > > > lastly, the TTL to >>>>>>> be >>>>>>> > set to 1 (no >>>>>>> > > > change here). >>>>>>> > > > > > >>>>>>> > > > > > Much appreciate >>>>>>> your >>>>>>> > comments, >>>>>>> > > > questions, and >>>>>>> > > > > suggestions. >>>>>>> > > > > > >>>>>>> > > > > > Best regards, >>>>>>> > > > > > Greg >>>>>>> > > > > > >>>>>>> > > > > >>>>>>> > > > >>>>>>> > > >>>>>>> > >>>>>>> >>>>>> --000000000000c787f6058f684a21 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Dinesh,
thank you for your expedient detailed respo= nse.
I believe that the ability to run BFD session up to a tenant= (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this specif= ication.
I'm trying to provide precise specification on what = can be used ad the destination MAC and IP addresses in the inner frame/pack= et as I believe that likely will help to avoid interoperability issues.
I'm interested to learn some more about the "martian checki= ng" function. As you know, martian addresses have been used as destina= tion IP address in LSP Ping and BFD over MPLS LSP and PW. I haven't hea= rd that any silicon feature caused problems for operators using these tools= .

Regards,
Greg

On Mon, Aug 5, 2019= at 3:59 PM Dinesh Dutt <didutt@gmai= l.com> wrote:
Hi Greg,

That we agree = on the problem definition is the first step forward. Your original document= had my cases covered and so I was surprised by the track this thread took.= It doesn't matter, we're back on track.

M= y recommendation is to not worry about specifying the precise MAC/IP addres= s used in the inner header. The addresses chosen MUST ensure that the packe= t is trapped to the control plane of the VTEP and not escape to the tenant = if the BFD is to the VTEP. Any solution MUST also not preclude the use of t= he BFD by tenant systems for that VNI. There are many ways an implementer c= an choose to implement this. For example, the inner MAC address is whatever= the VTEP implementer would return if ARP'd for the IP address used in = the inner header in the given VNI. The implementer can pick a fixed MAC add= ress, one that they own etc. Multiple BFD sessions can be run for testing p= ath connectivity on more than one VNIs. Limits should be in place to avoid = overwhelming the receiver with BFD messages (you had words about this in yo= ur currently published draft).=C2=A0 If the VNI is irrelevant in the test i= .e. only the VXLAN pipe at the VTEP is being tested. the user can use any V= NI active on the VTEP on which the VTEP owns an IP address.

<= /div>
I'm concerned about the use of 127/8 address only because of = firewalls or implementations that drop packets with these addresses as eith= er the source or destination. For example, on many merchant silicon, I don&= #39;t believe you can turn off martian checking and drops *only* for VXLAN-= encapsulated BFD packets. I don't know what the Linux kernel does today= on such packets, for example (or Hyper-V). I'd like a solution that do= esn't demand additional or new chip functionality or require additional= middle-box hole punch.

Why do you feel you MUST t= o specify the MAC/IP address on the inner packet? What am I missing here?

Dinesh

On Mon, Aug 5, 2019 at 3:04 PM = Greg Mirsky <= gregimirsky@gmail.com> wrote:
Hi Dinesh,
what = do you see as the way forward? I agree, that the proposed text doesn't = work for multi-VNI concurrent monitoring because these VNIs are tenant'= s VNIs. And in that case, we need to specify another mechanism to trap the = BFD Control packet at VTEP. It seems that VTEP's Ethernet address must = be used as the destination MAC address in the inner Ethernet frame. The des= tination IP address may be either VTEP's address of martian (I do prefe= r martian). Let me give it=C2=A0 try:
NEW TEXT:
To monitor continuity of the path between two VTEPs, an o= perator MUST select a VNI number to be used as Management VNI. Management V= NI number MUST NOT be one of the tenant's VNIs to prevent sending VXLAN= packets received on Management VNI to a tenant. VNI number 1 is RECOMMENDE= D as the default for Management VNI. [Ed.note: What we set the Destination = MAC to? Can it be invalid MAC that MUST be ignored on receipt?]
=
If an implementation supports concurre= nt monitoring of multiple VNIs, then the value of VNI number MAY be one of = tenant's VNIs. The destination MAC address in the inner Ethernet frame = encapsulating BFD Control packet MUST be MAC associated with the remote VTE= P.=C2=A0
The destination IP address of the inner IP packet MUST b= e selected from the range 127/8 for IPv4, and for IPv6 from the range 0:0:0= :0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set to 1= .

Regards,
Greg=C2=A0

On Sun, Aug 4= , 2019 at 9:07 AM Dinesh Dutt <didutt@gmail.com> wrote:
Hi Greg,

<= /div>
Thanks for your clarifications. I agree with your sentiment on wh= y you're running BFD over VXLAN between VTEPs. I wasn't arguing aga= inst it at all. All I was saying was pointing to the limitations of the use= of management VNI. I spoke to some operators who're running EVPN and m= entioned the discussion on this thread. They concur that they're using = specific VNIs to test connectivity over that VNI between VTEPs to ensure mi= sconfiguration doesn't lead to blackholes. My statements are based in r= eal world operator experience. And I was providing language that ensured pa= ckets didn't leak across to tenants when they were destined to VTEPs.

Dinesh

On Sat, Aug 3, 2019 at 10:34 AM Gre= g Mirsky <gre= gimirsky@gmail.com> wrote:
Hi Dinesh,
many thanks for your deta= iled updates on how some implementations process VXLAN header and the inner= Ethernet frame. These are very helpful in achieving the workable solution = for the problem at hand.
You've noted that a path between VTE= Ps may be monitored in the underlay network by merely establishing a BFD se= ssion. That is true, but by using BFD with VXLAN encapsulation between the = pair of VTEPs we are extending the OAM domain by including, to some extent,= VXLAN forwarding engine. Abstract in RFC 5880 defines the goal and the dom= ain in which BFD protocol can detect a fault as:
=C2=A0 =C2=A0Thi= s document describes a protocol intended to detect faults in the
=C2=A0 = =C2=A0bidirectional path between two forwarding engines, including
=C2= =A0 =C2=A0interfaces, data link(s), and to the extent possible the forwardi= ng
=C2=A0 =C2=A0engines themselves, with potentially very low latency.= =C2=A0
Thus, BFD in the underlay will exercise a part of IP f= orwarding engine while BFD with VXLAN encapsulation, ran between the same p= air of VTEPs, extends the OAM domain. At the same time, defining BFD betwee= n tenant systems in outside the goal of this specification. But VXLAN BFD s= ession between VTEPs may be useful in monitoring e2e path between tenants, = as described in the update to -07:
=C2=A0 =C2=A0At the same time,= a service layer BFD session may be used between the
=C2=A0 =C2=A0tenant= s of VTEPs IP1 and IP2 to provide end-to-end fault management.
=C2=A0 = =C2=A0In such case, for VTEPs BFD control packets of that session are
= =C2=A0 =C2=A0indistinguishable from data packets.=C2=A0 If end-to-end defec= t detection
=C2=A0 =C2=A0is realized as the set of concatenated OAM doma= ins, e.g., VM1-1 - IP1
=C2=A0 =C2=A0-- IP2 - VM2-1, then the BFD session= over VXLAN between VTEPs SHOULD
=C2=A0 =C2=A0follow the procedures desc= ribed in Section 6.8.17 [RFC5880].
I've attached the curr= ent working version of the draft.

Regards,
Greg


On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt &l= t;didutt@gmail.com> wrote:
What I mean is "How do you infer that it excludes t= he case I'm talking about?".

Dinesh<= br>

On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt <didutt@gmail.com> wrote:
The abs= tract reads this: "
This document describes the use of the Bid=
irectional Forwarding
   Detection (BFD) protocol in point-to-point Virtual eXtensible Local
   Area Network (VXLAN) tunnels forming up an overlay network."
How do you infer w=
hat you said?

Dinesh

On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halp= ern <jmh@joelha= lpern.com> wrote:
I am going by what the draft says its purpose is.=C2=A0 If you (= Dinesh) want
the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft.
As currently written, the behavior Greg proposed meets the needs, and
does so in a way that is consistent with VxLAN.

Yours,
Joel

On 8/2/2019 8:30 PM, Dinesh Dutt wrote:
> What is the stated purpose of this BFD session? The VTEP reachability = is
> determined by the underlay, I don't need VXLAN-encaped packet for = that.
> Do we agree?
>
> If I want to test the VXLAN encap/decap functionality alone, picking a= ny
> single VNI maybe fine. But is this all any network operator wants? Why= ?
> In what situations has this been a problem? I suspect operators also <= br> > want to verify path continuity over a specific VNI. If you say this is=
> not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs <= br> > (see section 3). More importantly, this is a real problem that operato= rs
> like to verify.
>
> Dinesh
>
> On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jm= h@joelhalpern.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0What is special about the management VNI is precise= ly that it is NOT a
>=C2=A0 =C2=A0 =C2=A0tenant VNI.=C2=A0 The VxLAN administration does kno= w how it allocates VNI to
>=C2=A0 =C2=A0 =C2=A0tenants, and which VNI it has allocated.=C2=A0 In c= ontrast, it does not know
>=C2=A0 =C2=A0 =C2=A0which IP addresses or MAC adddresses teh tenant is = using or may plan
>=C2=A0 =C2=A0 =C2=A0to use.
>
>=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0Joel
>
>=C2=A0 =C2=A0 =C2=A0On 8/2/2019 6:41 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 > The assumption of an IP address within any VN= I is suspect that way.
>=C2=A0 =C2=A0 =C2=A0 > What's special about a single VNI, the ma= nagement VNI? The VTEP IP
>=C2=A0 =C2=A0 =C2=A0 > address does not belong in reality in any VNI= .
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halper= n
>=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>= wrote:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Your response seems to mis= s two points:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0First, the problem you des= cribe is not what the document says
>=C2=A0 =C2=A0 =C2=A0it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0solving.=C2=A0 To the degr= ee it discusses it at all, the document
>=C2=A0 =C2=A0 =C2=A0says "
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 =C2=A0In
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0most cases, a single BFD s= ession is sufficient for the given
>=C2=A0 =C2=A0 =C2=A0VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the reachability o= f a remote VTEP, regardless of the
>=C2=A0 =C2=A0 =C2=A0number of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNIs in common. "
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Second, you assume the exi= stence of an IP address for a VTEP
>=C2=A0 =C2=A0 =C2=A0within a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI.=C2=A0 As with the MAC= address, the VTEP does not have an IP
>=C2=A0 =C2=A0 =C2=A0address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0within the VNI.=C2=A0 Some= implementations may have created such a
>=C2=A0 =C2=A0 =C2=A0thing,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0but
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the general construct, as = defined to date, does not support such.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0In short, you are requirin= g a behavior that violates the
>=C2=A0 =C2=A0 =C2=A0architectural
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0structure of overlay / und= erlay separation, and common
>=C2=A0 =C2=A0 =C2=A0usage.=C2=A0 And you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0are doing so to support a = use case that the working group has not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0indicated in the document = as important.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0On 8/2/2019 5:01 PM, Dines= h Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > You understood corre= ctly.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > The VNIs may not sha= re fate due to misconfiguration. And I
>=C2=A0 =C2=A0 =C2=A0strongly
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > suspect someone will= want to use BFD for that because its
>=C2=A0 =C2=A0 =C2=A0about
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0checking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > path continuity as s= tated by the draft. As long as there's a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0valid IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > (because it's BF= D) owned by the VTEP in that VNI, you can
>=C2=A0 =C2=A0 =C2=A0use BFD in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > that VNI. Thats all = that you need to dictate.=C2=A0 That IP address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0has a MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > address and you can = use that on the inner frame. That is
>=C2=A0 =C2=A0 =C2=A0all normal
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > VXLAN processing. Th= e outer IP is always that of the VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 = at 11:03 AM Joel M. Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com= >
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com &= lt;mailto:jmh@joel= halpern.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>> w= rote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0I= f I am reading your various emails correctly Dinesh
>=C2=A0 =C2=A0 =C2=A0(and I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0may have
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0m= issed something) you are trying to use the MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0because you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= ant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= o be able to send these BFD packets over arbitrary VNI to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= NI.=C2=A0 That is not a requirement identified in the
>=C2=A0 =C2=A0 =C2=A0document.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0It is not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= ven a problem I understand, since all the VNI between an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0ingress and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= gress VTEP share fate.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Y= ours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0J= oel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0O= n 8/2/2019 1:44 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Thanks for verifying this. On Linux and hardware
>=C2=A0 =C2=A0 =C2=A0routers
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0that I'm
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ware
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > of (Cisco circa 2012 and Cumulus), the physical MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eused
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > across the VNIs on the VTEP. Did you check on a non-VMW
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0device?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0T= his is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > more for my own curiosity.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > To address the general case, can we not define a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0well-known (or
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eserve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > one) unicast MAC address for use with VTEP? If the MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > configurable in BFD command, this can be moot.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > <= santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0I have cross checked point raised about MAC address=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0usage. It is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0possible that tenant could be using physical MAC >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= hen a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packet comes with valid VNI with a MAC address
>=C2=A0 =C2=A0 =C2=A0that is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0being
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= sed by
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0tenant then packet will be sent to that tenant.
>=C2=A0 =C2=A0 =C2=A0This rules
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ut the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0fact that we could use physical MAC address as
>=C2=A0 =C2=A0 =C2=A0inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0MAC to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= nsure
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packets get terminated at VTEP itself.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 11:00 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0<santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks for your inputs.= I checked
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation within
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Vmware. Perhaps I should have been mo= re clear
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0about MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0space while checking internally. I wi= ll cross
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0check again for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the same and get back on this list. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 10:54 AM Joel= M.
>=C2=A0 =C2=A0 =C2=A0Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:jmh@joel= halpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>>&g= t; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sorry to ask a stupid q= uestion.=C2=A0 Whose
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The reason I ask is tha= t as far as I
>=C2=A0 =C2=A0 =C2=A0can tell,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0since the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tenant does not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have any control access= to the VTEP,
>=C2=A0 =C2=A0 =C2=A0there is no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eason for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have a MAC address in t= he tenant
>=C2=A0 =C2=A0 =C2=A0space.=C2=A0 Yes, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0d= evice has
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a physical
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address.=C2=A0 But = the tenant could well be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0using that MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address.=C2=A0 Yes,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they would be violating= the Ethernet spec.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0But the whole
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0point of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0segregation is not to c= are about such
>=C2=A0 =C2=A0 =C2=A0issues.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On the other hand, if y= ou tell me that
>=C2=A0 =C2=A0 =C2=A0the VMWare
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0implementation has an >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet address that i= s part of the tenant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0space, well,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they made up
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this particular game. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 7/31/2019 1:44 PM, S= antosh P K wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > I have checked wi= th implementation
>=C2=A0 =C2=A0 =C2=A0in data
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0path.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0W= hen we
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0receive a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > packet with valid= VNI then lookup
>=C2=A0 =C2=A0 =C2=A0for MAC will
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0h= appen and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it is VTEP own
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > MAC then it will = be trapped to control
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0plane for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0processing. I think we<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > can have followin= g options
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 1. Optional manag= ment VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 2. Mandatory inne= r MAC set to VTEP mac
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 3. Inner IP TTL s= et to 1 to avoid
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0forwarding of packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0via inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > address.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thoughts?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thansk
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > On Wed, Jul 31, 2= 019 at 9:20 AM Greg
>=C2=A0 =C2=A0 =C2=A0Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>&g= t;>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > <mailto:gregimirsky@gmail.com<= /a>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0thank you for your consideration
>=C2=A0 =C2=A0 =C2=A0of the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0p= roposal and
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0had proposed
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>=C2=A0 =C2=A0 =C2=A0Management
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Regards,
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0On Wed, Jul 31, 2019 at 12:03 PM
>=C2=A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Dutt
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>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com> <mailto:didutt@gmail.com
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Hi Greg,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
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>=C2=A0 =C2=A0 =C2=A0inner IP
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Greg Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>> <mailto:gregimirsky@gmail.c= om
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0s= uggestions on
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this issue,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most
>=C2=A0 =C2=A0 =C2=A0challenging
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for this
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0specification. In the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussions,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0we've agreed to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0abandon the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0dedicated MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0to be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC
>=C2=A0 =C2=A0 =C2=A0address in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI
>=C2=A0 =C2=A0 =C2=A00 was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0changed from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0mandatory to one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation may
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ffer to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an operator.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent
>=C2=A0 =C2=A0 =C2=A0discussion was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0whether
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEP's
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0destination MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0in the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I
>=C2=A0 =C2=A0 =C2=A0recall it, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= omments
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0from VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split
>=C2=A0 =C2=A0 =C2=A0with one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for it
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= nd one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0against. Hence
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose
>=C2=A0 =C2=A0 =C2=A0a new
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0text to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= esolve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the issue. The
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0idea is to let an
>=C2=A0 =C2=A0 =C2=A0operator select
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0M= anagement
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI and use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN
>=C2=A0 =C2=A0 =C2=A0encapsulation
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of BFD
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Control packets:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operator MUST
>=C2=A0 =C2=A0 =C2=A0select a VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0n= umber to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI. VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0packet for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI MUST NOT=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent to a tenant. VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number 1 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default for
>=C2=A0 =C2=A0 =C2=A0Management VNI.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, what
>=C2=A0 =C2=A0 =C2=A0can be the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0v= alue of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethernet? I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tend to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= elieve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that it can be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0reciever VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, if the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0destination IP address<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet
>=C2=A0 =C2=A0 =C2=A0can from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/1= 04. And
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be
>=C2=A0 =C2=A0 =C2=A0set to 1 (no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= hange here).
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your
>=C2=A0 =C2=A0 =C2=A0comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0q= uestions, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0suggestions.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >
>
--000000000000c787f6058f684a21-- From nobody Tue Aug 6 05:08:49 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 65684120094; Mon, 5 Aug 2019 18:03:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EX6aMMfnFO_e; Mon, 5 Aug 2019 18:03:44 -0700 (PDT) Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [IPv6:2a00:1450:4864:20::32f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 59ACE120045; Mon, 5 Aug 2019 18:03:43 -0700 (PDT) Received: by mail-wm1-x32f.google.com with SMTP id v19so74711360wmj.5; Mon, 05 Aug 2019 18:03:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=LA3z3F41hC0FTMRK0pMmaoEzdF8NWfQy3be84EXak9I=; b=cVl8qEH4vC8QiuFq+UbiDKTVVSq1X7BdXGGjvcz74TfXwS0HIImfA5Sy045s64ZW1L 8QSjKmTV70aLKDn9g3UyRYM6jR4K00YuqF08ZH8tX5HUMsvrQjJFMRwYeSG8K7FW8iQu 7kgculGfSZWF1Ia5A+co8UqZmfVy25uvuugbX8AFIVncMArqIDwStlSm1shkiTJ/AHKT n08+LfRDxFXFVOiGSWcJvBF5AXd89WAYF7W/HNLoWXJOtfsKbQpKYhAXvDqg4C3VYLbL ZvQbkLK5b25Az77JjZ6FzYZatTH2bRavbxe6jFWAOotdzaWHS0ee8tGP7dwolaRbJYXA Ij1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=LA3z3F41hC0FTMRK0pMmaoEzdF8NWfQy3be84EXak9I=; b=Qn8argdPDTtNDccHaoF48takJ53koJa+ybCopqDBqaDmoxOFa3dnmc7BXHHJVdCzAa ONzU+3I9pVVGzuE0bdRQ0rGaSD1HKtrQMTpa6rrMsKrpKTWa4R24f4ysX46xg76B2zee JEiwHK769SCwHpfu+NgeAULEEMqa/xdlVGnxoGCd90AMgw+9+NVbAtCicrxfeGNmcmXT 0YZxFl0dmNjQXXK+rk1FWZ+n0e+Djaz7SaypqKY/lN1gQa18aIzwEYq4BJTUKhg1QbZ5 4hz9NDYTRXwb7A+qOGcbSKfZg00VQZd9cg5xVXxWETKnXl/m5/uhVUp6vwa175aCHTl+ 4Ogw== X-Gm-Message-State: APjAAAX/EvFuOcc2dKmjn0JiFyLDUm9s66mGalTI+BGCvoiaNGCGcVP6 ZSHDW/8BiiZK0spS/Rr1Ih1qsecSiCwjp/vkknc3Fljc X-Google-Smtp-Source: APXvYqz2ItVq6jXsk+JIMeKPJAYvQbHN9Keys8zJaOHXrbO2JoFXFR05ld+Hay6xxzHuX75MhrLi9xdFJMhyG7ctZEE= X-Received: by 2002:a1c:238e:: with SMTP id j136mr742720wmj.144.1565053421509; Mon, 05 Aug 2019 18:03:41 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Dinesh Dutt Date: Mon, 5 Aug 2019 18:03:28 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Greg Mirsky Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="0000000000003e638d058f68650e" Archived-At: X-Mailman-Approved-At: Tue, 06 Aug 2019 05:08:06 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Aug 2019 01:03:51 -0000 --0000000000003e638d058f68650e Content-Type: text/plain; charset="UTF-8" On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky wrote: > Hi Dinesh, > thank you for your expedient detailed response. > I believe that the ability to run BFD session up to a tenant > (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this > specification. > I'm trying to provide precise specification on what can be used ad the > destination MAC and IP addresses in the inner frame/packet as I believe > that likely will help to avoid interoperability issues. > I'm interested to learn some more about the "martian checking" function. > As you know, martian addresses have been used as destination IP address in > LSP Ping and BFD over MPLS LSP and PW. I haven't heard that any silicon > feature caused problems for operators using these tools. > Interesting. I didn't know this aspect of use with MPLS ping. Did those packets ever go through a firewall though? In any case, maybe suggest the use of those addresses with a statement that this is how LSP does it, but that other MAC/IP pairs are possible as long as the conditions of the endpoint owning the MAC/IP was honored. Dinesh > > Regards, > Greg > > On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt wrote: > >> Hi Greg, >> >> That we agree on the problem definition is the first step forward. Your >> original document had my cases covered and so I was surprised by the track >> this thread took. It doesn't matter, we're back on track. >> >> My recommendation is to not worry about specifying the precise MAC/IP >> address used in the inner header. The addresses chosen MUST ensure that the >> packet is trapped to the control plane of the VTEP and not escape to the >> tenant if the BFD is to the VTEP. Any solution MUST also not preclude the >> use of the BFD by tenant systems for that VNI. There are many ways an >> implementer can choose to implement this. For example, the inner MAC >> address is whatever the VTEP implementer would return if ARP'd for the IP >> address used in the inner header in the given VNI. The implementer can pick >> a fixed MAC address, one that they own etc. Multiple BFD sessions can be >> run for testing path connectivity on more than one VNIs. Limits should be >> in place to avoid overwhelming the receiver with BFD messages (you had >> words about this in your currently published draft). If the VNI is >> irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being >> tested. the user can use any VNI active on the VTEP on which the VTEP owns >> an IP address. >> >> I'm concerned about the use of 127/8 address only because of firewalls or >> implementations that drop packets with these addresses as either the source >> or destination. For example, on many merchant silicon, I don't believe you >> can turn off martian checking and drops *only* for VXLAN-encapsulated BFD >> packets. I don't know what the Linux kernel does today on such packets, for >> example (or Hyper-V). I'd like a solution that doesn't demand additional or >> new chip functionality or require additional middle-box hole punch. >> >> Why do you feel you MUST to specify the MAC/IP address on the inner >> packet? What am I missing here? >> >> Dinesh >> >> On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky wrote: >> >>> Hi Dinesh, >>> what do you see as the way forward? I agree, that the proposed text >>> doesn't work for multi-VNI concurrent monitoring because these VNIs are >>> tenant's VNIs. And in that case, we need to specify another mechanism to >>> trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address >>> must be used as the destination MAC address in the inner Ethernet frame. >>> The destination IP address may be either VTEP's address of martian (I do >>> prefer martian). Let me give it try: >>> NEW TEXT: >>> >>> To monitor continuity of the path between two VTEPs, an operator MUST >>> select a VNI number to be used as Management VNI. Management VNI number >>> MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets >>> received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the >>> default for Management VNI. [Ed.note: What we set the Destination MAC to? >>> Can it be invalid MAC that MUST be ignored on receipt?] >>> >>> If an implementation supports concurrent monitoring of multiple VNIs, >>> then the value of VNI number MAY be one of tenant's VNIs. The destination >>> MAC address in the inner Ethernet frame encapsulating BFD Control packet >>> MUST be MAC associated with the remote VTEP. >>> The destination IP address of the inner IP packet MUST be selected from >>> the range 127/8 for IPv4, and for IPv6 from the range >>> 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set >>> to 1. >>> >>> Regards, >>> Greg >>> >>> On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: >>> >>>> Hi Greg, >>>> >>>> Thanks for your clarifications. I agree with your sentiment on why >>>> you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at >>>> all. All I was saying was pointing to the limitations of the use of >>>> management VNI. I spoke to some operators who're running EVPN and mentioned >>>> the discussion on this thread. They concur that they're using specific VNIs >>>> to test connectivity over that VNI between VTEPs to ensure misconfiguration >>>> doesn't lead to blackholes. My statements are based in real world operator >>>> experience. And I was providing language that ensured packets didn't leak >>>> across to tenants when they were destined to VTEPs. >>>> >>>> Dinesh >>>> >>>> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >>>> wrote: >>>> >>>>> Hi Dinesh, >>>>> many thanks for your detailed updates on how some implementations >>>>> process VXLAN header and the inner Ethernet frame. These are very helpful >>>>> in achieving the workable solution for the problem at hand. >>>>> You've noted that a path between VTEPs may be monitored in the >>>>> underlay network by merely establishing a BFD session. That is true, but by >>>>> using BFD with VXLAN encapsulation between the pair of VTEPs we are >>>>> extending the OAM domain by including, to some extent, VXLAN forwarding >>>>> engine. Abstract in RFC 5880 defines the goal and the domain in which BFD >>>>> protocol can detect a fault as: >>>>> This document describes a protocol intended to detect faults in the >>>>> bidirectional path between two forwarding engines, including >>>>> interfaces, data link(s), and to the extent possible the forwarding >>>>> engines themselves, with potentially very low latency. >>>>> Thus, BFD in the underlay will exercise a part of IP forwarding engine >>>>> while BFD with VXLAN encapsulation, ran between the same pair of VTEPs, >>>>> extends the OAM domain. At the same time, defining BFD between tenant >>>>> systems in outside the goal of this specification. But VXLAN BFD session >>>>> between VTEPs may be useful in monitoring e2e path between tenants, as >>>>> described in the update to -07: >>>>> At the same time, a service layer BFD session may be used between >>>>> the >>>>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault management. >>>>> In such case, for VTEPs BFD control packets of that session are >>>>> indistinguishable from data packets. If end-to-end defect detection >>>>> is realized as the set of concatenated OAM domains, e.g., VM1-1 - >>>>> IP1 >>>>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD >>>>> follow the procedures described in Section 6.8.17 [RFC5880]. >>>>> I've attached the current working version of the draft. >>>>> >>>>> Regards, >>>>> Greg >>>>> >>>>> >>>>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: >>>>> >>>>>> What I mean is "How do you infer that it excludes the case I'm >>>>>> talking about?". >>>>>> >>>>>> Dinesh >>>>>> >>>>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: >>>>>> >>>>>>> The abstract reads this: " >>>>>>> >>>>>>> This document describes the use of the Bidirectional Forwarding >>>>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>>>> >>>>>>> How do you infer what you said? >>>>>>> >>>>>>> Dinesh >>>>>>> >>>>>>> >>>>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern >>>>>>> wrote: >>>>>>> >>>>>>>> I am going by what the draft says its purpose is. If you (Dinesh) >>>>>>>> want >>>>>>>> the draft to fulfill a different purpose, then either ask the >>>>>>>> chairs to >>>>>>>> take this draft back to the WG, or write a separate draft. >>>>>>>> As currently written, the behavior Greg proposed meets the needs, >>>>>>>> and >>>>>>>> does so in a way that is consistent with VxLAN. >>>>>>>> >>>>>>>> Yours, >>>>>>>> Joel >>>>>>>> >>>>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>>>> reachability is >>>>>>>> > determined by the underlay, I don't need VXLAN-encaped packet for >>>>>>>> that. >>>>>>>> > Do we agree? >>>>>>>> > >>>>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>>>> picking any >>>>>>>> > single VNI maybe fine. But is this all any network operator >>>>>>>> wants? Why? >>>>>>>> > In what situations has this been a problem? I suspect operators >>>>>>>> also >>>>>>>> > want to verify path continuity over a specific VNI. If you say >>>>>>>> this is >>>>>>>> > not defined by the document, I disagree because the current >>>>>>>> version >>>>>>>> > talks about controlling the number of BFD sessions between the >>>>>>>> VTEPs >>>>>>>> > (see section 3). More importantly, this is a real problem that >>>>>>>> operators >>>>>>>> > like to verify. >>>>>>>> > >>>>>>>> > Dinesh >>>>>>>> > >>>>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern < >>>>>>>> jmh@joelhalpern.com >>>>>>>> > > wrote: >>>>>>>> > >>>>>>>> > What is special about the management VNI is precisely that it >>>>>>>> is NOT a >>>>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>>>> allocates VNI to >>>>>>>> > tenants, and which VNI it has allocated. In contrast, it >>>>>>>> does not know >>>>>>>> > which IP addresses or MAC adddresses teh tenant is using or >>>>>>>> may plan >>>>>>>> > to use. >>>>>>>> > >>>>>>>> > Yours, >>>>>>>> > Joel >>>>>>>> > >>>>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>>>> > > The assumption of an IP address within any VNI is suspect >>>>>>>> that way. >>>>>>>> > > What's special about a single VNI, the management VNI? The >>>>>>>> VTEP IP >>>>>>>> > > address does not belong in reality in any VNI. >>>>>>>> > > >>>>>>>> > > Dinesh >>>>>>>> > > >>>>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>>>> > >>>>>>>> > > >> >>>>>>>> wrote: >>>>>>>> > > >>>>>>>> > > Your response seems to miss two points: >>>>>>>> > > >>>>>>>> > > First, the problem you describe is not what the >>>>>>>> document says >>>>>>>> > it is >>>>>>>> > > solving. To the degree it discusses it at all, the >>>>>>>> document >>>>>>>> > says " >>>>>>>> > > In >>>>>>>> > > most cases, a single BFD session is sufficient for the >>>>>>>> given >>>>>>>> > VTEP to >>>>>>>> > > monitor the reachability of a remote VTEP, regardless >>>>>>>> of the >>>>>>>> > number of >>>>>>>> > > VNIs in common. " >>>>>>>> > > >>>>>>>> > > Second, you assume the existence of an IP address for >>>>>>>> a VTEP >>>>>>>> > within a >>>>>>>> > > VNI. As with the MAC address, the VTEP does not have >>>>>>>> an IP >>>>>>>> > address >>>>>>>> > > within the VNI. Some implementations may have created >>>>>>>> such a >>>>>>>> > thing, >>>>>>>> > > but >>>>>>>> > > the general construct, as defined to date, does not >>>>>>>> support such. >>>>>>>> > > >>>>>>>> > > In short, you are requiring a behavior that violates >>>>>>>> the >>>>>>>> > architectural >>>>>>>> > > structure of overlay / underlay separation, and common >>>>>>>> > usage. And you >>>>>>>> > > are doing so to support a use case that the working >>>>>>>> group has not >>>>>>>> > > indicated in the document as important. >>>>>>>> > > >>>>>>>> > > Yours, >>>>>>>> > > Joel >>>>>>>> > > >>>>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>>>> > > > Joel, >>>>>>>> > > > >>>>>>>> > > > You understood correctly. >>>>>>>> > > > >>>>>>>> > > > The VNIs may not share fate due to >>>>>>>> misconfiguration. And I >>>>>>>> > strongly >>>>>>>> > > > suspect someone will want to use BFD for that >>>>>>>> because its >>>>>>>> > about >>>>>>>> > > checking >>>>>>>> > > > path continuity as stated by the draft. As long as >>>>>>>> there's a >>>>>>>> > > valid IP >>>>>>>> > > > (because it's BFD) owned by the VTEP in that VNI, >>>>>>>> you can >>>>>>>> > use BFD in >>>>>>>> > > > that VNI. Thats all that you need to dictate. That >>>>>>>> IP address >>>>>>>> > > has a MAC >>>>>>>> > > > address and you can use that on the inner frame. >>>>>>>> That is >>>>>>>> > all normal >>>>>>>> > > > VXLAN processing. The outer IP is always that of >>>>>>>> the VTEP. >>>>>>>> > > > >>>>>>>> > > > Dinesh >>>>>>>> > > > >>>>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>>>> > > >>>>>>>> > > >>>>>>>> > > > >>>>>>> jmh@joelhalpern.com> >>>>>>>> > >>> >>>>>>>> wrote: >>>>>>>> > > > >>>>>>>> > > > If I am reading your various emails correctly >>>>>>>> Dinesh >>>>>>>> > (and I >>>>>>>> > > may have >>>>>>>> > > > missed something) you are trying to use the MAC >>>>>>>> address >>>>>>>> > > because you >>>>>>>> > > > want >>>>>>>> > > > to be able to send these BFD packets over >>>>>>>> arbitrary VNI to >>>>>>>> > > monitor the >>>>>>>> > > > VNI. That is not a requirement identified in >>>>>>>> the >>>>>>>> > document. >>>>>>>> > > It is not >>>>>>>> > > > even a problem I understand, since all the VNI >>>>>>>> between an >>>>>>>> > > ingress and >>>>>>>> > > > egress VTEP share fate. >>>>>>>> > > > >>>>>>>> > > > Yours, >>>>>>>> > > > Joel >>>>>>>> > > > >>>>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>>>> > > > > Thanks for verifying this. On Linux and >>>>>>>> hardware >>>>>>>> > routers >>>>>>>> > > that I'm >>>>>>>> > > > aware >>>>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>>>> physical MAC >>>>>>>> > address is >>>>>>>> > > > reused >>>>>>>> > > > > across the VNIs on the VTEP. Did you check >>>>>>>> on a non-VMW >>>>>>>> > > device? >>>>>>>> > > > This is >>>>>>>> > > > > more for my own curiosity. >>>>>>>> > > > > >>>>>>>> > > > > To address the general case, can we not >>>>>>>> define a >>>>>>>> > > well-known (or >>>>>>>> > > > reserve >>>>>>>> > > > > one) unicast MAC address for use with VTEP? >>>>>>>> If the MAC >>>>>>>> > > address is >>>>>>>> > > > > configurable in BFD command, this can be >>>>>>>> moot. >>>>>>>> > > > > >>>>>>>> > > > > Dinesh >>>>>>>> > > > > >>>>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>>>>>>> > > > > >>>>>>> > >>>>>>>> > > >>>>>>> > > >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > >> >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > > >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > >>>> wrote: >>>>>>>> > > > > >>>>>>>> > > > > I have cross checked point raised about >>>>>>>> MAC address >>>>>>>> > > usage. It is >>>>>>>> > > > > possible that tenant could be using >>>>>>>> physical MAC >>>>>>>> > > address and >>>>>>>> > > > when a >>>>>>>> > > > > packet comes with valid VNI with a MAC >>>>>>>> address >>>>>>>> > that is >>>>>>>> > > being >>>>>>>> > > > used by >>>>>>>> > > > > tenant then packet will be sent to that >>>>>>>> tenant. >>>>>>>> > This rules >>>>>>>> > > > out the >>>>>>>> > > > > fact that we could use physical MAC >>>>>>>> address as >>>>>>>> > inner >>>>>>>> > > MAC to >>>>>>>> > > > ensure >>>>>>>> > > > > packets get terminated at VTEP itself. >>>>>>>> > > > > >>>>>>>> > > > > Thanks >>>>>>>> > > > > Santosh P K >>>>>>>> > > > > >>>>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM Santosh >>>>>>>> P K >>>>>>>> > > > > >>>>>>> > >>>>>>>> > > >>>>>>> > > >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > >> >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > > >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > >>>> >>>>>>>> > > > > wrote: >>>>>>>> > > > > >>>>>>>> > > > > Joel, >>>>>>>> > > > > Thanks for your inputs. I checked >>>>>>>> > > implementation within >>>>>>>> > > > > Vmware. Perhaps I should have been >>>>>>>> more clear >>>>>>>> > > about MAC >>>>>>>> > > > address >>>>>>>> > > > > space while checking internally. I >>>>>>>> will cross >>>>>>>> > > check again for >>>>>>>> > > > > the same and get back on this list. >>>>>>>> > > > > >>>>>>>> > > > > Thanks >>>>>>>> > > > > Santosh P K >>>>>>>> > > > > >>>>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM >>>>>>>> Joel M. >>>>>>>> > Halpern >>>>>>>> > > > > >>>>>>> > >>>>>>> > > >>>>>>>> > > >>>>>>> jmh@joelhalpern.com> >>>>>>>> > >> >>>>>>>> > > > >>>>>>> > >>>>>>> > > >>>>>>>> > > >>>>>>> jmh@joelhalpern.com> >>>>>>>> > >>>> >>>>>>>> wrote: >>>>>>>> > > > > >>>>>>>> > > > > Sorry to ask a stupid question. >>>>>>>> Whose >>>>>>>> > > implementation? >>>>>>>> > > > > >>>>>>>> > > > > The reason I ask is that as far >>>>>>>> as I >>>>>>>> > can tell, >>>>>>>> > > since the >>>>>>>> > > > > tenant does not >>>>>>>> > > > > have any control access to the >>>>>>>> VTEP, >>>>>>>> > there is no >>>>>>>> > > > reason for >>>>>>>> > > > > the VTEP to >>>>>>>> > > > > have a MAC address in the tenant >>>>>>>> > space. Yes, the >>>>>>>> > > > device has >>>>>>>> > > > > a physical >>>>>>>> > > > > MAC address. But the tenant >>>>>>>> could well be >>>>>>>> > > using that MAC >>>>>>>> > > > > address. Yes, >>>>>>>> > > > > they would be violating the >>>>>>>> Ethernet spec. >>>>>>>> > > But the whole >>>>>>>> > > > > point of >>>>>>>> > > > > segregation is not to care about >>>>>>>> such >>>>>>>> > issues. >>>>>>>> > > > > >>>>>>>> > > > > On the other hand, if you tell >>>>>>>> me that >>>>>>>> > the VMWare >>>>>>>> > > > > implementation has an >>>>>>>> > > > > Ethernet address that is part of >>>>>>>> the tenant >>>>>>>> > > space, well, >>>>>>>> > > > > they made up >>>>>>>> > > > > this particular game. >>>>>>>> > > > > >>>>>>>> > > > > Yours, >>>>>>>> > > > > Joel >>>>>>>> > > > > >>>>>>>> > > > > On 7/31/2019 1:44 PM, Santosh P >>>>>>>> K wrote: >>>>>>>> > > > > > I have checked with >>>>>>>> implementation >>>>>>>> > in data >>>>>>>> > > path. >>>>>>>> > > > When we >>>>>>>> > > > > receive a >>>>>>>> > > > > > packet with valid VNI then >>>>>>>> lookup >>>>>>>> > for MAC will >>>>>>>> > > > happen and >>>>>>>> > > > > it is VTEP own >>>>>>>> > > > > > MAC then it will be trapped >>>>>>>> to control >>>>>>>> > > plane for >>>>>>>> > > > > processing. I think we >>>>>>>> > > > > > can have following options >>>>>>>> > > > > > 1. Optional managment VNI >>>>>>>> > > > > > 2. Mandatory inner MAC set to >>>>>>>> VTEP mac >>>>>>>> > > > > > 3. Inner IP TTL set to 1 to >>>>>>>> avoid >>>>>>>> > > forwarding of packet >>>>>>>> > > > > via inner IP >>>>>>>> > > > > > address. >>>>>>>> > > > > > >>>>>>>> > > > > > >>>>>>>> > > > > > Thoughts? >>>>>>>> > > > > > >>>>>>>> > > > > > Thansk >>>>>>>> > > > > > Santosh P K >>>>>>>> > > > > > >>>>>>>> > > > > > On Wed, Jul 31, 2019 at 9:20 >>>>>>>> AM Greg >>>>>>>> > Mirsky >>>>>>>> > > > > >>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>> >>>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>>> >>>>>>>> > > > >>>>>>> > >>>>>>> > > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com> >>>>>>>> > >>>>>>> >>>> >>>>>>>> > > > > > >>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>> >>>>>>>> > > > >>>>>>> > >>>>>>> > >> >>>>>>>> > > > > >>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>> >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > >>>>> wrote: >>>>>>>> > > > > > >>>>>>>> > > > > > Hi Dinesh, >>>>>>>> > > > > > thank you for your >>>>>>>> consideration >>>>>>>> > of the >>>>>>>> > > > proposal and >>>>>>>> > > > > questions. What >>>>>>>> > > > > > would you see as the >>>>>>>> scope of >>>>>>>> > testing the >>>>>>>> > > > > connectivity for the >>>>>>>> > > > > > specific VNI? If it is >>>>>>>> > > tenant-to-tenant, then >>>>>>>> > > > VTEPs >>>>>>>> > > > > will treat these >>>>>>>> > > > > > packets as regular user >>>>>>>> frames. More >>>>>>>> > > likely, these >>>>>>>> > > > > could be Layer 2 >>>>>>>> > > > > > OAM, e.g. CCM frames. The >>>>>>>> reason >>>>>>>> > to use >>>>>>>> > > 127/8 for >>>>>>>> > > > > IPv4, and >>>>>>>> > > > > > 0:0:0:0:0:FFFF:7F00:0/104 >>>>>>>> for >>>>>>>> > IPv6 is >>>>>>>> > > to safeguard >>>>>>>> > > > > from leaking >>>>>>>> > > > > > Ethernet frames with BFD >>>>>>>> Control >>>>>>>> > packet >>>>>>>> > > to a >>>>>>>> > > > tenant. >>>>>>>> > > > > > You've suggested using a >>>>>>>> MAC >>>>>>>> > address to >>>>>>>> > > trap the >>>>>>>> > > > > control packet at >>>>>>>> > > > > > VTEP. What that address >>>>>>>> could be? We >>>>>>>> > > had proposed >>>>>>>> > > > > using the >>>>>>>> > > > > > dedicated MAC and VTEP's >>>>>>>> MAC and >>>>>>>> > both >>>>>>>> > > raised >>>>>>>> > > > concerns >>>>>>>> > > > > among VXLAN >>>>>>>> > > > > > experts. The idea of using >>>>>>>> > Management >>>>>>>> > > VNI may >>>>>>>> > > > be more >>>>>>>> > > > > acceptable >>>>>>>> > > > > > based on its similarity >>>>>>>> to the >>>>>>>> > practice >>>>>>>> > > of using >>>>>>>> > > > > Management VLAN. >>>>>>>> > > > > > >>>>>>>> > > > > > Regards, >>>>>>>> > > > > > Greg >>>>>>>> > > > > > >>>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>>> 12:03 PM >>>>>>>> > Dinesh >>>>>>>> > > Dutt >>>>>>>> > > > > >>>>>>> > >>>>>>> > > >>>>>>>> > > >>>>>>>> > >> >>>>>>>> > > > >>>>>>> didutt@gmail.com> >>>>>>>> > > >>>>>>>> > > >>>>>>>> > >>> >>>>>>>> > > > > > >>>>>>> > >>>>>>>> > > > >>>>>>>> > > > >>>>>>> didutt@gmail.com> >>>>>>>> > >> >>>>>>>> > > >>>>>>>> > > >>>>>>>> > > > >>>>>>> didutt@gmail.com> >>>>>>>> > >>>>> >>>>>>>> > > > > wrote: >>>>>>>> > > > > > >>>>>>>> > > > > > Hi Greg, >>>>>>>> > > > > > >>>>>>>> > > > > > As long as the inner >>>>>>>> MAC >>>>>>>> > address is >>>>>>>> > > such >>>>>>>> > > > that the >>>>>>>> > > > > packet is >>>>>>>> > > > > > trapped to the CPU, >>>>>>>> it should be >>>>>>>> > > fine for >>>>>>>> > > > use as >>>>>>>> > > > > an inner MAC is >>>>>>>> > > > > > it not? Stating that >>>>>>>> is >>>>>>>> > better than >>>>>>>> > > trying to >>>>>>>> > > > > force a management >>>>>>>> > > > > > VNI. What if someone >>>>>>>> wants >>>>>>>> > to test >>>>>>>> > > > connectivity >>>>>>>> > > > > on a specific >>>>>>>> > > > > > VNI? I would not pick >>>>>>>> a >>>>>>>> > loopback IP >>>>>>>> > > > address for >>>>>>>> > > > > this since that >>>>>>>> > > > > > address range is >>>>>>>> host/node local >>>>>>>> > > only. Is >>>>>>>> > > > there a >>>>>>>> > > > > reason you're >>>>>>>> > > > > > not using the VTEP IP >>>>>>>> as the >>>>>>>> > inner IP >>>>>>>> > > > address ? >>>>>>>> > > > > > >>>>>>>> > > > > > Dinesh >>>>>>>> > > > > > >>>>>>>> > > > > > On Wed, Jul 31, 2019 >>>>>>>> at 5:48 AM >>>>>>>> > > Greg Mirsky >>>>>>>> > > > > > < >>>>>>>> gregimirsky@gmail.com >>>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>> >>>>>>>> > > > >>>>>>> > >>>>>>> > >> >>>>>>>> > > > > >>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>> >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > >>> >>>>>>> gregimirsky@gmail.com >>>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>> >>>>>>>> > > > >>>>>>> > >>>>>>> > >> >>>>>>>> > > > > >>>>>>> > >>>>>>>> > > >>>>>>> gregimirsky@gmail.com>> >>>>>>>> > > > >>>>>>> > >>>>>>>> > > >>>>>>> > >>>>> wrote: >>>>>>>> > > > > > >>>>>>>> > > > > > Dear All, >>>>>>>> > > > > > thank you for >>>>>>>> your comments, >>>>>>>> > > > suggestions on >>>>>>>> > > > > this issue, >>>>>>>> > > > > > probably the most >>>>>>>> > challenging >>>>>>>> > > for this >>>>>>>> > > > > specification. In the >>>>>>>> > > > > > course of our >>>>>>>> discussions, >>>>>>>> > > we've agreed to >>>>>>>> > > > > abandon the >>>>>>>> > > > > > request to >>>>>>>> allocate the >>>>>>>> > > dedicated MAC >>>>>>>> > > > address >>>>>>>> > > > > to be used as >>>>>>>> > > > > > the destination >>>>>>>> MAC >>>>>>>> > address in >>>>>>>> > > the inner >>>>>>>> > > > > Ethernet frame. >>>>>>>> > > > > > Also, earlier >>>>>>>> using VNI >>>>>>>> > 0 was >>>>>>>> > > changed from >>>>>>>> > > > > mandatory to one >>>>>>>> > > > > > of the options an >>>>>>>> > > implementation may >>>>>>>> > > > offer to >>>>>>>> > > > > an operator. >>>>>>>> > > > > > The most recent >>>>>>>> > discussion was >>>>>>>> > > whether >>>>>>>> > > > VTEP's >>>>>>>> > > > > MAC address >>>>>>>> > > > > > might be used as >>>>>>>> the >>>>>>>> > > destination MAC >>>>>>>> > > > address >>>>>>>> > > > > in the inner >>>>>>>> > > > > > Ethernet frame. >>>>>>>> As I >>>>>>>> > recall it, the >>>>>>>> > > > comments >>>>>>>> > > > > from VXLAN >>>>>>>> > > > > > experts equally >>>>>>>> split >>>>>>>> > with one >>>>>>>> > > for it >>>>>>>> > > > and one >>>>>>>> > > > > against. Hence >>>>>>>> > > > > > I would like to >>>>>>>> propose >>>>>>>> > a new >>>>>>>> > > text to >>>>>>>> > > > resolve >>>>>>>> > > > > the issue. The >>>>>>>> > > > > > idea is to let an >>>>>>>> > operator select >>>>>>>> > > > Management >>>>>>>> > > > > VNI and use >>>>>>>> > > > > > that VNI in VXLAN >>>>>>>> > encapsulation >>>>>>>> > > of BFD >>>>>>>> > > > > Control packets: >>>>>>>> > > > > > NEW TEXT: >>>>>>>> > > > > > >>>>>>>> > > > > > An operator >>>>>>>> MUST >>>>>>>> > select a VNI >>>>>>>> > > > number to >>>>>>>> > > > > be used as >>>>>>>> > > > > > Management >>>>>>>> VNI. VXLAN >>>>>>>> > > packet for >>>>>>>> > > > > Management VNI MUST NOT >>>>>>>> > > > > > be sent to a >>>>>>>> tenant. VNI >>>>>>>> > > number 1 is >>>>>>>> > > > > RECOMMENDED as the >>>>>>>> > > > > > default for >>>>>>>> > Management VNI. >>>>>>>> > > > > > >>>>>>>> > > > > > With that new >>>>>>>> text, what >>>>>>>> > can be the >>>>>>>> > > > value of >>>>>>>> > > > > the destination >>>>>>>> > > > > > MAC in the inner >>>>>>>> Ethernet? I >>>>>>>> > > tend to >>>>>>>> > > > believe >>>>>>>> > > > > that it can be >>>>>>>> > > > > > anything and >>>>>>>> ignored by the >>>>>>>> > > reciever VTEP. >>>>>>>> > > > > Also, if the >>>>>>>> > > > > > trapping is based >>>>>>>> on VNI >>>>>>>> > > number, the >>>>>>>> > > > > destination IP address >>>>>>>> > > > > > of the inner IP >>>>>>>> packet >>>>>>>> > can from >>>>>>>> > > the range >>>>>>>> > > > > 127/8 for IPv4, >>>>>>>> > > > > > and for IPv6 from >>>>>>>> the range >>>>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>>>>>> > > > > > lastly, the TTL >>>>>>>> to be >>>>>>>> > set to 1 (no >>>>>>>> > > > change here). >>>>>>>> > > > > > >>>>>>>> > > > > > Much appreciate >>>>>>>> your >>>>>>>> > comments, >>>>>>>> > > > questions, and >>>>>>>> > > > > suggestions. >>>>>>>> > > > > > >>>>>>>> > > > > > Best regards, >>>>>>>> > > > > > Greg >>>>>>>> > > > > > >>>>>>>> > > > > >>>>>>>> > > > >>>>>>>> > > >>>>>>>> > >>>>>>>> >>>>>>> --0000000000003e638d058f68650e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable



On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt <didutt@gmail.com> wrote:
Hi= Greg,

That we agree on the problem definition is = the first step forward. Your original document had my cases covered and so = I was surprised by the track this thread took. It doesn't matter, we= 9;re back on track.

My recommendation is to not wo= rry about specifying the precise MAC/IP address used in the inner header. T= he addresses chosen MUST ensure that the packet is trapped to the control p= lane of the VTEP and not escape to the tenant if the BFD is to the VTEP. An= y solution MUST also not preclude the use of the BFD by tenant systems for = that VNI. There are many ways an implementer can choose to implement this. = For example, the inner MAC address is whatever the VTEP implementer would r= eturn if ARP'd for the IP address used in the inner header in the given= VNI. The implementer can pick a fixed MAC address, one that they own etc. = Multiple BFD sessions can be run for testing path connectivity on more than= one VNIs. Limits should be in place to avoid overwhelming the receiver wit= h BFD messages (you had words about this in your currently published draft)= .=C2=A0 If the VNI is irrelevant in the test i.e. only the VXLAN pipe at th= e VTEP is being tested. the user can use any VNI active on the VTEP on whic= h the VTEP owns an IP address.

I'm concerned a= bout the use of 127/8 address only because of firewalls or implementations = that drop packets with these addresses as either the source or destination.= For example, on many merchant silicon, I don't believe you can turn of= f martian checking and drops *only* for VXLAN-encapsulated BFD packets. I d= on't know what the Linux kernel does today on such packets, for example= (or Hyper-V). I'd like a solution that doesn't demand additional o= r new chip functionality or require additional middle-box hole punch.
=

Why do you feel you MUST to specify the MAC/IP address = on the inner packet? What am I missing here?

D= inesh

On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky <gregimirsky@gmail.com>= ; wrote:
Hi Dinesh,
what do you see as the way forwar= d? I agree, that the proposed text doesn't work for multi-VNI concurren= t monitoring because these VNIs are tenant's VNIs. And in that case, we= need to specify another mechanism to trap the BFD Control packet at VTEP. = It seems that VTEP's Ethernet address must be used as the destination M= AC address in the inner Ethernet frame. The destination IP address may be e= ither VTEP's address of martian (I do prefer martian). Let me give it= =C2=A0 try:
NEW TEXT:
To monit= or continuity of the path between two VTEPs, an operator MUST select a VNI = number to be used as Management VNI. Management VNI number MUST NOT be one = of the tenant's VNIs to prevent sending VXLAN packets received on Manag= ement VNI to a tenant. VNI number 1 is RECOMMENDED as the default for Manag= ement VNI. [Ed.note: What we set the Destination MAC to? Can it be invalid = MAC that MUST be ignored on receipt?]
If an implementation supports concurrent monitoring of multiple = VNIs, then the value of VNI number MAY be one of tenant's VNIs. The des= tination MAC address in the inner Ethernet frame encapsulating BFD Control = packet MUST be MAC associated with the remote VTEP.=C2=A0
The des= tination IP address of the inner IP packet MUST be selected from the range = 127/8 for IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. The = TTL value in the inner IP header MUST be set to 1.

Regards,
Greg=C2=A0

On Sun, Aug 4, 2019 at 9:07 AM Dinesh D= utt <didutt@gmail.= com> wrote:
Hi Greg,

Thanks for your = clarifications. I agree with your sentiment on why you're running BFD o= ver VXLAN between VTEPs. I wasn't arguing against it at all. All I was = saying was pointing to the limitations of the use of management VNI. I spok= e to some operators who're running EVPN and mentioned the discussion on= this thread. They concur that they're using specific VNIs to test conn= ectivity over that VNI between VTEPs to ensure misconfiguration doesn't= lead to blackholes. My statements are based in real world operator experie= nce. And I was providing language that ensured packets didn't leak acro= ss to tenants when they were destined to VTEPs.

Di= nesh

On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky <gregimirsky@gmail.com&g= t; wrote:
Hi Dinesh,
many thanks for your detailed updates on how some= implementations process VXLAN header and the inner Ethernet frame. These a= re very helpful in achieving the workable solution for the problem at hand.=
You've noted that a path between VTEPs may be monitored in t= he underlay network by merely establishing a BFD session. That is true, but= by using BFD with VXLAN encapsulation between the pair of VTEPs we are ext= ending the OAM domain by including, to some extent, VXLAN forwarding engine= . Abstract in RFC 5880 defines the goal and the domain in which BFD protoco= l can detect a fault as:
=C2=A0 =C2=A0This document describes a p= rotocol intended to detect faults in the
=C2=A0 =C2=A0bidirectional path= between two forwarding engines, including
=C2=A0 =C2=A0interfaces, data= link(s), and to the extent possible the forwarding
=C2=A0 =C2=A0engines= themselves, with potentially very low latency.=C2=A0
Thus, B= FD in the underlay will exercise a part of IP forwarding engine while BFD w= ith VXLAN encapsulation, ran between the same pair of VTEPs, extends the OA= M domain. At the same time, defining BFD between tenant systems in outside = the goal of this specification. But VXLAN BFD session between VTEPs may be = useful in monitoring e2e path between tenants, as described in the update t= o -07:
=C2=A0 =C2=A0At the same time, a service layer BFD session= may be used between the
=C2=A0 =C2=A0tenants of VTEPs IP1 and IP2 to pr= ovide end-to-end fault management.
=C2=A0 =C2=A0In such case, for VTEPs = BFD control packets of that session are
=C2=A0 =C2=A0indistinguishable f= rom data packets.=C2=A0 If end-to-end defect detection
=C2=A0 =C2=A0is r= ealized as the set of concatenated OAM domains, e.g., VM1-1 - IP1
=C2=A0= =C2=A0-- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD=
=C2=A0 =C2=A0follow the procedures described in Section 6.8.17 [RFC5880= ].
I've attached the current working version of the draft= .

Regards,
Greg


On F= ri, Aug 2, 2019 at 5:43 PM Dinesh Dutt <didutt@gmail.com> wrote:
What I mean is = "How do you infer that it excludes the case I'm talking about?&quo= t;.

Dinesh

On Fri, Aug 2, 2019 at 5:= 41 PM Dinesh Dutt <didutt@gmail.com> wrote:
The abstract reads this: "
T=
his document describes the use of the Bidirectional Forwarding
   Detection (BFD) protocol in point-to-point Virtual eXtensible Local
   Area Network (VXLAN) tunnels forming up an overlay network."
How do you infer w=
hat you said?

Dinesh

On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halp= ern <jmh@joelha= lpern.com> wrote:
I am going by what the draft says its purpose is.=C2=A0 If you (= Dinesh) want
the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft.
As currently written, the behavior Greg proposed meets the needs, and
does so in a way that is consistent with VxLAN.

Yours,
Joel

On 8/2/2019 8:30 PM, Dinesh Dutt wrote:
> What is the stated purpose of this BFD session? The VTEP reachability = is
> determined by the underlay, I don't need VXLAN-encaped packet for = that.
> Do we agree?
>
> If I want to test the VXLAN encap/decap functionality alone, picking a= ny
> single VNI maybe fine. But is this all any network operator wants? Why= ?
> In what situations has this been a problem? I suspect operators also <= br> > want to verify path continuity over a specific VNI. If you say this is=
> not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs <= br> > (see section 3). More importantly, this is a real problem that operato= rs
> like to verify.
>
> Dinesh
>
> On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jm= h@joelhalpern.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0What is special about the management VNI is precise= ly that it is NOT a
>=C2=A0 =C2=A0 =C2=A0tenant VNI.=C2=A0 The VxLAN administration does kno= w how it allocates VNI to
>=C2=A0 =C2=A0 =C2=A0tenants, and which VNI it has allocated.=C2=A0 In c= ontrast, it does not know
>=C2=A0 =C2=A0 =C2=A0which IP addresses or MAC adddresses teh tenant is = using or may plan
>=C2=A0 =C2=A0 =C2=A0to use.
>
>=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0Joel
>
>=C2=A0 =C2=A0 =C2=A0On 8/2/2019 6:41 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 > The assumption of an IP address within any VN= I is suspect that way.
>=C2=A0 =C2=A0 =C2=A0 > What's special about a single VNI, the ma= nagement VNI? The VTEP IP
>=C2=A0 =C2=A0 =C2=A0 > address does not belong in reality in any VNI= .
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halper= n
>=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>= wrote:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Your response seems to mis= s two points:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0First, the problem you des= cribe is not what the document says
>=C2=A0 =C2=A0 =C2=A0it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0solving.=C2=A0 To the degr= ee it discusses it at all, the document
>=C2=A0 =C2=A0 =C2=A0says "
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 =C2=A0In
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0most cases, a single BFD s= ession is sufficient for the given
>=C2=A0 =C2=A0 =C2=A0VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the reachability o= f a remote VTEP, regardless of the
>=C2=A0 =C2=A0 =C2=A0number of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNIs in common. "
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Second, you assume the exi= stence of an IP address for a VTEP
>=C2=A0 =C2=A0 =C2=A0within a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI.=C2=A0 As with the MAC= address, the VTEP does not have an IP
>=C2=A0 =C2=A0 =C2=A0address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0within the VNI.=C2=A0 Some= implementations may have created such a
>=C2=A0 =C2=A0 =C2=A0thing,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0but
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the general construct, as = defined to date, does not support such.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0In short, you are requirin= g a behavior that violates the
>=C2=A0 =C2=A0 =C2=A0architectural
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0structure of overlay / und= erlay separation, and common
>=C2=A0 =C2=A0 =C2=A0usage.=C2=A0 And you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0are doing so to support a = use case that the working group has not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0indicated in the document = as important.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0On 8/2/2019 5:01 PM, Dines= h Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > You understood corre= ctly.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > The VNIs may not sha= re fate due to misconfiguration. And I
>=C2=A0 =C2=A0 =C2=A0strongly
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > suspect someone will= want to use BFD for that because its
>=C2=A0 =C2=A0 =C2=A0about
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0checking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > path continuity as s= tated by the draft. As long as there's a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0valid IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > (because it's BF= D) owned by the VTEP in that VNI, you can
>=C2=A0 =C2=A0 =C2=A0use BFD in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > that VNI. Thats all = that you need to dictate.=C2=A0 That IP address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0has a MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > address and you can = use that on the inner frame. That is
>=C2=A0 =C2=A0 =C2=A0all normal
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > VXLAN processing. Th= e outer IP is always that of the VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 = at 11:03 AM Joel M. Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com= >
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com &= lt;mailto:jmh@joel= halpern.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>> w= rote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0I= f I am reading your various emails correctly Dinesh
>=C2=A0 =C2=A0 =C2=A0(and I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0may have
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0m= issed something) you are trying to use the MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0because you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= ant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= o be able to send these BFD packets over arbitrary VNI to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= NI.=C2=A0 That is not a requirement identified in the
>=C2=A0 =C2=A0 =C2=A0document.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0It is not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= ven a problem I understand, since all the VNI between an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0ingress and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= gress VTEP share fate.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Y= ours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0J= oel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0O= n 8/2/2019 1:44 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Thanks for verifying this. On Linux and hardware
>=C2=A0 =C2=A0 =C2=A0routers
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0that I'm
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ware
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > of (Cisco circa 2012 and Cumulus), the physical MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eused
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > across the VNIs on the VTEP. Did you check on a non-VMW
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0device?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0T= his is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > more for my own curiosity.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > To address the general case, can we not define a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0well-known (or
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eserve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > one) unicast MAC address for use with VTEP? If the MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > configurable in BFD command, this can be moot.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > <= santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0I have cross checked point raised about MAC address=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0usage. It is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0possible that tenant could be using physical MAC >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= hen a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packet comes with valid VNI with a MAC address
>=C2=A0 =C2=A0 =C2=A0that is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0being
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= sed by
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0tenant then packet will be sent to that tenant.
>=C2=A0 =C2=A0 =C2=A0This rules
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ut the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0fact that we could use physical MAC address as
>=C2=A0 =C2=A0 =C2=A0inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0MAC to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= nsure
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packets get terminated at VTEP itself.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 11:00 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0<santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks for your inputs.= I checked
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation within
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Vmware. Perhaps I should have been mo= re clear
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0about MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0space while checking internally. I wi= ll cross
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0check again for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the same and get back on this list. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 10:54 AM Joel= M.
>=C2=A0 =C2=A0 =C2=A0Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:jmh@joel= halpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>>&g= t; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sorry to ask a stupid q= uestion.=C2=A0 Whose
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The reason I ask is tha= t as far as I
>=C2=A0 =C2=A0 =C2=A0can tell,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0since the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tenant does not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have any control access= to the VTEP,
>=C2=A0 =C2=A0 =C2=A0there is no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eason for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have a MAC address in t= he tenant
>=C2=A0 =C2=A0 =C2=A0space.=C2=A0 Yes, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0d= evice has
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a physical
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address.=C2=A0 But = the tenant could well be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0using that MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address.=C2=A0 Yes,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they would be violating= the Ethernet spec.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0But the whole
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0point of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0segregation is not to c= are about such
>=C2=A0 =C2=A0 =C2=A0issues.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On the other hand, if y= ou tell me that
>=C2=A0 =C2=A0 =C2=A0the VMWare
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0implementation has an >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet address that i= s part of the tenant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0space, well,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they made up
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this particular game. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 7/31/2019 1:44 PM, S= antosh P K wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > I have checked wi= th implementation
>=C2=A0 =C2=A0 =C2=A0in data
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0path.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0W= hen we
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0receive a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > packet with valid= VNI then lookup
>=C2=A0 =C2=A0 =C2=A0for MAC will
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0h= appen and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it is VTEP own
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > MAC then it will = be trapped to control
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0plane for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0processing. I think we<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > can have followin= g options
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 1. Optional manag= ment VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 2. Mandatory inne= r MAC set to VTEP mac
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 3. Inner IP TTL s= et to 1 to avoid
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0forwarding of packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0via inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > address.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thoughts?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thansk
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > On Wed, Jul 31, 2= 019 at 9:20 AM Greg
>=C2=A0 =C2=A0 =C2=A0Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>&g= t;>
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>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0thank you for your consideration
>=C2=A0 =C2=A0 =C2=A0of the
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0had proposed
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>=C2=A0 =C2=A0 =C2=A0Management
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0On Wed, Jul 31, 2019 at 12:03 PM
>=C2=A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Dutt
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com> <mailto:didutt@gmail.com
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Hi Greg,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0As long as the inner MAC
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= se as
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>=C2=A0 =C2=A0 =C2=A0to test
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= onnectivity
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0on a specific
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0VNI? I would not pick a
>=C2=A0 =C2=A0 =C2=A0loopback IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this since that
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0address range is host/node local
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0only. Is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= here a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reason you're
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0not using the VTEP IP as the
>=C2=A0 =C2=A0 =C2=A0inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress ?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Greg Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>> <mailto:gregimirsky@gmail.c= om
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0s= uggestions on
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this issue,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most
>=C2=A0 =C2=A0 =C2=A0challenging
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for this
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0specification. In the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussions,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0we've agreed to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0abandon the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0dedicated MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0to be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC
>=C2=A0 =C2=A0 =C2=A0address in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI
>=C2=A0 =C2=A0 =C2=A00 was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0changed from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0mandatory to one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation may
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ffer to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an operator.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent
>=C2=A0 =C2=A0 =C2=A0discussion was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0whether
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEP's
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0destination MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0in the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I
>=C2=A0 =C2=A0 =C2=A0recall it, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= omments
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0from VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split
>=C2=A0 =C2=A0 =C2=A0with one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for it
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= nd one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0against. Hence
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose
>=C2=A0 =C2=A0 =C2=A0a new
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0text to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= esolve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the issue. The
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0idea is to let an
>=C2=A0 =C2=A0 =C2=A0operator select
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0M= anagement
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI and use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN
>=C2=A0 =C2=A0 =C2=A0encapsulation
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of BFD
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Control packets:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operator MUST
>=C2=A0 =C2=A0 =C2=A0select a VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0n= umber to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI. VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0packet for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI MUST NOT=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent to a tenant. VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number 1 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default for
>=C2=A0 =C2=A0 =C2=A0Management VNI.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, what
>=C2=A0 =C2=A0 =C2=A0can be the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0v= alue of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethernet? I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tend to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= elieve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that it can be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0reciever VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, if the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0destination IP address<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet
>=C2=A0 =C2=A0 =C2=A0can from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/1= 04. And
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be
>=C2=A0 =C2=A0 =C2=A0set to 1 (no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= hange here).
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your
>=C2=A0 =C2=A0 =C2=A0comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0q= uestions, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0suggestions.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >
>
--0000000000003e638d058f68650e-- From nobody Wed Aug 7 14:32:35 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AE7CE120439; Wed, 7 Aug 2019 09:25:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.596 X-Spam-Level: X-Spam-Status: No, score=-0.596 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_COMMENT_SAVED_URL=1.391, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_HTML_ATTACH=0.01, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7AFL2MnASdqZ; Wed, 7 Aug 2019 09:25:02 -0700 (PDT) Received: from mail-lj1-x241.google.com (mail-lj1-x241.google.com [IPv6:2a00:1450:4864:20::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B2E8912062B; Wed, 7 Aug 2019 09:25:01 -0700 (PDT) Received: by mail-lj1-x241.google.com with SMTP id v18so85994556ljh.6; Wed, 07 Aug 2019 09:25:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=A9ASOSZGmRSZkHMzsBibE1gcSJg4D+wSKl4odX5kZGQ=; b=PGu1yQsffLbNPtuWcLOAj1ovoQmhy3JS8s1dgOCRa/Rvfdl23pVIcOdsR/4m1u8PCl 7N47De/aTe39o2F8pj5yQ9DKBPisj2UnEjVvcn41l27IvZ1GmUfmGgshuQ8LmT3u+6oc MyuNY+4gn313jE9WbslSylMQNFksX5haxmtLJaC/1pKX1gsV/T/fkK7CrPsTsQ/FRWwC yRxLoCWUrkvAIrWjV+y9SfkMY/wCDHyvD87M2SrsceZcB/jVX76tQfdUIL6pWmtuz7FW QGwie0PWs7gxk+5fLK6dcptFiAhS1qnmuTYyLryhNX9Xvek+LTsN60+qO5Y6KdEe86Nj WbRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=A9ASOSZGmRSZkHMzsBibE1gcSJg4D+wSKl4odX5kZGQ=; b=M3ALondN9abSupyuT79Yr/3s3FIdXuPX4uajcfZGXBv8TYqd5DBwfmiBalIo4aOF5V IMlQvekTLmFfxbBBuv4wobnLUCyP4by3R6RarLkofa8u5SyIpEWRgTqMYu34gNbBDP+b 7oVsxKgGAqDAZ3Q+elFeykeOSvgw8xLF/m+OyyYRWt5Ze7SxydmuaglQZp7yVR7RE87q ot5p07WzU2UnED+SNFv3HnTy5HaT/6zZ/BkKqEEdpM3an38y7djNuTLJn13zX5iu6C4G 7d18IZheoUX28qIesHICX3CPV9/L3aQf3VgihQ1r6lJqdAQ0EvDxbOhiWEGaqqtKFsiF wNTA== X-Gm-Message-State: APjAAAXBBMlSmVnKtvlJ3/USsw96XSa0B4kWCIBiGfddJdHFTc1W2t/b v1TYJJVzabOpdwE9pru23xNN1sZj3nOz+x5ZbEI= X-Google-Smtp-Source: APXvYqxujfUYOS+hSTic843rfhqih34tBW+W5NlJNwFBgi8lazoy04oPSSXPMRNO3JD8j9EHLpWpGzhpdE6ZsYIBoRs= X-Received: by 2002:a2e:7614:: with SMTP id r20mr5455164ljc.42.1565195099615; Wed, 07 Aug 2019 09:24:59 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Greg Mirsky Date: Wed, 7 Aug 2019 09:24:46 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/mixed; boundary="000000000000eae810058f896119" Archived-At: X-Mailman-Approved-At: Wed, 07 Aug 2019 14:32:33 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Aug 2019 16:25:10 -0000 --000000000000eae810058f896119 Content-Type: multipart/alternative; boundary="000000000000eae80b058f896117" --000000000000eae80b058f896117 Content-Type: text/plain; charset="UTF-8" Hi Dinesh, Joel, Sridhar, et al., much appreciate the help you've given me sharing your expertise. I hope that the updates you will find in the attached diff and the working copy of the draft be closer to the acceptable solution for VTEP-VTEP BFD. Please note, that I'll shortly start a new discussion thread to address one of Carlos's questions on the ambiguity of the text on multiple concurrent sessions between the same pair of VTEPs. Please review the changes to Sections 4 and 6 and share your feedback, suggestions, and questions. Regards, Greg On Mon, Aug 5, 2019 at 6:03 PM Dinesh Dutt wrote: > > > On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky wrote: > >> Hi Dinesh, >> thank you for your expedient detailed response. >> I believe that the ability to run BFD session up to a tenant >> (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this >> specification. >> I'm trying to provide precise specification on what can be used ad the >> destination MAC and IP addresses in the inner frame/packet as I believe >> that likely will help to avoid interoperability issues. >> I'm interested to learn some more about the "martian checking" function. >> As you know, martian addresses have been used as destination IP address in >> LSP Ping and BFD over MPLS LSP and PW. I haven't heard that any silicon >> feature caused problems for operators using these tools. >> > > Interesting. I didn't know this aspect of use with MPLS ping. Did those > packets ever go through a firewall though? In any case, maybe suggest the > use of those addresses with a statement that this is how LSP does it, but > that other MAC/IP pairs are possible as long as the conditions of the > endpoint owning the MAC/IP was honored. > > Dinesh > >> >> Regards, >> Greg >> >> On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt wrote: >> >>> Hi Greg, >>> >>> That we agree on the problem definition is the first step forward. Your >>> original document had my cases covered and so I was surprised by the track >>> this thread took. It doesn't matter, we're back on track. >>> >>> My recommendation is to not worry about specifying the precise MAC/IP >>> address used in the inner header. The addresses chosen MUST ensure that the >>> packet is trapped to the control plane of the VTEP and not escape to the >>> tenant if the BFD is to the VTEP. Any solution MUST also not preclude the >>> use of the BFD by tenant systems for that VNI. There are many ways an >>> implementer can choose to implement this. For example, the inner MAC >>> address is whatever the VTEP implementer would return if ARP'd for the IP >>> address used in the inner header in the given VNI. The implementer can pick >>> a fixed MAC address, one that they own etc. Multiple BFD sessions can be >>> run for testing path connectivity on more than one VNIs. Limits should be >>> in place to avoid overwhelming the receiver with BFD messages (you had >>> words about this in your currently published draft). If the VNI is >>> irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being >>> tested. the user can use any VNI active on the VTEP on which the VTEP owns >>> an IP address. >>> >>> I'm concerned about the use of 127/8 address only because of firewalls >>> or implementations that drop packets with these addresses as either the >>> source or destination. For example, on many merchant silicon, I don't >>> believe you can turn off martian checking and drops *only* for >>> VXLAN-encapsulated BFD packets. I don't know what the Linux kernel does >>> today on such packets, for example (or Hyper-V). I'd like a solution that >>> doesn't demand additional or new chip functionality or require additional >>> middle-box hole punch. >>> >>> Why do you feel you MUST to specify the MAC/IP address on the inner >>> packet? What am I missing here? >>> >>> Dinesh >>> >>> On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky >>> wrote: >>> >>>> Hi Dinesh, >>>> what do you see as the way forward? I agree, that the proposed text >>>> doesn't work for multi-VNI concurrent monitoring because these VNIs are >>>> tenant's VNIs. And in that case, we need to specify another mechanism to >>>> trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address >>>> must be used as the destination MAC address in the inner Ethernet frame. >>>> The destination IP address may be either VTEP's address of martian (I do >>>> prefer martian). Let me give it try: >>>> NEW TEXT: >>>> >>>> To monitor continuity of the path between two VTEPs, an operator MUST >>>> select a VNI number to be used as Management VNI. Management VNI number >>>> MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets >>>> received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the >>>> default for Management VNI. [Ed.note: What we set the Destination MAC to? >>>> Can it be invalid MAC that MUST be ignored on receipt?] >>>> >>>> If an implementation supports concurrent monitoring of multiple VNIs, >>>> then the value of VNI number MAY be one of tenant's VNIs. The destination >>>> MAC address in the inner Ethernet frame encapsulating BFD Control packet >>>> MUST be MAC associated with the remote VTEP. >>>> The destination IP address of the inner IP packet MUST be selected from >>>> the range 127/8 for IPv4, and for IPv6 from the range >>>> 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set >>>> to 1. >>>> >>>> Regards, >>>> Greg >>>> >>>> On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: >>>> >>>>> Hi Greg, >>>>> >>>>> Thanks for your clarifications. I agree with your sentiment on why >>>>> you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at >>>>> all. All I was saying was pointing to the limitations of the use of >>>>> management VNI. I spoke to some operators who're running EVPN and mentioned >>>>> the discussion on this thread. They concur that they're using specific VNIs >>>>> to test connectivity over that VNI between VTEPs to ensure misconfiguration >>>>> doesn't lead to blackholes. My statements are based in real world operator >>>>> experience. And I was providing language that ensured packets didn't leak >>>>> across to tenants when they were destined to VTEPs. >>>>> >>>>> Dinesh >>>>> >>>>> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >>>>> wrote: >>>>> >>>>>> Hi Dinesh, >>>>>> many thanks for your detailed updates on how some implementations >>>>>> process VXLAN header and the inner Ethernet frame. These are very helpful >>>>>> in achieving the workable solution for the problem at hand. >>>>>> You've noted that a path between VTEPs may be monitored in the >>>>>> underlay network by merely establishing a BFD session. That is true, but by >>>>>> using BFD with VXLAN encapsulation between the pair of VTEPs we are >>>>>> extending the OAM domain by including, to some extent, VXLAN forwarding >>>>>> engine. Abstract in RFC 5880 defines the goal and the domain in which BFD >>>>>> protocol can detect a fault as: >>>>>> This document describes a protocol intended to detect faults in the >>>>>> bidirectional path between two forwarding engines, including >>>>>> interfaces, data link(s), and to the extent possible the forwarding >>>>>> engines themselves, with potentially very low latency. >>>>>> Thus, BFD in the underlay will exercise a part of IP forwarding >>>>>> engine while BFD with VXLAN encapsulation, ran between the same pair of >>>>>> VTEPs, extends the OAM domain. At the same time, defining BFD between >>>>>> tenant systems in outside the goal of this specification. But VXLAN BFD >>>>>> session between VTEPs may be useful in monitoring e2e path between tenants, >>>>>> as described in the update to -07: >>>>>> At the same time, a service layer BFD session may be used between >>>>>> the >>>>>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault >>>>>> management. >>>>>> In such case, for VTEPs BFD control packets of that session are >>>>>> indistinguishable from data packets. If end-to-end defect >>>>>> detection >>>>>> is realized as the set of concatenated OAM domains, e.g., VM1-1 - >>>>>> IP1 >>>>>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs >>>>>> SHOULD >>>>>> follow the procedures described in Section 6.8.17 [RFC5880]. >>>>>> I've attached the current working version of the draft. >>>>>> >>>>>> Regards, >>>>>> Greg >>>>>> >>>>>> >>>>>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: >>>>>> >>>>>>> What I mean is "How do you infer that it excludes the case I'm >>>>>>> talking about?". >>>>>>> >>>>>>> Dinesh >>>>>>> >>>>>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt wrote: >>>>>>> >>>>>>>> The abstract reads this: " >>>>>>>> >>>>>>>> This document describes the use of the Bidirectional Forwarding >>>>>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>>>>> >>>>>>>> How do you infer what you said? >>>>>>>> >>>>>>>> Dinesh >>>>>>>> >>>>>>>> >>>>>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern >>>>>>>> wrote: >>>>>>>> >>>>>>>>> I am going by what the draft says its purpose is. If you (Dinesh) >>>>>>>>> want >>>>>>>>> the draft to fulfill a different purpose, then either ask the >>>>>>>>> chairs to >>>>>>>>> take this draft back to the WG, or write a separate draft. >>>>>>>>> As currently written, the behavior Greg proposed meets the needs, >>>>>>>>> and >>>>>>>>> does so in a way that is consistent with VxLAN. >>>>>>>>> >>>>>>>>> Yours, >>>>>>>>> Joel >>>>>>>>> >>>>>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>>>>> reachability is >>>>>>>>> > determined by the underlay, I don't need VXLAN-encaped packet >>>>>>>>> for that. >>>>>>>>> > Do we agree? >>>>>>>>> > >>>>>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>>>>> picking any >>>>>>>>> > single VNI maybe fine. But is this all any network operator >>>>>>>>> wants? Why? >>>>>>>>> > In what situations has this been a problem? I suspect operators >>>>>>>>> also >>>>>>>>> > want to verify path continuity over a specific VNI. If you say >>>>>>>>> this is >>>>>>>>> > not defined by the document, I disagree because the current >>>>>>>>> version >>>>>>>>> > talks about controlling the number of BFD sessions between the >>>>>>>>> VTEPs >>>>>>>>> > (see section 3). More importantly, this is a real problem that >>>>>>>>> operators >>>>>>>>> > like to verify. >>>>>>>>> > >>>>>>>>> > Dinesh >>>>>>>>> > >>>>>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern < >>>>>>>>> jmh@joelhalpern.com >>>>>>>>> > > wrote: >>>>>>>>> > >>>>>>>>> > What is special about the management VNI is precisely that >>>>>>>>> it is NOT a >>>>>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>>>>> allocates VNI to >>>>>>>>> > tenants, and which VNI it has allocated. In contrast, it >>>>>>>>> does not know >>>>>>>>> > which IP addresses or MAC adddresses teh tenant is using or >>>>>>>>> may plan >>>>>>>>> > to use. >>>>>>>>> > >>>>>>>>> > Yours, >>>>>>>>> > Joel >>>>>>>>> > >>>>>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>>>>> > > The assumption of an IP address within any VNI is suspect >>>>>>>>> that way. >>>>>>>>> > > What's special about a single VNI, the management VNI? >>>>>>>>> The VTEP IP >>>>>>>>> > > address does not belong in reality in any VNI. >>>>>>>>> > > >>>>>>>>> > > Dinesh >>>>>>>>> > > >>>>>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>>>>> > >>>>>>>>> > > >> >>>>>>>>> wrote: >>>>>>>>> > > >>>>>>>>> > > Your response seems to miss two points: >>>>>>>>> > > >>>>>>>>> > > First, the problem you describe is not what the >>>>>>>>> document says >>>>>>>>> > it is >>>>>>>>> > > solving. To the degree it discusses it at all, the >>>>>>>>> document >>>>>>>>> > says " >>>>>>>>> > > In >>>>>>>>> > > most cases, a single BFD session is sufficient for >>>>>>>>> the given >>>>>>>>> > VTEP to >>>>>>>>> > > monitor the reachability of a remote VTEP, regardless >>>>>>>>> of the >>>>>>>>> > number of >>>>>>>>> > > VNIs in common. " >>>>>>>>> > > >>>>>>>>> > > Second, you assume the existence of an IP address for >>>>>>>>> a VTEP >>>>>>>>> > within a >>>>>>>>> > > VNI. As with the MAC address, the VTEP does not have >>>>>>>>> an IP >>>>>>>>> > address >>>>>>>>> > > within the VNI. Some implementations may have >>>>>>>>> created such a >>>>>>>>> > thing, >>>>>>>>> > > but >>>>>>>>> > > the general construct, as defined to date, does not >>>>>>>>> support such. >>>>>>>>> > > >>>>>>>>> > > In short, you are requiring a behavior that violates >>>>>>>>> the >>>>>>>>> > architectural >>>>>>>>> > > structure of overlay / underlay separation, and common >>>>>>>>> > usage. And you >>>>>>>>> > > are doing so to support a use case that the working >>>>>>>>> group has not >>>>>>>>> > > indicated in the document as important. >>>>>>>>> > > >>>>>>>>> > > Yours, >>>>>>>>> > > Joel >>>>>>>>> > > >>>>>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>>>>> > > > Joel, >>>>>>>>> > > > >>>>>>>>> > > > You understood correctly. >>>>>>>>> > > > >>>>>>>>> > > > The VNIs may not share fate due to >>>>>>>>> misconfiguration. And I >>>>>>>>> > strongly >>>>>>>>> > > > suspect someone will want to use BFD for that >>>>>>>>> because its >>>>>>>>> > about >>>>>>>>> > > checking >>>>>>>>> > > > path continuity as stated by the draft. As long as >>>>>>>>> there's a >>>>>>>>> > > valid IP >>>>>>>>> > > > (because it's BFD) owned by the VTEP in that VNI, >>>>>>>>> you can >>>>>>>>> > use BFD in >>>>>>>>> > > > that VNI. Thats all that you need to dictate. >>>>>>>>> That IP address >>>>>>>>> > > has a MAC >>>>>>>>> > > > address and you can use that on the inner frame. >>>>>>>>> That is >>>>>>>>> > all normal >>>>>>>>> > > > VXLAN processing. The outer IP is always that of >>>>>>>>> the VTEP. >>>>>>>>> > > > >>>>>>>>> > > > Dinesh >>>>>>>>> > > > >>>>>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>>>>> > > >>>>>>>>> > > >>>>>>>>> > > > >>>>>>>> jmh@joelhalpern.com> >>>>>>>>> > >>> >>>>>>>>> wrote: >>>>>>>>> > > > >>>>>>>>> > > > If I am reading your various emails correctly >>>>>>>>> Dinesh >>>>>>>>> > (and I >>>>>>>>> > > may have >>>>>>>>> > > > missed something) you are trying to use the >>>>>>>>> MAC address >>>>>>>>> > > because you >>>>>>>>> > > > want >>>>>>>>> > > > to be able to send these BFD packets over >>>>>>>>> arbitrary VNI to >>>>>>>>> > > monitor the >>>>>>>>> > > > VNI. That is not a requirement identified in >>>>>>>>> the >>>>>>>>> > document. >>>>>>>>> > > It is not >>>>>>>>> > > > even a problem I understand, since all the VNI >>>>>>>>> between an >>>>>>>>> > > ingress and >>>>>>>>> > > > egress VTEP share fate. >>>>>>>>> > > > >>>>>>>>> > > > Yours, >>>>>>>>> > > > Joel >>>>>>>>> > > > >>>>>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>>>>> > > > > Thanks for verifying this. On Linux and >>>>>>>>> hardware >>>>>>>>> > routers >>>>>>>>> > > that I'm >>>>>>>>> > > > aware >>>>>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>>>>> physical MAC >>>>>>>>> > address is >>>>>>>>> > > > reused >>>>>>>>> > > > > across the VNIs on the VTEP. Did you check >>>>>>>>> on a non-VMW >>>>>>>>> > > device? >>>>>>>>> > > > This is >>>>>>>>> > > > > more for my own curiosity. >>>>>>>>> > > > > >>>>>>>>> > > > > To address the general case, can we not >>>>>>>>> define a >>>>>>>>> > > well-known (or >>>>>>>>> > > > reserve >>>>>>>>> > > > > one) unicast MAC address for use with VTEP? >>>>>>>>> If the MAC >>>>>>>>> > > address is >>>>>>>>> > > > > configurable in BFD command, this can be >>>>>>>>> moot. >>>>>>>>> > > > > >>>>>>>>> > > > > Dinesh >>>>>>>>> > > > > >>>>>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>>>>>>>> > > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > > >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > >> >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > > >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > >>>> wrote: >>>>>>>>> > > > > >>>>>>>>> > > > > I have cross checked point raised about >>>>>>>>> MAC address >>>>>>>>> > > usage. It is >>>>>>>>> > > > > possible that tenant could be using >>>>>>>>> physical MAC >>>>>>>>> > > address and >>>>>>>>> > > > when a >>>>>>>>> > > > > packet comes with valid VNI with a MAC >>>>>>>>> address >>>>>>>>> > that is >>>>>>>>> > > being >>>>>>>>> > > > used by >>>>>>>>> > > > > tenant then packet will be sent to that >>>>>>>>> tenant. >>>>>>>>> > This rules >>>>>>>>> > > > out the >>>>>>>>> > > > > fact that we could use physical MAC >>>>>>>>> address as >>>>>>>>> > inner >>>>>>>>> > > MAC to >>>>>>>>> > > > ensure >>>>>>>>> > > > > packets get terminated at VTEP itself. >>>>>>>>> > > > > >>>>>>>>> > > > > Thanks >>>>>>>>> > > > > Santosh P K >>>>>>>>> > > > > >>>>>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM >>>>>>>>> Santosh P K >>>>>>>>> > > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > > >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > >> >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > > >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > >>>> >>>>>>>>> > > > > wrote: >>>>>>>>> > > > > >>>>>>>>> > > > > Joel, >>>>>>>>> > > > > Thanks for your inputs. I >>>>>>>>> checked >>>>>>>>> > > implementation within >>>>>>>>> > > > > Vmware. Perhaps I should have been >>>>>>>>> more clear >>>>>>>>> > > about MAC >>>>>>>>> > > > address >>>>>>>>> > > > > space while checking internally. I >>>>>>>>> will cross >>>>>>>>> > > check again for >>>>>>>>> > > > > the same and get back on this list. >>>>>>>>> > > > > >>>>>>>>> > > > > Thanks >>>>>>>>> > > > > Santosh P K >>>>>>>>> > > > > >>>>>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM >>>>>>>>> Joel M. >>>>>>>>> > Halpern >>>>>>>>> > > > > >>>>>>>> > >>>>>>>> > > >>>>>>>>> > > >>>>>>>> jmh@joelhalpern.com> >>>>>>>>> > >> >>>>>>>>> > > > >>>>>>>> > >>>>>>>> > > >>>>>>>>> > > >>>>>>>> jmh@joelhalpern.com> >>>>>>>>> > >>>> >>>>>>>>> wrote: >>>>>>>>> > > > > >>>>>>>>> > > > > Sorry to ask a stupid >>>>>>>>> question. Whose >>>>>>>>> > > implementation? >>>>>>>>> > > > > >>>>>>>>> > > > > The reason I ask is that as far >>>>>>>>> as I >>>>>>>>> > can tell, >>>>>>>>> > > since the >>>>>>>>> > > > > tenant does not >>>>>>>>> > > > > have any control access to the >>>>>>>>> VTEP, >>>>>>>>> > there is no >>>>>>>>> > > > reason for >>>>>>>>> > > > > the VTEP to >>>>>>>>> > > > > have a MAC address in the tenant >>>>>>>>> > space. Yes, the >>>>>>>>> > > > device has >>>>>>>>> > > > > a physical >>>>>>>>> > > > > MAC address. But the tenant >>>>>>>>> could well be >>>>>>>>> > > using that MAC >>>>>>>>> > > > > address. Yes, >>>>>>>>> > > > > they would be violating the >>>>>>>>> Ethernet spec. >>>>>>>>> > > But the whole >>>>>>>>> > > > > point of >>>>>>>>> > > > > segregation is not to care >>>>>>>>> about such >>>>>>>>> > issues. >>>>>>>>> > > > > >>>>>>>>> > > > > On the other hand, if you tell >>>>>>>>> me that >>>>>>>>> > the VMWare >>>>>>>>> > > > > implementation has an >>>>>>>>> > > > > Ethernet address that is part >>>>>>>>> of the tenant >>>>>>>>> > > space, well, >>>>>>>>> > > > > they made up >>>>>>>>> > > > > this particular game. >>>>>>>>> > > > > >>>>>>>>> > > > > Yours, >>>>>>>>> > > > > Joel >>>>>>>>> > > > > >>>>>>>>> > > > > On 7/31/2019 1:44 PM, Santosh P >>>>>>>>> K wrote: >>>>>>>>> > > > > > I have checked with >>>>>>>>> implementation >>>>>>>>> > in data >>>>>>>>> > > path. >>>>>>>>> > > > When we >>>>>>>>> > > > > receive a >>>>>>>>> > > > > > packet with valid VNI then >>>>>>>>> lookup >>>>>>>>> > for MAC will >>>>>>>>> > > > happen and >>>>>>>>> > > > > it is VTEP own >>>>>>>>> > > > > > MAC then it will be trapped >>>>>>>>> to control >>>>>>>>> > > plane for >>>>>>>>> > > > > processing. I think we >>>>>>>>> > > > > > can have following options >>>>>>>>> > > > > > 1. Optional managment VNI >>>>>>>>> > > > > > 2. Mandatory inner MAC set >>>>>>>>> to VTEP mac >>>>>>>>> > > > > > 3. Inner IP TTL set to 1 to >>>>>>>>> avoid >>>>>>>>> > > forwarding of packet >>>>>>>>> > > > > via inner IP >>>>>>>>> > > > > > address. >>>>>>>>> > > > > > >>>>>>>>> > > > > > >>>>>>>>> > > > > > Thoughts? >>>>>>>>> > > > > > >>>>>>>>> > > > > > Thansk >>>>>>>>> > > > > > Santosh P K >>>>>>>>> > > > > > >>>>>>>>> > > > > > On Wed, Jul 31, 2019 at 9:20 >>>>>>>>> AM Greg >>>>>>>>> > Mirsky >>>>>>>>> > > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>> >>>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>>> >>>>>>>>> > > > >>>>>>>> > >>>>>>>> > > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com> >>>>>>>>> > >>>>>>>> >>>> >>>>>>>>> > > > > > >>>>>>>> gregimirsky@gmail.com >>>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>> >>>>>>>>> > > > >>>>>>>> > >>>>>>>> > >> >>>>>>>>> > > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>> >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > >>>>> wrote: >>>>>>>>> > > > > > >>>>>>>>> > > > > > Hi Dinesh, >>>>>>>>> > > > > > thank you for your >>>>>>>>> consideration >>>>>>>>> > of the >>>>>>>>> > > > proposal and >>>>>>>>> > > > > questions. What >>>>>>>>> > > > > > would you see as the >>>>>>>>> scope of >>>>>>>>> > testing the >>>>>>>>> > > > > connectivity for the >>>>>>>>> > > > > > specific VNI? If it is >>>>>>>>> > > tenant-to-tenant, then >>>>>>>>> > > > VTEPs >>>>>>>>> > > > > will treat these >>>>>>>>> > > > > > packets as regular user >>>>>>>>> frames. More >>>>>>>>> > > likely, these >>>>>>>>> > > > > could be Layer 2 >>>>>>>>> > > > > > OAM, e.g. CCM frames. >>>>>>>>> The reason >>>>>>>>> > to use >>>>>>>>> > > 127/8 for >>>>>>>>> > > > > IPv4, and >>>>>>>>> > > > > > >>>>>>>>> 0:0:0:0:0:FFFF:7F00:0/104 for >>>>>>>>> > IPv6 is >>>>>>>>> > > to safeguard >>>>>>>>> > > > > from leaking >>>>>>>>> > > > > > Ethernet frames with BFD >>>>>>>>> Control >>>>>>>>> > packet >>>>>>>>> > > to a >>>>>>>>> > > > tenant. >>>>>>>>> > > > > > You've suggested using a >>>>>>>>> MAC >>>>>>>>> > address to >>>>>>>>> > > trap the >>>>>>>>> > > > > control packet at >>>>>>>>> > > > > > VTEP. What that address >>>>>>>>> could be? We >>>>>>>>> > > had proposed >>>>>>>>> > > > > using the >>>>>>>>> > > > > > dedicated MAC and VTEP's >>>>>>>>> MAC and >>>>>>>>> > both >>>>>>>>> > > raised >>>>>>>>> > > > concerns >>>>>>>>> > > > > among VXLAN >>>>>>>>> > > > > > experts. The idea of >>>>>>>>> using >>>>>>>>> > Management >>>>>>>>> > > VNI may >>>>>>>>> > > > be more >>>>>>>>> > > > > acceptable >>>>>>>>> > > > > > based on its similarity >>>>>>>>> to the >>>>>>>>> > practice >>>>>>>>> > > of using >>>>>>>>> > > > > Management VLAN. >>>>>>>>> > > > > > >>>>>>>>> > > > > > Regards, >>>>>>>>> > > > > > Greg >>>>>>>>> > > > > > >>>>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>>>> 12:03 PM >>>>>>>>> > Dinesh >>>>>>>>> > > Dutt >>>>>>>>> > > > > >>>>>>>> > >>>>>>>> > > >>>>>>>>> > > >>>>>>>>> > >> >>>>>>>>> > > > >>>>>>>> didutt@gmail.com> >>>>>>>>> > > >>>>>>>>> > > >>>>>>>>> > >>> >>>>>>>>> > > > > > >>>>>>>> > >>>>>>>>> > > > >>>>>>>>> > > > >>>>>>>> didutt@gmail.com> >>>>>>>>> > >> >>>>>>>>> > > >>>>>>>>> > > >>>>>>>>> > > > >>>>>>>> didutt@gmail.com> >>>>>>>>> > >>>>> >>>>>>>>> > > > > wrote: >>>>>>>>> > > > > > >>>>>>>>> > > > > > Hi Greg, >>>>>>>>> > > > > > >>>>>>>>> > > > > > As long as the inner >>>>>>>>> MAC >>>>>>>>> > address is >>>>>>>>> > > such >>>>>>>>> > > > that the >>>>>>>>> > > > > packet is >>>>>>>>> > > > > > trapped to the CPU, >>>>>>>>> it should be >>>>>>>>> > > fine for >>>>>>>>> > > > use as >>>>>>>>> > > > > an inner MAC is >>>>>>>>> > > > > > it not? Stating that >>>>>>>>> is >>>>>>>>> > better than >>>>>>>>> > > trying to >>>>>>>>> > > > > force a management >>>>>>>>> > > > > > VNI. What if someone >>>>>>>>> wants >>>>>>>>> > to test >>>>>>>>> > > > connectivity >>>>>>>>> > > > > on a specific >>>>>>>>> > > > > > VNI? I would not >>>>>>>>> pick a >>>>>>>>> > loopback IP >>>>>>>>> > > > address for >>>>>>>>> > > > > this since that >>>>>>>>> > > > > > address range is >>>>>>>>> host/node local >>>>>>>>> > > only. Is >>>>>>>>> > > > there a >>>>>>>>> > > > > reason you're >>>>>>>>> > > > > > not using the VTEP >>>>>>>>> IP as the >>>>>>>>> > inner IP >>>>>>>>> > > > address ? >>>>>>>>> > > > > > >>>>>>>>> > > > > > Dinesh >>>>>>>>> > > > > > >>>>>>>>> > > > > > On Wed, Jul 31, 2019 >>>>>>>>> at 5:48 AM >>>>>>>>> > > Greg Mirsky >>>>>>>>> > > > > > < >>>>>>>>> gregimirsky@gmail.com >>>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>> >>>>>>>>> > > > >>>>>>>> > >>>>>>>> > >> >>>>>>>>> > > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>> >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > >>> >>>>>>>> gregimirsky@gmail.com >>>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>> >>>>>>>>> > > > >>>>>>>> > >>>>>>>> > >> >>>>>>>>> > > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> gregimirsky@gmail.com>> >>>>>>>>> > > > >>>>>>>> > >>>>>>>>> > > >>>>>>>> > >>>>> wrote: >>>>>>>>> > > > > > >>>>>>>>> > > > > > Dear All, >>>>>>>>> > > > > > thank you for >>>>>>>>> your comments, >>>>>>>>> > > > suggestions on >>>>>>>>> > > > > this issue, >>>>>>>>> > > > > > probably the most >>>>>>>>> > challenging >>>>>>>>> > > for this >>>>>>>>> > > > > specification. In the >>>>>>>>> > > > > > course of our >>>>>>>>> discussions, >>>>>>>>> > > we've agreed to >>>>>>>>> > > > > abandon the >>>>>>>>> > > > > > request to >>>>>>>>> allocate the >>>>>>>>> > > dedicated MAC >>>>>>>>> > > > address >>>>>>>>> > > > > to be used as >>>>>>>>> > > > > > the destination >>>>>>>>> MAC >>>>>>>>> > address in >>>>>>>>> > > the inner >>>>>>>>> > > > > Ethernet frame. >>>>>>>>> > > > > > Also, earlier >>>>>>>>> using VNI >>>>>>>>> > 0 was >>>>>>>>> > > changed from >>>>>>>>> > > > > mandatory to one >>>>>>>>> > > > > > of the options an >>>>>>>>> > > implementation may >>>>>>>>> > > > offer to >>>>>>>>> > > > > an operator. >>>>>>>>> > > > > > The most recent >>>>>>>>> > discussion was >>>>>>>>> > > whether >>>>>>>>> > > > VTEP's >>>>>>>>> > > > > MAC address >>>>>>>>> > > > > > might be used as >>>>>>>>> the >>>>>>>>> > > destination MAC >>>>>>>>> > > > address >>>>>>>>> > > > > in the inner >>>>>>>>> > > > > > Ethernet frame. >>>>>>>>> As I >>>>>>>>> > recall it, the >>>>>>>>> > > > comments >>>>>>>>> > > > > from VXLAN >>>>>>>>> > > > > > experts equally >>>>>>>>> split >>>>>>>>> > with one >>>>>>>>> > > for it >>>>>>>>> > > > and one >>>>>>>>> > > > > against. Hence >>>>>>>>> > > > > > I would like to >>>>>>>>> propose >>>>>>>>> > a new >>>>>>>>> > > text to >>>>>>>>> > > > resolve >>>>>>>>> > > > > the issue. The >>>>>>>>> > > > > > idea is to let an >>>>>>>>> > operator select >>>>>>>>> > > > Management >>>>>>>>> > > > > VNI and use >>>>>>>>> > > > > > that VNI in VXLAN >>>>>>>>> > encapsulation >>>>>>>>> > > of BFD >>>>>>>>> > > > > Control packets: >>>>>>>>> > > > > > NEW TEXT: >>>>>>>>> > > > > > >>>>>>>>> > > > > > An operator >>>>>>>>> MUST >>>>>>>>> > select a VNI >>>>>>>>> > > > number to >>>>>>>>> > > > > be used as >>>>>>>>> > > > > > Management >>>>>>>>> VNI. VXLAN >>>>>>>>> > > packet for >>>>>>>>> > > > > Management VNI MUST NOT >>>>>>>>> > > > > > be sent to a >>>>>>>>> tenant. VNI >>>>>>>>> > > number 1 is >>>>>>>>> > > > > RECOMMENDED as the >>>>>>>>> > > > > > default for >>>>>>>>> > Management VNI. >>>>>>>>> > > > > > >>>>>>>>> > > > > > With that new >>>>>>>>> text, what >>>>>>>>> > can be the >>>>>>>>> > > > value of >>>>>>>>> > > > > the destination >>>>>>>>> > > > > > MAC in the inner >>>>>>>>> Ethernet? I >>>>>>>>> > > tend to >>>>>>>>> > > > believe >>>>>>>>> > > > > that it can be >>>>>>>>> > > > > > anything and >>>>>>>>> ignored by the >>>>>>>>> > > reciever VTEP. >>>>>>>>> > > > > Also, if the >>>>>>>>> > > > > > trapping is >>>>>>>>> based on VNI >>>>>>>>> > > number, the >>>>>>>>> > > > > destination IP address >>>>>>>>> > > > > > of the inner IP >>>>>>>>> packet >>>>>>>>> > can from >>>>>>>>> > > the range >>>>>>>>> > > > > 127/8 for IPv4, >>>>>>>>> > > > > > and for IPv6 >>>>>>>>> from the range >>>>>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>>>>>>> > > > > > lastly, the TTL >>>>>>>>> to be >>>>>>>>> > set to 1 (no >>>>>>>>> > > > change here). >>>>>>>>> > > > > > >>>>>>>>> > > > > > Much appreciate >>>>>>>>> your >>>>>>>>> > comments, >>>>>>>>> > > > questions, and >>>>>>>>> > > > > suggestions. >>>>>>>>> > > > > > >>>>>>>>> > > > > > Best regards, >>>>>>>>> > > > > > Greg >>>>>>>>> > > > > > >>>>>>>>> > > > > >>>>>>>>> > > > >>>>>>>>> > > >>>>>>>>> > >>>>>>>>> >>>>>>>> --000000000000eae80b058f896117 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Dinesh, Joel, Sridhar, et al.,
much appreciate the = help you've=C2=A0given me sharing your expertise. I hope that the updat= es you will find in the attached diff and the working copy of the draft be = closer to the acceptable solution for VTEP-VTEP BFD. Please note, that I= 9;ll shortly start a new discussion thread to address one of Carlos's q= uestions on the ambiguity of the text on multiple concurrent sessions betwe= en the same pair of VTEPs.
Please review the changes to Sections = 4 and 6 and share your feedback, suggestions, and questions.

=
Regards,
Greg

On Mon, Aug 5, 2019 at 6:03 PM Dine= sh Dutt <didutt@gmail.com> wr= ote:


On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky <<= a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail= .com> wrote:
Hi Dinesh,
thank you for your expedient detailed r= esponse.
I believe that the ability to run BFD session up to a te= nant (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this sp= ecification.
I'm trying to provide precise specification on w= hat can be used ad the destination MAC and IP addresses in the inner frame/= packet as I believe that likely will help to avoid interoperability issues.=
I'm interested to learn some more about the "martian ch= ecking" function. As you know, martian addresses have been used as des= tination IP address in LSP Ping and BFD over MPLS LSP and PW. I haven't= heard that any silicon feature caused problems for operators using these t= ools.

Interesting. I didn't= know this aspect of use with MPLS ping. Did those packets ever go through = a firewall though? In any case, maybe suggest the use of those addresses wi= th a statement that this is how LSP does it, but that other MAC/IP pairs ar= e possible as long as the conditions of the endpoint owning the MAC/IP was = honored.

Dinesh

Regards,
Greg

On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt <didutt@gmail.com> wrote:
=
Hi Greg,

That we agree on the problem definit= ion is the first step forward. Your original document had my cases covered = and so I was surprised by the track this thread took. It doesn't matter= , we're back on track.

My recommendation is to= not worry about specifying the precise MAC/IP address used in the inner he= ader. The addresses chosen MUST ensure that the packet is trapped to the co= ntrol plane of the VTEP and not escape to the tenant if the BFD is to the V= TEP. Any solution MUST also not preclude the use of the BFD by tenant syste= ms for that VNI. There are many ways an implementer can choose to implement= this. For example, the inner MAC address is whatever the VTEP implementer = would return if ARP'd for the IP address used in the inner header in th= e given VNI. The implementer can pick a fixed MAC address, one that they ow= n etc. Multiple BFD sessions can be run for testing path connectivity on mo= re than one VNIs. Limits should be in place to avoid overwhelming the recei= ver with BFD messages (you had words about this in your currently published= draft).=C2=A0 If the VNI is irrelevant in the test i.e. only the VXLAN pip= e at the VTEP is being tested. the user can use any VNI active on the VTEP = on which the VTEP owns an IP address.

I'm conc= erned about the use of 127/8 address only because of firewalls or implement= ations that drop packets with these addresses as either the source or desti= nation. For example, on many merchant silicon, I don't believe you can = turn off martian checking and drops *only* for VXLAN-encapsulated BFD packe= ts. I don't know what the Linux kernel does today on such packets, for = example (or Hyper-V). I'd like a solution that doesn't demand addit= ional or new chip functionality or require additional middle-box hole punch= .

Why do you feel you MUST to specify the MAC/IP a= ddress on the inner packet? What am I missing here?

Dinesh

On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky <gregimirsky@gmail.com<= /a>> wrote:
<= div dir=3D"ltr">
Hi Dinesh,
what do you see as the way = forward? I agree, that the proposed text doesn't work for multi-VNI con= current monitoring because these VNIs are tenant's VNIs. And in that ca= se, we need to specify another mechanism to trap the BFD Control packet at = VTEP. It seems that VTEP's Ethernet address must be used as the destina= tion MAC address in the inner Ethernet frame. The destination IP address ma= y be either VTEP's address of martian (I do prefer martian). Let me giv= e it=C2=A0 try:
NEW TEXT:
To m= onitor continuity of the path between two VTEPs, an operator MUST select a = VNI number to be used as Management VNI. Management VNI number MUST NOT be = one of the tenant's VNIs to prevent sending VXLAN packets received on M= anagement VNI to a tenant. VNI number 1 is RECOMMENDED as the default for M= anagement VNI. [Ed.note: What we set the Destination MAC to? Can it be inva= lid MAC that MUST be ignored on receipt?]
If an implementation supports concurrent monitoring of multi= ple VNIs, then the value of VNI number MAY be one of tenant's VNIs. The= destination MAC address in the inner Ethernet frame encapsulating BFD Cont= rol packet MUST be MAC associated with the remote VTEP.=C2=A0
The= destination IP address of the inner IP packet MUST be selected from the ra= nge 127/8 for IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. = The TTL value in the inner IP header MUST be set to 1.

=
Regards,
Greg=C2=A0

On Sun, Aug 4, 2019 at 9:07 AM Dine= sh Dutt <didutt@gm= ail.com> wrote:
Hi Greg,

Thanks for y= our clarifications. I agree with your sentiment on why you're running B= FD over VXLAN between VTEPs. I wasn't arguing against it at all. All I = was saying was pointing to the limitations of the use of management VNI. I = spoke to some operators who're running EVPN and mentioned the discussio= n on this thread. They concur that they're using specific VNIs to test = connectivity over that VNI between VTEPs to ensure misconfiguration doesn&#= 39;t lead to blackholes. My statements are based in real world operator exp= erience. And I was providing language that ensured packets didn't leak = across to tenants when they were destined to VTEPs.

Dinesh

On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh,
many thanks for your detailed updates on how = some implementations process VXLAN header and the inner Ethernet frame. The= se are very helpful in achieving the workable solution for the problem at h= and.
You've noted that a path between VTEPs may be monitored = in the underlay network by merely establishing a BFD session. That is true,= but by using BFD with VXLAN encapsulation between the pair of VTEPs we are= extending the OAM domain by including, to some extent, VXLAN forwarding en= gine. Abstract in RFC 5880 defines the goal and the domain in which BFD pro= tocol can detect a fault as:
=C2=A0 =C2=A0This document describes= a protocol intended to detect faults in the
=C2=A0 =C2=A0bidirectional = path between two forwarding engines, including
=C2=A0 =C2=A0interfaces, = data link(s), and to the extent possible the forwarding
=C2=A0 =C2=A0eng= ines themselves, with potentially very low latency.=C2=A0
Thu= s, BFD in the underlay will exercise a part of IP forwarding engine while B= FD with VXLAN encapsulation, ran between the same pair of VTEPs, extends th= e OAM domain. At the same time, defining BFD between tenant systems in outs= ide the goal of this specification. But VXLAN BFD session between VTEPs may= be useful in monitoring e2e path between tenants, as described in the upda= te to -07:
=C2=A0 =C2=A0At the same time, a service layer BFD ses= sion may be used between the
=C2=A0 =C2=A0tenants of VTEPs IP1 and IP2 t= o provide end-to-end fault management.
=C2=A0 =C2=A0In such case, for VT= EPs BFD control packets of that session are
=C2=A0 =C2=A0indistinguishab= le from data packets.=C2=A0 If end-to-end defect detection
=C2=A0 =C2=A0= is realized as the set of concatenated OAM domains, e.g., VM1-1 - IP1
= =C2=A0 =C2=A0-- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs = SHOULD
=C2=A0 =C2=A0follow the procedures described in Section 6.8.17 [R= FC5880].
I've attached the current working version of the= draft.

Regards,
Greg


On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt <didutt@gmail.com> wrote:
What I me= an is "How do you infer that it excludes the case I'm talking abou= t?".

Dinesh

On Fri, Aug 2, 2019= at 5:41 PM Dinesh Dutt <didutt@gmail.com> wrote:
The abstract reads this: "
= 
This document describes the use of the Bidirectional Forwarding
   Detection (BFD) protocol in point-to-point Virtual eXtensible Local
   Area Network (VXLAN) tunnels forming up an overlay network."
How do you infer w=
hat you said?

Dinesh

On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halp= ern <jmh@joelha= lpern.com> wrote:
I am going by what the draft says its purpose is.=C2=A0 If you (= Dinesh) want
the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft.
As currently written, the behavior Greg proposed meets the needs, and
does so in a way that is consistent with VxLAN.

Yours,
Joel

On 8/2/2019 8:30 PM, Dinesh Dutt wrote:
> What is the stated purpose of this BFD session? The VTEP reachability = is
> determined by the underlay, I don't need VXLAN-encaped packet for = that.
> Do we agree?
>
> If I want to test the VXLAN encap/decap functionality alone, picking a= ny
> single VNI maybe fine. But is this all any network operator wants? Why= ?
> In what situations has this been a problem? I suspect operators also <= br> > want to verify path continuity over a specific VNI. If you say this is=
> not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs <= br> > (see section 3). More importantly, this is a real problem that operato= rs
> like to verify.
>
> Dinesh
>
> On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jm= h@joelhalpern.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0What is special about the management VNI is precise= ly that it is NOT a
>=C2=A0 =C2=A0 =C2=A0tenant VNI.=C2=A0 The VxLAN administration does kno= w how it allocates VNI to
>=C2=A0 =C2=A0 =C2=A0tenants, and which VNI it has allocated.=C2=A0 In c= ontrast, it does not know
>=C2=A0 =C2=A0 =C2=A0which IP addresses or MAC adddresses teh tenant is = using or may plan
>=C2=A0 =C2=A0 =C2=A0to use.
>
>=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0Joel
>
>=C2=A0 =C2=A0 =C2=A0On 8/2/2019 6:41 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 > The assumption of an IP address within any VN= I is suspect that way.
>=C2=A0 =C2=A0 =C2=A0 > What's special about a single VNI, the ma= nagement VNI? The VTEP IP
>=C2=A0 =C2=A0 =C2=A0 > address does not belong in reality in any VNI= .
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halper= n
>=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>= wrote:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Your response seems to mis= s two points:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0First, the problem you des= cribe is not what the document says
>=C2=A0 =C2=A0 =C2=A0it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0solving.=C2=A0 To the degr= ee it discusses it at all, the document
>=C2=A0 =C2=A0 =C2=A0says "
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 =C2=A0In
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0most cases, a single BFD s= ession is sufficient for the given
>=C2=A0 =C2=A0 =C2=A0VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the reachability o= f a remote VTEP, regardless of the
>=C2=A0 =C2=A0 =C2=A0number of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNIs in common. "
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Second, you assume the exi= stence of an IP address for a VTEP
>=C2=A0 =C2=A0 =C2=A0within a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI.=C2=A0 As with the MAC= address, the VTEP does not have an IP
>=C2=A0 =C2=A0 =C2=A0address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0within the VNI.=C2=A0 Some= implementations may have created such a
>=C2=A0 =C2=A0 =C2=A0thing,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0but
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the general construct, as = defined to date, does not support such.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0In short, you are requirin= g a behavior that violates the
>=C2=A0 =C2=A0 =C2=A0architectural
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0structure of overlay / und= erlay separation, and common
>=C2=A0 =C2=A0 =C2=A0usage.=C2=A0 And you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0are doing so to support a = use case that the working group has not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0indicated in the document = as important.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0On 8/2/2019 5:01 PM, Dines= h Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > You understood corre= ctly.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > The VNIs may not sha= re fate due to misconfiguration. And I
>=C2=A0 =C2=A0 =C2=A0strongly
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > suspect someone will= want to use BFD for that because its
>=C2=A0 =C2=A0 =C2=A0about
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0checking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > path continuity as s= tated by the draft. As long as there's a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0valid IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > (because it's BF= D) owned by the VTEP in that VNI, you can
>=C2=A0 =C2=A0 =C2=A0use BFD in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > that VNI. Thats all = that you need to dictate.=C2=A0 That IP address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0has a MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > address and you can = use that on the inner frame. That is
>=C2=A0 =C2=A0 =C2=A0all normal
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > VXLAN processing. Th= e outer IP is always that of the VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 = at 11:03 AM Joel M. Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com= >
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com &= lt;mailto:jmh@joel= halpern.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>> w= rote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0I= f I am reading your various emails correctly Dinesh
>=C2=A0 =C2=A0 =C2=A0(and I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0may have
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0m= issed something) you are trying to use the MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0because you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= ant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= o be able to send these BFD packets over arbitrary VNI to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= NI.=C2=A0 That is not a requirement identified in the
>=C2=A0 =C2=A0 =C2=A0document.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0It is not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= ven a problem I understand, since all the VNI between an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0ingress and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= gress VTEP share fate.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Y= ours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0J= oel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0O= n 8/2/2019 1:44 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Thanks for verifying this. On Linux and hardware
>=C2=A0 =C2=A0 =C2=A0routers
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0that I'm
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ware
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > of (Cisco circa 2012 and Cumulus), the physical MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eused
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > across the VNIs on the VTEP. Did you check on a non-VMW
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0device?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0T= his is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > more for my own curiosity.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > To address the general case, can we not define a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0well-known (or
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eserve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > one) unicast MAC address for use with VTEP? If the MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > configurable in BFD command, this can be moot.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > <= santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0I have cross checked point raised about MAC address=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0usage. It is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0possible that tenant could be using physical MAC >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= hen a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packet comes with valid VNI with a MAC address
>=C2=A0 =C2=A0 =C2=A0that is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0being
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= sed by
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0tenant then packet will be sent to that tenant.
>=C2=A0 =C2=A0 =C2=A0This rules
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ut the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0fact that we could use physical MAC address as
>=C2=A0 =C2=A0 =C2=A0inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0MAC to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= nsure
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packets get terminated at VTEP itself.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 11:00 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0<santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks for your inputs.= I checked
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation within
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Vmware. Perhaps I should have been mo= re clear
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0about MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0space while checking internally. I wi= ll cross
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0check again for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the same and get back on this list. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 10:54 AM Joel= M.
>=C2=A0 =C2=A0 =C2=A0Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:jmh@joel= halpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>>&g= t; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sorry to ask a stupid q= uestion.=C2=A0 Whose
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The reason I ask is tha= t as far as I
>=C2=A0 =C2=A0 =C2=A0can tell,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0since the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tenant does not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have any control access= to the VTEP,
>=C2=A0 =C2=A0 =C2=A0there is no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eason for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have a MAC address in t= he tenant
>=C2=A0 =C2=A0 =C2=A0space.=C2=A0 Yes, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0d= evice has
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a physical
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address.=C2=A0 But = the tenant could well be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0using that MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address.=C2=A0 Yes,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they would be violating= the Ethernet spec.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0But the whole
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0point of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0segregation is not to c= are about such
>=C2=A0 =C2=A0 =C2=A0issues.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On the other hand, if y= ou tell me that
>=C2=A0 =C2=A0 =C2=A0the VMWare
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0implementation has an >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet address that i= s part of the tenant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0space, well,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they made up
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this particular game. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 7/31/2019 1:44 PM, S= antosh P K wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > I have checked wi= th implementation
>=C2=A0 =C2=A0 =C2=A0in data
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0path.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0W= hen we
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0receive a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > packet with valid= VNI then lookup
>=C2=A0 =C2=A0 =C2=A0for MAC will
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0h= appen and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it is VTEP own
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > MAC then it will = be trapped to control
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0plane for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0processing. I think we<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > can have followin= g options
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 1. Optional manag= ment VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 2. Mandatory inne= r MAC set to VTEP mac
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 3. Inner IP TTL s= et to 1 to avoid
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0forwarding of packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0via inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > address.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thoughts?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thansk
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > On Wed, Jul 31, 2= 019 at 9:20 AM Greg
>=C2=A0 =C2=A0 =C2=A0Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>&g= t;>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > <mailto:gregimirsky@gmail.com<= /a>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0thank you for your consideration
>=C2=A0 =C2=A0 =C2=A0of the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0p= roposal and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0questions. What
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0would you see as the scope of
>=C2=A0 =C2=A0 =C2=A0testing the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0connectivity for the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0specific VNI? If it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tenant-to-tenant, then
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEPs
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0will treat these
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0packets as regular user frames. More
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0likely, these
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0could be Layer 2
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0OAM, e.g. CCM frames. The reason
>=C2=A0 =C2=A0 =C2=A0to use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0127/8 for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0IPv4, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A00:0:0:0:0:FFFF:7F00:0/104 for
>=C2=A0 =C2=A0 =C2=A0IPv6 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0to safeguard
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0from leaking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Ethernet frames with BFD Control
>=C2=A0 =C2=A0 =C2=A0packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0to a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= enant.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0You've suggested using a MAC
>=C2=A0 =C2=A0 =C2=A0address to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trap the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0control packet at
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0VTEP. What that address could be? We
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0had proposed
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0using the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0dedicated MAC and VTEP's MAC and
>=C2=A0 =C2=A0 =C2=A0both
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0raised
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= oncerns
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0among VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0experts. The idea of using
>=C2=A0 =C2=A0 =C2=A0Management
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI may
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= e more
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0acceptable
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0based on its similarity to the
>=C2=A0 =C2=A0 =C2=A0practice
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of using
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VLAN.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0On Wed, Jul 31, 2019 at 12:03 PM
>=C2=A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Dutt
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com> <mailto:didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com><= br> >=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com><= br> >=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>>>
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>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>>>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Hi Greg,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0As long as the inner MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0such
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= hat the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0packet is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0trapped to the CPU, it should be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0fine for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= se as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an inner MAC is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0it not? Stating that is
>=C2=A0 =C2=A0 =C2=A0better than
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trying to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0force a management
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0VNI. What if someone wants
>=C2=A0 =C2=A0 =C2=A0to test
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= onnectivity
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0on a specific
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0VNI? I would not pick a
>=C2=A0 =C2=A0 =C2=A0loopback IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this since that
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0address range is host/node local
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0only. Is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= here a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reason you're
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0not using the VTEP IP as the
>=C2=A0 =C2=A0 =C2=A0inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress ?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Greg Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>> <mailto:gregimirsky@gmail.c= om
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0s= uggestions on
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this issue,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most
>=C2=A0 =C2=A0 =C2=A0challenging
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for this
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0specification. In the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussions,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0we've agreed to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0abandon the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0dedicated MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0to be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC
>=C2=A0 =C2=A0 =C2=A0address in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI
>=C2=A0 =C2=A0 =C2=A00 was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0changed from
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation may
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an operator.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent
>=C2=A0 =C2=A0 =C2=A0discussion was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0whether
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEP's
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0destination MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0in the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I
>=C2=A0 =C2=A0 =C2=A0recall it, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= omments
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0from VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split
>=C2=A0 =C2=A0 =C2=A0with one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for it
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= nd one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0against. Hence
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose
>=C2=A0 =C2=A0 =C2=A0a new
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0text to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= esolve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the issue. The
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0idea is to let an
>=C2=A0 =C2=A0 =C2=A0operator select
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0M= anagement
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI and use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN
>=C2=A0 =C2=A0 =C2=A0encapsulation
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of BFD
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Control packets:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operator MUST
>=C2=A0 =C2=A0 =C2=A0select a VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0n= umber to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI. VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0packet for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI MUST NOT=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent to a tenant. VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number 1 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default for
>=C2=A0 =C2=A0 =C2=A0Management VNI.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, what
>=C2=A0 =C2=A0 =C2=A0can be the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0v= alue of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethernet? I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tend to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= elieve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that it can be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0reciever VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, if the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0destination IP address<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet
>=C2=A0 =C2=A0 =C2=A0can from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/1= 04. And
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be
>=C2=A0 =C2=A0 =C2=A0set to 1 (no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= hange here).
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your
>=C2=A0 =C2=A0 =C2=A0comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0q= uestions, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0suggestions.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >
>
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<7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Dinesh Dutt Date: Wed, 7 Aug 2019 14:25:24 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Greg Mirsky Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000100f99058f8d9595" Archived-At: X-Mailman-Approved-At: Wed, 07 Aug 2019 14:32:34 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Aug 2019 21:25:46 -0000 --000000000000100f99058f8d9595 Content-Type: text/plain; charset="UTF-8" Looks god to me Greg. Thank you for your hard work in this, Dinesh On Wed, Aug 7, 2019 at 9:25 AM Greg Mirsky wrote: > Hi Dinesh, Joel, Sridhar, et al., > much appreciate the help you've given me sharing your expertise. I hope > that the updates you will find in the attached diff and the working copy of > the draft be closer to the acceptable solution for VTEP-VTEP BFD. Please > note, that I'll shortly start a new discussion thread to address one of > Carlos's questions on the ambiguity of the text on multiple concurrent > sessions between the same pair of VTEPs. > Please review the changes to Sections 4 and 6 and share your feedback, > suggestions, and questions. > > Regards, > Greg > > On Mon, Aug 5, 2019 at 6:03 PM Dinesh Dutt wrote: > >> >> >> On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky wrote: >> >>> Hi Dinesh, >>> thank you for your expedient detailed response. >>> I believe that the ability to run BFD session up to a tenant >>> (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this >>> specification. >>> I'm trying to provide precise specification on what can be used ad the >>> destination MAC and IP addresses in the inner frame/packet as I believe >>> that likely will help to avoid interoperability issues. >>> I'm interested to learn some more about the "martian checking" function. >>> As you know, martian addresses have been used as destination IP address in >>> LSP Ping and BFD over MPLS LSP and PW. I haven't heard that any silicon >>> feature caused problems for operators using these tools. >>> >> >> Interesting. I didn't know this aspect of use with MPLS ping. Did those >> packets ever go through a firewall though? In any case, maybe suggest the >> use of those addresses with a statement that this is how LSP does it, but >> that other MAC/IP pairs are possible as long as the conditions of the >> endpoint owning the MAC/IP was honored. >> >> Dinesh >> >>> >>> Regards, >>> Greg >>> >>> On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt wrote: >>> >>>> Hi Greg, >>>> >>>> That we agree on the problem definition is the first step forward. Your >>>> original document had my cases covered and so I was surprised by the track >>>> this thread took. It doesn't matter, we're back on track. >>>> >>>> My recommendation is to not worry about specifying the precise MAC/IP >>>> address used in the inner header. The addresses chosen MUST ensure that the >>>> packet is trapped to the control plane of the VTEP and not escape to the >>>> tenant if the BFD is to the VTEP. Any solution MUST also not preclude the >>>> use of the BFD by tenant systems for that VNI. There are many ways an >>>> implementer can choose to implement this. For example, the inner MAC >>>> address is whatever the VTEP implementer would return if ARP'd for the IP >>>> address used in the inner header in the given VNI. The implementer can pick >>>> a fixed MAC address, one that they own etc. Multiple BFD sessions can be >>>> run for testing path connectivity on more than one VNIs. Limits should be >>>> in place to avoid overwhelming the receiver with BFD messages (you had >>>> words about this in your currently published draft). If the VNI is >>>> irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being >>>> tested. the user can use any VNI active on the VTEP on which the VTEP owns >>>> an IP address. >>>> >>>> I'm concerned about the use of 127/8 address only because of firewalls >>>> or implementations that drop packets with these addresses as either the >>>> source or destination. For example, on many merchant silicon, I don't >>>> believe you can turn off martian checking and drops *only* for >>>> VXLAN-encapsulated BFD packets. I don't know what the Linux kernel does >>>> today on such packets, for example (or Hyper-V). I'd like a solution that >>>> doesn't demand additional or new chip functionality or require additional >>>> middle-box hole punch. >>>> >>>> Why do you feel you MUST to specify the MAC/IP address on the inner >>>> packet? What am I missing here? >>>> >>>> Dinesh >>>> >>>> On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky >>>> wrote: >>>> >>>>> Hi Dinesh, >>>>> what do you see as the way forward? I agree, that the proposed text >>>>> doesn't work for multi-VNI concurrent monitoring because these VNIs are >>>>> tenant's VNIs. And in that case, we need to specify another mechanism to >>>>> trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address >>>>> must be used as the destination MAC address in the inner Ethernet frame. >>>>> The destination IP address may be either VTEP's address of martian (I do >>>>> prefer martian). Let me give it try: >>>>> NEW TEXT: >>>>> >>>>> To monitor continuity of the path between two VTEPs, an operator MUST >>>>> select a VNI number to be used as Management VNI. Management VNI number >>>>> MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets >>>>> received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the >>>>> default for Management VNI. [Ed.note: What we set the Destination MAC to? >>>>> Can it be invalid MAC that MUST be ignored on receipt?] >>>>> >>>>> If an implementation supports concurrent monitoring of multiple VNIs, >>>>> then the value of VNI number MAY be one of tenant's VNIs. The destination >>>>> MAC address in the inner Ethernet frame encapsulating BFD Control packet >>>>> MUST be MAC associated with the remote VTEP. >>>>> The destination IP address of the inner IP packet MUST be selected >>>>> from the range 127/8 for IPv4, and for IPv6 from the range >>>>> 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set >>>>> to 1. >>>>> >>>>> Regards, >>>>> Greg >>>>> >>>>> On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: >>>>> >>>>>> Hi Greg, >>>>>> >>>>>> Thanks for your clarifications. I agree with your sentiment on why >>>>>> you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at >>>>>> all. All I was saying was pointing to the limitations of the use of >>>>>> management VNI. I spoke to some operators who're running EVPN and mentioned >>>>>> the discussion on this thread. They concur that they're using specific VNIs >>>>>> to test connectivity over that VNI between VTEPs to ensure misconfiguration >>>>>> doesn't lead to blackholes. My statements are based in real world operator >>>>>> experience. And I was providing language that ensured packets didn't leak >>>>>> across to tenants when they were destined to VTEPs. >>>>>> >>>>>> Dinesh >>>>>> >>>>>> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >>>>>> wrote: >>>>>> >>>>>>> Hi Dinesh, >>>>>>> many thanks for your detailed updates on how some implementations >>>>>>> process VXLAN header and the inner Ethernet frame. These are very helpful >>>>>>> in achieving the workable solution for the problem at hand. >>>>>>> You've noted that a path between VTEPs may be monitored in the >>>>>>> underlay network by merely establishing a BFD session. That is true, but by >>>>>>> using BFD with VXLAN encapsulation between the pair of VTEPs we are >>>>>>> extending the OAM domain by including, to some extent, VXLAN forwarding >>>>>>> engine. Abstract in RFC 5880 defines the goal and the domain in which BFD >>>>>>> protocol can detect a fault as: >>>>>>> This document describes a protocol intended to detect faults in >>>>>>> the >>>>>>> bidirectional path between two forwarding engines, including >>>>>>> interfaces, data link(s), and to the extent possible the >>>>>>> forwarding >>>>>>> engines themselves, with potentially very low latency. >>>>>>> Thus, BFD in the underlay will exercise a part of IP forwarding >>>>>>> engine while BFD with VXLAN encapsulation, ran between the same pair of >>>>>>> VTEPs, extends the OAM domain. At the same time, defining BFD between >>>>>>> tenant systems in outside the goal of this specification. But VXLAN BFD >>>>>>> session between VTEPs may be useful in monitoring e2e path between tenants, >>>>>>> as described in the update to -07: >>>>>>> At the same time, a service layer BFD session may be used between >>>>>>> the >>>>>>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault >>>>>>> management. >>>>>>> In such case, for VTEPs BFD control packets of that session are >>>>>>> indistinguishable from data packets. If end-to-end defect >>>>>>> detection >>>>>>> is realized as the set of concatenated OAM domains, e.g., VM1-1 - >>>>>>> IP1 >>>>>>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs >>>>>>> SHOULD >>>>>>> follow the procedures described in Section 6.8.17 [RFC5880]. >>>>>>> I've attached the current working version of the draft. >>>>>>> >>>>>>> Regards, >>>>>>> Greg >>>>>>> >>>>>>> >>>>>>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt wrote: >>>>>>> >>>>>>>> What I mean is "How do you infer that it excludes the case I'm >>>>>>>> talking about?". >>>>>>>> >>>>>>>> Dinesh >>>>>>>> >>>>>>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt >>>>>>>> wrote: >>>>>>>> >>>>>>>>> The abstract reads this: " >>>>>>>>> >>>>>>>>> This document describes the use of the Bidirectional Forwarding >>>>>>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>>>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>>>>>> >>>>>>>>> How do you infer what you said? >>>>>>>>> >>>>>>>>> Dinesh >>>>>>>>> >>>>>>>>> >>>>>>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern < >>>>>>>>> jmh@joelhalpern.com> wrote: >>>>>>>>> >>>>>>>>>> I am going by what the draft says its purpose is. If you >>>>>>>>>> (Dinesh) want >>>>>>>>>> the draft to fulfill a different purpose, then either ask the >>>>>>>>>> chairs to >>>>>>>>>> take this draft back to the WG, or write a separate draft. >>>>>>>>>> As currently written, the behavior Greg proposed meets the needs, >>>>>>>>>> and >>>>>>>>>> does so in a way that is consistent with VxLAN. >>>>>>>>>> >>>>>>>>>> Yours, >>>>>>>>>> Joel >>>>>>>>>> >>>>>>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>>>>>> reachability is >>>>>>>>>> > determined by the underlay, I don't need VXLAN-encaped packet >>>>>>>>>> for that. >>>>>>>>>> > Do we agree? >>>>>>>>>> > >>>>>>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>>>>>> picking any >>>>>>>>>> > single VNI maybe fine. But is this all any network operator >>>>>>>>>> wants? Why? >>>>>>>>>> > In what situations has this been a problem? I suspect operators >>>>>>>>>> also >>>>>>>>>> > want to verify path continuity over a specific VNI. If you say >>>>>>>>>> this is >>>>>>>>>> > not defined by the document, I disagree because the current >>>>>>>>>> version >>>>>>>>>> > talks about controlling the number of BFD sessions between the >>>>>>>>>> VTEPs >>>>>>>>>> > (see section 3). More importantly, this is a real problem that >>>>>>>>>> operators >>>>>>>>>> > like to verify. >>>>>>>>>> > >>>>>>>>>> > Dinesh >>>>>>>>>> > >>>>>>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern < >>>>>>>>>> jmh@joelhalpern.com >>>>>>>>>> > > wrote: >>>>>>>>>> > >>>>>>>>>> > What is special about the management VNI is precisely that >>>>>>>>>> it is NOT a >>>>>>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>>>>>> allocates VNI to >>>>>>>>>> > tenants, and which VNI it has allocated. In contrast, it >>>>>>>>>> does not know >>>>>>>>>> > which IP addresses or MAC adddresses teh tenant is using or >>>>>>>>>> may plan >>>>>>>>>> > to use. >>>>>>>>>> > >>>>>>>>>> > Yours, >>>>>>>>>> > Joel >>>>>>>>>> > >>>>>>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>>>>>> > > The assumption of an IP address within any VNI is >>>>>>>>>> suspect that way. >>>>>>>>>> > > What's special about a single VNI, the management VNI? >>>>>>>>>> The VTEP IP >>>>>>>>>> > > address does not belong in reality in any VNI. >>>>>>>>>> > > >>>>>>>>>> > > Dinesh >>>>>>>>>> > > >>>>>>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>>>>>> > >>>>>>>>>> > > >> >>>>>>>>>> wrote: >>>>>>>>>> > > >>>>>>>>>> > > Your response seems to miss two points: >>>>>>>>>> > > >>>>>>>>>> > > First, the problem you describe is not what the >>>>>>>>>> document says >>>>>>>>>> > it is >>>>>>>>>> > > solving. To the degree it discusses it at all, the >>>>>>>>>> document >>>>>>>>>> > says " >>>>>>>>>> > > In >>>>>>>>>> > > most cases, a single BFD session is sufficient for >>>>>>>>>> the given >>>>>>>>>> > VTEP to >>>>>>>>>> > > monitor the reachability of a remote VTEP, >>>>>>>>>> regardless of the >>>>>>>>>> > number of >>>>>>>>>> > > VNIs in common. " >>>>>>>>>> > > >>>>>>>>>> > > Second, you assume the existence of an IP address >>>>>>>>>> for a VTEP >>>>>>>>>> > within a >>>>>>>>>> > > VNI. As with the MAC address, the VTEP does not >>>>>>>>>> have an IP >>>>>>>>>> > address >>>>>>>>>> > > within the VNI. Some implementations may have >>>>>>>>>> created such a >>>>>>>>>> > thing, >>>>>>>>>> > > but >>>>>>>>>> > > the general construct, as defined to date, does not >>>>>>>>>> support such. >>>>>>>>>> > > >>>>>>>>>> > > In short, you are requiring a behavior that violates >>>>>>>>>> the >>>>>>>>>> > architectural >>>>>>>>>> > > structure of overlay / underlay separation, and >>>>>>>>>> common >>>>>>>>>> > usage. And you >>>>>>>>>> > > are doing so to support a use case that the working >>>>>>>>>> group has not >>>>>>>>>> > > indicated in the document as important. >>>>>>>>>> > > >>>>>>>>>> > > Yours, >>>>>>>>>> > > Joel >>>>>>>>>> > > >>>>>>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>>>>>> > > > Joel, >>>>>>>>>> > > > >>>>>>>>>> > > > You understood correctly. >>>>>>>>>> > > > >>>>>>>>>> > > > The VNIs may not share fate due to >>>>>>>>>> misconfiguration. And I >>>>>>>>>> > strongly >>>>>>>>>> > > > suspect someone will want to use BFD for that >>>>>>>>>> because its >>>>>>>>>> > about >>>>>>>>>> > > checking >>>>>>>>>> > > > path continuity as stated by the draft. As long >>>>>>>>>> as there's a >>>>>>>>>> > > valid IP >>>>>>>>>> > > > (because it's BFD) owned by the VTEP in that VNI, >>>>>>>>>> you can >>>>>>>>>> > use BFD in >>>>>>>>>> > > > that VNI. Thats all that you need to dictate. >>>>>>>>>> That IP address >>>>>>>>>> > > has a MAC >>>>>>>>>> > > > address and you can use that on the inner frame. >>>>>>>>>> That is >>>>>>>>>> > all normal >>>>>>>>>> > > > VXLAN processing. The outer IP is always that of >>>>>>>>>> the VTEP. >>>>>>>>>> > > > >>>>>>>>>> > > > Dinesh >>>>>>>>>> > > > >>>>>>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>> > > > >>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>> > >>> >>>>>>>>>> wrote: >>>>>>>>>> > > > >>>>>>>>>> > > > If I am reading your various emails correctly >>>>>>>>>> Dinesh >>>>>>>>>> > (and I >>>>>>>>>> > > may have >>>>>>>>>> > > > missed something) you are trying to use the >>>>>>>>>> MAC address >>>>>>>>>> > > because you >>>>>>>>>> > > > want >>>>>>>>>> > > > to be able to send these BFD packets over >>>>>>>>>> arbitrary VNI to >>>>>>>>>> > > monitor the >>>>>>>>>> > > > VNI. That is not a requirement identified in >>>>>>>>>> the >>>>>>>>>> > document. >>>>>>>>>> > > It is not >>>>>>>>>> > > > even a problem I understand, since all the >>>>>>>>>> VNI between an >>>>>>>>>> > > ingress and >>>>>>>>>> > > > egress VTEP share fate. >>>>>>>>>> > > > >>>>>>>>>> > > > Yours, >>>>>>>>>> > > > Joel >>>>>>>>>> > > > >>>>>>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>>>>>> > > > > Thanks for verifying this. On Linux and >>>>>>>>>> hardware >>>>>>>>>> > routers >>>>>>>>>> > > that I'm >>>>>>>>>> > > > aware >>>>>>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>>>>>> physical MAC >>>>>>>>>> > address is >>>>>>>>>> > > > reused >>>>>>>>>> > > > > across the VNIs on the VTEP. Did you check >>>>>>>>>> on a non-VMW >>>>>>>>>> > > device? >>>>>>>>>> > > > This is >>>>>>>>>> > > > > more for my own curiosity. >>>>>>>>>> > > > > >>>>>>>>>> > > > > To address the general case, can we not >>>>>>>>>> define a >>>>>>>>>> > > well-known (or >>>>>>>>>> > > > reserve >>>>>>>>>> > > > > one) unicast MAC address for use with >>>>>>>>>> VTEP? If the MAC >>>>>>>>>> > > address is >>>>>>>>>> > > > > configurable in BFD command, this can be >>>>>>>>>> moot. >>>>>>>>>> > > > > >>>>>>>>>> > > > > Dinesh >>>>>>>>>> > > > > >>>>>>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > > >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > >> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > > >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > >>>> wrote: >>>>>>>>>> > > > > >>>>>>>>>> > > > > I have cross checked point raised >>>>>>>>>> about MAC address >>>>>>>>>> > > usage. It is >>>>>>>>>> > > > > possible that tenant could be using >>>>>>>>>> physical MAC >>>>>>>>>> > > address and >>>>>>>>>> > > > when a >>>>>>>>>> > > > > packet comes with valid VNI with a MAC >>>>>>>>>> address >>>>>>>>>> > that is >>>>>>>>>> > > being >>>>>>>>>> > > > used by >>>>>>>>>> > > > > tenant then packet will be sent to >>>>>>>>>> that tenant. >>>>>>>>>> > This rules >>>>>>>>>> > > > out the >>>>>>>>>> > > > > fact that we could use physical MAC >>>>>>>>>> address as >>>>>>>>>> > inner >>>>>>>>>> > > MAC to >>>>>>>>>> > > > ensure >>>>>>>>>> > > > > packets get terminated at VTEP itself. >>>>>>>>>> > > > > >>>>>>>>>> > > > > Thanks >>>>>>>>>> > > > > Santosh P K >>>>>>>>>> > > > > >>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM >>>>>>>>>> Santosh P K >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > > >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > >> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > > >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > >>>> >>>>>>>>>> > > > > wrote: >>>>>>>>>> > > > > >>>>>>>>>> > > > > Joel, >>>>>>>>>> > > > > Thanks for your inputs. I >>>>>>>>>> checked >>>>>>>>>> > > implementation within >>>>>>>>>> > > > > Vmware. Perhaps I should have been >>>>>>>>>> more clear >>>>>>>>>> > > about MAC >>>>>>>>>> > > > address >>>>>>>>>> > > > > space while checking internally. I >>>>>>>>>> will cross >>>>>>>>>> > > check again for >>>>>>>>>> > > > > the same and get back on this list. >>>>>>>>>> > > > > >>>>>>>>>> > > > > Thanks >>>>>>>>>> > > > > Santosh P K >>>>>>>>>> > > > > >>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM >>>>>>>>>> Joel M. >>>>>>>>>> > Halpern >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>> > >> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>> > >>>> >>>>>>>>>> wrote: >>>>>>>>>> > > > > >>>>>>>>>> > > > > Sorry to ask a stupid >>>>>>>>>> question. Whose >>>>>>>>>> > > implementation? >>>>>>>>>> > > > > >>>>>>>>>> > > > > The reason I ask is that as >>>>>>>>>> far as I >>>>>>>>>> > can tell, >>>>>>>>>> > > since the >>>>>>>>>> > > > > tenant does not >>>>>>>>>> > > > > have any control access to the >>>>>>>>>> VTEP, >>>>>>>>>> > there is no >>>>>>>>>> > > > reason for >>>>>>>>>> > > > > the VTEP to >>>>>>>>>> > > > > have a MAC address in the >>>>>>>>>> tenant >>>>>>>>>> > space. Yes, the >>>>>>>>>> > > > device has >>>>>>>>>> > > > > a physical >>>>>>>>>> > > > > MAC address. But the tenant >>>>>>>>>> could well be >>>>>>>>>> > > using that MAC >>>>>>>>>> > > > > address. Yes, >>>>>>>>>> > > > > they would be violating the >>>>>>>>>> Ethernet spec. >>>>>>>>>> > > But the whole >>>>>>>>>> > > > > point of >>>>>>>>>> > > > > segregation is not to care >>>>>>>>>> about such >>>>>>>>>> > issues. >>>>>>>>>> > > > > >>>>>>>>>> > > > > On the other hand, if you tell >>>>>>>>>> me that >>>>>>>>>> > the VMWare >>>>>>>>>> > > > > implementation has an >>>>>>>>>> > > > > Ethernet address that is part >>>>>>>>>> of the tenant >>>>>>>>>> > > space, well, >>>>>>>>>> > > > > they made up >>>>>>>>>> > > > > this particular game. >>>>>>>>>> > > > > >>>>>>>>>> > > > > Yours, >>>>>>>>>> > > > > Joel >>>>>>>>>> > > > > >>>>>>>>>> > > > > On 7/31/2019 1:44 PM, Santosh >>>>>>>>>> P K wrote: >>>>>>>>>> > > > > > I have checked with >>>>>>>>>> implementation >>>>>>>>>> > in data >>>>>>>>>> > > path. >>>>>>>>>> > > > When we >>>>>>>>>> > > > > receive a >>>>>>>>>> > > > > > packet with valid VNI then >>>>>>>>>> lookup >>>>>>>>>> > for MAC will >>>>>>>>>> > > > happen and >>>>>>>>>> > > > > it is VTEP own >>>>>>>>>> > > > > > MAC then it will be trapped >>>>>>>>>> to control >>>>>>>>>> > > plane for >>>>>>>>>> > > > > processing. I think we >>>>>>>>>> > > > > > can have following options >>>>>>>>>> > > > > > 1. Optional managment VNI >>>>>>>>>> > > > > > 2. Mandatory inner MAC set >>>>>>>>>> to VTEP mac >>>>>>>>>> > > > > > 3. Inner IP TTL set to 1 to >>>>>>>>>> avoid >>>>>>>>>> > > forwarding of packet >>>>>>>>>> > > > > via inner IP >>>>>>>>>> > > > > > address. >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Thoughts? >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Thansk >>>>>>>>>> > > > > > Santosh P K >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>>>>> 9:20 AM Greg >>>>>>>>>> > Mirsky >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>> > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>>> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>> gregimirsky@gmail.com >>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com> >>>>>>>>>> > >>>>>>>>> >>>> >>>>>>>>>> > > > > > >>>>>>>>> gregimirsky@gmail.com >>>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>> gregimirsky@gmail.com >>>>>>>>>> > >> >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > >>>>> wrote: >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Hi Dinesh, >>>>>>>>>> > > > > > thank you for your >>>>>>>>>> consideration >>>>>>>>>> > of the >>>>>>>>>> > > > proposal and >>>>>>>>>> > > > > questions. What >>>>>>>>>> > > > > > would you see as the >>>>>>>>>> scope of >>>>>>>>>> > testing the >>>>>>>>>> > > > > connectivity for the >>>>>>>>>> > > > > > specific VNI? If it is >>>>>>>>>> > > tenant-to-tenant, then >>>>>>>>>> > > > VTEPs >>>>>>>>>> > > > > will treat these >>>>>>>>>> > > > > > packets as regular user >>>>>>>>>> frames. More >>>>>>>>>> > > likely, these >>>>>>>>>> > > > > could be Layer 2 >>>>>>>>>> > > > > > OAM, e.g. CCM frames. >>>>>>>>>> The reason >>>>>>>>>> > to use >>>>>>>>>> > > 127/8 for >>>>>>>>>> > > > > IPv4, and >>>>>>>>>> > > > > > >>>>>>>>>> 0:0:0:0:0:FFFF:7F00:0/104 for >>>>>>>>>> > IPv6 is >>>>>>>>>> > > to safeguard >>>>>>>>>> > > > > from leaking >>>>>>>>>> > > > > > Ethernet frames with >>>>>>>>>> BFD Control >>>>>>>>>> > packet >>>>>>>>>> > > to a >>>>>>>>>> > > > tenant. >>>>>>>>>> > > > > > You've suggested using >>>>>>>>>> a MAC >>>>>>>>>> > address to >>>>>>>>>> > > trap the >>>>>>>>>> > > > > control packet at >>>>>>>>>> > > > > > VTEP. What that address >>>>>>>>>> could be? We >>>>>>>>>> > > had proposed >>>>>>>>>> > > > > using the >>>>>>>>>> > > > > > dedicated MAC and >>>>>>>>>> VTEP's MAC and >>>>>>>>>> > both >>>>>>>>>> > > raised >>>>>>>>>> > > > concerns >>>>>>>>>> > > > > among VXLAN >>>>>>>>>> > > > > > experts. The idea of >>>>>>>>>> using >>>>>>>>>> > Management >>>>>>>>>> > > VNI may >>>>>>>>>> > > > be more >>>>>>>>>> > > > > acceptable >>>>>>>>>> > > > > > based on its similarity >>>>>>>>>> to the >>>>>>>>>> > practice >>>>>>>>>> > > of using >>>>>>>>>> > > > > Management VLAN. >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Regards, >>>>>>>>>> > > > > > Greg >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>>>>> 12:03 PM >>>>>>>>>> > Dinesh >>>>>>>>>> > > Dutt >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>> > >> >>>>>>>>>> > > > >>>>>>>>> didutt@gmail.com> >>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>> > >>> >>>>>>>>>> > > > > > >>>>>>>>> didutt@gmail.com >>>>>>>>>> > >>>>>>>>>> > > > >>>>>>>>>> > > > >>>>>>>>> didutt@gmail.com> >>>>>>>>>> > >> >>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>> > > > >>>>>>>>> didutt@gmail.com> >>>>>>>>>> > >>>>> >>>>>>>>>> > > > > wrote: >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Hi Greg, >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > As long as the >>>>>>>>>> inner MAC >>>>>>>>>> > address is >>>>>>>>>> > > such >>>>>>>>>> > > > that the >>>>>>>>>> > > > > packet is >>>>>>>>>> > > > > > trapped to the CPU, >>>>>>>>>> it should be >>>>>>>>>> > > fine for >>>>>>>>>> > > > use as >>>>>>>>>> > > > > an inner MAC is >>>>>>>>>> > > > > > it not? Stating >>>>>>>>>> that is >>>>>>>>>> > better than >>>>>>>>>> > > trying to >>>>>>>>>> > > > > force a management >>>>>>>>>> > > > > > VNI. What if >>>>>>>>>> someone wants >>>>>>>>>> > to test >>>>>>>>>> > > > connectivity >>>>>>>>>> > > > > on a specific >>>>>>>>>> > > > > > VNI? I would not >>>>>>>>>> pick a >>>>>>>>>> > loopback IP >>>>>>>>>> > > > address for >>>>>>>>>> > > > > this since that >>>>>>>>>> > > > > > address range is >>>>>>>>>> host/node local >>>>>>>>>> > > only. Is >>>>>>>>>> > > > there a >>>>>>>>>> > > > > reason you're >>>>>>>>>> > > > > > not using the VTEP >>>>>>>>>> IP as the >>>>>>>>>> > inner IP >>>>>>>>>> > > > address ? >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Dinesh >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > On Wed, Jul 31, >>>>>>>>>> 2019 at 5:48 AM >>>>>>>>>> > > Greg Mirsky >>>>>>>>>> > > > > > < >>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>> gregimirsky@gmail.com >>>>>>>>>> > >> >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > >>> >>>>>>>>> gregimirsky@gmail.com >>>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>> gregimirsky@gmail.com >>>>>>>>>> > >> >>>>>>>>>> > > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>> > > > >>>>>>>>> > >>>>>>>>>> > > >>>>>>>>> > >>>>> wrote: >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Dear All, >>>>>>>>>> > > > > > thank you for >>>>>>>>>> your comments, >>>>>>>>>> > > > suggestions on >>>>>>>>>> > > > > this issue, >>>>>>>>>> > > > > > probably the >>>>>>>>>> most >>>>>>>>>> > challenging >>>>>>>>>> > > for this >>>>>>>>>> > > > > specification. In the >>>>>>>>>> > > > > > course of our >>>>>>>>>> discussions, >>>>>>>>>> > > we've agreed to >>>>>>>>>> > > > > abandon the >>>>>>>>>> > > > > > request to >>>>>>>>>> allocate the >>>>>>>>>> > > dedicated MAC >>>>>>>>>> > > > address >>>>>>>>>> > > > > to be used as >>>>>>>>>> > > > > > the destination >>>>>>>>>> MAC >>>>>>>>>> > address in >>>>>>>>>> > > the inner >>>>>>>>>> > > > > Ethernet frame. >>>>>>>>>> > > > > > Also, earlier >>>>>>>>>> using VNI >>>>>>>>>> > 0 was >>>>>>>>>> > > changed from >>>>>>>>>> > > > > mandatory to one >>>>>>>>>> > > > > > of the options >>>>>>>>>> an >>>>>>>>>> > > implementation may >>>>>>>>>> > > > offer to >>>>>>>>>> > > > > an operator. >>>>>>>>>> > > > > > The most recent >>>>>>>>>> > discussion was >>>>>>>>>> > > whether >>>>>>>>>> > > > VTEP's >>>>>>>>>> > > > > MAC address >>>>>>>>>> > > > > > might be used >>>>>>>>>> as the >>>>>>>>>> > > destination MAC >>>>>>>>>> > > > address >>>>>>>>>> > > > > in the inner >>>>>>>>>> > > > > > Ethernet frame. >>>>>>>>>> As I >>>>>>>>>> > recall it, the >>>>>>>>>> > > > comments >>>>>>>>>> > > > > from VXLAN >>>>>>>>>> > > > > > experts equally >>>>>>>>>> split >>>>>>>>>> > with one >>>>>>>>>> > > for it >>>>>>>>>> > > > and one >>>>>>>>>> > > > > against. Hence >>>>>>>>>> > > > > > I would like to >>>>>>>>>> propose >>>>>>>>>> > a new >>>>>>>>>> > > text to >>>>>>>>>> > > > resolve >>>>>>>>>> > > > > the issue. The >>>>>>>>>> > > > > > idea is to let >>>>>>>>>> an >>>>>>>>>> > operator select >>>>>>>>>> > > > Management >>>>>>>>>> > > > > VNI and use >>>>>>>>>> > > > > > that VNI in >>>>>>>>>> VXLAN >>>>>>>>>> > encapsulation >>>>>>>>>> > > of BFD >>>>>>>>>> > > > > Control packets: >>>>>>>>>> > > > > > NEW TEXT: >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > An operator >>>>>>>>>> MUST >>>>>>>>>> > select a VNI >>>>>>>>>> > > > number to >>>>>>>>>> > > > > be used as >>>>>>>>>> > > > > > Management >>>>>>>>>> VNI. VXLAN >>>>>>>>>> > > packet for >>>>>>>>>> > > > > Management VNI MUST NOT >>>>>>>>>> > > > > > be sent to >>>>>>>>>> a tenant. VNI >>>>>>>>>> > > number 1 is >>>>>>>>>> > > > > RECOMMENDED as the >>>>>>>>>> > > > > > default for >>>>>>>>>> > Management VNI. >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > With that new >>>>>>>>>> text, what >>>>>>>>>> > can be the >>>>>>>>>> > > > value of >>>>>>>>>> > > > > the destination >>>>>>>>>> > > > > > MAC in the >>>>>>>>>> inner Ethernet? I >>>>>>>>>> > > tend to >>>>>>>>>> > > > believe >>>>>>>>>> > > > > that it can be >>>>>>>>>> > > > > > anything and >>>>>>>>>> ignored by the >>>>>>>>>> > > reciever VTEP. >>>>>>>>>> > > > > Also, if the >>>>>>>>>> > > > > > trapping is >>>>>>>>>> based on VNI >>>>>>>>>> > > number, the >>>>>>>>>> > > > > destination IP address >>>>>>>>>> > > > > > of the inner IP >>>>>>>>>> packet >>>>>>>>>> > can from >>>>>>>>>> > > the range >>>>>>>>>> > > > > 127/8 for IPv4, >>>>>>>>>> > > > > > and for IPv6 >>>>>>>>>> from the range >>>>>>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>>>>>>>> > > > > > lastly, the TTL >>>>>>>>>> to be >>>>>>>>>> > set to 1 (no >>>>>>>>>> > > > change here). >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Much appreciate >>>>>>>>>> your >>>>>>>>>> > comments, >>>>>>>>>> > > > questions, and >>>>>>>>>> > > > > suggestions. >>>>>>>>>> > > > > > >>>>>>>>>> > > > > > Best regards, >>>>>>>>>> > > > > > Greg >>>>>>>>>> > > > > > >>>>>>>>>> > > > > >>>>>>>>>> > > > >>>>>>>>>> > > >>>>>>>>>> > >>>>>>>>>> >>>>>>>>> --000000000000100f99058f8d9595 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Looks god to me Greg. Thank you for your hard work in= this,

Dinesh

On Wed, Aug 7, 2019 at 9:25= AM Greg Mirsky <gregimirsky@gm= ail.com> wrote:
Hi Dinesh, Joel, Sridhar, et al.,
much apprecia= te the help you've=C2=A0given me sharing your expertise. I hope that th= e updates you will find in the attached diff and the working copy of the dr= aft be closer to the acceptable solution for VTEP-VTEP BFD. Please note, th= at I'll shortly start a new discussion thread to address one of Carlos&= #39;s questions on the ambiguity of the text on multiple concurrent session= s between the same pair of VTEPs.
Please review the changes to Se= ctions 4 and 6 and share your feedback, suggestions, and questions.

Regards,
Greg

On Mon, Aug 5, 2019 at 6:03 = PM Dinesh Dutt <di= dutt@gmail.com> wrote:


On Mon, Aug 5, 2019 at = 5:56 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh,
thank you for = your expedient detailed response.
I believe that the ability to r= un BFD session up to a tenant (VTEP-VTEP-tenant or tenant-tenant) was never= in jeopardy from this specification.
I'm trying to provide p= recise specification on what can be used ad the destination MAC and IP addr= esses in the inner frame/packet as I believe that likely will help to avoid= interoperability issues.
I'm interested to learn some more a= bout the "martian checking" function. As you know, martian addres= ses have been used as destination IP address in LSP Ping and BFD over MPLS = LSP and PW. I haven't heard that any silicon feature caused problems fo= r operators using these tools.

= Interesting. I didn't know this aspect of use with MPLS ping. Did those= packets ever go through a firewall though? In any case, maybe suggest the = use of those addresses with a statement that this is how LSP does it, but t= hat other MAC/IP pairs are possible as long as the conditions of the endpoi= nt owning the MAC/IP was honored.

Dinesh
=
Regards,
Greg

On Mon, Aug 5, 2019 at 3:59 PM Din= esh Dutt <didutt@g= mail.com> wrote:
Hi Greg,

That we agr= ee on the problem definition is the first step forward. Your original docum= ent had my cases covered and so I was surprised by the track this thread to= ok. It doesn't matter, we're back on track.

My recommendation is to not worry about specifying the precise MAC/IP add= ress used in the inner header. The addresses chosen MUST ensure that the pa= cket is trapped to the control plane of the VTEP and not escape to the tena= nt if the BFD is to the VTEP. Any solution MUST also not preclude the use o= f the BFD by tenant systems for that VNI. There are many ways an implemente= r can choose to implement this. For example, the inner MAC address is whate= ver the VTEP implementer would return if ARP'd for the IP address used = in the inner header in the given VNI. The implementer can pick a fixed MAC = address, one that they own etc. Multiple BFD sessions can be run for testin= g path connectivity on more than one VNIs. Limits should be in place to avo= id overwhelming the receiver with BFD messages (you had words about this in= your currently published draft).=C2=A0 If the VNI is irrelevant in the tes= t i.e. only the VXLAN pipe at the VTEP is being tested. the user can use an= y VNI active on the VTEP on which the VTEP owns an IP address.
I'm concerned about the use of 127/8 address only because = of firewalls or implementations that drop packets with these addresses as e= ither the source or destination. For example, on many merchant silicon, I d= on't believe you can turn off martian checking and drops *only* for VXL= AN-encapsulated BFD packets. I don't know what the Linux kernel does to= day on such packets, for example (or Hyper-V). I'd like a solution that= doesn't demand additional or new chip functionality or require additio= nal middle-box hole punch.

Why do you feel you MUS= T to specify the MAC/IP address on the inner packet? What am I missing here= ?

Dinesh

On Mon, Aug 5, 2019 at 3:04 = PM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh,
wh= at do you see as the way forward? I agree, that the proposed text doesn'= ;t work for multi-VNI concurrent monitoring because these VNIs are tenant&#= 39;s VNIs. And in that case, we need to specify another mechanism to trap t= he BFD Control packet at VTEP. It seems that VTEP's Ethernet address mu= st be used as the destination MAC address in the inner Ethernet frame. The = destination IP address may be either VTEP's address of martian (I do pr= efer martian). Let me give it=C2=A0 try:
NEW TEXT:
<= div dir=3D"ltr">
To monitor continuity of the path between two VTEPs, a= n operator MUST select a VNI number to be used as Management VNI. Managemen= t VNI number MUST NOT be one of the tenant's VNIs to prevent sending VX= LAN packets received on Management VNI to a tenant. VNI number 1 is RECOMME= NDED as the default for Management VNI. [Ed.note: What we set the Destinati= on MAC to? Can it be invalid MAC that MUST be ignored on receipt?]
If an implementation supports concu= rrent monitoring of multiple VNIs, then the value of VNI number MAY be one = of tenant's VNIs. The destination MAC address in the inner Ethernet fra= me encapsulating BFD Control packet MUST be MAC associated with the remote = VTEP.=C2=A0
The destination IP address of the inner IP packet MUS= T be selected from the range 127/8 for IPv4, and for IPv6 from the range 0:= 0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set t= o 1.

Regards,
Greg=C2=A0

=
On Sun, Au= g 4, 2019 at 9:07 AM Dinesh Dutt <didutt@gmail.com> wrote:
Hi Greg,
<= br>
Thanks for your clarifications. I agree with your sentiment o= n why you're running BFD over VXLAN between VTEPs. I wasn't arguing= against it at all. All I was saying was pointing to the limitations of the= use of management VNI. I spoke to some operators who're running EVPN a= nd mentioned the discussion on this thread. They concur that they're us= ing specific VNIs to test connectivity over that VNI between VTEPs to ensur= e misconfiguration doesn't lead to blackholes. My statements are based = in real world operator experience. And I was providing language that ensure= d packets didn't leak across to tenants when they were destined to VTEP= s.

Dinesh

On Sat, Aug 3, 2019 at 10:34 AM= Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh,
many thanks for your = detailed updates on how some implementations process VXLAN header and the i= nner Ethernet frame. These are very helpful in achieving the workable solut= ion for the problem at hand.
You've noted that a path between= VTEPs may be monitored in the underlay network by merely establishing a BF= D session. That is true, but by using BFD with VXLAN encapsulation between = the pair of VTEPs we are extending the OAM domain by including, to some ext= ent, VXLAN forwarding engine. Abstract in RFC 5880 defines the goal and the= domain in which BFD protocol can detect a fault as:
=C2=A0 =C2= =A0This document describes a protocol intended to detect faults in the
= =C2=A0 =C2=A0bidirectional path between two forwarding engines, including=C2=A0 =C2=A0interfaces, data link(s), and to the extent possible the for= warding
=C2=A0 =C2=A0engines themselves, with potentially very low laten= cy.=C2=A0
Thus, BFD in the underlay will exercise a part of I= P forwarding engine while BFD with VXLAN encapsulation, ran between the sam= e pair of VTEPs, extends the OAM domain. At the same time, defining BFD bet= ween tenant systems in outside the goal of this specification. But VXLAN BF= D session between VTEPs may be useful in monitoring e2e path between tenant= s, as described in the update to -07:
=C2=A0 =C2=A0At the same ti= me, a service layer BFD session may be used between the
=C2=A0 =C2=A0ten= ants of VTEPs IP1 and IP2 to provide end-to-end fault management.
=C2=A0= =C2=A0In such case, for VTEPs BFD control packets of that session are
= =C2=A0 =C2=A0indistinguishable from data packets.=C2=A0 If end-to-end defec= t detection
=C2=A0 =C2=A0is realized as the set of concatenated OAM doma= ins, e.g., VM1-1 - IP1
=C2=A0 =C2=A0-- IP2 - VM2-1, then the BFD session= over VXLAN between VTEPs SHOULD
=C2=A0 =C2=A0follow the procedures desc= ribed in Section 6.8.17 [RFC5880].
I've attached the curr= ent working version of the draft.

Regards,
Greg


On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt &l= t;didutt@gmail.com> wrote:
What I mean is "How do you infer that it excludes t= he case I'm talking about?".

Dinesh<= br>

On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt <didutt@gmail.com> wrote:
The abs= tract reads this: "
This document describes the use of the Bid=
irectional Forwarding
   Detection (BFD) protocol in point-to-point Virtual eXtensible Local
   Area Network (VXLAN) tunnels forming up an overlay network."
How do you infer w=
hat you said?

Dinesh

On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halp= ern <jmh@joelha= lpern.com> wrote:
I am going by what the draft says its purpose is.=C2=A0 If you (= Dinesh) want
the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft.
As currently written, the behavior Greg proposed meets the needs, and
does so in a way that is consistent with VxLAN.

Yours,
Joel

On 8/2/2019 8:30 PM, Dinesh Dutt wrote:
> What is the stated purpose of this BFD session? The VTEP reachability = is
> determined by the underlay, I don't need VXLAN-encaped packet for = that.
> Do we agree?
>
> If I want to test the VXLAN encap/decap functionality alone, picking a= ny
> single VNI maybe fine. But is this all any network operator wants? Why= ?
> In what situations has this been a problem? I suspect operators also <= br> > want to verify path continuity over a specific VNI. If you say this is=
> not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs <= br> > (see section 3). More importantly, this is a real problem that operato= rs
> like to verify.
>
> Dinesh
>
> On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jm= h@joelhalpern.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0What is special about the management VNI is precise= ly that it is NOT a
>=C2=A0 =C2=A0 =C2=A0tenant VNI.=C2=A0 The VxLAN administration does kno= w how it allocates VNI to
>=C2=A0 =C2=A0 =C2=A0tenants, and which VNI it has allocated.=C2=A0 In c= ontrast, it does not know
>=C2=A0 =C2=A0 =C2=A0which IP addresses or MAC adddresses teh tenant is = using or may plan
>=C2=A0 =C2=A0 =C2=A0to use.
>
>=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0Joel
>
>=C2=A0 =C2=A0 =C2=A0On 8/2/2019 6:41 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 > The assumption of an IP address within any VN= I is suspect that way.
>=C2=A0 =C2=A0 =C2=A0 > What's special about a single VNI, the ma= nagement VNI? The VTEP IP
>=C2=A0 =C2=A0 =C2=A0 > address does not belong in reality in any VNI= .
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halper= n
>=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>= wrote:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Your response seems to mis= s two points:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0First, the problem you des= cribe is not what the document says
>=C2=A0 =C2=A0 =C2=A0it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0solving.=C2=A0 To the degr= ee it discusses it at all, the document
>=C2=A0 =C2=A0 =C2=A0says "
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 =C2=A0In
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0most cases, a single BFD s= ession is sufficient for the given
>=C2=A0 =C2=A0 =C2=A0VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the reachability o= f a remote VTEP, regardless of the
>=C2=A0 =C2=A0 =C2=A0number of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNIs in common. "
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Second, you assume the exi= stence of an IP address for a VTEP
>=C2=A0 =C2=A0 =C2=A0within a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI.=C2=A0 As with the MAC= address, the VTEP does not have an IP
>=C2=A0 =C2=A0 =C2=A0address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0within the VNI.=C2=A0 Some= implementations may have created such a
>=C2=A0 =C2=A0 =C2=A0thing,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0but
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the general construct, as = defined to date, does not support such.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0In short, you are requirin= g a behavior that violates the
>=C2=A0 =C2=A0 =C2=A0architectural
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0structure of overlay / und= erlay separation, and common
>=C2=A0 =C2=A0 =C2=A0usage.=C2=A0 And you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0are doing so to support a = use case that the working group has not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0indicated in the document = as important.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0On 8/2/2019 5:01 PM, Dines= h Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > You understood corre= ctly.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > The VNIs may not sha= re fate due to misconfiguration. And I
>=C2=A0 =C2=A0 =C2=A0strongly
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > suspect someone will= want to use BFD for that because its
>=C2=A0 =C2=A0 =C2=A0about
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0checking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > path continuity as s= tated by the draft. As long as there's a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0valid IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > (because it's BF= D) owned by the VTEP in that VNI, you can
>=C2=A0 =C2=A0 =C2=A0use BFD in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > that VNI. Thats all = that you need to dictate.=C2=A0 That IP address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0has a MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > address and you can = use that on the inner frame. That is
>=C2=A0 =C2=A0 =C2=A0all normal
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > VXLAN processing. Th= e outer IP is always that of the VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 = at 11:03 AM Joel M. Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com= >
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com &= lt;mailto:jmh@joel= halpern.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>> w= rote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0I= f I am reading your various emails correctly Dinesh
>=C2=A0 =C2=A0 =C2=A0(and I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0may have
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0m= issed something) you are trying to use the MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0because you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= ant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= o be able to send these BFD packets over arbitrary VNI to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= NI.=C2=A0 That is not a requirement identified in the
>=C2=A0 =C2=A0 =C2=A0document.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0It is not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= ven a problem I understand, since all the VNI between an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0ingress and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= gress VTEP share fate.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Y= ours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0J= oel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0O= n 8/2/2019 1:44 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Thanks for verifying this. On Linux and hardware
>=C2=A0 =C2=A0 =C2=A0routers
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0that I'm
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ware
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > of (Cisco circa 2012 and Cumulus), the physical MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eused
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > across the VNIs on the VTEP. Did you check on a non-VMW
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0device?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0T= his is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > more for my own curiosity.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > To address the general case, can we not define a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0well-known (or
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eserve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > one) unicast MAC address for use with VTEP? If the MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > configurable in BFD command, this can be moot.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > <= santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0I have cross checked point raised about MAC address=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0usage. It is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0possible that tenant could be using physical MAC >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= hen a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packet comes with valid VNI with a MAC address
>=C2=A0 =C2=A0 =C2=A0that is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0being
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= sed by
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0tenant then packet will be sent to that tenant.
>=C2=A0 =C2=A0 =C2=A0This rules
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ut the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0fact that we could use physical MAC address as
>=C2=A0 =C2=A0 =C2=A0inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0MAC to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= nsure
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packets get terminated at VTEP itself.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 11:00 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0<santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks for your inputs.= I checked
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation within
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Vmware. Perhaps I should have been mo= re clear
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0about MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0space while checking internally. I wi= ll cross
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0check again for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the same and get back on this list. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 10:54 AM Joel= M.
>=C2=A0 =C2=A0 =C2=A0Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:jmh@joel= halpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>>&g= t; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sorry to ask a stupid q= uestion.=C2=A0 Whose
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The reason I ask is tha= t as far as I
>=C2=A0 =C2=A0 =C2=A0can tell,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0since the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tenant does not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have any control access= to the VTEP,
>=C2=A0 =C2=A0 =C2=A0there is no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eason for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have a MAC address in t= he tenant
>=C2=A0 =C2=A0 =C2=A0space.=C2=A0 Yes, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0d= evice has
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a physical
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address.=C2=A0 But = the tenant could well be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0using that MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address.=C2=A0 Yes,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they would be violating= the Ethernet spec.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0But the whole
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0point of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0segregation is not to c= are about such
>=C2=A0 =C2=A0 =C2=A0issues.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On the other hand, if y= ou tell me that
>=C2=A0 =C2=A0 =C2=A0the VMWare
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0implementation has an >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet address that i= s part of the tenant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0space, well,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they made up
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this particular game. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 7/31/2019 1:44 PM, S= antosh P K wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > I have checked wi= th implementation
>=C2=A0 =C2=A0 =C2=A0in data
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0path.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0W= hen we
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0receive a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > packet with valid= VNI then lookup
>=C2=A0 =C2=A0 =C2=A0for MAC will
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0h= appen and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it is VTEP own
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > MAC then it will = be trapped to control
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0plane for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0processing. I think we<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > can have followin= g options
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 1. Optional manag= ment VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 2. Mandatory inne= r MAC set to VTEP mac
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 3. Inner IP TTL s= et to 1 to avoid
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0forwarding of packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0via inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > address.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thoughts?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thansk
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > On Wed, Jul 31, 2= 019 at 9:20 AM Greg
>=C2=A0 =C2=A0 =C2=A0Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>&g= t;>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > <mailto:gregimirsky@gmail.com<= /a>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0thank you for your consideration
>=C2=A0 =C2=A0 =C2=A0of the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0p= roposal and
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>=C2=A0 =C2=A0 =C2=A0testing the
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tenant-to-tenant, then
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEPs
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0packets as regular user frames. More
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0likely, these
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0could be Layer 2
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0OAM, e.g. CCM frames. The reason
>=C2=A0 =C2=A0 =C2=A0to use
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>=C2=A0 =C2=A0 =C2=A0packet
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0You've suggested using a MAC
>=C2=A0 =C2=A0 =C2=A0address to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trap the
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0had proposed
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>=C2=A0 =C2=A0 =C2=A0both
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= oncerns
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0experts. The idea of using
>=C2=A0 =C2=A0 =C2=A0Management
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI may
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>=C2=A0 =C2=A0 =C2=A0practice
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0On Wed, Jul 31, 2019 at 12:03 PM
>=C2=A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Dutt
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com> <mailto:didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0<mailto:didutt@= gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>>>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Hi Greg,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0As long as the inner MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0such
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= hat the
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0trapped to the CPU, it should be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0fine for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= se as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an inner MAC is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0it not? Stating that is
>=C2=A0 =C2=A0 =C2=A0better than
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trying to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0force a management
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>=C2=A0 =C2=A0 =C2=A0to test
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>=C2=A0 =C2=A0 =C2=A0loopback IP
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this since that
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0address range is host/node local
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= here a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reason you're
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0not using the VTEP IP as the
>=C2=A0 =C2=A0 =C2=A0inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress ?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Greg Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>> <mailto:gregimirsky@gmail.c= om
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0s= uggestions on
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this issue,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most
>=C2=A0 =C2=A0 =C2=A0challenging
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for this
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0specification. In the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussions,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0we've agreed to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0abandon the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0dedicated MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0to be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC
>=C2=A0 =C2=A0 =C2=A0address in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI
>=C2=A0 =C2=A0 =C2=A00 was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0changed from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0mandatory to one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation may
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ffer to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an operator.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent
>=C2=A0 =C2=A0 =C2=A0discussion was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0whether
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEP's
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0destination MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0in the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I
>=C2=A0 =C2=A0 =C2=A0recall it, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= omments
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0from VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split
>=C2=A0 =C2=A0 =C2=A0with one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for it
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= nd one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0against. Hence
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose
>=C2=A0 =C2=A0 =C2=A0a new
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0text to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= esolve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the issue. The
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0idea is to let an
>=C2=A0 =C2=A0 =C2=A0operator select
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0M= anagement
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI and use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN
>=C2=A0 =C2=A0 =C2=A0encapsulation
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of BFD
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Control packets:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operator MUST
>=C2=A0 =C2=A0 =C2=A0select a VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0n= umber to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI. VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0packet for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI MUST NOT=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent to a tenant. VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number 1 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default for
>=C2=A0 =C2=A0 =C2=A0Management VNI.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, what
>=C2=A0 =C2=A0 =C2=A0can be the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0v= alue of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethernet? I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tend to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= elieve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that it can be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0reciever VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, if the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0destination IP address<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet
>=C2=A0 =C2=A0 =C2=A0can from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/1= 04. And
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be
>=C2=A0 =C2=A0 =C2=A0set to 1 (no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= hange here).
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your
>=C2=A0 =C2=A0 =C2=A0comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0q= uestions, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0suggestions.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >
>
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Thu, 8 Aug 2019 01:17:59 +0000 From: "Carlos Pignataro (cpignata)" To: Greg Mirsky CC: rtg-bfd WG , "bfd-chairs@ietf.org" , Martin Vigoureux Subject: Re: BFD Echo mode coverage in BFD for VXLAN Thread-Topic: BFD Echo mode coverage in BFD for VXLAN Thread-Index: AQHVS9ttIYFask/CDUmSDDsOiI40EabwdoSA Date: Thu, 8 Aug 2019 01:17:59 +0000 Message-ID: <3747ADED-2F3A-42B8-BD72-20218D167DEE@cisco.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3445.104.11) authentication-results: spf=none (sender IP is ) smtp.mailfrom=cpignata@cisco.com; x-originating-ip: [173.38.117.94] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: fa67a642-df82-44c2-6228-08d71b9e40a0 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:BL0PR11MB3217; x-ms-traffictypediagnostic: BL0PR11MB3217: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear Greg, The option of replacing the existing text for something more ambiguous and = implicit does not seem like progress in my humble opinion. The spec ends up= with the same capabilities, but the text is more obscure. I do not support= that option. My recommendation for your consideration would be: 1. Explore if it is possible to run BFD Echo as a single-hop. 2. If yes, add text supporting it. 3. If no, add text explaining why not on technical grounds. A less desirable option would be if the WG does not care about BFD Echo, to= explicitly keep it out of scope (not on technical grounds). Best, Carlos. On Aug 5, 2019, at 6:16 PM, Greg Mirsky > wrote: Dear All, in course of reviews of the draft, several times a question was asked about= the rationale for excluding BFD Echo from the scope of this document: 7. Echo BFD Support for echo BFD is outside the scope of this document. Much appreciate your consideration of the following options: * describe the applicability of BFD Echo in VXLAN environment in the do= cument; * remove Section 7 and clarify in the Introduction NEW TEXT: This specification describes procedures only for BFD Asynchronous mode. * make no changes at all. Regards, Greg --_000_3747ADED2F3A42B8BD7220218D167DEEciscocom_ Content-Type: text/html; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable Dear Greg,

The option of replacing the existing text for something mor= e ambiguous and implicit does not seem like progress in my humble opinion. = The spec ends up with the same capabilities, but the text is more obscure. = I do not support that option.

My recommendation for your consideration would be:
  1. Explore if it is possible to run BFD Echo as a single-hop.
  2. If yes, add text supporting it.
  3. If no,= add text explaining why not on technical grounds.

A less desirable option would be if the WG does not care ab= out BFD Echo, to explicitly keep it out of scope (not on technical grounds)= .

Best,

Carlos.

On Aug 5, 2019, at 6:16 PM, Greg Mirsky <gregimirsky@gmail.com> wrote:
Dear All,
in course of reviews of the draft, several times a question= was asked about the rationale for excluding BFD Echo from the scope of thi= s document:

7.  Echo BFD

   Support for echo BFD is outside the scope of t= his document.
Much appreciate your consideration of the following options:
  • describe the applicability of BFD Echo in VXLAN environment = in the document;
  • remove Section 7 and clarify in the Int= roduction
NEW TEXT:
This specification describes procedures only for BFD Asynch= ronous mode.
  • make no changes at all.
Regards,
Greg

--_000_3747ADED2F3A42B8BD7220218D167DEEciscocom_-- From nobody Thu Aug 8 16:07:15 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6EAAA12006D; Thu, 8 Aug 2019 16:07:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uc6kEJRtbPwZ; Thu, 8 Aug 2019 16:07:11 -0700 (PDT) Received: from mail-lj1-x22c.google.com (mail-lj1-x22c.google.com [IPv6:2a00:1450:4864:20::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 91D6512003E; Thu, 8 Aug 2019 16:07:11 -0700 (PDT) Received: by mail-lj1-x22c.google.com with SMTP id m8so56811130lji.7; Thu, 08 Aug 2019 16:07:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=9rGB6deOPegoLwDtwo6ZNDCH2FgA/EEWkiNUjhISojY=; b=KBDFbDnXxC7CR3XbQbtGT4n+DtLuJG4DeP7ovPjam/Ij/YBV/QBmV2M5dyWcI71FiP qHq77tqsMq7O6eRIRSBxe9bwcGE1r66smf9b3HadDk4tvPRkIjj0R0FzHQhOA8kSGgSB q0jXl8LxNncuLq1nmNTBGk4JH/pPywQKAAY/R3pQbI3jU/pt5Caxgd2nvSTRgzIcfQw1 XwC85MV4tIFNWETXjTYr4PgCbGNqWiDONRnIUdUcOYl5E0a+ZLpNJoVe5xRGQ22qmWYP aANceZODF+rHUO69CQyo0w7uqabc5wOSUk5aV5dGEE71wiVNIHn9TDQgxyo1X5vf7pRC mgKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=9rGB6deOPegoLwDtwo6ZNDCH2FgA/EEWkiNUjhISojY=; b=du+IxvreKh7zfgbLtESrmlhxykyEAl0DZDT2OzTy+mYS6HjzMt3CbdFN82wF7FqvzK c832wjVBMrlFN8Aln3KDJ3P8EA8w5BXY2U2Xt+K351jkI6r/7USY7Eq2Fi0PqaJZno2a B1CTc7IU0uBkypbATH+fUXNmZyBbrsJERm6/XRyLEJxVX7teG+xX3tl9fTByEAC9i4zJ RGjXQSGg/RYmN/m9yZodepEFXRit8+MsnJzWN54yEx/tz09leIbLZNJ0/RBHUl91yn0k 8UWwzUcwL8J6mDtoT/xzAYVhtE7JQeqgxegKOoAI6dC1TcKRTz5seCnS3z8euFX/f+3h D/Yg== X-Gm-Message-State: APjAAAWp1DUfFs6W1H4PCvpeZr6Kdf9mchm1fkuT+BSdi6Nn8uqLWMm6 JH0E/oDIxqnpypUe43Tj81n5+y0HSzbb1cwpaYE= X-Google-Smtp-Source: APXvYqyTc0W4psdrSyjMyREVF2oBwUZkzBWj9kfbr8+56uHhzMYxtI6n2f84DGgvUYF5J61t2t4+CUf1GdiFWZzQYb4= X-Received: by 2002:a2e:9ac6:: with SMTP id p6mr9822820ljj.100.1565305629768; Thu, 08 Aug 2019 16:07:09 -0700 (PDT) MIME-Version: 1.0 References: <3747ADED-2F3A-42B8-BD72-20218D167DEE@cisco.com> In-Reply-To: <3747ADED-2F3A-42B8-BD72-20218D167DEE@cisco.com> From: Greg Mirsky Date: Thu, 8 Aug 2019 16:06:59 -0700 Message-ID: Subject: Re: BFD Echo mode coverage in BFD for VXLAN To: "Carlos Pignataro (cpignata)" Cc: rtg-bfd WG , "bfd-chairs@ietf.org" , Martin Vigoureux Content-Type: multipart/alternative; boundary="00000000000007008b058fa31ec2" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Aug 2019 23:07:14 -0000 --00000000000007008b058fa31ec2 Content-Type: text/plain; charset="UTF-8" Dear All, I have not set the when this poll closes. I hope that two weeks would be sufficient time for the WG community to express their thoughts. Dear Carlos, thank you for sharing your opinion on the scope of the document in regard to BFD Echo mode. You've expressed support for exploring the applicability of the BFD Echo mode. Would you support that effort by contributing some text, if WG decides that documenting the applicability of the Echo mode in BFD over VXLAN is useful? Regards, Greg On Wed, Aug 7, 2019 at 6:18 PM Carlos Pignataro (cpignata) < cpignata@cisco.com> wrote: > Dear Greg, > > The option of replacing the existing text for something more ambiguous and > implicit does not seem like progress in my humble opinion. The spec ends up > with the same capabilities, but the text is more obscure. I do not support > that option. > > My recommendation for your consideration would be: > > 1. Explore if it is possible to run BFD Echo as a single-hop. > 2. If yes, add text supporting it. > 3. If no, add text explaining why not on technical grounds. > > > A less desirable option would be if the WG does not care about BFD Echo, > to explicitly keep it out of scope (not on technical grounds). > > Best, > > Carlos. > > On Aug 5, 2019, at 6:16 PM, Greg Mirsky wrote: > > Dear All, > in course of reviews of the draft, several times a question was asked > about the rationale for excluding BFD Echo from the scope of this document: > > 7. Echo BFD > > Support for echo BFD is outside the scope of this document. > > Much appreciate your consideration of the following options: > > - describe the applicability of BFD Echo in VXLAN environment in the > document; > - remove Section 7 and clarify in the Introduction > > NEW TEXT: > > This specification describes procedures only for BFD Asynchronous mode. > > > - make no changes at all. > > Regards, > Greg > > > --00000000000007008b058fa31ec2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
I have not set the when this poll= closes. I hope that two weeks would be sufficient time for the WG communit= y to express their thoughts.

Dear Carlos,
than= k you for sharing your opinion on the scope of the document in regard to BF= D Echo mode.=C2=A0You've expressed support for exploring the applicabil= ity of the BFD Echo mode. Would you support that effort by contributing som= e text, if WG decides that documenting the applicability of the Echo mode i= n BFD over VXLAN is useful?

Regards,
Greg


On Wed, Aug 7, 2019 at 6:18 PM Carlos Pignata= ro (cpignata) <cpignata@cisco.com<= /a>> wrote:
Dear Greg,

The option of replacing the existing text for something more ambiguous= and implicit does not seem like progress in my humble opinion. The spec en= ds up with the same capabilities, but the text is more obscure. I do not su= pport that option.

My recommendation for your consideration would be:
  1. Explore if it is possible to run BFD Echo as a single-hop.
  2. If y= es, add text supporting it.
  3. If no, add text explaining why not on t= echnical grounds.

A less desirable option would be if the WG does not care about BFD Ech= o, to explicitly keep it out of scope (not on technical grounds).

Best,

Carlos.


Dear All,
in course of reviews of the draft, several times a question was asked = about the rationale for excluding BFD Echo from the scope of this document:=

7.=C2=A0 Echo BFD

=C2=A0 =C2=A0Support for echo BFD is outside the scope of this documen= t.
Much appreciate your consideration of the following options:
  • describe the applicability of BFD Echo in VXLAN environment in the docu= ment;
  • remove Section 7 and clarify in the Introduction
NEW TEXT:
This specification describes procedures only for BFD Asynchronous mode= .
  • make no changes at all.
Regards,
Greg

--00000000000007008b058fa31ec2-- From nobody Thu Aug 8 17:04:01 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C1F8D120088; Thu, 8 Aug 2019 17:03:59 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pMHhU_SRyU3N; Thu, 8 Aug 2019 17:03:58 -0700 (PDT) Received: from mail-lj1-x234.google.com (mail-lj1-x234.google.com [IPv6:2a00:1450:4864:20::234]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A2E63120025; Thu, 8 Aug 2019 17:03:57 -0700 (PDT) Received: by mail-lj1-x234.google.com with SMTP id t28so90497888lje.9; Thu, 08 Aug 2019 17:03:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=HRgUPmkV7fmYBSdxgn6x/ptcFu2pj4Ty6C3+ZFGEhNw=; b=H95330tSnLUxNXR/YMSJXdfshXtX/avdx9LMkOvTNVe/givUC0zK27C3SOT5OwpMoC BbB+GjCH/6DZd17I2Jsoj798RdHY3bJ9so89xWldJKkQ4EbDfIkZ+n8Ke0mC4HtcQRdc X+tWAIrlMP322TqcGTDk8yxOFNUARuB17i5izi6q/gi5YHOLNbPFhW/aJuL4Ut1MsprF OsIYcoz6jZ3F7sPjpo6yARprErtNii/GFct1SVPFj8Yz8+Rx/3jDlhuU+4FkB/oCH26B pyK5hAACn0pxRN+gHNSFAFrtGugEFfnxoyoV2zZZoyJfpeeNgiT1Lxu88GgoK5TCmg9D G7OQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=HRgUPmkV7fmYBSdxgn6x/ptcFu2pj4Ty6C3+ZFGEhNw=; b=AYmR1P4ay2byHhgaFebU3ylf3sAdrNzM8gGogQpBZYEYDNcwllLFG5ArtO0qO1o1pz tYi6PevJTVvmqrB5UgsaxmflouuOdaoC1WUBvVRGDTpq0vpbpEC+3g4c9rpmHDpzLldR OfDM3fjxfA4pQMW4Ik3K5tTeJY23dDXhuUjlq7GjlO3HjM+IIfJfcMgWMlI/E8DGw6sA ntqP4+OYnxwQhTmVERmMzFT4F7tN++P/oAm1Ake3fls+8VQYS2eeg+GyFL97nE8P3YEs bUH3OQn43iFtGQ+Qy5eEU22tB0FFnxNUiBScHMKiI33sRHK7QSwGcdvy3RHCGWzrZB1M 6lZw== X-Gm-Message-State: APjAAAVj9fbVyuADxSidQ+S/sGHIVkNWd5eiRuKrSlVrgPhnUQT6lAFe PnYAcHJknMgmQ+JnCiOw9ZyJuGQA8Minf8B1ZFdi1Q== X-Google-Smtp-Source: APXvYqwYieiqvMr3nO0ZeCYVPxd9OXam0ge+lLBkNISeIFSx3K0B6mrwH4viznJvpUdkiHtxlTsUShBp29sabgdbnys= X-Received: by 2002:a2e:7614:: with SMTP id r20mr9880495ljc.42.1565309035913; Thu, 08 Aug 2019 17:03:55 -0700 (PDT) MIME-Version: 1.0 References: <3747ADED-2F3A-42B8-BD72-20218D167DEE@cisco.com> In-Reply-To: From: Greg Mirsky Date: Thu, 8 Aug 2019 17:03:45 -0700 Message-ID: Subject: Re: BFD Echo mode coverage in BFD for VXLAN To: "Carlos Pignataro (cpignata)" Cc: rtg-bfd WG , "bfd-chairs@ietf.org" , Martin Vigoureux Content-Type: multipart/alternative; boundary="0000000000000ca838058fa3e9f2" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Aug 2019 00:04:00 -0000 --0000000000000ca838058fa3e9f2 Content-Type: text/plain; charset="UTF-8" Dear All, I was pointed out that my previous e-mail asking for WG help to progress BFD over VXLAN document by sharing opinions regarding coverage of the BFD Echo mode may be overstepping the bounds of an Editor. I apologize, that was not my intention. I'm asking WG Chairs to help to arrive at the conclusion of this question in a reasonable time. Regards, Greg On Thu, Aug 8, 2019 at 4:06 PM Greg Mirsky wrote: > Dear All, > I have not set the when this poll closes. I hope that two weeks would be > sufficient time for the WG community to express their thoughts. > > Dear Carlos, > thank you for sharing your opinion on the scope of the document in regard > to BFD Echo mode. You've expressed support for exploring the applicability > of the BFD Echo mode. Would you support that effort by contributing some > text, if WG decides that documenting the applicability of the Echo mode in > BFD over VXLAN is useful? > > Regards, > Greg > > > On Wed, Aug 7, 2019 at 6:18 PM Carlos Pignataro (cpignata) < > cpignata@cisco.com> wrote: > >> Dear Greg, >> >> The option of replacing the existing text for something more ambiguous >> and implicit does not seem like progress in my humble opinion. The spec >> ends up with the same capabilities, but the text is more obscure. I do not >> support that option. >> >> My recommendation for your consideration would be: >> >> 1. Explore if it is possible to run BFD Echo as a single-hop. >> 2. If yes, add text supporting it. >> 3. If no, add text explaining why not on technical grounds. >> >> >> A less desirable option would be if the WG does not care about BFD Echo, >> to explicitly keep it out of scope (not on technical grounds). >> >> Best, >> >> Carlos. >> >> On Aug 5, 2019, at 6:16 PM, Greg Mirsky wrote: >> >> Dear All, >> in course of reviews of the draft, several times a question was asked >> about the rationale for excluding BFD Echo from the scope of this document: >> >> 7. Echo BFD >> >> Support for echo BFD is outside the scope of this document. >> >> Much appreciate your consideration of the following options: >> >> - describe the applicability of BFD Echo in VXLAN environment in the >> document; >> - remove Section 7 and clarify in the Introduction >> >> NEW TEXT: >> >> This specification describes procedures only for BFD Asynchronous mode. >> >> >> - make no changes at all. >> >> Regards, >> Greg >> >> >> --0000000000000ca838058fa3e9f2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
I was pointed out that my previous e-mail as= king for WG help to progress BFD over VXLAN document by sharing opinions re= garding coverage of the BFD Echo mode may be overstepping the bounds of an = Editor. I apologize, that was not my intention. I'm asking WG Chairs to= help to arrive at the conclusion of this question in a reasonable time.

Regards,
Greg

On Thu, Aug 8, 2019 at = 4:06 PM Greg Mirsky <gregimirsk= y@gmail.com> wrote:
Dear All,
I have not set the whe= n this poll closes. I hope that two weeks would be sufficient time for the = WG community to express their thoughts.

Dear Carlo= s,
thank you for sharing your opinion on the scope of the document in r= egard to BFD Echo mode.=C2=A0You've expressed support for exploring the= applicability of the BFD Echo mode. Would you support that effort by contr= ibuting some text, if WG decides that documenting the applicability of the = Echo mode in BFD over VXLAN is useful?

Regar= ds,
Greg


On Wed, Aug 7, 2019 at 6:18 PM Carlo= s Pignataro (cpignata) <cpignata@cisco.com> wrote:
Dear Greg,

The option of replacing the existing text for something more ambiguous= and implicit does not seem like progress in my humble opinion. The spec en= ds up with the same capabilities, but the text is more obscure. I do not su= pport that option.

My recommendation for your consideration would be:
  1. Explore if it is possible to run BFD Echo as a single-hop.
  2. If y= es, add text supporting it.
  3. If no, add text explaining why not on t= echnical grounds.

A less desirable option would be if the WG does not care about BFD Ech= o, to explicitly keep it out of scope (not on technical grounds).

Best,

Carlos.

On Aug 5, 2019, at 6:16 PM, Greg Mirsky <gregimirsky@gmail.com> wrote:

Dear All,
in course of reviews of the draft, several times a question was asked = about the rationale for excluding BFD Echo from the scope of this document:=

7.=C2=A0 Echo BFD

=C2=A0 =C2=A0Support for echo BFD is outside the scope of this documen= t.
Much appreciate your consideration of the following options:
  • describe the applicability of BFD Echo in VXLAN environment in the docu= ment;
  • remove Section 7 and clarify in the Introduction
NEW TEXT:
This specification describes procedures only for BFD Asynchronous mode= .
  • make no changes at all.
Regards,
Greg

--0000000000000ca838058fa3e9f2-- From nobody Thu Aug 8 17:19:01 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8E5C512003E; Thu, 8 Aug 2019 15:57:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.596 X-Spam-Level: X-Spam-Status: No, score=-0.596 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_COMMENT_SAVED_URL=1.391, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_HTML_ATTACH=0.01, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id H03y_nRkJOvm; Thu, 8 Aug 2019 15:57:14 -0700 (PDT) Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E069C12002F; Thu, 8 Aug 2019 15:57:12 -0700 (PDT) Received: by mail-lf1-x129.google.com with SMTP id x3so14290853lfn.6; Thu, 08 Aug 2019 15:57:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=KF7gyL7zGhSxQJgUNPHjXmTdnpW71kKvnH7uk0bKvHU=; b=Kg8W3/SN+w5kZrD87OpkhPqF6Qgjnc9j5z41yeKEHQod5o684PwYpXPhbxdAqyWR2y fSrz1v1PZkQI6ONn/FdR+CJYgW1cpsGhujn6N6F6Z78Efzz4bybIlBJaNYkKvkCNm7XD c6M8g94ZHZdnAMgfz1l6LWO50sN478o05Ax0qghsdYr7OESZYYu69xAI4p6K3sz2nEpA d+CDG/iV+IKXpsi7M89xVtZ22gqmO1VsFtnQLz28z7CBPgXuia6LBeXojtU3ARre2xSi +cABhn1X0GiZXz3EP1qM8RF88yT4A2Ca0njPe97DtZgts8jFcyJWYWvmxNNFe8cN0VmK zI3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=KF7gyL7zGhSxQJgUNPHjXmTdnpW71kKvnH7uk0bKvHU=; b=MLmm+hNaDX/voSTjC5cJ2Fn+rkYkYWBRcSpkpbFELnpHl98YHLh13jj4rXxpbsxkwl jLvyEzZl/Wgn9D8yvor6GRdUpn+lIu00ngL/gH6fM2SxsOEORa2coFmU2SK+GSZ55waI QS8TjyYg4uS+jbv/TYTXcgyI0umxfbXsSaXM4cwmAABWy0wT+sLFbYrOYvhZbKfot+Mj Gd2AMzczXQPfJzfyoVhRjkfOqszxL9vehqhiL08pNyDrX3MCQUDWlmCavVJqaQzZEQnY i5EQMJgZIFqbSf5YYyxBbWD9R9PVjx3CQR8N48mhIU+R25ZxqSFBYrHlpxolSFuRITQk ErvQ== X-Gm-Message-State: APjAAAV92AgUrchqHQtTx1oGyLEXeFxwWr09/qrnekwWotGqHmaTpv3N gnu6B9bdbttpQCseaTVgWtGALylfzqlAvqW1/HY= X-Google-Smtp-Source: APXvYqzAN6PHm1ogk4273zfn4/nPCStQ5I4ShfGxC5Sre0nFUnLgz00IyY24fOBLxxZC4Ym+2/e09RvMwW0Q/dmaVF0= X-Received: by 2002:a19:9111:: with SMTP id t17mr10680297lfd.113.1565305030902; Thu, 08 Aug 2019 15:57:10 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Greg Mirsky Date: Thu, 8 Aug 2019 15:56:58 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Dinesh Dutt Cc: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/mixed; boundary="00000000000055a59c058fa2fab6" Archived-At: X-Mailman-Approved-At: Thu, 08 Aug 2019 17:19:00 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Aug 2019 22:57:23 -0000 --00000000000055a59c058fa2fab6 Content-Type: multipart/alternative; boundary="00000000000055a598058fa2fab4" --00000000000055a598058fa2fab4 Content-Type: text/plain; charset="UTF-8" Dinesh, thank you for your help, much appreciated. Hi Joel and Sridhar, could you please check if the updated text on the inner Ethernet frame addressed your concern. On Wed, Aug 7, 2019 at 2:25 PM Dinesh Dutt wrote: > Looks god to me Greg. Thank you for your hard work in this, > > Dinesh > > On Wed, Aug 7, 2019 at 9:25 AM Greg Mirsky wrote: > >> Hi Dinesh, Joel, Sridhar, et al., >> much appreciate the help you've given me sharing your expertise. I hope >> that the updates you will find in the attached diff and the working copy of >> the draft be closer to the acceptable solution for VTEP-VTEP BFD. Please >> note, that I'll shortly start a new discussion thread to address one of >> Carlos's questions on the ambiguity of the text on multiple concurrent >> sessions between the same pair of VTEPs. >> Please review the changes to Sections 4 and 6 and share your feedback, >> suggestions, and questions. >> >> Regards, >> Greg >> >> On Mon, Aug 5, 2019 at 6:03 PM Dinesh Dutt wrote: >> >>> >>> >>> On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky >>> wrote: >>> >>>> Hi Dinesh, >>>> thank you for your expedient detailed response. >>>> I believe that the ability to run BFD session up to a tenant >>>> (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this >>>> specification. >>>> I'm trying to provide precise specification on what can be used ad the >>>> destination MAC and IP addresses in the inner frame/packet as I believe >>>> that likely will help to avoid interoperability issues. >>>> I'm interested to learn some more about the "martian checking" >>>> function. As you know, martian addresses have been used as destination IP >>>> address in LSP Ping and BFD over MPLS LSP and PW. I haven't heard that any >>>> silicon feature caused problems for operators using these tools. >>>> >>> >>> Interesting. I didn't know this aspect of use with MPLS ping. Did those >>> packets ever go through a firewall though? In any case, maybe suggest the >>> use of those addresses with a statement that this is how LSP does it, but >>> that other MAC/IP pairs are possible as long as the conditions of the >>> endpoint owning the MAC/IP was honored. >>> >>> Dinesh >>> >>>> >>>> Regards, >>>> Greg >>>> >>>> On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt wrote: >>>> >>>>> Hi Greg, >>>>> >>>>> That we agree on the problem definition is the first step forward. >>>>> Your original document had my cases covered and so I was surprised by the >>>>> track this thread took. It doesn't matter, we're back on track. >>>>> >>>>> My recommendation is to not worry about specifying the precise MAC/IP >>>>> address used in the inner header. The addresses chosen MUST ensure that the >>>>> packet is trapped to the control plane of the VTEP and not escape to the >>>>> tenant if the BFD is to the VTEP. Any solution MUST also not preclude the >>>>> use of the BFD by tenant systems for that VNI. There are many ways an >>>>> implementer can choose to implement this. For example, the inner MAC >>>>> address is whatever the VTEP implementer would return if ARP'd for the IP >>>>> address used in the inner header in the given VNI. The implementer can pick >>>>> a fixed MAC address, one that they own etc. Multiple BFD sessions can be >>>>> run for testing path connectivity on more than one VNIs. Limits should be >>>>> in place to avoid overwhelming the receiver with BFD messages (you had >>>>> words about this in your currently published draft). If the VNI is >>>>> irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being >>>>> tested. the user can use any VNI active on the VTEP on which the VTEP owns >>>>> an IP address. >>>>> >>>>> I'm concerned about the use of 127/8 address only because of firewalls >>>>> or implementations that drop packets with these addresses as either the >>>>> source or destination. For example, on many merchant silicon, I don't >>>>> believe you can turn off martian checking and drops *only* for >>>>> VXLAN-encapsulated BFD packets. I don't know what the Linux kernel does >>>>> today on such packets, for example (or Hyper-V). I'd like a solution that >>>>> doesn't demand additional or new chip functionality or require additional >>>>> middle-box hole punch. >>>>> >>>>> Why do you feel you MUST to specify the MAC/IP address on the inner >>>>> packet? What am I missing here? >>>>> >>>>> Dinesh >>>>> >>>>> On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky >>>>> wrote: >>>>> >>>>>> Hi Dinesh, >>>>>> what do you see as the way forward? I agree, that the proposed text >>>>>> doesn't work for multi-VNI concurrent monitoring because these VNIs are >>>>>> tenant's VNIs. And in that case, we need to specify another mechanism to >>>>>> trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address >>>>>> must be used as the destination MAC address in the inner Ethernet frame. >>>>>> The destination IP address may be either VTEP's address of martian (I do >>>>>> prefer martian). Let me give it try: >>>>>> NEW TEXT: >>>>>> >>>>>> To monitor continuity of the path between two VTEPs, an operator MUST >>>>>> select a VNI number to be used as Management VNI. Management VNI number >>>>>> MUST NOT be one of the tenant's VNIs to prevent sending VXLAN packets >>>>>> received on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the >>>>>> default for Management VNI. [Ed.note: What we set the Destination MAC to? >>>>>> Can it be invalid MAC that MUST be ignored on receipt?] >>>>>> >>>>>> If an implementation supports concurrent monitoring of multiple VNIs, >>>>>> then the value of VNI number MAY be one of tenant's VNIs. The destination >>>>>> MAC address in the inner Ethernet frame encapsulating BFD Control packet >>>>>> MUST be MAC associated with the remote VTEP. >>>>>> The destination IP address of the inner IP packet MUST be selected >>>>>> from the range 127/8 for IPv4, and for IPv6 from the range >>>>>> 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set >>>>>> to 1. >>>>>> >>>>>> Regards, >>>>>> Greg >>>>>> >>>>>> On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: >>>>>> >>>>>>> Hi Greg, >>>>>>> >>>>>>> Thanks for your clarifications. I agree with your sentiment on why >>>>>>> you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at >>>>>>> all. All I was saying was pointing to the limitations of the use of >>>>>>> management VNI. I spoke to some operators who're running EVPN and mentioned >>>>>>> the discussion on this thread. They concur that they're using specific VNIs >>>>>>> to test connectivity over that VNI between VTEPs to ensure misconfiguration >>>>>>> doesn't lead to blackholes. My statements are based in real world operator >>>>>>> experience. And I was providing language that ensured packets didn't leak >>>>>>> across to tenants when they were destined to VTEPs. >>>>>>> >>>>>>> Dinesh >>>>>>> >>>>>>> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >>>>>>> wrote: >>>>>>> >>>>>>>> Hi Dinesh, >>>>>>>> many thanks for your detailed updates on how some implementations >>>>>>>> process VXLAN header and the inner Ethernet frame. These are very helpful >>>>>>>> in achieving the workable solution for the problem at hand. >>>>>>>> You've noted that a path between VTEPs may be monitored in the >>>>>>>> underlay network by merely establishing a BFD session. That is true, but by >>>>>>>> using BFD with VXLAN encapsulation between the pair of VTEPs we are >>>>>>>> extending the OAM domain by including, to some extent, VXLAN forwarding >>>>>>>> engine. Abstract in RFC 5880 defines the goal and the domain in which BFD >>>>>>>> protocol can detect a fault as: >>>>>>>> This document describes a protocol intended to detect faults in >>>>>>>> the >>>>>>>> bidirectional path between two forwarding engines, including >>>>>>>> interfaces, data link(s), and to the extent possible the >>>>>>>> forwarding >>>>>>>> engines themselves, with potentially very low latency. >>>>>>>> Thus, BFD in the underlay will exercise a part of IP forwarding >>>>>>>> engine while BFD with VXLAN encapsulation, ran between the same pair of >>>>>>>> VTEPs, extends the OAM domain. At the same time, defining BFD between >>>>>>>> tenant systems in outside the goal of this specification. But VXLAN BFD >>>>>>>> session between VTEPs may be useful in monitoring e2e path between tenants, >>>>>>>> as described in the update to -07: >>>>>>>> At the same time, a service layer BFD session may be used >>>>>>>> between the >>>>>>>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault >>>>>>>> management. >>>>>>>> In such case, for VTEPs BFD control packets of that session are >>>>>>>> indistinguishable from data packets. If end-to-end defect >>>>>>>> detection >>>>>>>> is realized as the set of concatenated OAM domains, e.g., VM1-1 >>>>>>>> - IP1 >>>>>>>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs >>>>>>>> SHOULD >>>>>>>> follow the procedures described in Section 6.8.17 [RFC5880]. >>>>>>>> I've attached the current working version of the draft. >>>>>>>> >>>>>>>> Regards, >>>>>>>> Greg >>>>>>>> >>>>>>>> >>>>>>>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt >>>>>>>> wrote: >>>>>>>> >>>>>>>>> What I mean is "How do you infer that it excludes the case I'm >>>>>>>>> talking about?". >>>>>>>>> >>>>>>>>> Dinesh >>>>>>>>> >>>>>>>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> The abstract reads this: " >>>>>>>>>> >>>>>>>>>> This document describes the use of the Bidirectional Forwarding >>>>>>>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>>>>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>>>>>>> >>>>>>>>>> How do you infer what you said? >>>>>>>>>> >>>>>>>>>> Dinesh >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern < >>>>>>>>>> jmh@joelhalpern.com> wrote: >>>>>>>>>> >>>>>>>>>>> I am going by what the draft says its purpose is. If you >>>>>>>>>>> (Dinesh) want >>>>>>>>>>> the draft to fulfill a different purpose, then either ask the >>>>>>>>>>> chairs to >>>>>>>>>>> take this draft back to the WG, or write a separate draft. >>>>>>>>>>> As currently written, the behavior Greg proposed meets the >>>>>>>>>>> needs, and >>>>>>>>>>> does so in a way that is consistent with VxLAN. >>>>>>>>>>> >>>>>>>>>>> Yours, >>>>>>>>>>> Joel >>>>>>>>>>> >>>>>>>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>>>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>>>>>>> reachability is >>>>>>>>>>> > determined by the underlay, I don't need VXLAN-encaped packet >>>>>>>>>>> for that. >>>>>>>>>>> > Do we agree? >>>>>>>>>>> > >>>>>>>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>>>>>>> picking any >>>>>>>>>>> > single VNI maybe fine. But is this all any network operator >>>>>>>>>>> wants? Why? >>>>>>>>>>> > In what situations has this been a problem? I suspect >>>>>>>>>>> operators also >>>>>>>>>>> > want to verify path continuity over a specific VNI. If you say >>>>>>>>>>> this is >>>>>>>>>>> > not defined by the document, I disagree because the current >>>>>>>>>>> version >>>>>>>>>>> > talks about controlling the number of BFD sessions between the >>>>>>>>>>> VTEPs >>>>>>>>>>> > (see section 3). More importantly, this is a real problem that >>>>>>>>>>> operators >>>>>>>>>>> > like to verify. >>>>>>>>>>> > >>>>>>>>>>> > Dinesh >>>>>>>>>>> > >>>>>>>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern < >>>>>>>>>>> jmh@joelhalpern.com >>>>>>>>>>> > > wrote: >>>>>>>>>>> > >>>>>>>>>>> > What is special about the management VNI is precisely that >>>>>>>>>>> it is NOT a >>>>>>>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>>>>>>> allocates VNI to >>>>>>>>>>> > tenants, and which VNI it has allocated. In contrast, it >>>>>>>>>>> does not know >>>>>>>>>>> > which IP addresses or MAC adddresses teh tenant is using >>>>>>>>>>> or may plan >>>>>>>>>>> > to use. >>>>>>>>>>> > >>>>>>>>>>> > Yours, >>>>>>>>>>> > Joel >>>>>>>>>>> > >>>>>>>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>>>>>>> > > The assumption of an IP address within any VNI is >>>>>>>>>>> suspect that way. >>>>>>>>>>> > > What's special about a single VNI, the management VNI? >>>>>>>>>>> The VTEP IP >>>>>>>>>>> > > address does not belong in reality in any VNI. >>>>>>>>>>> > > >>>>>>>>>>> > > Dinesh >>>>>>>>>>> > > >>>>>>>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>>>>>>> > >>>>>>>>>>> > > >> >>>>>>>>>>> wrote: >>>>>>>>>>> > > >>>>>>>>>>> > > Your response seems to miss two points: >>>>>>>>>>> > > >>>>>>>>>>> > > First, the problem you describe is not what the >>>>>>>>>>> document says >>>>>>>>>>> > it is >>>>>>>>>>> > > solving. To the degree it discusses it at all, the >>>>>>>>>>> document >>>>>>>>>>> > says " >>>>>>>>>>> > > In >>>>>>>>>>> > > most cases, a single BFD session is sufficient for >>>>>>>>>>> the given >>>>>>>>>>> > VTEP to >>>>>>>>>>> > > monitor the reachability of a remote VTEP, >>>>>>>>>>> regardless of the >>>>>>>>>>> > number of >>>>>>>>>>> > > VNIs in common. " >>>>>>>>>>> > > >>>>>>>>>>> > > Second, you assume the existence of an IP address >>>>>>>>>>> for a VTEP >>>>>>>>>>> > within a >>>>>>>>>>> > > VNI. As with the MAC address, the VTEP does not >>>>>>>>>>> have an IP >>>>>>>>>>> > address >>>>>>>>>>> > > within the VNI. Some implementations may have >>>>>>>>>>> created such a >>>>>>>>>>> > thing, >>>>>>>>>>> > > but >>>>>>>>>>> > > the general construct, as defined to date, does not >>>>>>>>>>> support such. >>>>>>>>>>> > > >>>>>>>>>>> > > In short, you are requiring a behavior that >>>>>>>>>>> violates the >>>>>>>>>>> > architectural >>>>>>>>>>> > > structure of overlay / underlay separation, and >>>>>>>>>>> common >>>>>>>>>>> > usage. And you >>>>>>>>>>> > > are doing so to support a use case that the working >>>>>>>>>>> group has not >>>>>>>>>>> > > indicated in the document as important. >>>>>>>>>>> > > >>>>>>>>>>> > > Yours, >>>>>>>>>>> > > Joel >>>>>>>>>>> > > >>>>>>>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>>>>>>> > > > Joel, >>>>>>>>>>> > > > >>>>>>>>>>> > > > You understood correctly. >>>>>>>>>>> > > > >>>>>>>>>>> > > > The VNIs may not share fate due to >>>>>>>>>>> misconfiguration. And I >>>>>>>>>>> > strongly >>>>>>>>>>> > > > suspect someone will want to use BFD for that >>>>>>>>>>> because its >>>>>>>>>>> > about >>>>>>>>>>> > > checking >>>>>>>>>>> > > > path continuity as stated by the draft. As long >>>>>>>>>>> as there's a >>>>>>>>>>> > > valid IP >>>>>>>>>>> > > > (because it's BFD) owned by the VTEP in that >>>>>>>>>>> VNI, you can >>>>>>>>>>> > use BFD in >>>>>>>>>>> > > > that VNI. Thats all that you need to dictate. >>>>>>>>>>> That IP address >>>>>>>>>>> > > has a MAC >>>>>>>>>>> > > > address and you can use that on the inner frame. >>>>>>>>>>> That is >>>>>>>>>>> > all normal >>>>>>>>>>> > > > VXLAN processing. The outer IP is always that of >>>>>>>>>>> the VTEP. >>>>>>>>>>> > > > >>>>>>>>>>> > > > Dinesh >>>>>>>>>>> > > > >>>>>>>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>> > > > >>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>> > >>> >>>>>>>>>>> wrote: >>>>>>>>>>> > > > >>>>>>>>>>> > > > If I am reading your various emails >>>>>>>>>>> correctly Dinesh >>>>>>>>>>> > (and I >>>>>>>>>>> > > may have >>>>>>>>>>> > > > missed something) you are trying to use the >>>>>>>>>>> MAC address >>>>>>>>>>> > > because you >>>>>>>>>>> > > > want >>>>>>>>>>> > > > to be able to send these BFD packets over >>>>>>>>>>> arbitrary VNI to >>>>>>>>>>> > > monitor the >>>>>>>>>>> > > > VNI. That is not a requirement identified >>>>>>>>>>> in the >>>>>>>>>>> > document. >>>>>>>>>>> > > It is not >>>>>>>>>>> > > > even a problem I understand, since all the >>>>>>>>>>> VNI between an >>>>>>>>>>> > > ingress and >>>>>>>>>>> > > > egress VTEP share fate. >>>>>>>>>>> > > > >>>>>>>>>>> > > > Yours, >>>>>>>>>>> > > > Joel >>>>>>>>>>> > > > >>>>>>>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>>>>>>> > > > > Thanks for verifying this. On Linux and >>>>>>>>>>> hardware >>>>>>>>>>> > routers >>>>>>>>>>> > > that I'm >>>>>>>>>>> > > > aware >>>>>>>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>>>>>>> physical MAC >>>>>>>>>>> > address is >>>>>>>>>>> > > > reused >>>>>>>>>>> > > > > across the VNIs on the VTEP. Did you >>>>>>>>>>> check on a non-VMW >>>>>>>>>>> > > device? >>>>>>>>>>> > > > This is >>>>>>>>>>> > > > > more for my own curiosity. >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > To address the general case, can we not >>>>>>>>>>> define a >>>>>>>>>>> > > well-known (or >>>>>>>>>>> > > > reserve >>>>>>>>>>> > > > > one) unicast MAC address for use with >>>>>>>>>>> VTEP? If the MAC >>>>>>>>>>> > > address is >>>>>>>>>>> > > > > configurable in BFD command, this can be >>>>>>>>>>> moot. >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > Dinesh >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh P >>>>>>>>>>> K >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > >> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > >>>> wrote: >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > I have cross checked point raised >>>>>>>>>>> about MAC address >>>>>>>>>>> > > usage. It is >>>>>>>>>>> > > > > possible that tenant could be using >>>>>>>>>>> physical MAC >>>>>>>>>>> > > address and >>>>>>>>>>> > > > when a >>>>>>>>>>> > > > > packet comes with valid VNI with a >>>>>>>>>>> MAC address >>>>>>>>>>> > that is >>>>>>>>>>> > > being >>>>>>>>>>> > > > used by >>>>>>>>>>> > > > > tenant then packet will be sent to >>>>>>>>>>> that tenant. >>>>>>>>>>> > This rules >>>>>>>>>>> > > > out the >>>>>>>>>>> > > > > fact that we could use physical MAC >>>>>>>>>>> address as >>>>>>>>>>> > inner >>>>>>>>>>> > > MAC to >>>>>>>>>>> > > > ensure >>>>>>>>>>> > > > > packets get terminated at VTEP itself. >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > Thanks >>>>>>>>>>> > > > > Santosh P K >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM >>>>>>>>>>> Santosh P K >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > >> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > > >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > >>>> >>>>>>>>>>> > > > > wrote: >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > Joel, >>>>>>>>>>> > > > > Thanks for your inputs. I >>>>>>>>>>> checked >>>>>>>>>>> > > implementation within >>>>>>>>>>> > > > > Vmware. Perhaps I should have >>>>>>>>>>> been more clear >>>>>>>>>>> > > about MAC >>>>>>>>>>> > > > address >>>>>>>>>>> > > > > space while checking internally. >>>>>>>>>>> I will cross >>>>>>>>>>> > > check again for >>>>>>>>>>> > > > > the same and get back on this >>>>>>>>>>> list. >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > Thanks >>>>>>>>>>> > > > > Santosh P K >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM >>>>>>>>>>> Joel M. >>>>>>>>>>> > Halpern >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>> > >> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>> > >>>> >>>>>>>>>>> wrote: >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > Sorry to ask a stupid >>>>>>>>>>> question. Whose >>>>>>>>>>> > > implementation? >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > The reason I ask is that as >>>>>>>>>>> far as I >>>>>>>>>>> > can tell, >>>>>>>>>>> > > since the >>>>>>>>>>> > > > > tenant does not >>>>>>>>>>> > > > > have any control access to >>>>>>>>>>> the VTEP, >>>>>>>>>>> > there is no >>>>>>>>>>> > > > reason for >>>>>>>>>>> > > > > the VTEP to >>>>>>>>>>> > > > > have a MAC address in the >>>>>>>>>>> tenant >>>>>>>>>>> > space. Yes, the >>>>>>>>>>> > > > device has >>>>>>>>>>> > > > > a physical >>>>>>>>>>> > > > > MAC address. But the tenant >>>>>>>>>>> could well be >>>>>>>>>>> > > using that MAC >>>>>>>>>>> > > > > address. Yes, >>>>>>>>>>> > > > > they would be violating the >>>>>>>>>>> Ethernet spec. >>>>>>>>>>> > > But the whole >>>>>>>>>>> > > > > point of >>>>>>>>>>> > > > > segregation is not to care >>>>>>>>>>> about such >>>>>>>>>>> > issues. >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > On the other hand, if you >>>>>>>>>>> tell me that >>>>>>>>>>> > the VMWare >>>>>>>>>>> > > > > implementation has an >>>>>>>>>>> > > > > Ethernet address that is part >>>>>>>>>>> of the tenant >>>>>>>>>>> > > space, well, >>>>>>>>>>> > > > > they made up >>>>>>>>>>> > > > > this particular game. >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > Yours, >>>>>>>>>>> > > > > Joel >>>>>>>>>>> > > > > >>>>>>>>>>> > > > > On 7/31/2019 1:44 PM, Santosh >>>>>>>>>>> P K wrote: >>>>>>>>>>> > > > > > I have checked with >>>>>>>>>>> implementation >>>>>>>>>>> > in data >>>>>>>>>>> > > path. >>>>>>>>>>> > > > When we >>>>>>>>>>> > > > > receive a >>>>>>>>>>> > > > > > packet with valid VNI then >>>>>>>>>>> lookup >>>>>>>>>>> > for MAC will >>>>>>>>>>> > > > happen and >>>>>>>>>>> > > > > it is VTEP own >>>>>>>>>>> > > > > > MAC then it will be >>>>>>>>>>> trapped to control >>>>>>>>>>> > > plane for >>>>>>>>>>> > > > > processing. I think we >>>>>>>>>>> > > > > > can have following options >>>>>>>>>>> > > > > > 1. Optional managment VNI >>>>>>>>>>> > > > > > 2. Mandatory inner MAC set >>>>>>>>>>> to VTEP mac >>>>>>>>>>> > > > > > 3. Inner IP TTL set to 1 >>>>>>>>>>> to avoid >>>>>>>>>>> > > forwarding of packet >>>>>>>>>>> > > > > via inner IP >>>>>>>>>>> > > > > > address. >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Thoughts? >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Thansk >>>>>>>>>>> > > > > > Santosh P K >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>>>>>> 9:20 AM Greg >>>>>>>>>>> > Mirsky >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>> > >>>>>>>>>> gregimirsky@gmail.com> >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>>> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com> >>>>>>>>>>> > >>>>>>>>>> gregimirsky@gmail.com>>>> >>>>>>>>>>> > > > > > >>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>> > >> >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > >>>>> wrote: >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Hi Dinesh, >>>>>>>>>>> > > > > > thank you for your >>>>>>>>>>> consideration >>>>>>>>>>> > of the >>>>>>>>>>> > > > proposal and >>>>>>>>>>> > > > > questions. What >>>>>>>>>>> > > > > > would you see as the >>>>>>>>>>> scope of >>>>>>>>>>> > testing the >>>>>>>>>>> > > > > connectivity for the >>>>>>>>>>> > > > > > specific VNI? If it is >>>>>>>>>>> > > tenant-to-tenant, then >>>>>>>>>>> > > > VTEPs >>>>>>>>>>> > > > > will treat these >>>>>>>>>>> > > > > > packets as regular >>>>>>>>>>> user frames. More >>>>>>>>>>> > > likely, these >>>>>>>>>>> > > > > could be Layer 2 >>>>>>>>>>> > > > > > OAM, e.g. CCM frames. >>>>>>>>>>> The reason >>>>>>>>>>> > to use >>>>>>>>>>> > > 127/8 for >>>>>>>>>>> > > > > IPv4, and >>>>>>>>>>> > > > > > >>>>>>>>>>> 0:0:0:0:0:FFFF:7F00:0/104 for >>>>>>>>>>> > IPv6 is >>>>>>>>>>> > > to safeguard >>>>>>>>>>> > > > > from leaking >>>>>>>>>>> > > > > > Ethernet frames with >>>>>>>>>>> BFD Control >>>>>>>>>>> > packet >>>>>>>>>>> > > to a >>>>>>>>>>> > > > tenant. >>>>>>>>>>> > > > > > You've suggested using >>>>>>>>>>> a MAC >>>>>>>>>>> > address to >>>>>>>>>>> > > trap the >>>>>>>>>>> > > > > control packet at >>>>>>>>>>> > > > > > VTEP. What that >>>>>>>>>>> address could be? We >>>>>>>>>>> > > had proposed >>>>>>>>>>> > > > > using the >>>>>>>>>>> > > > > > dedicated MAC and >>>>>>>>>>> VTEP's MAC and >>>>>>>>>>> > both >>>>>>>>>>> > > raised >>>>>>>>>>> > > > concerns >>>>>>>>>>> > > > > among VXLAN >>>>>>>>>>> > > > > > experts. The idea of >>>>>>>>>>> using >>>>>>>>>>> > Management >>>>>>>>>>> > > VNI may >>>>>>>>>>> > > > be more >>>>>>>>>>> > > > > acceptable >>>>>>>>>>> > > > > > based on its >>>>>>>>>>> similarity to the >>>>>>>>>>> > practice >>>>>>>>>>> > > of using >>>>>>>>>>> > > > > Management VLAN. >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Regards, >>>>>>>>>>> > > > > > Greg >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > On Wed, Jul 31, 2019 >>>>>>>>>>> at 12:03 PM >>>>>>>>>>> > Dinesh >>>>>>>>>>> > > Dutt >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>> > >> >>>>>>>>>>> > > > >>>>>>>>>> didutt@gmail.com> >>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>> > >>> >>>>>>>>>>> > > > > > >>>>>>>>>> didutt@gmail.com >>>>>>>>>>> > >>>>>>>>>>> > > > >>>>>>>>>>> > > > >>>>>>>>>> didutt@gmail.com> >>>>>>>>>>> > >> >>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>> > > > >>>>>>>>>> didutt@gmail.com> >>>>>>>>>>> > >>>>> >>>>>>>>>>> > > > > wrote: >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Hi Greg, >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > As long as the >>>>>>>>>>> inner MAC >>>>>>>>>>> > address is >>>>>>>>>>> > > such >>>>>>>>>>> > > > that the >>>>>>>>>>> > > > > packet is >>>>>>>>>>> > > > > > trapped to the >>>>>>>>>>> CPU, it should be >>>>>>>>>>> > > fine for >>>>>>>>>>> > > > use as >>>>>>>>>>> > > > > an inner MAC is >>>>>>>>>>> > > > > > it not? Stating >>>>>>>>>>> that is >>>>>>>>>>> > better than >>>>>>>>>>> > > trying to >>>>>>>>>>> > > > > force a management >>>>>>>>>>> > > > > > VNI. What if >>>>>>>>>>> someone wants >>>>>>>>>>> > to test >>>>>>>>>>> > > > connectivity >>>>>>>>>>> > > > > on a specific >>>>>>>>>>> > > > > > VNI? I would not >>>>>>>>>>> pick a >>>>>>>>>>> > loopback IP >>>>>>>>>>> > > > address for >>>>>>>>>>> > > > > this since that >>>>>>>>>>> > > > > > address range is >>>>>>>>>>> host/node local >>>>>>>>>>> > > only. Is >>>>>>>>>>> > > > there a >>>>>>>>>>> > > > > reason you're >>>>>>>>>>> > > > > > not using the VTEP >>>>>>>>>>> IP as the >>>>>>>>>>> > inner IP >>>>>>>>>>> > > > address ? >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Dinesh >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > On Wed, Jul 31, >>>>>>>>>>> 2019 at 5:48 AM >>>>>>>>>>> > > Greg Mirsky >>>>>>>>>>> > > > > > < >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>> > >> >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > >>> >>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>> > >> >>>>>>>>>>> > > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>> > > > >>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>> > >>>>> wrote: >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Dear All, >>>>>>>>>>> > > > > > thank you for >>>>>>>>>>> your comments, >>>>>>>>>>> > > > suggestions on >>>>>>>>>>> > > > > this issue, >>>>>>>>>>> > > > > > probably the >>>>>>>>>>> most >>>>>>>>>>> > challenging >>>>>>>>>>> > > for this >>>>>>>>>>> > > > > specification. In the >>>>>>>>>>> > > > > > course of our >>>>>>>>>>> discussions, >>>>>>>>>>> > > we've agreed to >>>>>>>>>>> > > > > abandon the >>>>>>>>>>> > > > > > request to >>>>>>>>>>> allocate the >>>>>>>>>>> > > dedicated MAC >>>>>>>>>>> > > > address >>>>>>>>>>> > > > > to be used as >>>>>>>>>>> > > > > > the >>>>>>>>>>> destination MAC >>>>>>>>>>> > address in >>>>>>>>>>> > > the inner >>>>>>>>>>> > > > > Ethernet frame. >>>>>>>>>>> > > > > > Also, earlier >>>>>>>>>>> using VNI >>>>>>>>>>> > 0 was >>>>>>>>>>> > > changed from >>>>>>>>>>> > > > > mandatory to one >>>>>>>>>>> > > > > > of the options >>>>>>>>>>> an >>>>>>>>>>> > > implementation may >>>>>>>>>>> > > > offer to >>>>>>>>>>> > > > > an operator. >>>>>>>>>>> > > > > > The most recent >>>>>>>>>>> > discussion was >>>>>>>>>>> > > whether >>>>>>>>>>> > > > VTEP's >>>>>>>>>>> > > > > MAC address >>>>>>>>>>> > > > > > might be used >>>>>>>>>>> as the >>>>>>>>>>> > > destination MAC >>>>>>>>>>> > > > address >>>>>>>>>>> > > > > in the inner >>>>>>>>>>> > > > > > Ethernet >>>>>>>>>>> frame. As I >>>>>>>>>>> > recall it, the >>>>>>>>>>> > > > comments >>>>>>>>>>> > > > > from VXLAN >>>>>>>>>>> > > > > > experts >>>>>>>>>>> equally split >>>>>>>>>>> > with one >>>>>>>>>>> > > for it >>>>>>>>>>> > > > and one >>>>>>>>>>> > > > > against. Hence >>>>>>>>>>> > > > > > I would like >>>>>>>>>>> to propose >>>>>>>>>>> > a new >>>>>>>>>>> > > text to >>>>>>>>>>> > > > resolve >>>>>>>>>>> > > > > the issue. The >>>>>>>>>>> > > > > > idea is to let >>>>>>>>>>> an >>>>>>>>>>> > operator select >>>>>>>>>>> > > > Management >>>>>>>>>>> > > > > VNI and use >>>>>>>>>>> > > > > > that VNI in >>>>>>>>>>> VXLAN >>>>>>>>>>> > encapsulation >>>>>>>>>>> > > of BFD >>>>>>>>>>> > > > > Control packets: >>>>>>>>>>> > > > > > NEW TEXT: >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > An >>>>>>>>>>> operator MUST >>>>>>>>>>> > select a VNI >>>>>>>>>>> > > > number to >>>>>>>>>>> > > > > be used as >>>>>>>>>>> > > > > > Management >>>>>>>>>>> VNI. VXLAN >>>>>>>>>>> > > packet for >>>>>>>>>>> > > > > Management VNI MUST NOT >>>>>>>>>>> > > > > > be sent to >>>>>>>>>>> a tenant. VNI >>>>>>>>>>> > > number 1 is >>>>>>>>>>> > > > > RECOMMENDED as the >>>>>>>>>>> > > > > > default for >>>>>>>>>>> > Management VNI. >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > With that new >>>>>>>>>>> text, what >>>>>>>>>>> > can be the >>>>>>>>>>> > > > value of >>>>>>>>>>> > > > > the destination >>>>>>>>>>> > > > > > MAC in the >>>>>>>>>>> inner Ethernet? I >>>>>>>>>>> > > tend to >>>>>>>>>>> > > > believe >>>>>>>>>>> > > > > that it can be >>>>>>>>>>> > > > > > anything and >>>>>>>>>>> ignored by the >>>>>>>>>>> > > reciever VTEP. >>>>>>>>>>> > > > > Also, if the >>>>>>>>>>> > > > > > trapping is >>>>>>>>>>> based on VNI >>>>>>>>>>> > > number, the >>>>>>>>>>> > > > > destination IP address >>>>>>>>>>> > > > > > of the inner >>>>>>>>>>> IP packet >>>>>>>>>>> > can from >>>>>>>>>>> > > the range >>>>>>>>>>> > > > > 127/8 for IPv4, >>>>>>>>>>> > > > > > and for IPv6 >>>>>>>>>>> from the range >>>>>>>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. And >>>>>>>>>>> > > > > > lastly, the >>>>>>>>>>> TTL to be >>>>>>>>>>> > set to 1 (no >>>>>>>>>>> > > > change here). >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Much >>>>>>>>>>> appreciate your >>>>>>>>>>> > comments, >>>>>>>>>>> > > > questions, and >>>>>>>>>>> > > > > suggestions. >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > > Best regards, >>>>>>>>>>> > > > > > Greg >>>>>>>>>>> > > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> > > > >>>>>>>>>>> > > >>>>>>>>>>> > >>>>>>>>>>> >>>>>>>>>> --00000000000055a598058fa2fab4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dinesh, thank you for your help, much appreciated.
Hi Joel and Sridhar,
could you please check if the up= dated text on the inner Ethernet frame addressed your concern.
<= br>
On Wed,= Aug 7, 2019 at 2:25 PM Dinesh Dutt <didutt@gmail.com> wrote:
Looks god to me Greg. Thank you for = your hard work in this,

Dinesh

=
On Wed, Au= g 7, 2019 at 9:25 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh, Joel,= Sridhar, et al.,
much appreciate the help you've=C2=A0given me sha= ring your expertise. I hope that the updates you will find in the attached = diff and the working copy of the draft be closer to the acceptable solution= for VTEP-VTEP BFD. Please note, that I'll shortly start a new discussi= on thread to address one of Carlos's questions on the ambiguity of the = text on multiple concurrent sessions between the same pair of VTEPs.
<= div>Please review the changes to Sections 4 and 6 and share your feedback, = suggestions, and questions.

Regards,
Gre= g

On Mon, Aug 5, 2019 at 6:03 PM Dinesh Dutt <didutt@gmail.com> wrote:
<= blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l= eft:1px solid rgb(204,204,204);padding-left:1ex">


On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky <gregimirsky@gmail.com> w= rote:
Hi Dinesh,
thank you for your expedient detailed response.
I believe that the ability to run BFD session up to a tenant (VTEP-V= TEP-tenant or tenant-tenant) was never in jeopardy from this specification.=
I'm trying to provide precise specification on what can be u= sed ad the destination MAC and IP addresses in the inner frame/packet as I = believe that likely will help to avoid interoperability issues.
I= 'm interested to learn some more about the "martian checking"= function. As you know, martian addresses have been used as destination IP = address in LSP Ping and BFD over MPLS LSP and PW. I haven't heard that = any silicon feature caused problems for operators using these tools.
<= /div>

Interesting. I didn't know this a= spect of use with MPLS ping. Did those packets ever go through a firewall t= hough? In any case, maybe suggest the use of those addresses with a stateme= nt that this is how LSP does it, but that other MAC/IP pairs are possible a= s long as the conditions of the endpoint owning the MAC/IP was honored.

Dinesh

Regards,
Greg

On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt <didutt@gmail.com> wrote:
Hi Greg= ,

That we agree on the problem definition is the f= irst step forward. Your original document had my cases covered and so I was= surprised by the track this thread took. It doesn't matter, we're = back on track.

My recommendation is to not worry a= bout specifying the precise MAC/IP address used in the inner header. The ad= dresses chosen MUST ensure that the packet is trapped to the control plane = of the VTEP and not escape to the tenant if the BFD is to the VTEP. Any sol= ution MUST also not preclude the use of the BFD by tenant systems for that = VNI. There are many ways an implementer can choose to implement this. For e= xample, the inner MAC address is whatever the VTEP implementer would return= if ARP'd for the IP address used in the inner header in the given VNI.= The implementer can pick a fixed MAC address, one that they own etc. Multi= ple BFD sessions can be run for testing path connectivity on more than one = VNIs. Limits should be in place to avoid overwhelming the receiver with BFD= messages (you had words about this in your currently published draft).=C2= =A0 If the VNI is irrelevant in the test i.e. only the VXLAN pipe at the VT= EP is being tested. the user can use any VNI active on the VTEP on which th= e VTEP owns an IP address.

I'm concerned about= the use of 127/8 address only because of firewalls or implementations that= drop packets with these addresses as either the source or destination. For= example, on many merchant silicon, I don't believe you can turn off ma= rtian checking and drops *only* for VXLAN-encapsulated BFD packets. I don&#= 39;t know what the Linux kernel does today on such packets, for example (or= Hyper-V). I'd like a solution that doesn't demand additional or ne= w chip functionality or require additional middle-box hole punch.

Why do you feel you MUST to specify the MAC/IP address on t= he inner packet? What am I missing here?

Dines= h

On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky <gregimirsky@gmail.com> wro= te:
Hi Dinesh,
what do you see as the way forward? I = agree, that the proposed text doesn't work for multi-VNI concurrent mon= itoring because these VNIs are tenant's VNIs. And in that case, we need= to specify another mechanism to trap the BFD Control packet at VTEP. It se= ems that VTEP's Ethernet address must be used as the destination MAC ad= dress in the inner Ethernet frame. The destination IP address may be either= VTEP's address of martian (I do prefer martian). Let me give it=C2=A0 = try:
NEW TEXT:
To monitor cont= inuity of the path between two VTEPs, an operator MUST select a VNI number = to be used as Management VNI. Management VNI number MUST NOT be one of the = tenant's VNIs to prevent sending VXLAN packets received on Management V= NI to a tenant. VNI number 1 is RECOMMENDED as the default for Management V= NI. [Ed.note: What we set the Destination MAC to? Can it be invalid MAC tha= t MUST be ignored on receipt?]
<= div>If an implementation supports concurrent monitoring of multiple VNIs, t= hen the value of VNI number MAY be one of tenant's VNIs. The destinatio= n MAC address in the inner Ethernet frame encapsulating BFD Control packet = MUST be MAC associated with the remote VTEP.=C2=A0
The destinatio= n IP address of the inner IP packet MUST be selected from the range 127/8 f= or IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/104. The TTL val= ue in the inner IP header MUST be set to 1.

Regards,
Greg=C2=A0

On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt &l= t;didutt@gmail.com> wrote:
Hi Greg,

Thanks for your clarif= ications. I agree with your sentiment on why you're running BFD over VX= LAN between VTEPs. I wasn't arguing against it at all. All I was saying= was pointing to the limitations of the use of management VNI. I spoke to s= ome operators who're running EVPN and mentioned the discussion on this = thread. They concur that they're using specific VNIs to test connectivi= ty over that VNI between VTEPs to ensure misconfiguration doesn't lead = to blackholes. My statements are based in real world operator experience. A= nd I was providing language that ensured packets didn't leak across to = tenants when they were destined to VTEPs.

Dinesh

On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky <gregimirsky@gmail.com> wrote= :
Hi Dinesh,
many thanks for your detailed updates on how some impleme= ntations process VXLAN header and the inner Ethernet frame. These are very = helpful in achieving the workable solution for the problem at hand.
You've noted that a path between VTEPs may be monitored in the under= lay network by merely establishing a BFD session. That is true, but by usin= g BFD with VXLAN encapsulation between the pair of VTEPs we are extending t= he OAM domain by including, to some extent, VXLAN forwarding engine. Abstra= ct in RFC 5880 defines the goal and the domain in which BFD protocol can de= tect a fault as:
=C2=A0 =C2=A0This document describes a protocol = intended to detect faults in the
=C2=A0 =C2=A0bidirectional path between= two forwarding engines, including
=C2=A0 =C2=A0interfaces, data link(s)= , and to the extent possible the forwarding
=C2=A0 =C2=A0engines themsel= ves, with potentially very low latency.=C2=A0
Thus, BFD in th= e underlay will exercise a part of IP forwarding engine while BFD with VXLA= N encapsulation, ran between the same pair of VTEPs, extends the OAM domain= . At the same time, defining BFD between tenant systems in outside the goal= of this specification. But VXLAN BFD session between VTEPs may be useful i= n monitoring e2e path between tenants, as described in the update to -07:
=C2=A0 =C2=A0At the same time, a service layer BFD session may be = used between the
=C2=A0 =C2=A0tenants of VTEPs IP1 and IP2 to provide en= d-to-end fault management.
=C2=A0 =C2=A0In such case, for VTEPs BFD cont= rol packets of that session are
=C2=A0 =C2=A0indistinguishable from data= packets.=C2=A0 If end-to-end defect detection
=C2=A0 =C2=A0is realized = as the set of concatenated OAM domains, e.g., VM1-1 - IP1
=C2=A0 =C2=A0-= - IP2 - VM2-1, then the BFD session over VXLAN between VTEPs SHOULD
=C2= =A0 =C2=A0follow the procedures described in Section 6.8.17 [RFC5880].
<= /div>
I've attached the current working version of the draft.
=

Regards,
Greg


<= div class=3D"gmail_quote">
On Fri, Aug= 2, 2019 at 5:43 PM Dinesh Dutt <didutt@gmail.com> wrote:
What I mean is "= ;How do you infer that it excludes the case I'm talking about?". <= br>

Dinesh

On Fri, Aug 2, 2019 at 5:41 PM= Dinesh Dutt <didu= tt@gmail.com> wrote:
The abstract reads this: "
This d=
ocument describes the use of the Bidirectional Forwarding
   Detection (BFD) protocol in point-to-point Virtual eXtensible Local
   Area Network (VXLAN) tunnels forming up an overlay network."
How do you infer w=
hat you said?

Dinesh

On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halp= ern <jmh@joelha= lpern.com> wrote:
I am going by what the draft says its purpose is.=C2=A0 If you (= Dinesh) want
the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft.
As currently written, the behavior Greg proposed meets the needs, and
does so in a way that is consistent with VxLAN.

Yours,
Joel

On 8/2/2019 8:30 PM, Dinesh Dutt wrote:
> What is the stated purpose of this BFD session? The VTEP reachability = is
> determined by the underlay, I don't need VXLAN-encaped packet for = that.
> Do we agree?
>
> If I want to test the VXLAN encap/decap functionality alone, picking a= ny
> single VNI maybe fine. But is this all any network operator wants? Why= ?
> In what situations has this been a problem? I suspect operators also <= br> > want to verify path continuity over a specific VNI. If you say this is=
> not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs <= br> > (see section 3). More importantly, this is a real problem that operato= rs
> like to verify.
>
> Dinesh
>
> On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jm= h@joelhalpern.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0What is special about the management VNI is precise= ly that it is NOT a
>=C2=A0 =C2=A0 =C2=A0tenant VNI.=C2=A0 The VxLAN administration does kno= w how it allocates VNI to
>=C2=A0 =C2=A0 =C2=A0tenants, and which VNI it has allocated.=C2=A0 In c= ontrast, it does not know
>=C2=A0 =C2=A0 =C2=A0which IP addresses or MAC adddresses teh tenant is = using or may plan
>=C2=A0 =C2=A0 =C2=A0to use.
>
>=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0Joel
>
>=C2=A0 =C2=A0 =C2=A0On 8/2/2019 6:41 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 > The assumption of an IP address within any VN= I is suspect that way.
>=C2=A0 =C2=A0 =C2=A0 > What's special about a single VNI, the ma= nagement VNI? The VTEP IP
>=C2=A0 =C2=A0 =C2=A0 > address does not belong in reality in any VNI= .
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halper= n
>=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>= wrote:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Your response seems to mis= s two points:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0First, the problem you des= cribe is not what the document says
>=C2=A0 =C2=A0 =C2=A0it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0solving.=C2=A0 To the degr= ee it discusses it at all, the document
>=C2=A0 =C2=A0 =C2=A0says "
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 =C2=A0In
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0most cases, a single BFD s= ession is sufficient for the given
>=C2=A0 =C2=A0 =C2=A0VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the reachability o= f a remote VTEP, regardless of the
>=C2=A0 =C2=A0 =C2=A0number of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNIs in common. "
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Second, you assume the exi= stence of an IP address for a VTEP
>=C2=A0 =C2=A0 =C2=A0within a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI.=C2=A0 As with the MAC= address, the VTEP does not have an IP
>=C2=A0 =C2=A0 =C2=A0address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0within the VNI.=C2=A0 Some= implementations may have created such a
>=C2=A0 =C2=A0 =C2=A0thing,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0but
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the general construct, as = defined to date, does not support such.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0In short, you are requirin= g a behavior that violates the
>=C2=A0 =C2=A0 =C2=A0architectural
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0structure of overlay / und= erlay separation, and common
>=C2=A0 =C2=A0 =C2=A0usage.=C2=A0 And you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0are doing so to support a = use case that the working group has not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0indicated in the document = as important.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0On 8/2/2019 5:01 PM, Dines= h Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > You understood corre= ctly.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > The VNIs may not sha= re fate due to misconfiguration. And I
>=C2=A0 =C2=A0 =C2=A0strongly
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > suspect someone will= want to use BFD for that because its
>=C2=A0 =C2=A0 =C2=A0about
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0checking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > path continuity as s= tated by the draft. As long as there's a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0valid IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > (because it's BF= D) owned by the VTEP in that VNI, you can
>=C2=A0 =C2=A0 =C2=A0use BFD in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > that VNI. Thats all = that you need to dictate.=C2=A0 That IP address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0has a MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > address and you can = use that on the inner frame. That is
>=C2=A0 =C2=A0 =C2=A0all normal
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > VXLAN processing. Th= e outer IP is always that of the VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 = at 11:03 AM Joel M. Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com= >
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com &= lt;mailto:jmh@joel= halpern.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>> w= rote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0I= f I am reading your various emails correctly Dinesh
>=C2=A0 =C2=A0 =C2=A0(and I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0may have
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0m= issed something) you are trying to use the MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0because you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= ant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= o be able to send these BFD packets over arbitrary VNI to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= NI.=C2=A0 That is not a requirement identified in the
>=C2=A0 =C2=A0 =C2=A0document.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0It is not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= ven a problem I understand, since all the VNI between an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0ingress and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= gress VTEP share fate.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Y= ours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0J= oel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0O= n 8/2/2019 1:44 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Thanks for verifying this. On Linux and hardware
>=C2=A0 =C2=A0 =C2=A0routers
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0that I'm
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ware
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > of (Cisco circa 2012 and Cumulus), the physical MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eused
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > across the VNIs on the VTEP. Did you check on a non-VMW
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0device?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0T= his is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > more for my own curiosity.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > To address the general case, can we not define a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0well-known (or
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eserve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > one) unicast MAC address for use with VTEP? If the MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > configurable in BFD command, this can be moot.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > <= santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0I have cross checked point raised about MAC address=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0usage. It is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0possible that tenant could be using physical MAC >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= hen a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packet comes with valid VNI with a MAC address
>=C2=A0 =C2=A0 =C2=A0that is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0being
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= sed by
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0tenant then packet will be sent to that tenant.
>=C2=A0 =C2=A0 =C2=A0This rules
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ut the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0fact that we could use physical MAC address as
>=C2=A0 =C2=A0 =C2=A0inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0MAC to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= nsure
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packets get terminated at VTEP itself.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 11:00 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0<santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks for your inputs.= I checked
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation within
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Vmware. Perhaps I should have been mo= re clear
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0about MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0space while checking internally. I wi= ll cross
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0check again for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the same and get back on this list. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 10:54 AM Joel= M.
>=C2=A0 =C2=A0 =C2=A0Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:jmh@joel= halpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>>&g= t; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sorry to ask a stupid q= uestion.=C2=A0 Whose
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The reason I ask is tha= t as far as I
>=C2=A0 =C2=A0 =C2=A0can tell,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0since the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tenant does not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have any control access= to the VTEP,
>=C2=A0 =C2=A0 =C2=A0there is no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eason for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have a MAC address in t= he tenant
>=C2=A0 =C2=A0 =C2=A0space.=C2=A0 Yes, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0d= evice has
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a physical
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address.=C2=A0 But = the tenant could well be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0using that MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address.=C2=A0 Yes,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they would be violating= the Ethernet spec.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0But the whole
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0point of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0segregation is not to c= are about such
>=C2=A0 =C2=A0 =C2=A0issues.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On the other hand, if y= ou tell me that
>=C2=A0 =C2=A0 =C2=A0the VMWare
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0implementation has an >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet address that i= s part of the tenant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0space, well,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they made up
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this particular game. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 7/31/2019 1:44 PM, S= antosh P K wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > I have checked wi= th implementation
>=C2=A0 =C2=A0 =C2=A0in data
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0path.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0W= hen we
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0receive a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > packet with valid= VNI then lookup
>=C2=A0 =C2=A0 =C2=A0for MAC will
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0h= appen and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it is VTEP own
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > MAC then it will = be trapped to control
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0plane for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0processing. I think we<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > can have followin= g options
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 1. Optional manag= ment VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 2. Mandatory inne= r MAC set to VTEP mac
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 3. Inner IP TTL s= et to 1 to avoid
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0forwarding of packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0via inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > address.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thoughts?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thansk
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > On Wed, Jul 31, 2= 019 at 9:20 AM Greg
>=C2=A0 =C2=A0 =C2=A0Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>&g= t;>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > <mailto:gregimirsky@gmail.com<= /a>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0thank you for your consideration
>=C2=A0 =C2=A0 =C2=A0of the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0p= roposal and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0questions. What
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0would you see as the scope of
>=C2=A0 =C2=A0 =C2=A0testing the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0connectivity for the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0specific VNI? If it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tenant-to-tenant, then
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEPs
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0will treat these
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0packets as regular user frames. More
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0likely, these
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0could be Layer 2
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0OAM, e.g. CCM frames. The reason
>=C2=A0 =C2=A0 =C2=A0to use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0127/8 for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0IPv4, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A00:0:0:0:0:FFFF:7F00:0/104 for
>=C2=A0 =C2=A0 =C2=A0IPv6 is
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Ethernet frames with BFD Control
>=C2=A0 =C2=A0 =C2=A0packet
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0You've suggested using a MAC
>=C2=A0 =C2=A0 =C2=A0address to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trap the
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0VTEP. What that address could be? We
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0had proposed
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0using the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0dedicated MAC and VTEP's MAC and
>=C2=A0 =C2=A0 =C2=A0both
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= oncerns
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0among VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0experts. The idea of using
>=C2=A0 =C2=A0 =C2=A0Management
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI may
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0based on its similarity to the
>=C2=A0 =C2=A0 =C2=A0practice
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VLAN.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0On Wed, Jul 31, 2019 at 12:03 PM
>=C2=A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Dutt
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com> <mailto:didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0<mailto:didutt@= gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>>>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Hi Greg,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0As long as the inner MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0such
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= hat the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0packet is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0trapped to the CPU, it should be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0fine for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= se as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an inner MAC is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0it not? Stating that is
>=C2=A0 =C2=A0 =C2=A0better than
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trying to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0force a management
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0VNI. What if someone wants
>=C2=A0 =C2=A0 =C2=A0to test
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= onnectivity
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0on a specific
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0VNI? I would not pick a
>=C2=A0 =C2=A0 =C2=A0loopback IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this since that
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0address range is host/node local
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0only. Is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= here a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reason you're
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0not using the VTEP IP as the
>=C2=A0 =C2=A0 =C2=A0inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress ?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Greg Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0s= uggestions on
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this issue,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most
>=C2=A0 =C2=A0 =C2=A0challenging
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for this
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0specification. In the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussions,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0we've agreed to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0abandon the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0dedicated MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0to be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC
>=C2=A0 =C2=A0 =C2=A0address in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI
>=C2=A0 =C2=A0 =C2=A00 was
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation may
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ffer to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an operator.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent
>=C2=A0 =C2=A0 =C2=A0discussion was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0whether
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEP's
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0destination MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= omments
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split
>=C2=A0 =C2=A0 =C2=A0with one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for it
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= nd one
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose
>=C2=A0 =C2=A0 =C2=A0a new
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0text to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= esolve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the issue. The
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>=C2=A0 =C2=A0 =C2=A0operator select
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0M= anagement
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI and use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN
>=C2=A0 =C2=A0 =C2=A0encapsulation
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of BFD
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Control packets:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operator MUST
>=C2=A0 =C2=A0 =C2=A0select a VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0n= umber to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI. VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0packet for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI MUST NOT=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent to a tenant. VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number 1 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default for
>=C2=A0 =C2=A0 =C2=A0Management VNI.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, what
>=C2=A0 =C2=A0 =C2=A0can be the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0v= alue of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethernet? I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tend to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= elieve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that it can be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0reciever VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, if the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0destination IP address<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet
>=C2=A0 =C2=A0 =C2=A0can from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/1= 04. And
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be
>=C2=A0 =C2=A0 =C2=A0set to 1 (no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= hange here).
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your
>=C2=A0 =C2=A0 =C2=A0comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0q= uestions, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0suggestions.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >
>
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Sridhar" To: Greg Mirsky , Dinesh Dutt CC: "Joel M. Halpern" , Santosh P K , rtg-bfd WG , "bfd-chairs@ietf.org" , Martin Vigoureux , "draft-ietf-bfd-vxlan@ietf.org" Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP Thread-Topic: BFD over VXLAN: Trapping BFD Control packet at VTEP Thread-Index: AQHVR55Kbr6323BXX0G7gROqeJDYMKbk48UAgAAEqoCAABd1gIAAArcAgAABtwCAAxt8gIABlEFLgAF6G4CAAfYgAIAAD0CAgAAgrQCAAAIPAIACk74AgABT/gCAAavrAIAADeSA Date: Fri, 9 Aug 2019 06:46:42 +0000 Message-ID: References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/10.18.0.190414 authentication-results: spf=none (sender IP is ) smtp.mailfrom=tsridhar@vmware.com; x-originating-ip: [2601:647:4802:65d0:c928:d8cf:f9c6:66ef] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 508f4df8-1bb8-43d7-5fe1-08d71c9556a0 x-microsoft-antispam: BCL:0; PCL:0; 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SMTP id z2mr6619393wmf.92.1565760259905; Tue, 13 Aug 2019 22:24:19 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Santosh P K Date: Wed, 14 Aug 2019 10:54:08 +0530 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Greg Mirsky Cc: Dinesh Dutt , "Joel M. Halpern" , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="000000000000185ddd05900cf806" Archived-At: X-Mailman-Approved-At: Wed, 14 Aug 2019 07:28:24 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Aug 2019 05:24:28 -0000 --000000000000185ddd05900cf806 Content-Type: text/plain; charset="UTF-8" Greg, Thanks for updated version of document. Here are few comments on new draft. Section 4: Destination MAC: This MUST NOT be of one of tenant's MAC addresses. The MAC address MAY be configured, or it MAY be learned via a control plane protocol. The details of how the MAC address is obtained are outside the scope of this document. I think we may need to give background on why we are saying MAC address MUST not be one of tenant's MAC address. Like in this thread we have discussed one of the tenant could have borrowed the same VTEP mac address and we if we have to use BFD then we need to avoid that conflict to ensure BFD packets get observed in the VTEP itself. Should we add a section before 4 to set that context so that above text makes more sense in that context? IP header: Destination IP: IP address MUST NOT be of one of tenant's IP addresses. IP address MAY be selected from the range 127/8 for IPv4, for IPv6 - from the range 0:0:0:0:0:FFFF:7F00:0/104. TTL: MUST be set to 1 to ensure that the BFD packet is not routed within the L3 underlay network. I think we have added some text to address Sridhar comments on why TTL MUST be 1 and dest IP address MUST be 127/8 range. I see that text is missing now. Section 5.1: For such packets, the BFD session MUST be identified using the following three-tuples of fields of the inner header: the source IP, the destination IP, and the source UDP port number present in the IP header carried by the payload of the packet in VXLAN encapsulation. If BFD packet is received with non-zero Your Discriminator, then BFD session MUST be demultiplexed only with Your Discriminator as the key. Just with 3 tuple we will not be able to demux packet. We need to consider VNI as well if we have multiple BFD session between same pair of VTEP. Thanks Santosh P K On Fri, Aug 9, 2019 at 4:27 AM Greg Mirsky wrote: > Dinesh, thank you for your help, much appreciated. > > Hi Joel and Sridhar, > could you please check if the updated text on the inner Ethernet frame > addressed your concern. > > On Wed, Aug 7, 2019 at 2:25 PM Dinesh Dutt wrote: > >> Looks god to me Greg. Thank you for your hard work in this, >> >> Dinesh >> >> On Wed, Aug 7, 2019 at 9:25 AM Greg Mirsky wrote: >> >>> Hi Dinesh, Joel, Sridhar, et al., >>> much appreciate the help you've given me sharing your expertise. I hope >>> that the updates you will find in the attached diff and the working copy of >>> the draft be closer to the acceptable solution for VTEP-VTEP BFD. Please >>> note, that I'll shortly start a new discussion thread to address one of >>> Carlos's questions on the ambiguity of the text on multiple concurrent >>> sessions between the same pair of VTEPs. >>> Please review the changes to Sections 4 and 6 and share your feedback, >>> suggestions, and questions. >>> >>> Regards, >>> Greg >>> >>> On Mon, Aug 5, 2019 at 6:03 PM Dinesh Dutt wrote: >>> >>>> >>>> >>>> On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky >>>> wrote: >>>> >>>>> Hi Dinesh, >>>>> thank you for your expedient detailed response. >>>>> I believe that the ability to run BFD session up to a tenant >>>>> (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this >>>>> specification. >>>>> I'm trying to provide precise specification on what can be used ad the >>>>> destination MAC and IP addresses in the inner frame/packet as I believe >>>>> that likely will help to avoid interoperability issues. >>>>> I'm interested to learn some more about the "martian checking" >>>>> function. As you know, martian addresses have been used as destination IP >>>>> address in LSP Ping and BFD over MPLS LSP and PW. I haven't heard that any >>>>> silicon feature caused problems for operators using these tools. >>>>> >>>> >>>> Interesting. I didn't know this aspect of use with MPLS ping. Did those >>>> packets ever go through a firewall though? In any case, maybe suggest the >>>> use of those addresses with a statement that this is how LSP does it, but >>>> that other MAC/IP pairs are possible as long as the conditions of the >>>> endpoint owning the MAC/IP was honored. >>>> >>>> Dinesh >>>> >>>>> >>>>> Regards, >>>>> Greg >>>>> >>>>> On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt wrote: >>>>> >>>>>> Hi Greg, >>>>>> >>>>>> That we agree on the problem definition is the first step forward. >>>>>> Your original document had my cases covered and so I was surprised by the >>>>>> track this thread took. It doesn't matter, we're back on track. >>>>>> >>>>>> My recommendation is to not worry about specifying the precise MAC/IP >>>>>> address used in the inner header. The addresses chosen MUST ensure that the >>>>>> packet is trapped to the control plane of the VTEP and not escape to the >>>>>> tenant if the BFD is to the VTEP. Any solution MUST also not preclude the >>>>>> use of the BFD by tenant systems for that VNI. There are many ways an >>>>>> implementer can choose to implement this. For example, the inner MAC >>>>>> address is whatever the VTEP implementer would return if ARP'd for the IP >>>>>> address used in the inner header in the given VNI. The implementer can pick >>>>>> a fixed MAC address, one that they own etc. Multiple BFD sessions can be >>>>>> run for testing path connectivity on more than one VNIs. Limits should be >>>>>> in place to avoid overwhelming the receiver with BFD messages (you had >>>>>> words about this in your currently published draft). If the VNI is >>>>>> irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being >>>>>> tested. the user can use any VNI active on the VTEP on which the VTEP owns >>>>>> an IP address. >>>>>> >>>>>> I'm concerned about the use of 127/8 address only because of >>>>>> firewalls or implementations that drop packets with these addresses as >>>>>> either the source or destination. For example, on many merchant silicon, I >>>>>> don't believe you can turn off martian checking and drops *only* for >>>>>> VXLAN-encapsulated BFD packets. I don't know what the Linux kernel does >>>>>> today on such packets, for example (or Hyper-V). I'd like a solution that >>>>>> doesn't demand additional or new chip functionality or require additional >>>>>> middle-box hole punch. >>>>>> >>>>>> Why do you feel you MUST to specify the MAC/IP address on the inner >>>>>> packet? What am I missing here? >>>>>> >>>>>> Dinesh >>>>>> >>>>>> On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky >>>>>> wrote: >>>>>> >>>>>>> Hi Dinesh, >>>>>>> what do you see as the way forward? I agree, that the proposed text >>>>>>> doesn't work for multi-VNI concurrent monitoring because these VNIs are >>>>>>> tenant's VNIs. And in that case, we need to specify another mechanism to >>>>>>> trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address >>>>>>> must be used as the destination MAC address in the inner Ethernet frame. >>>>>>> The destination IP address may be either VTEP's address of martian (I do >>>>>>> prefer martian). Let me give it try: >>>>>>> NEW TEXT: >>>>>>> >>>>>>> To monitor continuity of the path between two VTEPs, an operator >>>>>>> MUST select a VNI number to be used as Management VNI. Management VNI >>>>>>> number MUST NOT be one of the tenant's VNIs to prevent sending VXLAN >>>>>>> packets received on Management VNI to a tenant. VNI number 1 is RECOMMENDED >>>>>>> as the default for Management VNI. [Ed.note: What we set the Destination >>>>>>> MAC to? Can it be invalid MAC that MUST be ignored on receipt?] >>>>>>> >>>>>>> If an implementation supports concurrent monitoring of multiple >>>>>>> VNIs, then the value of VNI number MAY be one of tenant's VNIs. The >>>>>>> destination MAC address in the inner Ethernet frame encapsulating BFD >>>>>>> Control packet MUST be MAC associated with the remote VTEP. >>>>>>> The destination IP address of the inner IP packet MUST be selected >>>>>>> from the range 127/8 for IPv4, and for IPv6 from the range >>>>>>> 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set >>>>>>> to 1. >>>>>>> >>>>>>> Regards, >>>>>>> Greg >>>>>>> >>>>>>> On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt wrote: >>>>>>> >>>>>>>> Hi Greg, >>>>>>>> >>>>>>>> Thanks for your clarifications. I agree with your sentiment on why >>>>>>>> you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at >>>>>>>> all. All I was saying was pointing to the limitations of the use of >>>>>>>> management VNI. I spoke to some operators who're running EVPN and mentioned >>>>>>>> the discussion on this thread. They concur that they're using specific VNIs >>>>>>>> to test connectivity over that VNI between VTEPs to ensure misconfiguration >>>>>>>> doesn't lead to blackholes. My statements are based in real world operator >>>>>>>> experience. And I was providing language that ensured packets didn't leak >>>>>>>> across to tenants when they were destined to VTEPs. >>>>>>>> >>>>>>>> Dinesh >>>>>>>> >>>>>>>> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >>>>>>>> wrote: >>>>>>>> >>>>>>>>> Hi Dinesh, >>>>>>>>> many thanks for your detailed updates on how some implementations >>>>>>>>> process VXLAN header and the inner Ethernet frame. These are very helpful >>>>>>>>> in achieving the workable solution for the problem at hand. >>>>>>>>> You've noted that a path between VTEPs may be monitored in the >>>>>>>>> underlay network by merely establishing a BFD session. That is true, but by >>>>>>>>> using BFD with VXLAN encapsulation between the pair of VTEPs we are >>>>>>>>> extending the OAM domain by including, to some extent, VXLAN forwarding >>>>>>>>> engine. Abstract in RFC 5880 defines the goal and the domain in which BFD >>>>>>>>> protocol can detect a fault as: >>>>>>>>> This document describes a protocol intended to detect faults in >>>>>>>>> the >>>>>>>>> bidirectional path between two forwarding engines, including >>>>>>>>> interfaces, data link(s), and to the extent possible the >>>>>>>>> forwarding >>>>>>>>> engines themselves, with potentially very low latency. >>>>>>>>> Thus, BFD in the underlay will exercise a part of IP forwarding >>>>>>>>> engine while BFD with VXLAN encapsulation, ran between the same pair of >>>>>>>>> VTEPs, extends the OAM domain. At the same time, defining BFD between >>>>>>>>> tenant systems in outside the goal of this specification. But VXLAN BFD >>>>>>>>> session between VTEPs may be useful in monitoring e2e path between tenants, >>>>>>>>> as described in the update to -07: >>>>>>>>> At the same time, a service layer BFD session may be used >>>>>>>>> between the >>>>>>>>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault >>>>>>>>> management. >>>>>>>>> In such case, for VTEPs BFD control packets of that session are >>>>>>>>> indistinguishable from data packets. If end-to-end defect >>>>>>>>> detection >>>>>>>>> is realized as the set of concatenated OAM domains, e.g., VM1-1 >>>>>>>>> - IP1 >>>>>>>>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs >>>>>>>>> SHOULD >>>>>>>>> follow the procedures described in Section 6.8.17 [RFC5880]. >>>>>>>>> I've attached the current working version of the draft. >>>>>>>>> >>>>>>>>> Regards, >>>>>>>>> Greg >>>>>>>>> >>>>>>>>> >>>>>>>>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> What I mean is "How do you infer that it excludes the case I'm >>>>>>>>>> talking about?". >>>>>>>>>> >>>>>>>>>> Dinesh >>>>>>>>>> >>>>>>>>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt >>>>>>>>>> wrote: >>>>>>>>>> >>>>>>>>>>> The abstract reads this: " >>>>>>>>>>> >>>>>>>>>>> This document describes the use of the Bidirectional Forwarding >>>>>>>>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>>>>>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>>>>>>>> >>>>>>>>>>> How do you infer what you said? >>>>>>>>>>> >>>>>>>>>>> Dinesh >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern < >>>>>>>>>>> jmh@joelhalpern.com> wrote: >>>>>>>>>>> >>>>>>>>>>>> I am going by what the draft says its purpose is. If you >>>>>>>>>>>> (Dinesh) want >>>>>>>>>>>> the draft to fulfill a different purpose, then either ask the >>>>>>>>>>>> chairs to >>>>>>>>>>>> take this draft back to the WG, or write a separate draft. >>>>>>>>>>>> As currently written, the behavior Greg proposed meets the >>>>>>>>>>>> needs, and >>>>>>>>>>>> does so in a way that is consistent with VxLAN. >>>>>>>>>>>> >>>>>>>>>>>> Yours, >>>>>>>>>>>> Joel >>>>>>>>>>>> >>>>>>>>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>>>>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>>>>>>>> reachability is >>>>>>>>>>>> > determined by the underlay, I don't need VXLAN-encaped packet >>>>>>>>>>>> for that. >>>>>>>>>>>> > Do we agree? >>>>>>>>>>>> > >>>>>>>>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>>>>>>>> picking any >>>>>>>>>>>> > single VNI maybe fine. But is this all any network operator >>>>>>>>>>>> wants? Why? >>>>>>>>>>>> > In what situations has this been a problem? I suspect >>>>>>>>>>>> operators also >>>>>>>>>>>> > want to verify path continuity over a specific VNI. If you >>>>>>>>>>>> say this is >>>>>>>>>>>> > not defined by the document, I disagree because the current >>>>>>>>>>>> version >>>>>>>>>>>> > talks about controlling the number of BFD sessions between >>>>>>>>>>>> the VTEPs >>>>>>>>>>>> > (see section 3). More importantly, this is a real problem >>>>>>>>>>>> that operators >>>>>>>>>>>> > like to verify. >>>>>>>>>>>> > >>>>>>>>>>>> > Dinesh >>>>>>>>>>>> > >>>>>>>>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern < >>>>>>>>>>>> jmh@joelhalpern.com >>>>>>>>>>>> > > wrote: >>>>>>>>>>>> > >>>>>>>>>>>> > What is special about the management VNI is precisely >>>>>>>>>>>> that it is NOT a >>>>>>>>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>>>>>>>> allocates VNI to >>>>>>>>>>>> > tenants, and which VNI it has allocated. In contrast, it >>>>>>>>>>>> does not know >>>>>>>>>>>> > which IP addresses or MAC adddresses teh tenant is using >>>>>>>>>>>> or may plan >>>>>>>>>>>> > to use. >>>>>>>>>>>> > >>>>>>>>>>>> > Yours, >>>>>>>>>>>> > Joel >>>>>>>>>>>> > >>>>>>>>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>>>>>>>> > > The assumption of an IP address within any VNI is >>>>>>>>>>>> suspect that way. >>>>>>>>>>>> > > What's special about a single VNI, the management VNI? >>>>>>>>>>>> The VTEP IP >>>>>>>>>>>> > > address does not belong in reality in any VNI. >>>>>>>>>>>> > > >>>>>>>>>>>> > > Dinesh >>>>>>>>>>>> > > >>>>>>>>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> jmh@joelhalpern.com>>> wrote: >>>>>>>>>>>> > > >>>>>>>>>>>> > > Your response seems to miss two points: >>>>>>>>>>>> > > >>>>>>>>>>>> > > First, the problem you describe is not what the >>>>>>>>>>>> document says >>>>>>>>>>>> > it is >>>>>>>>>>>> > > solving. To the degree it discusses it at all, >>>>>>>>>>>> the document >>>>>>>>>>>> > says " >>>>>>>>>>>> > > In >>>>>>>>>>>> > > most cases, a single BFD session is sufficient for >>>>>>>>>>>> the given >>>>>>>>>>>> > VTEP to >>>>>>>>>>>> > > monitor the reachability of a remote VTEP, >>>>>>>>>>>> regardless of the >>>>>>>>>>>> > number of >>>>>>>>>>>> > > VNIs in common. " >>>>>>>>>>>> > > >>>>>>>>>>>> > > Second, you assume the existence of an IP address >>>>>>>>>>>> for a VTEP >>>>>>>>>>>> > within a >>>>>>>>>>>> > > VNI. As with the MAC address, the VTEP does not >>>>>>>>>>>> have an IP >>>>>>>>>>>> > address >>>>>>>>>>>> > > within the VNI. Some implementations may have >>>>>>>>>>>> created such a >>>>>>>>>>>> > thing, >>>>>>>>>>>> > > but >>>>>>>>>>>> > > the general construct, as defined to date, does >>>>>>>>>>>> not support such. >>>>>>>>>>>> > > >>>>>>>>>>>> > > In short, you are requiring a behavior that >>>>>>>>>>>> violates the >>>>>>>>>>>> > architectural >>>>>>>>>>>> > > structure of overlay / underlay separation, and >>>>>>>>>>>> common >>>>>>>>>>>> > usage. And you >>>>>>>>>>>> > > are doing so to support a use case that the >>>>>>>>>>>> working group has not >>>>>>>>>>>> > > indicated in the document as important. >>>>>>>>>>>> > > >>>>>>>>>>>> > > Yours, >>>>>>>>>>>> > > Joel >>>>>>>>>>>> > > >>>>>>>>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>>>>>>>> > > > Joel, >>>>>>>>>>>> > > > >>>>>>>>>>>> > > > You understood correctly. >>>>>>>>>>>> > > > >>>>>>>>>>>> > > > The VNIs may not share fate due to >>>>>>>>>>>> misconfiguration. And I >>>>>>>>>>>> > strongly >>>>>>>>>>>> > > > suspect someone will want to use BFD for that >>>>>>>>>>>> because its >>>>>>>>>>>> > about >>>>>>>>>>>> > > checking >>>>>>>>>>>> > > > path continuity as stated by the draft. As long >>>>>>>>>>>> as there's a >>>>>>>>>>>> > > valid IP >>>>>>>>>>>> > > > (because it's BFD) owned by the VTEP in that >>>>>>>>>>>> VNI, you can >>>>>>>>>>>> > use BFD in >>>>>>>>>>>> > > > that VNI. Thats all that you need to dictate. >>>>>>>>>>>> That IP address >>>>>>>>>>>> > > has a MAC >>>>>>>>>>>> > > > address and you can use that on the inner >>>>>>>>>>>> frame. That is >>>>>>>>>>>> > all normal >>>>>>>>>>>> > > > VXLAN processing. The outer IP is always that >>>>>>>>>>>> of the VTEP. >>>>>>>>>>>> > > > >>>>>>>>>>>> > > > Dinesh >>>>>>>>>>>> > > > >>>>>>>>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>> > > > >>>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>>> > >>> >>>>>>>>>>>> wrote: >>>>>>>>>>>> > > > >>>>>>>>>>>> > > > If I am reading your various emails >>>>>>>>>>>> correctly Dinesh >>>>>>>>>>>> > (and I >>>>>>>>>>>> > > may have >>>>>>>>>>>> > > > missed something) you are trying to use the >>>>>>>>>>>> MAC address >>>>>>>>>>>> > > because you >>>>>>>>>>>> > > > want >>>>>>>>>>>> > > > to be able to send these BFD packets over >>>>>>>>>>>> arbitrary VNI to >>>>>>>>>>>> > > monitor the >>>>>>>>>>>> > > > VNI. That is not a requirement identified >>>>>>>>>>>> in the >>>>>>>>>>>> > document. >>>>>>>>>>>> > > It is not >>>>>>>>>>>> > > > even a problem I understand, since all the >>>>>>>>>>>> VNI between an >>>>>>>>>>>> > > ingress and >>>>>>>>>>>> > > > egress VTEP share fate. >>>>>>>>>>>> > > > >>>>>>>>>>>> > > > Yours, >>>>>>>>>>>> > > > Joel >>>>>>>>>>>> > > > >>>>>>>>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>>>>>>>> > > > > Thanks for verifying this. On Linux and >>>>>>>>>>>> hardware >>>>>>>>>>>> > routers >>>>>>>>>>>> > > that I'm >>>>>>>>>>>> > > > aware >>>>>>>>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>>>>>>>> physical MAC >>>>>>>>>>>> > address is >>>>>>>>>>>> > > > reused >>>>>>>>>>>> > > > > across the VNIs on the VTEP. Did you >>>>>>>>>>>> check on a non-VMW >>>>>>>>>>>> > > device? >>>>>>>>>>>> > > > This is >>>>>>>>>>>> > > > > more for my own curiosity. >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > To address the general case, can we not >>>>>>>>>>>> define a >>>>>>>>>>>> > > well-known (or >>>>>>>>>>>> > > > reserve >>>>>>>>>>>> > > > > one) unicast MAC address for use with >>>>>>>>>>>> VTEP? If the MAC >>>>>>>>>>>> > > address is >>>>>>>>>>>> > > > > configurable in BFD command, this can be >>>>>>>>>>>> moot. >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > Dinesh >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh >>>>>>>>>>>> P K >>>>>>>>>>>> > > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > >> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > >>>> wrote: >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > I have cross checked point raised >>>>>>>>>>>> about MAC address >>>>>>>>>>>> > > usage. It is >>>>>>>>>>>> > > > > possible that tenant could be using >>>>>>>>>>>> physical MAC >>>>>>>>>>>> > > address and >>>>>>>>>>>> > > > when a >>>>>>>>>>>> > > > > packet comes with valid VNI with a >>>>>>>>>>>> MAC address >>>>>>>>>>>> > that is >>>>>>>>>>>> > > being >>>>>>>>>>>> > > > used by >>>>>>>>>>>> > > > > tenant then packet will be sent to >>>>>>>>>>>> that tenant. >>>>>>>>>>>> > This rules >>>>>>>>>>>> > > > out the >>>>>>>>>>>> > > > > fact that we could use physical MAC >>>>>>>>>>>> address as >>>>>>>>>>>> > inner >>>>>>>>>>>> > > MAC to >>>>>>>>>>>> > > > ensure >>>>>>>>>>>> > > > > packets get terminated at VTEP >>>>>>>>>>>> itself. >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > Thanks >>>>>>>>>>>> > > > > Santosh P K >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM >>>>>>>>>>>> Santosh P K >>>>>>>>>>>> > > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > >> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > > >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > >>>> >>>>>>>>>>>> > > > > wrote: >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > Joel, >>>>>>>>>>>> > > > > Thanks for your inputs. I >>>>>>>>>>>> checked >>>>>>>>>>>> > > implementation within >>>>>>>>>>>> > > > > Vmware. Perhaps I should have >>>>>>>>>>>> been more clear >>>>>>>>>>>> > > about MAC >>>>>>>>>>>> > > > address >>>>>>>>>>>> > > > > space while checking internally. >>>>>>>>>>>> I will cross >>>>>>>>>>>> > > check again for >>>>>>>>>>>> > > > > the same and get back on this >>>>>>>>>>>> list. >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > Thanks >>>>>>>>>>>> > > > > Santosh P K >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 AM >>>>>>>>>>>> Joel M. >>>>>>>>>>>> > Halpern >>>>>>>>>>>> > > > > >>>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>>> > >>>>>>>>>>> >>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>>> > >>>> >>>>>>>>>>>> wrote: >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > Sorry to ask a stupid >>>>>>>>>>>> question. Whose >>>>>>>>>>>> > > implementation? >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > The reason I ask is that as >>>>>>>>>>>> far as I >>>>>>>>>>>> > can tell, >>>>>>>>>>>> > > since the >>>>>>>>>>>> > > > > tenant does not >>>>>>>>>>>> > > > > have any control access to >>>>>>>>>>>> the VTEP, >>>>>>>>>>>> > there is no >>>>>>>>>>>> > > > reason for >>>>>>>>>>>> > > > > the VTEP to >>>>>>>>>>>> > > > > have a MAC address in the >>>>>>>>>>>> tenant >>>>>>>>>>>> > space. Yes, the >>>>>>>>>>>> > > > device has >>>>>>>>>>>> > > > > a physical >>>>>>>>>>>> > > > > MAC address. But the tenant >>>>>>>>>>>> could well be >>>>>>>>>>>> > > using that MAC >>>>>>>>>>>> > > > > address. Yes, >>>>>>>>>>>> > > > > they would be violating the >>>>>>>>>>>> Ethernet spec. >>>>>>>>>>>> > > But the whole >>>>>>>>>>>> > > > > point of >>>>>>>>>>>> > > > > segregation is not to care >>>>>>>>>>>> about such >>>>>>>>>>>> > issues. >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > On the other hand, if you >>>>>>>>>>>> tell me that >>>>>>>>>>>> > the VMWare >>>>>>>>>>>> > > > > implementation has an >>>>>>>>>>>> > > > > Ethernet address that is >>>>>>>>>>>> part of the tenant >>>>>>>>>>>> > > space, well, >>>>>>>>>>>> > > > > they made up >>>>>>>>>>>> > > > > this particular game. >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > Yours, >>>>>>>>>>>> > > > > Joel >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > > On 7/31/2019 1:44 PM, >>>>>>>>>>>> Santosh P K wrote: >>>>>>>>>>>> > > > > > I have checked with >>>>>>>>>>>> implementation >>>>>>>>>>>> > in data >>>>>>>>>>>> > > path. >>>>>>>>>>>> > > > When we >>>>>>>>>>>> > > > > receive a >>>>>>>>>>>> > > > > > packet with valid VNI >>>>>>>>>>>> then lookup >>>>>>>>>>>> > for MAC will >>>>>>>>>>>> > > > happen and >>>>>>>>>>>> > > > > it is VTEP own >>>>>>>>>>>> > > > > > MAC then it will be >>>>>>>>>>>> trapped to control >>>>>>>>>>>> > > plane for >>>>>>>>>>>> > > > > processing. I think we >>>>>>>>>>>> > > > > > can have following options >>>>>>>>>>>> > > > > > 1. Optional managment VNI >>>>>>>>>>>> > > > > > 2. Mandatory inner MAC >>>>>>>>>>>> set to VTEP mac >>>>>>>>>>>> > > > > > 3. Inner IP TTL set to 1 >>>>>>>>>>>> to avoid >>>>>>>>>>>> > > forwarding of packet >>>>>>>>>>>> > > > > via inner IP >>>>>>>>>>>> > > > > > address. >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Thoughts? >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Thansk >>>>>>>>>>>> > > > > > Santosh P K >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>>>>>>> 9:20 AM Greg >>>>>>>>>>>> > Mirsky >>>>>>>>>>>> > > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>> > >>>>>>>>>>> gregimirsky@gmail.com> >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com> >>>>>>>>>>>> > >>>>>>>>>>> gregimirsky@gmail.com>>>> >>>>>>>>>>>> > > > > > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >> >>>>>>>>>>>> > > > > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > >>>>> wrote: >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Hi Dinesh, >>>>>>>>>>>> > > > > > thank you for your >>>>>>>>>>>> consideration >>>>>>>>>>>> > of the >>>>>>>>>>>> > > > proposal and >>>>>>>>>>>> > > > > questions. What >>>>>>>>>>>> > > > > > would you see as the >>>>>>>>>>>> scope of >>>>>>>>>>>> > testing the >>>>>>>>>>>> > > > > connectivity for the >>>>>>>>>>>> > > > > > specific VNI? If it is >>>>>>>>>>>> > > tenant-to-tenant, then >>>>>>>>>>>> > > > VTEPs >>>>>>>>>>>> > > > > will treat these >>>>>>>>>>>> > > > > > packets as regular >>>>>>>>>>>> user frames. More >>>>>>>>>>>> > > likely, these >>>>>>>>>>>> > > > > could be Layer 2 >>>>>>>>>>>> > > > > > OAM, e.g. CCM frames. >>>>>>>>>>>> The reason >>>>>>>>>>>> > to use >>>>>>>>>>>> > > 127/8 for >>>>>>>>>>>> > > > > IPv4, and >>>>>>>>>>>> > > > > > >>>>>>>>>>>> 0:0:0:0:0:FFFF:7F00:0/104 for >>>>>>>>>>>> > IPv6 is >>>>>>>>>>>> > > to safeguard >>>>>>>>>>>> > > > > from leaking >>>>>>>>>>>> > > > > > Ethernet frames with >>>>>>>>>>>> BFD Control >>>>>>>>>>>> > packet >>>>>>>>>>>> > > to a >>>>>>>>>>>> > > > tenant. >>>>>>>>>>>> > > > > > You've suggested >>>>>>>>>>>> using a MAC >>>>>>>>>>>> > address to >>>>>>>>>>>> > > trap the >>>>>>>>>>>> > > > > control packet at >>>>>>>>>>>> > > > > > VTEP. What that >>>>>>>>>>>> address could be? We >>>>>>>>>>>> > > had proposed >>>>>>>>>>>> > > > > using the >>>>>>>>>>>> > > > > > dedicated MAC and >>>>>>>>>>>> VTEP's MAC and >>>>>>>>>>>> > both >>>>>>>>>>>> > > raised >>>>>>>>>>>> > > > concerns >>>>>>>>>>>> > > > > among VXLAN >>>>>>>>>>>> > > > > > experts. The idea of >>>>>>>>>>>> using >>>>>>>>>>>> > Management >>>>>>>>>>>> > > VNI may >>>>>>>>>>>> > > > be more >>>>>>>>>>>> > > > > acceptable >>>>>>>>>>>> > > > > > based on its >>>>>>>>>>>> similarity to the >>>>>>>>>>>> > practice >>>>>>>>>>>> > > of using >>>>>>>>>>>> > > > > Management VLAN. >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Regards, >>>>>>>>>>>> > > > > > Greg >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > On Wed, Jul 31, 2019 >>>>>>>>>>>> at 12:03 PM >>>>>>>>>>>> > Dinesh >>>>>>>>>>>> > > Dutt >>>>>>>>>>>> > > > > >>>>>>>>>>> > >>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>> > >> >>>>>>>>>>>> > > > >>>>>>>>>>> didutt@gmail.com> >>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>> > >>> >>>>>>>>>>>> > > > > > >>>>>>>>>>> didutt@gmail.com >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> >> >>>>>>>>>>>> > > > >>>>>>>>>>> didutt@gmail.com> >>>>>>>>>>>> > >> >>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>> > > > >>>>>>>>>>> didutt@gmail.com> >>>>>>>>>>>> > >>>>> >>>>>>>>>>>> > > > > wrote: >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Hi Greg, >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > As long as the >>>>>>>>>>>> inner MAC >>>>>>>>>>>> > address is >>>>>>>>>>>> > > such >>>>>>>>>>>> > > > that the >>>>>>>>>>>> > > > > packet is >>>>>>>>>>>> > > > > > trapped to the >>>>>>>>>>>> CPU, it should be >>>>>>>>>>>> > > fine for >>>>>>>>>>>> > > > use as >>>>>>>>>>>> > > > > an inner MAC is >>>>>>>>>>>> > > > > > it not? Stating >>>>>>>>>>>> that is >>>>>>>>>>>> > better than >>>>>>>>>>>> > > trying to >>>>>>>>>>>> > > > > force a management >>>>>>>>>>>> > > > > > VNI. What if >>>>>>>>>>>> someone wants >>>>>>>>>>>> > to test >>>>>>>>>>>> > > > connectivity >>>>>>>>>>>> > > > > on a specific >>>>>>>>>>>> > > > > > VNI? I would not >>>>>>>>>>>> pick a >>>>>>>>>>>> > loopback IP >>>>>>>>>>>> > > > address for >>>>>>>>>>>> > > > > this since that >>>>>>>>>>>> > > > > > address range is >>>>>>>>>>>> host/node local >>>>>>>>>>>> > > only. Is >>>>>>>>>>>> > > > there a >>>>>>>>>>>> > > > > reason you're >>>>>>>>>>>> > > > > > not using the >>>>>>>>>>>> VTEP IP as the >>>>>>>>>>>> > inner IP >>>>>>>>>>>> > > > address ? >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Dinesh >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > On Wed, Jul 31, >>>>>>>>>>>> 2019 at 5:48 AM >>>>>>>>>>>> > > Greg Mirsky >>>>>>>>>>>> > > > > > < >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >> >>>>>>>>>>>> > > > > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > >>> >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >> >>>>>>>>>>>> > > > > >>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>> > > > >>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>> > >>>>> wrote: >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Dear All, >>>>>>>>>>>> > > > > > thank you for >>>>>>>>>>>> your comments, >>>>>>>>>>>> > > > suggestions on >>>>>>>>>>>> > > > > this issue, >>>>>>>>>>>> > > > > > probably the >>>>>>>>>>>> most >>>>>>>>>>>> > challenging >>>>>>>>>>>> > > for this >>>>>>>>>>>> > > > > specification. In the >>>>>>>>>>>> > > > > > course of our >>>>>>>>>>>> discussions, >>>>>>>>>>>> > > we've agreed to >>>>>>>>>>>> > > > > abandon the >>>>>>>>>>>> > > > > > request to >>>>>>>>>>>> allocate the >>>>>>>>>>>> > > dedicated MAC >>>>>>>>>>>> > > > address >>>>>>>>>>>> > > > > to be used as >>>>>>>>>>>> > > > > > the >>>>>>>>>>>> destination MAC >>>>>>>>>>>> > address in >>>>>>>>>>>> > > the inner >>>>>>>>>>>> > > > > Ethernet frame. >>>>>>>>>>>> > > > > > Also, earlier >>>>>>>>>>>> using VNI >>>>>>>>>>>> > 0 was >>>>>>>>>>>> > > changed from >>>>>>>>>>>> > > > > mandatory to one >>>>>>>>>>>> > > > > > of the >>>>>>>>>>>> options an >>>>>>>>>>>> > > implementation may >>>>>>>>>>>> > > > offer to >>>>>>>>>>>> > > > > an operator. >>>>>>>>>>>> > > > > > The most >>>>>>>>>>>> recent >>>>>>>>>>>> > discussion was >>>>>>>>>>>> > > whether >>>>>>>>>>>> > > > VTEP's >>>>>>>>>>>> > > > > MAC address >>>>>>>>>>>> > > > > > might be used >>>>>>>>>>>> as the >>>>>>>>>>>> > > destination MAC >>>>>>>>>>>> > > > address >>>>>>>>>>>> > > > > in the inner >>>>>>>>>>>> > > > > > Ethernet >>>>>>>>>>>> frame. As I >>>>>>>>>>>> > recall it, the >>>>>>>>>>>> > > > comments >>>>>>>>>>>> > > > > from VXLAN >>>>>>>>>>>> > > > > > experts >>>>>>>>>>>> equally split >>>>>>>>>>>> > with one >>>>>>>>>>>> > > for it >>>>>>>>>>>> > > > and one >>>>>>>>>>>> > > > > against. Hence >>>>>>>>>>>> > > > > > I would like >>>>>>>>>>>> to propose >>>>>>>>>>>> > a new >>>>>>>>>>>> > > text to >>>>>>>>>>>> > > > resolve >>>>>>>>>>>> > > > > the issue. The >>>>>>>>>>>> > > > > > idea is to >>>>>>>>>>>> let an >>>>>>>>>>>> > operator select >>>>>>>>>>>> > > > Management >>>>>>>>>>>> > > > > VNI and use >>>>>>>>>>>> > > > > > that VNI in >>>>>>>>>>>> VXLAN >>>>>>>>>>>> > encapsulation >>>>>>>>>>>> > > of BFD >>>>>>>>>>>> > > > > Control packets: >>>>>>>>>>>> > > > > > NEW TEXT: >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > An >>>>>>>>>>>> operator MUST >>>>>>>>>>>> > select a VNI >>>>>>>>>>>> > > > number to >>>>>>>>>>>> > > > > be used as >>>>>>>>>>>> > > > > > >>>>>>>>>>>> Management VNI. VXLAN >>>>>>>>>>>> > > packet for >>>>>>>>>>>> > > > > Management VNI MUST NOT >>>>>>>>>>>> > > > > > be sent >>>>>>>>>>>> to a tenant. VNI >>>>>>>>>>>> > > number 1 is >>>>>>>>>>>> > > > > RECOMMENDED as the >>>>>>>>>>>> > > > > > default >>>>>>>>>>>> for >>>>>>>>>>>> > Management VNI. >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > With that new >>>>>>>>>>>> text, what >>>>>>>>>>>> > can be the >>>>>>>>>>>> > > > value of >>>>>>>>>>>> > > > > the destination >>>>>>>>>>>> > > > > > MAC in the >>>>>>>>>>>> inner Ethernet? I >>>>>>>>>>>> > > tend to >>>>>>>>>>>> > > > believe >>>>>>>>>>>> > > > > that it can be >>>>>>>>>>>> > > > > > anything and >>>>>>>>>>>> ignored by the >>>>>>>>>>>> > > reciever VTEP. >>>>>>>>>>>> > > > > Also, if the >>>>>>>>>>>> > > > > > trapping is >>>>>>>>>>>> based on VNI >>>>>>>>>>>> > > number, the >>>>>>>>>>>> > > > > destination IP address >>>>>>>>>>>> > > > > > of the inner >>>>>>>>>>>> IP packet >>>>>>>>>>>> > can from >>>>>>>>>>>> > > the range >>>>>>>>>>>> > > > > 127/8 for IPv4, >>>>>>>>>>>> > > > > > and for IPv6 >>>>>>>>>>>> from the range >>>>>>>>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. >>>>>>>>>>>> And >>>>>>>>>>>> > > > > > lastly, the >>>>>>>>>>>> TTL to be >>>>>>>>>>>> > set to 1 (no >>>>>>>>>>>> > > > change here). >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Much >>>>>>>>>>>> appreciate your >>>>>>>>>>>> > comments, >>>>>>>>>>>> > > > questions, and >>>>>>>>>>>> > > > > suggestions. >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > > Best regards, >>>>>>>>>>>> > > > > > Greg >>>>>>>>>>>> > > > > > >>>>>>>>>>>> > > > > >>>>>>>>>>>> > > > >>>>>>>>>>>> > > >>>>>>>>>>>> > >>>>>>>>>>>> >>>>>>>>>>> --000000000000185ddd05900cf806 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Greg,
=C2=A0 =C2=A0Thanks for updated version of docum= ent. Here are few comments on new draft.

Section 4= :
Destination MAC: This MUST NOT be of one of tenant's MAC
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 addresses.=C2=A0 The MAC addr= ess MAY be configured, or it MAY be
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 learned via a control plane p= rotocol.=C2=A0 The details of how the
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 MAC address is obtained are o= utside the scope of this document.

= I think we may need to give background on why we are saying MAC address MUS= T not be one of tenant's MAC address. Like in this thread we have discu= ssed one of the tenant could have borrowed the same VTEP mac address and we= if we have to use BFD then we need to avoid that conflict to ensure BFD pa= ckets get observed in the VTEP itself. Should we add a section before 4 to = set that context so that above text makes more sense in that context?

=

<= div style=3D"color:rgb(0,0,0);font-family:"Courier New",Courier,m= onospace,arial,sans-serif;font-size:14px;white-space:pre-wrap"> =C2=A0= =C2=A0=C2=A0IP header:
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Destinati= on IP: IP address MUST NOT be of one of tenant's IP
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 addresses.=C2=A0 IP address M= AY be selected from the range 127/8 for
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 IPv4, for IPv6 - from the ran= ge 0:0:0:0:0:FFFF:7F00:0/104.

<= /div>
=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 TTL: MUST be set to 1 to ensure = that the BFD packet is not
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 routed within the L3 underlay= network.


I think we have added some text to address Sridhar comments on why TT= L MUST be 1 and dest IP address MUST be 127/8 range. I see that text is mis= sing now.

Section 5.1:
For such packets, the BFD session MUST be identified
=C2=A0=C2=A0 using the following three-tuples of fields of the i= nner header: the
=C2=A0=C2=A0 source IP, the destination IP, and the source UDP p= ort number present
=C2=A0=C2=A0 in the IP header carried by the payload of the pack= et in VXLAN
=C2=A0=C2=A0 encapsulation.=C2=A0 If BFD packet is received with= non-zero Your
Discriminator, then BFD session MUST be demultiplexed only wi= th Your
=C2=A0=C2=A0 Discriminator as the key.

= Just with 3 tuple we will not be able to demux packet. We need to consider = VNI as well if we have multiple BFD session between same pair of VTEP.


=
Thanks
Santosh P = K

On Fri, Aug 9, 2019 at 4:27 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Dinesh, thank you= for your help, much appreciated.

Hi Joel and Sridhar,
could you please check if the updated text on the inner Ethernet f= rame addressed your concern.

On Wed, Aug 7, 2019 at 2:25 PM Dinesh Dut= t <didutt@gmail.co= m> wrote:
Looks god to me Greg. Thank you for your hard work i= n this,

Dinesh

On Wed, Aug 7, 2019 at 9:2= 5 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh, Joel, Sridhar, et al.= ,
much appreciate the help you've=C2=A0given me sharing your expert= ise. I hope that the updates you will find in the attached diff and the wor= king copy of the draft be closer to the acceptable solution for VTEP-VTEP B= FD. Please note, that I'll shortly start a new discussion thread to add= ress one of Carlos's questions on the ambiguity of the text on multiple= concurrent sessions between the same pair of VTEPs.
Please revie= w the changes to Sections 4 and 6 and share your feedback, suggestions, and= questions.

Regards,
Greg
On Mon, A= ug 5, 2019 at 6:03 PM Dinesh Dutt <didutt@gmail.com> wrote:


On M= on, Aug 5, 2019 at 5:56 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh,=
thank you for your expedient detailed response.
I believe th= at the ability to run BFD session up to a tenant (VTEP-VTEP-tenant or tenan= t-tenant) was never in jeopardy from this specification.
I'm = trying to provide precise specification on what can be used ad the destinat= ion MAC and IP addresses in the inner frame/packet as I believe that likely= will help to avoid interoperability issues.
I'm interested t= o learn some more about the "martian checking" function. As you k= now, martian addresses have been used as destination IP address in LSP Ping= and BFD over MPLS LSP and PW. I haven't heard that any silicon feature= caused problems for operators using these tools.
<= div>
Interesting. I didn't know this aspect of use with M= PLS ping. Did those packets ever go through a firewall though? In any case,= maybe suggest the use of those addresses with a statement that this is how= LSP does it, but that other MAC/IP pairs are possible as long as the condi= tions of the endpoint owning the MAC/IP was honored.

Dinesh

Regards,
Greg

On Mon, Aug 5, = 2019 at 3:59 PM Dinesh Dutt <didutt@gmail.com> wrote:
Hi Greg,

That we agree on the problem definition is the first step forward.= Your original document had my cases covered and so I was surprised by the = track this thread took. It doesn't matter, we're back on track.

My recommendation is to not worry about specifying th= e precise MAC/IP address used in the inner header. The addresses chosen MUS= T ensure that the packet is trapped to the control plane of the VTEP and no= t escape to the tenant if the BFD is to the VTEP. Any solution MUST also no= t preclude the use of the BFD by tenant systems for that VNI. There are man= y ways an implementer can choose to implement this. For example, the inner = MAC address is whatever the VTEP implementer would return if ARP'd for = the IP address used in the inner header in the given VNI. The implementer c= an pick a fixed MAC address, one that they own etc. Multiple BFD sessions c= an be run for testing path connectivity on more than one VNIs. Limits shoul= d be in place to avoid overwhelming the receiver with BFD messages (you had= words about this in your currently published draft).=C2=A0 If the VNI is i= rrelevant in the test i.e. only the VXLAN pipe at the VTEP is being tested.= the user can use any VNI active on the VTEP on which the VTEP owns an IP a= ddress.

I'm concerned about the use of 127/8 a= ddress only because of firewalls or implementations that drop packets with = these addresses as either the source or destination. For example, on many m= erchant silicon, I don't believe you can turn off martian checking and = drops *only* for VXLAN-encapsulated BFD packets. I don't know what the = Linux kernel does today on such packets, for example (or Hyper-V). I'd = like a solution that doesn't demand additional or new chip functionalit= y or require additional middle-box hole punch.

Why= do you feel you MUST to specify the MAC/IP address on the inner packet? Wh= at am I missing here?

Dinesh
On Mon, = Aug 5, 2019 at 3:04 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh,
what do you see as the way forward? I agree, that the pro= posed text doesn't work for multi-VNI concurrent monitoring because the= se VNIs are tenant's VNIs. And in that case, we need to specify another= mechanism to trap the BFD Control packet at VTEP. It seems that VTEP's= Ethernet address must be used as the destination MAC address in the inner = Ethernet frame. The destination IP address may be either VTEP's address= of martian (I do prefer martian). Let me give it=C2=A0 try:
NEW = TEXT:
To monitor continuity of the path = between two VTEPs, an operator MUST select a VNI number to be used as Manag= ement VNI. Management VNI number MUST NOT be one of the tenant's VNIs t= o prevent sending VXLAN packets received on Management VNI to a tenant. VNI= number 1 is RECOMMENDED as the default for Management VNI. [Ed.note: What = we set the Destination MAC to? Can it be invalid MAC that MUST be ignored o= n receipt?]
If an implement= ation supports concurrent monitoring of multiple VNIs, then the value of VN= I number MAY be one of tenant's VNIs. The destination MAC address in th= e inner Ethernet frame encapsulating BFD Control packet MUST be MAC associa= ted with the remote VTEP.=C2=A0
The destination IP address of the= inner IP packet MUST be selected from the range 127/8 for IPv4, and for IP= v6 from the range 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP = header MUST be set to 1.

Regards,Greg=C2=A0

On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt <didutt@gmail.com> wrote:
H= i Greg,

Thanks for your clarifications. I agree wi= th your sentiment on why you're running BFD over VXLAN between VTEPs. I= wasn't arguing against it at all. All I was saying was pointing to the= limitations of the use of management VNI. I spoke to some operators who= 9;re running EVPN and mentioned the discussion on this thread. They concur = that they're using specific VNIs to test connectivity over that VNI bet= ween VTEPs to ensure misconfiguration doesn't lead to blackholes. My st= atements are based in real world operator experience. And I was providing l= anguage that ensured packets didn't leak across to tenants when they we= re destined to VTEPs.

Dinesh

On Sat, Aug = 3, 2019 at 10:34 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Dinesh,
ma= ny thanks for your detailed updates on how some implementations process VXL= AN header and the inner Ethernet frame. These are very helpful in achieving= the workable solution for the problem at hand.
You've noted = that a path between VTEPs may be monitored in the underlay network by merel= y establishing a BFD session. That is true, but by using BFD with VXLAN enc= apsulation between the pair of VTEPs we are extending the OAM domain by inc= luding, to some extent, VXLAN forwarding engine. Abstract in RFC 5880 defin= es the goal and the domain in which BFD protocol can detect a fault as:
=C2=A0 =C2=A0This document describes a protocol intended to detect f= aults in the
=C2=A0 =C2=A0bidirectional path between two forwarding engi= nes, including
=C2=A0 =C2=A0interfaces, data link(s), and to the extent = possible the forwarding
=C2=A0 =C2=A0engines themselves, with potentiall= y very low latency.=C2=A0
Thus, BFD in the underlay will exer= cise a part of IP forwarding engine while BFD with VXLAN encapsulation, ran= between the same pair of VTEPs, extends the OAM domain. At the same time, = defining BFD between tenant systems in outside the goal of this specificati= on. But VXLAN BFD session between VTEPs may be useful in monitoring e2e pat= h between tenants, as described in the update to -07:
=C2=A0 =C2= =A0At the same time, a service layer BFD session may be used between the=C2=A0 =C2=A0tenants of VTEPs IP1 and IP2 to provide end-to-end fault mana= gement.
=C2=A0 =C2=A0In such case, for VTEPs BFD control packets of that= session are
=C2=A0 =C2=A0indistinguishable from data packets.=C2=A0 If = end-to-end defect detection
=C2=A0 =C2=A0is realized as the set of conca= tenated OAM domains, e.g., VM1-1 - IP1
=C2=A0 =C2=A0-- IP2 - VM2-1, then= the BFD session over VXLAN between VTEPs SHOULD
=C2=A0 =C2=A0follow the= procedures described in Section 6.8.17 [RFC5880].
I've a= ttached the current working version of the draft.

= Regards,
Greg


On Fri, Aug 2, 2019 at 5:43 PM = Dinesh Dutt <didut= t@gmail.com> wrote:
What I mean is "How do you infer that= it excludes the case I'm talking about?".

Dinesh

On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt <didutt@gmail.com> w= rote:
The abstract reads this: "
This document describes th=
e use of the Bidirectional Forwarding
   Detection (BFD) protocol in point-to-point Virtual eXtensible Local
   Area Network (VXLAN) tunnels forming up an overlay network."
How do you infer w=
hat you said?

Dinesh

On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halp= ern <jmh@joelha= lpern.com> wrote:
I am going by what the draft says its purpose is.=C2=A0 If you (= Dinesh) want
the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft.
As currently written, the behavior Greg proposed meets the needs, and
does so in a way that is consistent with VxLAN.

Yours,
Joel

On 8/2/2019 8:30 PM, Dinesh Dutt wrote:
> What is the stated purpose of this BFD session? The VTEP reachability = is
> determined by the underlay, I don't need VXLAN-encaped packet for = that.
> Do we agree?
>
> If I want to test the VXLAN encap/decap functionality alone, picking a= ny
> single VNI maybe fine. But is this all any network operator wants? Why= ?
> In what situations has this been a problem? I suspect operators also <= br> > want to verify path continuity over a specific VNI. If you say this is=
> not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs <= br> > (see section 3). More importantly, this is a real problem that operato= rs
> like to verify.
>
> Dinesh
>
> On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jm= h@joelhalpern.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0What is special about the management VNI is precise= ly that it is NOT a
>=C2=A0 =C2=A0 =C2=A0tenant VNI.=C2=A0 The VxLAN administration does kno= w how it allocates VNI to
>=C2=A0 =C2=A0 =C2=A0tenants, and which VNI it has allocated.=C2=A0 In c= ontrast, it does not know
>=C2=A0 =C2=A0 =C2=A0which IP addresses or MAC adddresses teh tenant is = using or may plan
>=C2=A0 =C2=A0 =C2=A0to use.
>
>=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0Joel
>
>=C2=A0 =C2=A0 =C2=A0On 8/2/2019 6:41 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 > The assumption of an IP address within any VN= I is suspect that way.
>=C2=A0 =C2=A0 =C2=A0 > What's special about a single VNI, the ma= nagement VNI? The VTEP IP
>=C2=A0 =C2=A0 =C2=A0 > address does not belong in reality in any VNI= .
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halper= n
>=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>= wrote:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Your response seems to mis= s two points:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0First, the problem you des= cribe is not what the document says
>=C2=A0 =C2=A0 =C2=A0it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0solving.=C2=A0 To the degr= ee it discusses it at all, the document
>=C2=A0 =C2=A0 =C2=A0says "
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 =C2=A0In
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0most cases, a single BFD s= ession is sufficient for the given
>=C2=A0 =C2=A0 =C2=A0VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the reachability o= f a remote VTEP, regardless of the
>=C2=A0 =C2=A0 =C2=A0number of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNIs in common. "
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Second, you assume the exi= stence of an IP address for a VTEP
>=C2=A0 =C2=A0 =C2=A0within a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI.=C2=A0 As with the MAC= address, the VTEP does not have an IP
>=C2=A0 =C2=A0 =C2=A0address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0within the VNI.=C2=A0 Some= implementations may have created such a
>=C2=A0 =C2=A0 =C2=A0thing,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0but
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the general construct, as = defined to date, does not support such.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0In short, you are requirin= g a behavior that violates the
>=C2=A0 =C2=A0 =C2=A0architectural
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0structure of overlay / und= erlay separation, and common
>=C2=A0 =C2=A0 =C2=A0usage.=C2=A0 And you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0are doing so to support a = use case that the working group has not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0indicated in the document = as important.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0On 8/2/2019 5:01 PM, Dines= h Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > You understood corre= ctly.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > The VNIs may not sha= re fate due to misconfiguration. And I
>=C2=A0 =C2=A0 =C2=A0strongly
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > suspect someone will= want to use BFD for that because its
>=C2=A0 =C2=A0 =C2=A0about
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0checking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > path continuity as s= tated by the draft. As long as there's a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0valid IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > (because it's BF= D) owned by the VTEP in that VNI, you can
>=C2=A0 =C2=A0 =C2=A0use BFD in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > that VNI. Thats all = that you need to dictate.=C2=A0 That IP address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0has a MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > address and you can = use that on the inner frame. That is
>=C2=A0 =C2=A0 =C2=A0all normal
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > VXLAN processing. Th= e outer IP is always that of the VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 = at 11:03 AM Joel M. Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com= >
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com &= lt;mailto:jmh@joel= halpern.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>> w= rote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0I= f I am reading your various emails correctly Dinesh
>=C2=A0 =C2=A0 =C2=A0(and I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0may have
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0m= issed something) you are trying to use the MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0because you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= ant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= o be able to send these BFD packets over arbitrary VNI to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= NI.=C2=A0 That is not a requirement identified in the
>=C2=A0 =C2=A0 =C2=A0document.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0It is not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= ven a problem I understand, since all the VNI between an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0ingress and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= gress VTEP share fate.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Y= ours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0J= oel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0O= n 8/2/2019 1:44 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Thanks for verifying this. On Linux and hardware
>=C2=A0 =C2=A0 =C2=A0routers
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0that I'm
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ware
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > of (Cisco circa 2012 and Cumulus), the physical MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eused
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > across the VNIs on the VTEP. Did you check on a non-VMW
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0device?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0T= his is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > more for my own curiosity.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > To address the general case, can we not define a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0well-known (or
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eserve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > one) unicast MAC address for use with VTEP? If the MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > configurable in BFD command, this can be moot.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > <= santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0I have cross checked point raised about MAC address=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0usage. It is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0possible that tenant could be using physical MAC >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= hen a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packet comes with valid VNI with a MAC address
>=C2=A0 =C2=A0 =C2=A0that is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0being
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= sed by
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0tenant then packet will be sent to that tenant.
>=C2=A0 =C2=A0 =C2=A0This rules
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ut the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0fact that we could use physical MAC address as
>=C2=A0 =C2=A0 =C2=A0inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0MAC to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= nsure
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packets get terminated at VTEP itself.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 11:00 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0<santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks for your inputs.= I checked
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation within
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Vmware. Perhaps I should have been mo= re clear
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0about MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0space while checking internally. I wi= ll cross
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0check again for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the same and get back on this list. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 10:54 AM Joel= M.
>=C2=A0 =C2=A0 =C2=A0Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:jmh@joel= halpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>>&g= t; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sorry to ask a stupid q= uestion.=C2=A0 Whose
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The reason I ask is tha= t as far as I
>=C2=A0 =C2=A0 =C2=A0can tell,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0since the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tenant does not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have any control access= to the VTEP,
>=C2=A0 =C2=A0 =C2=A0there is no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eason for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have a MAC address in t= he tenant
>=C2=A0 =C2=A0 =C2=A0space.=C2=A0 Yes, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0d= evice has
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a physical
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address.=C2=A0 But = the tenant could well be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0using that MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address.=C2=A0 Yes,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they would be violating= the Ethernet spec.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0But the whole
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0point of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0segregation is not to c= are about such
>=C2=A0 =C2=A0 =C2=A0issues.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On the other hand, if y= ou tell me that
>=C2=A0 =C2=A0 =C2=A0the VMWare
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0implementation has an >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet address that i= s part of the tenant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0space, well,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they made up
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this particular game. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 7/31/2019 1:44 PM, S= antosh P K wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > I have checked wi= th implementation
>=C2=A0 =C2=A0 =C2=A0in data
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0path.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0W= hen we
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0receive a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > packet with valid= VNI then lookup
>=C2=A0 =C2=A0 =C2=A0for MAC will
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0h= appen and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it is VTEP own
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > MAC then it will = be trapped to control
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0plane for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0processing. I think we<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > can have followin= g options
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 1. Optional manag= ment VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 2. Mandatory inne= r MAC set to VTEP mac
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 3. Inner IP TTL s= et to 1 to avoid
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0forwarding of packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0via inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > address.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thoughts?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thansk
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > On Wed, Jul 31, 2= 019 at 9:20 AM Greg
>=C2=A0 =C2=A0 =C2=A0Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>&g= t;>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > <mailto:gregimirsky@gmail.com<= /a>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0thank you for your consideration
>=C2=A0 =C2=A0 =C2=A0of the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0p= roposal and
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0had proposed
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>=C2=A0 =C2=A0 =C2=A0Management
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Regards,
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0On Wed, Jul 31, 2019 at 12:03 PM
>=C2=A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Dutt
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>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com> <mailto:didutt@gmail.com
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Hi Greg,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
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>=C2=A0 =C2=A0 =C2=A0inner IP
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Greg Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>> <mailto:gregimirsky@gmail.c= om
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0s= uggestions on
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this issue,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most
>=C2=A0 =C2=A0 =C2=A0challenging
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for this
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0specification. In the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussions,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0we've agreed to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0abandon the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0dedicated MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0to be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC
>=C2=A0 =C2=A0 =C2=A0address in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI
>=C2=A0 =C2=A0 =C2=A00 was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0changed from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0mandatory to one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation may
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ffer to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an operator.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent
>=C2=A0 =C2=A0 =C2=A0discussion was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0whether
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEP's
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0destination MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0in the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I
>=C2=A0 =C2=A0 =C2=A0recall it, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= omments
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0from VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split
>=C2=A0 =C2=A0 =C2=A0with one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for it
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= nd one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0against. Hence
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose
>=C2=A0 =C2=A0 =C2=A0a new
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0text to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= esolve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the issue. The
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0idea is to let an
>=C2=A0 =C2=A0 =C2=A0operator select
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0M= anagement
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI and use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN
>=C2=A0 =C2=A0 =C2=A0encapsulation
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of BFD
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Control packets:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operator MUST
>=C2=A0 =C2=A0 =C2=A0select a VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0n= umber to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI. VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0packet for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI MUST NOT=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent to a tenant. VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number 1 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default for
>=C2=A0 =C2=A0 =C2=A0Management VNI.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, what
>=C2=A0 =C2=A0 =C2=A0can be the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0v= alue of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethernet? I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tend to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= elieve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that it can be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0reciever VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, if the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0destination IP address<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet
>=C2=A0 =C2=A0 =C2=A0can from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/1= 04. And
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be
>=C2=A0 =C2=A0 =C2=A0set to 1 (no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= hange here).
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your
>=C2=A0 =C2=A0 =C2=A0comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0q= uestions, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0suggestions.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >
>
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dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RcV26GKaRvcU; Thu, 15 Aug 2019 16:29:20 -0700 (PDT) Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 349311200F1; Thu, 15 Aug 2019 16:29:19 -0700 (PDT) Received: by mail-lf1-x135.google.com with SMTP id n19so2758962lfe.13; Thu, 15 Aug 2019 16:29:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=No1mZ8E7BFAa2PTrm7LD/cP8F+YvbqArNRF4Cm9KJ0M=; b=Yqmnjgtq50EMJQ9Yro+d0dUUEFUI7/efkB7hmJ66I5psMDHu8RSaTcRlUvPH6sM6Hs z/hDe5qlp79DxqIjBptE0CEf99gX6pvnIEraDDAyqzFhSytCLuAjiCkAdtn7AGPy6xYs 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APXvYqw8prTIzcNSp9F0AZdkXk2iF80lENsY6U3GmVW06Zl/pMkXQDCDTFSubTaBQfyoTXX8Q3tx8kkRcLpQPOz+Us0= X-Received: by 2002:a19:c711:: with SMTP id x17mr3578351lff.147.1565911757065; Thu, 15 Aug 2019 16:29:17 -0700 (PDT) MIME-Version: 1.0 References: <7437a61e-133c-c53e-fd1d-c3a31e4e90a9@joelhalpern.com> <7500b927-4b05-0e65-0afc-4bf57770f15c@joelhalpern.com> In-Reply-To: From: Greg Mirsky Date: Thu, 15 Aug 2019 16:29:04 -0700 Message-ID: Subject: Re: BFD over VXLAN: Trapping BFD Control packet at VTEP To: Santosh P K Cc: Dinesh Dutt , "Joel M. Halpern" , rtg-bfd WG , "T. Sridhar" , bfd-chairs@ietf.org, Martin Vigoureux , draft-ietf-bfd-vxlan@ietf.org Content-Type: multipart/alternative; boundary="00000000000007932a0590303ec9" Archived-At: X-Mailman-Approved-At: Fri, 16 Aug 2019 08:23:29 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Aug 2019 23:29:25 -0000 --00000000000007932a0590303ec9 Content-Type: text/plain; charset="UTF-8" Hi Santosh, thank you for your comments. Please find my notes in-lined and tagged GIM>>. Regards, Greg On Tue, Aug 13, 2019 at 10:24 PM Santosh P K wrote: > Greg, > Thanks for updated version of document. Here are few comments on new > draft. > > Section 4: > Destination MAC: This MUST NOT be of one of tenant's MAC > addresses. The MAC address MAY be configured, or it MAY be > learned via a control plane protocol. The details of how the > MAC address is obtained are outside the scope of this document. > > I think we may need to give background on why we are saying MAC address > MUST not be one of tenant's MAC address. Like in this thread we have > discussed one of the tenant could have borrowed the same VTEP mac address > and we if we have to use BFD then we need to avoid that conflict to ensure > BFD packets get observed in the VTEP itself. Should we add a section before > 4 to set that context so that above text makes more sense in that context? > GIM>> Certainly. Please share the text you'd like to add. > > > IP header: > Destination IP: IP address MUST NOT be of one of tenant's IP > addresses. IP address MAY be selected from the range 127/8 for > IPv4, for IPv6 - from the range 0:0:0:0:0:FFFF:7F00:0/104. > > TTL: MUST be set to 1 to ensure that the BFD packet is not > routed within the L3 underlay network. > > > I think we have added some text to address Sridhar comments on why TTL > MUST be 1 and dest IP address MUST be 127/8 range. I see that text is > missing now. > GIM>> My apologies that I've missed to include the text from another discussion thread. I believe the following would be complete: TTL or Hop Limit: MUST be set to 1 to ensure that the BFD packet is not routed within the Layer 3 underlay network. This addresses the scenario when the inner IP destination address is of VXLAN gateway and there is a router in underlay which removes the VXLAN header, then it is possible to route the packet as VXLAN gateway address is routable address. > > > Section 5.1: > For such packets, the BFD session MUST be identified > using the following three-tuples of fields of the inner header: the > source IP, the destination IP, and the source UDP port number present > in the IP header carried by the payload of the packet in VXLAN > encapsulation. If BFD packet is received with non-zero Your > Discriminator, then BFD session MUST be demultiplexed only with Your > Discriminator as the key. > > Just with 3 tuple we will not be able to demux packet. We need to consider > VNI as well if we have multiple BFD session between same pair of VTEP. > GIM>> This is one of comments from Carlos we need to address. Your comment have helped me to form the question: What is the goal running multiple BFD sessions between the pair of VTEPs? If the goal is to monitor per VNI, then the following text should describe the demultiplexing of the initial BFD Control packet: Demultiplexing of IP BFD packet has been defined in Section 3 of [RFC5881]. Since multiple BFD sessions may be running between two VTEPs, there needs to be a mechanism for demultiplexing received BFD packets to the proper session. For demultiplexing packets with Your Discriminator equal to 0, a BFD session MUST be identified using the logical link over which the BFD Control packet is received. In the case of VXLAN, the VNI number identifies that logical link. If BFD packet is received with non-zero Your Discriminator, then BFD session MUST be demultiplexed only with Your Discriminator as the key. Would there be need to run multiple BFD sessions with the same VNI number? > > Thanks > Santosh P K > > > On Fri, Aug 9, 2019 at 4:27 AM Greg Mirsky wrote: > >> Dinesh, thank you for your help, much appreciated. >> >> Hi Joel and Sridhar, >> could you please check if the updated text on the inner Ethernet frame >> addressed your concern. >> >> On Wed, Aug 7, 2019 at 2:25 PM Dinesh Dutt wrote: >> >>> Looks god to me Greg. Thank you for your hard work in this, >>> >>> Dinesh >>> >>> On Wed, Aug 7, 2019 at 9:25 AM Greg Mirsky >>> wrote: >>> >>>> Hi Dinesh, Joel, Sridhar, et al., >>>> much appreciate the help you've given me sharing your expertise. I hope >>>> that the updates you will find in the attached diff and the working copy of >>>> the draft be closer to the acceptable solution for VTEP-VTEP BFD. Please >>>> note, that I'll shortly start a new discussion thread to address one of >>>> Carlos's questions on the ambiguity of the text on multiple concurrent >>>> sessions between the same pair of VTEPs. >>>> Please review the changes to Sections 4 and 6 and share your feedback, >>>> suggestions, and questions. >>>> >>>> Regards, >>>> Greg >>>> >>>> On Mon, Aug 5, 2019 at 6:03 PM Dinesh Dutt wrote: >>>> >>>>> >>>>> >>>>> On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky >>>>> wrote: >>>>> >>>>>> Hi Dinesh, >>>>>> thank you for your expedient detailed response. >>>>>> I believe that the ability to run BFD session up to a tenant >>>>>> (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from this >>>>>> specification. >>>>>> I'm trying to provide precise specification on what can be used ad >>>>>> the destination MAC and IP addresses in the inner frame/packet as I believe >>>>>> that likely will help to avoid interoperability issues. >>>>>> I'm interested to learn some more about the "martian checking" >>>>>> function. As you know, martian addresses have been used as destination IP >>>>>> address in LSP Ping and BFD over MPLS LSP and PW. I haven't heard that any >>>>>> silicon feature caused problems for operators using these tools. >>>>>> >>>>> >>>>> Interesting. I didn't know this aspect of use with MPLS ping. Did >>>>> those packets ever go through a firewall though? In any case, maybe suggest >>>>> the use of those addresses with a statement that this is how LSP does it, >>>>> but that other MAC/IP pairs are possible as long as the conditions of the >>>>> endpoint owning the MAC/IP was honored. >>>>> >>>>> Dinesh >>>>> >>>>>> >>>>>> Regards, >>>>>> Greg >>>>>> >>>>>> On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt wrote: >>>>>> >>>>>>> Hi Greg, >>>>>>> >>>>>>> That we agree on the problem definition is the first step forward. >>>>>>> Your original document had my cases covered and so I was surprised by the >>>>>>> track this thread took. It doesn't matter, we're back on track. >>>>>>> >>>>>>> My recommendation is to not worry about specifying the precise >>>>>>> MAC/IP address used in the inner header. The addresses chosen MUST ensure >>>>>>> that the packet is trapped to the control plane of the VTEP and not escape >>>>>>> to the tenant if the BFD is to the VTEP. Any solution MUST also not >>>>>>> preclude the use of the BFD by tenant systems for that VNI. There are many >>>>>>> ways an implementer can choose to implement this. For example, the inner >>>>>>> MAC address is whatever the VTEP implementer would return if ARP'd for the >>>>>>> IP address used in the inner header in the given VNI. The implementer can >>>>>>> pick a fixed MAC address, one that they own etc. Multiple BFD sessions can >>>>>>> be run for testing path connectivity on more than one VNIs. Limits should >>>>>>> be in place to avoid overwhelming the receiver with BFD messages (you had >>>>>>> words about this in your currently published draft). If the VNI is >>>>>>> irrelevant in the test i.e. only the VXLAN pipe at the VTEP is being >>>>>>> tested. the user can use any VNI active on the VTEP on which the VTEP owns >>>>>>> an IP address. >>>>>>> >>>>>>> I'm concerned about the use of 127/8 address only because of >>>>>>> firewalls or implementations that drop packets with these addresses as >>>>>>> either the source or destination. For example, on many merchant silicon, I >>>>>>> don't believe you can turn off martian checking and drops *only* for >>>>>>> VXLAN-encapsulated BFD packets. I don't know what the Linux kernel does >>>>>>> today on such packets, for example (or Hyper-V). I'd like a solution that >>>>>>> doesn't demand additional or new chip functionality or require additional >>>>>>> middle-box hole punch. >>>>>>> >>>>>>> Why do you feel you MUST to specify the MAC/IP address on the inner >>>>>>> packet? What am I missing here? >>>>>>> >>>>>>> Dinesh >>>>>>> >>>>>>> On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky >>>>>>> wrote: >>>>>>> >>>>>>>> Hi Dinesh, >>>>>>>> what do you see as the way forward? I agree, that the proposed text >>>>>>>> doesn't work for multi-VNI concurrent monitoring because these VNIs are >>>>>>>> tenant's VNIs. And in that case, we need to specify another mechanism to >>>>>>>> trap the BFD Control packet at VTEP. It seems that VTEP's Ethernet address >>>>>>>> must be used as the destination MAC address in the inner Ethernet frame. >>>>>>>> The destination IP address may be either VTEP's address of martian (I do >>>>>>>> prefer martian). Let me give it try: >>>>>>>> NEW TEXT: >>>>>>>> >>>>>>>> To monitor continuity of the path between two VTEPs, an operator >>>>>>>> MUST select a VNI number to be used as Management VNI. Management VNI >>>>>>>> number MUST NOT be one of the tenant's VNIs to prevent sending VXLAN >>>>>>>> packets received on Management VNI to a tenant. VNI number 1 is RECOMMENDED >>>>>>>> as the default for Management VNI. [Ed.note: What we set the Destination >>>>>>>> MAC to? Can it be invalid MAC that MUST be ignored on receipt?] >>>>>>>> >>>>>>>> If an implementation supports concurrent monitoring of multiple >>>>>>>> VNIs, then the value of VNI number MAY be one of tenant's VNIs. The >>>>>>>> destination MAC address in the inner Ethernet frame encapsulating BFD >>>>>>>> Control packet MUST be MAC associated with the remote VTEP. >>>>>>>> The destination IP address of the inner IP packet MUST be selected >>>>>>>> from the range 127/8 for IPv4, and for IPv6 from the range >>>>>>>> 0:0:0:0:0:FFFF:7F00:0/104. The TTL value in the inner IP header MUST be set >>>>>>>> to 1. >>>>>>>> >>>>>>>> Regards, >>>>>>>> Greg >>>>>>>> >>>>>>>> On Sun, Aug 4, 2019 at 9:07 AM Dinesh Dutt >>>>>>>> wrote: >>>>>>>> >>>>>>>>> Hi Greg, >>>>>>>>> >>>>>>>>> Thanks for your clarifications. I agree with your sentiment on why >>>>>>>>> you're running BFD over VXLAN between VTEPs. I wasn't arguing against it at >>>>>>>>> all. All I was saying was pointing to the limitations of the use of >>>>>>>>> management VNI. I spoke to some operators who're running EVPN and mentioned >>>>>>>>> the discussion on this thread. They concur that they're using specific VNIs >>>>>>>>> to test connectivity over that VNI between VTEPs to ensure misconfiguration >>>>>>>>> doesn't lead to blackholes. My statements are based in real world operator >>>>>>>>> experience. And I was providing language that ensured packets didn't leak >>>>>>>>> across to tenants when they were destined to VTEPs. >>>>>>>>> >>>>>>>>> Dinesh >>>>>>>>> >>>>>>>>> On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> Hi Dinesh, >>>>>>>>>> many thanks for your detailed updates on how some implementations >>>>>>>>>> process VXLAN header and the inner Ethernet frame. These are very helpful >>>>>>>>>> in achieving the workable solution for the problem at hand. >>>>>>>>>> You've noted that a path between VTEPs may be monitored in the >>>>>>>>>> underlay network by merely establishing a BFD session. That is true, but by >>>>>>>>>> using BFD with VXLAN encapsulation between the pair of VTEPs we are >>>>>>>>>> extending the OAM domain by including, to some extent, VXLAN forwarding >>>>>>>>>> engine. Abstract in RFC 5880 defines the goal and the domain in which BFD >>>>>>>>>> protocol can detect a fault as: >>>>>>>>>> This document describes a protocol intended to detect faults >>>>>>>>>> in the >>>>>>>>>> bidirectional path between two forwarding engines, including >>>>>>>>>> interfaces, data link(s), and to the extent possible the >>>>>>>>>> forwarding >>>>>>>>>> engines themselves, with potentially very low latency. >>>>>>>>>> Thus, BFD in the underlay will exercise a part of IP forwarding >>>>>>>>>> engine while BFD with VXLAN encapsulation, ran between the same pair of >>>>>>>>>> VTEPs, extends the OAM domain. At the same time, defining BFD between >>>>>>>>>> tenant systems in outside the goal of this specification. But VXLAN BFD >>>>>>>>>> session between VTEPs may be useful in monitoring e2e path between tenants, >>>>>>>>>> as described in the update to -07: >>>>>>>>>> At the same time, a service layer BFD session may be used >>>>>>>>>> between the >>>>>>>>>> tenants of VTEPs IP1 and IP2 to provide end-to-end fault >>>>>>>>>> management. >>>>>>>>>> In such case, for VTEPs BFD control packets of that session are >>>>>>>>>> indistinguishable from data packets. If end-to-end defect >>>>>>>>>> detection >>>>>>>>>> is realized as the set of concatenated OAM domains, e.g., >>>>>>>>>> VM1-1 - IP1 >>>>>>>>>> -- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs >>>>>>>>>> SHOULD >>>>>>>>>> follow the procedures described in Section 6.8.17 [RFC5880]. >>>>>>>>>> I've attached the current working version of the draft. >>>>>>>>>> >>>>>>>>>> Regards, >>>>>>>>>> Greg >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt >>>>>>>>>> wrote: >>>>>>>>>> >>>>>>>>>>> What I mean is "How do you infer that it excludes the case I'm >>>>>>>>>>> talking about?". >>>>>>>>>>> >>>>>>>>>>> Dinesh >>>>>>>>>>> >>>>>>>>>>> On Fri, Aug 2, 2019 at 5:41 PM Dinesh Dutt >>>>>>>>>>> wrote: >>>>>>>>>>> >>>>>>>>>>>> The abstract reads this: " >>>>>>>>>>>> >>>>>>>>>>>> This document describes the use of the Bidirectional Forwarding >>>>>>>>>>>> Detection (BFD) protocol in point-to-point Virtual eXtensible Local >>>>>>>>>>>> Area Network (VXLAN) tunnels forming up an overlay network." >>>>>>>>>>>> >>>>>>>>>>>> How do you infer what you said? >>>>>>>>>>>> >>>>>>>>>>>> Dinesh >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halpern < >>>>>>>>>>>> jmh@joelhalpern.com> wrote: >>>>>>>>>>>> >>>>>>>>>>>>> I am going by what the draft says its purpose is. If you >>>>>>>>>>>>> (Dinesh) want >>>>>>>>>>>>> the draft to fulfill a different purpose, then either ask the >>>>>>>>>>>>> chairs to >>>>>>>>>>>>> take this draft back to the WG, or write a separate draft. >>>>>>>>>>>>> As currently written, the behavior Greg proposed meets the >>>>>>>>>>>>> needs, and >>>>>>>>>>>>> does so in a way that is consistent with VxLAN. >>>>>>>>>>>>> >>>>>>>>>>>>> Yours, >>>>>>>>>>>>> Joel >>>>>>>>>>>>> >>>>>>>>>>>>> On 8/2/2019 8:30 PM, Dinesh Dutt wrote: >>>>>>>>>>>>> > What is the stated purpose of this BFD session? The VTEP >>>>>>>>>>>>> reachability is >>>>>>>>>>>>> > determined by the underlay, I don't need VXLAN-encaped >>>>>>>>>>>>> packet for that. >>>>>>>>>>>>> > Do we agree? >>>>>>>>>>>>> > >>>>>>>>>>>>> > If I want to test the VXLAN encap/decap functionality alone, >>>>>>>>>>>>> picking any >>>>>>>>>>>>> > single VNI maybe fine. But is this all any network operator >>>>>>>>>>>>> wants? Why? >>>>>>>>>>>>> > In what situations has this been a problem? I suspect >>>>>>>>>>>>> operators also >>>>>>>>>>>>> > want to verify path continuity over a specific VNI. If you >>>>>>>>>>>>> say this is >>>>>>>>>>>>> > not defined by the document, I disagree because the current >>>>>>>>>>>>> version >>>>>>>>>>>>> > talks about controlling the number of BFD sessions between >>>>>>>>>>>>> the VTEPs >>>>>>>>>>>>> > (see section 3). More importantly, this is a real problem >>>>>>>>>>>>> that operators >>>>>>>>>>>>> > like to verify. >>>>>>>>>>>>> > >>>>>>>>>>>>> > Dinesh >>>>>>>>>>>>> > >>>>>>>>>>>>> > On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern < >>>>>>>>>>>>> jmh@joelhalpern.com >>>>>>>>>>>>> > > wrote: >>>>>>>>>>>>> > >>>>>>>>>>>>> > What is special about the management VNI is precisely >>>>>>>>>>>>> that it is NOT a >>>>>>>>>>>>> > tenant VNI. The VxLAN administration does know how it >>>>>>>>>>>>> allocates VNI to >>>>>>>>>>>>> > tenants, and which VNI it has allocated. In contrast, >>>>>>>>>>>>> it does not know >>>>>>>>>>>>> > which IP addresses or MAC adddresses teh tenant is using >>>>>>>>>>>>> or may plan >>>>>>>>>>>>> > to use. >>>>>>>>>>>>> > >>>>>>>>>>>>> > Yours, >>>>>>>>>>>>> > Joel >>>>>>>>>>>>> > >>>>>>>>>>>>> > On 8/2/2019 6:41 PM, Dinesh Dutt wrote: >>>>>>>>>>>>> > > The assumption of an IP address within any VNI is >>>>>>>>>>>>> suspect that way. >>>>>>>>>>>>> > > What's special about a single VNI, the management >>>>>>>>>>>>> VNI? The VTEP IP >>>>>>>>>>>>> > > address does not belong in reality in any VNI. >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > Dinesh >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halpern >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> jmh@joelhalpern.com>>> wrote: >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > Your response seems to miss two points: >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > First, the problem you describe is not what the >>>>>>>>>>>>> document says >>>>>>>>>>>>> > it is >>>>>>>>>>>>> > > solving. To the degree it discusses it at all, >>>>>>>>>>>>> the document >>>>>>>>>>>>> > says " >>>>>>>>>>>>> > > In >>>>>>>>>>>>> > > most cases, a single BFD session is sufficient >>>>>>>>>>>>> for the given >>>>>>>>>>>>> > VTEP to >>>>>>>>>>>>> > > monitor the reachability of a remote VTEP, >>>>>>>>>>>>> regardless of the >>>>>>>>>>>>> > number of >>>>>>>>>>>>> > > VNIs in common. " >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > Second, you assume the existence of an IP address >>>>>>>>>>>>> for a VTEP >>>>>>>>>>>>> > within a >>>>>>>>>>>>> > > VNI. As with the MAC address, the VTEP does not >>>>>>>>>>>>> have an IP >>>>>>>>>>>>> > address >>>>>>>>>>>>> > > within the VNI. Some implementations may have >>>>>>>>>>>>> created such a >>>>>>>>>>>>> > thing, >>>>>>>>>>>>> > > but >>>>>>>>>>>>> > > the general construct, as defined to date, does >>>>>>>>>>>>> not support such. >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > In short, you are requiring a behavior that >>>>>>>>>>>>> violates the >>>>>>>>>>>>> > architectural >>>>>>>>>>>>> > > structure of overlay / underlay separation, and >>>>>>>>>>>>> common >>>>>>>>>>>>> > usage. And you >>>>>>>>>>>>> > > are doing so to support a use case that the >>>>>>>>>>>>> working group has not >>>>>>>>>>>>> > > indicated in the document as important. >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > Yours, >>>>>>>>>>>>> > > Joel >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > On 8/2/2019 5:01 PM, Dinesh Dutt wrote: >>>>>>>>>>>>> > > > Joel, >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > > You understood correctly. >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > > The VNIs may not share fate due to >>>>>>>>>>>>> misconfiguration. And I >>>>>>>>>>>>> > strongly >>>>>>>>>>>>> > > > suspect someone will want to use BFD for that >>>>>>>>>>>>> because its >>>>>>>>>>>>> > about >>>>>>>>>>>>> > > checking >>>>>>>>>>>>> > > > path continuity as stated by the draft. As >>>>>>>>>>>>> long as there's a >>>>>>>>>>>>> > > valid IP >>>>>>>>>>>>> > > > (because it's BFD) owned by the VTEP in that >>>>>>>>>>>>> VNI, you can >>>>>>>>>>>>> > use BFD in >>>>>>>>>>>>> > > > that VNI. Thats all that you need to dictate. >>>>>>>>>>>>> That IP address >>>>>>>>>>>>> > > has a MAC >>>>>>>>>>>>> > > > address and you can use that on the inner >>>>>>>>>>>>> frame. That is >>>>>>>>>>>>> > all normal >>>>>>>>>>>>> > > > VXLAN processing. The outer IP is always that >>>>>>>>>>>>> of the VTEP. >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > > Dinesh >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > > On Fri, Aug 2, 2019 at 11:03 AM Joel M. Halpern >>>>>>>>>>>>> > > >>>>>>>>>>>>> > >>>>>>>>>>>> >> >>>>>>>>>>>>> > > > >>>>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>>>> > >>> >>>>>>>>>>>>> wrote: >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > > If I am reading your various emails >>>>>>>>>>>>> correctly Dinesh >>>>>>>>>>>>> > (and I >>>>>>>>>>>>> > > may have >>>>>>>>>>>>> > > > missed something) you are trying to use >>>>>>>>>>>>> the MAC address >>>>>>>>>>>>> > > because you >>>>>>>>>>>>> > > > want >>>>>>>>>>>>> > > > to be able to send these BFD packets over >>>>>>>>>>>>> arbitrary VNI to >>>>>>>>>>>>> > > monitor the >>>>>>>>>>>>> > > > VNI. That is not a requirement identified >>>>>>>>>>>>> in the >>>>>>>>>>>>> > document. >>>>>>>>>>>>> > > It is not >>>>>>>>>>>>> > > > even a problem I understand, since all the >>>>>>>>>>>>> VNI between an >>>>>>>>>>>>> > > ingress and >>>>>>>>>>>>> > > > egress VTEP share fate. >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > > Yours, >>>>>>>>>>>>> > > > Joel >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > > On 8/2/2019 1:44 PM, Dinesh Dutt wrote: >>>>>>>>>>>>> > > > > Thanks for verifying this. On Linux and >>>>>>>>>>>>> hardware >>>>>>>>>>>>> > routers >>>>>>>>>>>>> > > that I'm >>>>>>>>>>>>> > > > aware >>>>>>>>>>>>> > > > > of (Cisco circa 2012 and Cumulus), the >>>>>>>>>>>>> physical MAC >>>>>>>>>>>>> > address is >>>>>>>>>>>>> > > > reused >>>>>>>>>>>>> > > > > across the VNIs on the VTEP. Did you >>>>>>>>>>>>> check on a non-VMW >>>>>>>>>>>>> > > device? >>>>>>>>>>>>> > > > This is >>>>>>>>>>>>> > > > > more for my own curiosity. >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > To address the general case, can we not >>>>>>>>>>>>> define a >>>>>>>>>>>>> > > well-known (or >>>>>>>>>>>>> > > > reserve >>>>>>>>>>>>> > > > > one) unicast MAC address for use with >>>>>>>>>>>>> VTEP? If the MAC >>>>>>>>>>>>> > > address is >>>>>>>>>>>>> > > > > configurable in BFD command, this can >>>>>>>>>>>>> be moot. >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > Dinesh >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > On Fri, Aug 2, 2019 at 10:27 AM Santosh >>>>>>>>>>>>> P K >>>>>>>>>>>>> > > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>>> wrote: >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > I have cross checked point raised >>>>>>>>>>>>> about MAC address >>>>>>>>>>>>> > > usage. It is >>>>>>>>>>>>> > > > > possible that tenant could be using >>>>>>>>>>>>> physical MAC >>>>>>>>>>>>> > > address and >>>>>>>>>>>>> > > > when a >>>>>>>>>>>>> > > > > packet comes with valid VNI with a >>>>>>>>>>>>> MAC address >>>>>>>>>>>>> > that is >>>>>>>>>>>>> > > being >>>>>>>>>>>>> > > > used by >>>>>>>>>>>>> > > > > tenant then packet will be sent to >>>>>>>>>>>>> that tenant. >>>>>>>>>>>>> > This rules >>>>>>>>>>>>> > > > out the >>>>>>>>>>>>> > > > > fact that we could use physical MAC >>>>>>>>>>>>> address as >>>>>>>>>>>>> > inner >>>>>>>>>>>>> > > MAC to >>>>>>>>>>>>> > > > ensure >>>>>>>>>>>>> > > > > packets get terminated at VTEP >>>>>>>>>>>>> itself. >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > Thanks >>>>>>>>>>>>> > > > > Santosh P K >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 11:00 AM >>>>>>>>>>>>> Santosh P K >>>>>>>>>>>>> > > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > > >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>>> >>>>>>>>>>>>> > > > > wrote: >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > Joel, >>>>>>>>>>>>> > > > > Thanks for your inputs. I >>>>>>>>>>>>> checked >>>>>>>>>>>>> > > implementation within >>>>>>>>>>>>> > > > > Vmware. Perhaps I should have >>>>>>>>>>>>> been more clear >>>>>>>>>>>>> > > about MAC >>>>>>>>>>>>> > > > address >>>>>>>>>>>>> > > > > space while checking >>>>>>>>>>>>> internally. I will cross >>>>>>>>>>>>> > > check again for >>>>>>>>>>>>> > > > > the same and get back on this >>>>>>>>>>>>> list. >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > Thanks >>>>>>>>>>>>> > > > > Santosh P K >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > On Wed, Jul 31, 2019 at 10:54 >>>>>>>>>>>>> AM Joel M. >>>>>>>>>>>>> > Halpern >>>>>>>>>>>>> > > > > >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>>>> > > >>>>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>>>> > >>>>>>>>>>>> >>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>>>> > > >>>>>>>>>>>> jmh@joelhalpern.com> >>>>>>>>>>>>> > >>>> >>>>>>>>>>>>> wrote: >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > Sorry to ask a stupid >>>>>>>>>>>>> question. Whose >>>>>>>>>>>>> > > implementation? >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > The reason I ask is that as >>>>>>>>>>>>> far as I >>>>>>>>>>>>> > can tell, >>>>>>>>>>>>> > > since the >>>>>>>>>>>>> > > > > tenant does not >>>>>>>>>>>>> > > > > have any control access to >>>>>>>>>>>>> the VTEP, >>>>>>>>>>>>> > there is no >>>>>>>>>>>>> > > > reason for >>>>>>>>>>>>> > > > > the VTEP to >>>>>>>>>>>>> > > > > have a MAC address in the >>>>>>>>>>>>> tenant >>>>>>>>>>>>> > space. Yes, the >>>>>>>>>>>>> > > > device has >>>>>>>>>>>>> > > > > a physical >>>>>>>>>>>>> > > > > MAC address. But the >>>>>>>>>>>>> tenant could well be >>>>>>>>>>>>> > > using that MAC >>>>>>>>>>>>> > > > > address. Yes, >>>>>>>>>>>>> > > > > they would be violating the >>>>>>>>>>>>> Ethernet spec. >>>>>>>>>>>>> > > But the whole >>>>>>>>>>>>> > > > > point of >>>>>>>>>>>>> > > > > segregation is not to care >>>>>>>>>>>>> about such >>>>>>>>>>>>> > issues. >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > On the other hand, if you >>>>>>>>>>>>> tell me that >>>>>>>>>>>>> > the VMWare >>>>>>>>>>>>> > > > > implementation has an >>>>>>>>>>>>> > > > > Ethernet address that is >>>>>>>>>>>>> part of the tenant >>>>>>>>>>>>> > > space, well, >>>>>>>>>>>>> > > > > they made up >>>>>>>>>>>>> > > > > this particular game. >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > Yours, >>>>>>>>>>>>> > > > > Joel >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > > On 7/31/2019 1:44 PM, >>>>>>>>>>>>> Santosh P K wrote: >>>>>>>>>>>>> > > > > > I have checked with >>>>>>>>>>>>> implementation >>>>>>>>>>>>> > in data >>>>>>>>>>>>> > > path. >>>>>>>>>>>>> > > > When we >>>>>>>>>>>>> > > > > receive a >>>>>>>>>>>>> > > > > > packet with valid VNI >>>>>>>>>>>>> then lookup >>>>>>>>>>>>> > for MAC will >>>>>>>>>>>>> > > > happen and >>>>>>>>>>>>> > > > > it is VTEP own >>>>>>>>>>>>> > > > > > MAC then it will be >>>>>>>>>>>>> trapped to control >>>>>>>>>>>>> > > plane for >>>>>>>>>>>>> > > > > processing. I think we >>>>>>>>>>>>> > > > > > can have following >>>>>>>>>>>>> options >>>>>>>>>>>>> > > > > > 1. Optional managment VNI >>>>>>>>>>>>> > > > > > 2. Mandatory inner MAC >>>>>>>>>>>>> set to VTEP mac >>>>>>>>>>>>> > > > > > 3. Inner IP TTL set to 1 >>>>>>>>>>>>> to avoid >>>>>>>>>>>>> > > forwarding of packet >>>>>>>>>>>>> > > > > via inner IP >>>>>>>>>>>>> > > > > > address. >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Thoughts? >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Thansk >>>>>>>>>>>>> > > > > > Santosh P K >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > On Wed, Jul 31, 2019 at >>>>>>>>>>>>> 9:20 AM Greg >>>>>>>>>>>>> > Mirsky >>>>>>>>>>>>> > > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>>> > >>>>>>>>>>>> gregimirsky@gmail.com> >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com> >>>>>>>>>>>>> > >>>>>>>>>>>> gregimirsky@gmail.com>>>> >>>>>>>>>>>>> > > > > > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >> >>>>>>>>>>>>> > > > > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>>>> wrote: >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Hi Dinesh, >>>>>>>>>>>>> > > > > > thank you for your >>>>>>>>>>>>> consideration >>>>>>>>>>>>> > of the >>>>>>>>>>>>> > > > proposal and >>>>>>>>>>>>> > > > > questions. What >>>>>>>>>>>>> > > > > > would you see as the >>>>>>>>>>>>> scope of >>>>>>>>>>>>> > testing the >>>>>>>>>>>>> > > > > connectivity for the >>>>>>>>>>>>> > > > > > specific VNI? If it >>>>>>>>>>>>> is >>>>>>>>>>>>> > > tenant-to-tenant, then >>>>>>>>>>>>> > > > VTEPs >>>>>>>>>>>>> > > > > will treat these >>>>>>>>>>>>> > > > > > packets as regular >>>>>>>>>>>>> user frames. More >>>>>>>>>>>>> > > likely, these >>>>>>>>>>>>> > > > > could be Layer 2 >>>>>>>>>>>>> > > > > > OAM, e.g. CCM >>>>>>>>>>>>> frames. The reason >>>>>>>>>>>>> > to use >>>>>>>>>>>>> > > 127/8 for >>>>>>>>>>>>> > > > > IPv4, and >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> 0:0:0:0:0:FFFF:7F00:0/104 for >>>>>>>>>>>>> > IPv6 is >>>>>>>>>>>>> > > to safeguard >>>>>>>>>>>>> > > > > from leaking >>>>>>>>>>>>> > > > > > Ethernet frames with >>>>>>>>>>>>> BFD Control >>>>>>>>>>>>> > packet >>>>>>>>>>>>> > > to a >>>>>>>>>>>>> > > > tenant. >>>>>>>>>>>>> > > > > > You've suggested >>>>>>>>>>>>> using a MAC >>>>>>>>>>>>> > address to >>>>>>>>>>>>> > > trap the >>>>>>>>>>>>> > > > > control packet at >>>>>>>>>>>>> > > > > > VTEP. What that >>>>>>>>>>>>> address could be? We >>>>>>>>>>>>> > > had proposed >>>>>>>>>>>>> > > > > using the >>>>>>>>>>>>> > > > > > dedicated MAC and >>>>>>>>>>>>> VTEP's MAC and >>>>>>>>>>>>> > both >>>>>>>>>>>>> > > raised >>>>>>>>>>>>> > > > concerns >>>>>>>>>>>>> > > > > among VXLAN >>>>>>>>>>>>> > > > > > experts. The idea of >>>>>>>>>>>>> using >>>>>>>>>>>>> > Management >>>>>>>>>>>>> > > VNI may >>>>>>>>>>>>> > > > be more >>>>>>>>>>>>> > > > > acceptable >>>>>>>>>>>>> > > > > > based on its >>>>>>>>>>>>> similarity to the >>>>>>>>>>>>> > practice >>>>>>>>>>>>> > > of using >>>>>>>>>>>>> > > > > Management VLAN. >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Regards, >>>>>>>>>>>>> > > > > > Greg >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > On Wed, Jul 31, 2019 >>>>>>>>>>>>> at 12:03 PM >>>>>>>>>>>>> > Dinesh >>>>>>>>>>>>> > > Dutt >>>>>>>>>>>>> > > > > >>>>>>>>>>>> > >>>>>>>>>>>> > > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>>>>>>>>>>>> > >> >>>>>>>>>>>>> > > > >>>>>>>>>>>> didutt@gmail.com> >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>>>>>>>>>>>> > >>> >>>>>>>>>>>>> > > > > > >>>>>>>>>>>> didutt@gmail.com >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> >> >>>>>>>>>>>>> > > > >>>>>>>>>>>> didutt@gmail.com> >>>>>>>>>>>>> > >> >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>>> > > > >>>>>>>>>>>> didutt@gmail.com> >>>>>>>>>>>>> > >>>>> >>>>>>>>>>>>> > > > > wrote: >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Hi Greg, >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > As long as the >>>>>>>>>>>>> inner MAC >>>>>>>>>>>>> > address is >>>>>>>>>>>>> > > such >>>>>>>>>>>>> > > > that the >>>>>>>>>>>>> > > > > packet is >>>>>>>>>>>>> > > > > > trapped to the >>>>>>>>>>>>> CPU, it should be >>>>>>>>>>>>> > > fine for >>>>>>>>>>>>> > > > use as >>>>>>>>>>>>> > > > > an inner MAC is >>>>>>>>>>>>> > > > > > it not? Stating >>>>>>>>>>>>> that is >>>>>>>>>>>>> > better than >>>>>>>>>>>>> > > trying to >>>>>>>>>>>>> > > > > force a management >>>>>>>>>>>>> > > > > > VNI. What if >>>>>>>>>>>>> someone wants >>>>>>>>>>>>> > to test >>>>>>>>>>>>> > > > connectivity >>>>>>>>>>>>> > > > > on a specific >>>>>>>>>>>>> > > > > > VNI? I would not >>>>>>>>>>>>> pick a >>>>>>>>>>>>> > loopback IP >>>>>>>>>>>>> > > > address for >>>>>>>>>>>>> > > > > this since that >>>>>>>>>>>>> > > > > > address range is >>>>>>>>>>>>> host/node local >>>>>>>>>>>>> > > only. Is >>>>>>>>>>>>> > > > there a >>>>>>>>>>>>> > > > > reason you're >>>>>>>>>>>>> > > > > > not using the >>>>>>>>>>>>> VTEP IP as the >>>>>>>>>>>>> > inner IP >>>>>>>>>>>>> > > > address ? >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Dinesh >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > On Wed, Jul 31, >>>>>>>>>>>>> 2019 at 5:48 AM >>>>>>>>>>>>> > > Greg Mirsky >>>>>>>>>>>>> > > > > > < >>>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >> >>>>>>>>>>>>> > > > > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>> >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >> >>>>>>>>>>>>> > > > > >>>>>>>>>>>> gregimirsky@gmail.com >>>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> gregimirsky@gmail.com>> >>>>>>>>>>>>> > > > >>>>>>>>>>>> > >>>>>>>>>>>>> > > >>>>>>>>>>>> > >>>>> wrote: >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Dear All, >>>>>>>>>>>>> > > > > > thank you >>>>>>>>>>>>> for your comments, >>>>>>>>>>>>> > > > suggestions on >>>>>>>>>>>>> > > > > this issue, >>>>>>>>>>>>> > > > > > probably the >>>>>>>>>>>>> most >>>>>>>>>>>>> > challenging >>>>>>>>>>>>> > > for this >>>>>>>>>>>>> > > > > specification. In the >>>>>>>>>>>>> > > > > > course of >>>>>>>>>>>>> our discussions, >>>>>>>>>>>>> > > we've agreed to >>>>>>>>>>>>> > > > > abandon the >>>>>>>>>>>>> > > > > > request to >>>>>>>>>>>>> allocate the >>>>>>>>>>>>> > > dedicated MAC >>>>>>>>>>>>> > > > address >>>>>>>>>>>>> > > > > to be used as >>>>>>>>>>>>> > > > > > the >>>>>>>>>>>>> destination MAC >>>>>>>>>>>>> > address in >>>>>>>>>>>>> > > the inner >>>>>>>>>>>>> > > > > Ethernet frame. >>>>>>>>>>>>> > > > > > Also, >>>>>>>>>>>>> earlier using VNI >>>>>>>>>>>>> > 0 was >>>>>>>>>>>>> > > changed from >>>>>>>>>>>>> > > > > mandatory to one >>>>>>>>>>>>> > > > > > of the >>>>>>>>>>>>> options an >>>>>>>>>>>>> > > implementation may >>>>>>>>>>>>> > > > offer to >>>>>>>>>>>>> > > > > an operator. >>>>>>>>>>>>> > > > > > The most >>>>>>>>>>>>> recent >>>>>>>>>>>>> > discussion was >>>>>>>>>>>>> > > whether >>>>>>>>>>>>> > > > VTEP's >>>>>>>>>>>>> > > > > MAC address >>>>>>>>>>>>> > > > > > might be >>>>>>>>>>>>> used as the >>>>>>>>>>>>> > > destination MAC >>>>>>>>>>>>> > > > address >>>>>>>>>>>>> > > > > in the inner >>>>>>>>>>>>> > > > > > Ethernet >>>>>>>>>>>>> frame. As I >>>>>>>>>>>>> > recall it, the >>>>>>>>>>>>> > > > comments >>>>>>>>>>>>> > > > > from VXLAN >>>>>>>>>>>>> > > > > > experts >>>>>>>>>>>>> equally split >>>>>>>>>>>>> > with one >>>>>>>>>>>>> > > for it >>>>>>>>>>>>> > > > and one >>>>>>>>>>>>> > > > > against. Hence >>>>>>>>>>>>> > > > > > I would like >>>>>>>>>>>>> to propose >>>>>>>>>>>>> > a new >>>>>>>>>>>>> > > text to >>>>>>>>>>>>> > > > resolve >>>>>>>>>>>>> > > > > the issue. The >>>>>>>>>>>>> > > > > > idea is to >>>>>>>>>>>>> let an >>>>>>>>>>>>> > operator select >>>>>>>>>>>>> > > > Management >>>>>>>>>>>>> > > > > VNI and use >>>>>>>>>>>>> > > > > > that VNI in >>>>>>>>>>>>> VXLAN >>>>>>>>>>>>> > encapsulation >>>>>>>>>>>>> > > of BFD >>>>>>>>>>>>> > > > > Control packets: >>>>>>>>>>>>> > > > > > NEW TEXT: >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > An >>>>>>>>>>>>> operator MUST >>>>>>>>>>>>> > select a VNI >>>>>>>>>>>>> > > > number to >>>>>>>>>>>>> > > > > be used as >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> Management VNI. VXLAN >>>>>>>>>>>>> > > packet for >>>>>>>>>>>>> > > > > Management VNI MUST NOT >>>>>>>>>>>>> > > > > > be sent >>>>>>>>>>>>> to a tenant. VNI >>>>>>>>>>>>> > > number 1 is >>>>>>>>>>>>> > > > > RECOMMENDED as the >>>>>>>>>>>>> > > > > > default >>>>>>>>>>>>> for >>>>>>>>>>>>> > Management VNI. >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > With that >>>>>>>>>>>>> new text, what >>>>>>>>>>>>> > can be the >>>>>>>>>>>>> > > > value of >>>>>>>>>>>>> > > > > the destination >>>>>>>>>>>>> > > > > > MAC in the >>>>>>>>>>>>> inner Ethernet? I >>>>>>>>>>>>> > > tend to >>>>>>>>>>>>> > > > believe >>>>>>>>>>>>> > > > > that it can be >>>>>>>>>>>>> > > > > > anything and >>>>>>>>>>>>> ignored by the >>>>>>>>>>>>> > > reciever VTEP. >>>>>>>>>>>>> > > > > Also, if the >>>>>>>>>>>>> > > > > > trapping is >>>>>>>>>>>>> based on VNI >>>>>>>>>>>>> > > number, the >>>>>>>>>>>>> > > > > destination IP address >>>>>>>>>>>>> > > > > > of the inner >>>>>>>>>>>>> IP packet >>>>>>>>>>>>> > can from >>>>>>>>>>>>> > > the range >>>>>>>>>>>>> > > > > 127/8 for IPv4, >>>>>>>>>>>>> > > > > > and for IPv6 >>>>>>>>>>>>> from the range >>>>>>>>>>>>> > > > > 0:0:0:0:0:FFFF:7F00:0/104. >>>>>>>>>>>>> And >>>>>>>>>>>>> > > > > > lastly, the >>>>>>>>>>>>> TTL to be >>>>>>>>>>>>> > set to 1 (no >>>>>>>>>>>>> > > > change here). >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Much >>>>>>>>>>>>> appreciate your >>>>>>>>>>>>> > comments, >>>>>>>>>>>>> > > > questions, and >>>>>>>>>>>>> > > > > suggestions. >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > > Best regards, >>>>>>>>>>>>> > > > > > Greg >>>>>>>>>>>>> > > > > > >>>>>>>>>>>>> > > > > >>>>>>>>>>>>> > > > >>>>>>>>>>>>> > > >>>>>>>>>>>>> > >>>>>>>>>>>>> >>>>>>>>>>>> --00000000000007932a0590303ec9 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Santosh,
thank you for your commen= ts. Please find my notes in-lined and tagged GIM>>.

Regards,
Greg

<= div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 13, 2019 at 10:24 PM Santo= sh P K <santosh.pallagat= ti@gmail.com> wrote:
Greg,
=C2=A0 =C2=A0Thanks for updated vers= ion of document. Here are few comments on new draft.

Section 4:
Destination MAC: This MUST NOT be of one of tenant= 9;s MAC
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 addresses.=C2=A0 The MAC addr= ess MAY be configured, or it MAY be
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 learned via a control plane p= rotocol.=C2=A0 The details of how the
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 MAC address is obtained are o= utside the scope of this document.

= I think we may need to give background on why we are saying MAC address MUS= T not be one of tenant's MAC address. Like in this thread we have discu= ssed one of the tenant could have borrowed the same VTEP mac address and we= if we have to use BFD then we need to avoid that conflict to ensure BFD pa= ckets get observed in the VTEP itself. Should we add a section before 4 to = set that context so that above text makes more sense in that context?
GIM>> Certainly. Please share the text you&#= 39;d like to add.=C2=A0


=C2=A0=C2=A0=C2=A0IP header:
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 Destination IP: IP address MUST NOT be of one of tenant's = IP
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 addresses.=C2=A0 IP address M= AY be selected from the range 127/8 for
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 IPv4, for IPv6 - from the ran= ge 0:0:0:0:0:FFFF:7F00:0/104.

<= /div>
=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 TTL: MUST be set to 1 to ensure = that the BFD packet is not
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 routed within the L3 underlay= network.


I think we have added some text to address Sridhar comments on why TT= L MUST be 1 and dest IP address MUST be 127/8 range. I see that text is mis= sing now.
GIM>> My apologies that I'= ;ve missed to include the text from another discussion thread. I believe th= e following would be complete:
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= TTL or Hop Limit: MUST be set to 1 to ensure that the BFD
=C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0packet is not routed within the Layer 3 underlay ne= twork.=C2=A0 This
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0addresses the scenar= io when the inner IP destination address is
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0of VXLAN gateway and there is a router in underlay which
=C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0removes the VXLAN header, then it is possible to= route the
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0packet as VXLAN =C2=A0gatew= ay address is routable address.

Section 5.1:
For such packets, the BFD session MUST be identified
=C2=A0=C2=A0 using the following three-tuples of fields of the i= nner header: the
=C2=A0=C2=A0 source IP, the destination IP, and the source UDP p= ort number present
=C2=A0=C2=A0 in the IP header carried by the payload of the pack= et in VXLAN
=C2=A0=C2=A0 encapsulation.=C2=A0 If BFD packet is received with= non-zero Your
Discriminator, then BFD session MUST be demultiplexed only wi= th Your
=C2=A0=C2=A0 Discriminator as the key.

= Just with 3 tuple we will not be able to demux packet. We need to consider = VNI as well if we have multiple BFD session between same pair of VTEP.
GIM>> This is one of comments from Carlos w= e need to address. Your comment have helped me to form the question:
<= /div>
What is the goal running multiple BFD sessions be= tween the pair of VTEPs?
If the goal is to monitor = per VNI, then the following text should describe the demultiplexing of the = initial BFD Control packet:
=C2=A0 =C2=A0Demultiplexing of IP BFD packe= t has been defined in Section 3 of
=C2=A0 =C2=A0[RFC5881].=C2=A0 Since m= ultiple BFD sessions may be running between two
=C2=A0 =C2=A0VTEPs, ther= e needs to be a mechanism for demultiplexing received BFD
=C2=A0 =C2=A0p= ackets to the proper session.=C2=A0 For demultiplexing packets with Your=C2=A0 =C2=A0Discriminator equal to 0, a BFD session MUST be identified us= ing the
=C2=A0 =C2=A0logical link over which the BFD Control packet is r= eceived.=C2=A0 In the
=C2=A0 =C2=A0case of VXLAN, the VNI number identif= ies that logical link.=C2=A0 If BFD
=C2=A0 =C2=A0packet is received with= non-zero Your Discriminator, then BFD session
=C2=A0 =C2=A0MUST be demu= ltiplexed only with Your Discriminator as the key.
Would there be= need to run multiple BFD sessions with the same VNI number?

=


Thanks
Santosh P K


On Fri, Aug 9, 2019 at 4:27 AM Greg Mirsky <gregimirsky@gmail.co= m> wrote:
Dinesh, thank you for your help, much appreciated.
Hi Joel and Sridhar,
could you please check if the u= pdated text on the inner Ethernet frame addressed your concern.
=
On Wed= , Aug 7, 2019 at 2:25 PM Dinesh Dutt <didutt@gmail.com> wrote:
Looks god to me G= reg. Thank you for your hard work in this,

Dinesh<= br>

On Wed, Aug 7, 2019 at 9:25 AM Greg Mirsky <gregimirsky@gmail.com> wrote= :
Hi Dinesh, Joel, Sridhar, et al.,
much appreciate the help you'v= e=C2=A0given me sharing your expertise. I hope that the updates you will fi= nd in the attached diff and the working copy of the draft be closer to the = acceptable solution for VTEP-VTEP BFD. Please note, that I'll shortly s= tart a new discussion thread to address one of Carlos's questions on th= e ambiguity of the text on multiple concurrent sessions between the same pa= ir of VTEPs.
Please review the changes to Sections 4 and 6 and sh= are your feedback, suggestions, and questions.

Reg= ards,
Greg

On Mon, Aug 5, 2019 at 6:03 PM Dinesh Dutt <didutt@gmail.com>= ; wrote:


On Mon, Aug 5, 2019 at 5:56 PM Greg Mirsky &= lt;gregimirsky@g= mail.com> wrote:
Hi Dinesh,
thank you for your expedient detail= ed response.
I believe that the ability to run BFD session up to = a tenant (VTEP-VTEP-tenant or tenant-tenant) was never in jeopardy from thi= s specification.
I'm trying to provide precise specification = on what can be used ad the destination MAC and IP addresses in the inner fr= ame/packet as I believe that likely will help to avoid interoperability iss= ues.
I'm interested to learn some more about the "martia= n checking" function. As you know, martian addresses have been used as= destination IP address in LSP Ping and BFD over MPLS LSP and PW. I haven&#= 39;t heard that any silicon feature caused problems for operators using the= se tools.

Interesting. I didn&#= 39;t know this aspect of use with MPLS ping. Did those packets ever go thro= ugh a firewall though? In any case, maybe suggest the use of those addresse= s with a statement that this is how LSP does it, but that other MAC/IP pair= s are possible as long as the conditions of the endpoint owning the MAC/IP = was honored.

Dinesh

Regards,<= /div>
Greg

On Mon, Aug 5, 2019 at 3:59 PM Dinesh Dutt <didutt@gmail.com> wro= te:
Hi Greg,

That we agree on the problem de= finition is the first step forward. Your original document had my cases cov= ered and so I was surprised by the track this thread took. It doesn't m= atter, we're back on track.

My recommendation = is to not worry about specifying the precise MAC/IP address used in the inn= er header. The addresses chosen MUST ensure that the packet is trapped to t= he control plane of the VTEP and not escape to the tenant if the BFD is to = the VTEP. Any solution MUST also not preclude the use of the BFD by tenant = systems for that VNI. There are many ways an implementer can choose to impl= ement this. For example, the inner MAC address is whatever the VTEP impleme= nter would return if ARP'd for the IP address used in the inner header = in the given VNI. The implementer can pick a fixed MAC address, one that th= ey own etc. Multiple BFD sessions can be run for testing path connectivity = on more than one VNIs. Limits should be in place to avoid overwhelming the = receiver with BFD messages (you had words about this in your currently publ= ished draft).=C2=A0 If the VNI is irrelevant in the test i.e. only the VXLA= N pipe at the VTEP is being tested. the user can use any VNI active on the = VTEP on which the VTEP owns an IP address.

I'm= concerned about the use of 127/8 address only because of firewalls or impl= ementations that drop packets with these addresses as either the source or = destination. For example, on many merchant silicon, I don't believe you= can turn off martian checking and drops *only* for VXLAN-encapsulated BFD = packets. I don't know what the Linux kernel does today on such packets,= for example (or Hyper-V). I'd like a solution that doesn't demand = additional or new chip functionality or require additional middle-box hole = punch.

Why do you feel you MUST to specify the MAC= /IP address on the inner packet? What am I missing here?

=
Dinesh

On Mon, Aug 5, 2019 at 3:04 PM Greg Mirsky <<= a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail= .com> wrote:
Hi Dinesh,
what do you see as the= way forward? I agree, that the proposed text doesn't work for multi-VN= I concurrent monitoring because these VNIs are tenant's VNIs. And in th= at case, we need to specify another mechanism to trap the BFD Control packe= t at VTEP. It seems that VTEP's Ethernet address must be used as the de= stination MAC address in the inner Ethernet frame. The destination IP addre= ss may be either VTEP's address of martian (I do prefer martian). Let m= e give it=C2=A0 try:
NEW TEXT:
To monitor continuity of the path between two VTEPs, an operator MUST sele= ct a VNI number to be used as Management VNI. Management VNI number MUST NO= T be one of the tenant's VNIs to prevent sending VXLAN packets received= on Management VNI to a tenant. VNI number 1 is RECOMMENDED as the default = for Management VNI. [Ed.note: What we set the Destination MAC to? Can it be= invalid MAC that MUST be ignored on receipt?]
If an implementation supports concurrent monitoring of = multiple VNIs, then the value of VNI number MAY be one of tenant's VNIs= . The destination MAC address in the inner Ethernet frame encapsulating BFD= Control packet MUST be MAC associated with the remote VTEP.=C2=A0
The destination IP address of the inner IP packet MUST be selected from t= he range 127/8 for IPv4, and for IPv6 from the range 0:0:0:0:0:FFFF:7F00:0/= 104. The TTL value in the inner IP header MUST be set to 1.

<= /div>
Regards,
Greg=C2=A0

On Sun, Aug 4, 2019 at 9:07 AM= Dinesh Dutt <didu= tt@gmail.com> wrote:
Hi Greg,

Thanks = for your clarifications. I agree with your sentiment on why you're runn= ing BFD over VXLAN between VTEPs. I wasn't arguing against it at all. A= ll I was saying was pointing to the limitations of the use of management VN= I. I spoke to some operators who're running EVPN and mentioned the disc= ussion on this thread. They concur that they're using specific VNIs to = test connectivity over that VNI between VTEPs to ensure misconfiguration do= esn't lead to blackholes. My statements are based in real world operato= r experience. And I was providing language that ensured packets didn't = leak across to tenants when they were destined to VTEPs.

Dinesh

On Sat, Aug 3, 2019 at 10:34 AM Greg Mirsky <gregimirsky@gmail.co= m> wrote:
Hi Dinesh,
many thanks for your detailed updates on h= ow some implementations process VXLAN header and the inner Ethernet frame. = These are very helpful in achieving the workable solution for the problem a= t hand.
You've noted that a path between VTEPs may be monitor= ed in the underlay network by merely establishing a BFD session. That is tr= ue, but by using BFD with VXLAN encapsulation between the pair of VTEPs we = are extending the OAM domain by including, to some extent, VXLAN forwarding= engine. Abstract in RFC 5880 defines the goal and the domain in which BFD = protocol can detect a fault as:
=C2=A0 =C2=A0This document descri= bes a protocol intended to detect faults in the
=C2=A0 =C2=A0bidirection= al path between two forwarding engines, including
=C2=A0 =C2=A0interface= s, data link(s), and to the extent possible the forwarding
=C2=A0 =C2=A0= engines themselves, with potentially very low latency.=C2=A0
= Thus, BFD in the underlay will exercise a part of IP forwarding engine whil= e BFD with VXLAN encapsulation, ran between the same pair of VTEPs, extends= the OAM domain. At the same time, defining BFD between tenant systems in o= utside the goal of this specification. But VXLAN BFD session between VTEPs = may be useful in monitoring e2e path between tenants, as described in the u= pdate to -07:
=C2=A0 =C2=A0At the same time, a service layer BFD = session may be used between the
=C2=A0 =C2=A0tenants of VTEPs IP1 and IP= 2 to provide end-to-end fault management.
=C2=A0 =C2=A0In such case, for= VTEPs BFD control packets of that session are
=C2=A0 =C2=A0indistinguis= hable from data packets.=C2=A0 If end-to-end defect detection
=C2=A0 =C2= =A0is realized as the set of concatenated OAM domains, e.g., VM1-1 - IP1=C2=A0 =C2=A0-- IP2 - VM2-1, then the BFD session over VXLAN between VTEPs= SHOULD
=C2=A0 =C2=A0follow the procedures described in Section 6.8.17 [= RFC5880].
I've attached the current working version of th= e draft.

Regards,
Greg


On Fri, Aug 2, 2019 at 5:43 PM Dinesh Dutt <didutt@gmail.com> wrote:
What I m= ean is "How do you infer that it excludes the case I'm talking abo= ut?".

Dinesh

On Fri, Aug 2, 201= 9 at 5:41 PM Dinesh Dutt <didutt@gmail.com> wrote:
The abstract reads this: "
This document describes the use of the Bidirectional Forwarding
   Detection (BFD) protocol in point-to-point Virtual eXtensible Local
   Area Network (VXLAN) tunnels forming up an overlay network."
How do you infer w=
hat you said?

Dinesh

On Fri, Aug 2, 2019 at 5:38 PM Joel M. Halp= ern <jmh@joelha= lpern.com> wrote:
I am going by what the draft says its purpose is.=C2=A0 If you (= Dinesh) want
the draft to fulfill a different purpose, then either ask the chairs to take this draft back to the WG, or write a separate draft.
As currently written, the behavior Greg proposed meets the needs, and
does so in a way that is consistent with VxLAN.

Yours,
Joel

On 8/2/2019 8:30 PM, Dinesh Dutt wrote:
> What is the stated purpose of this BFD session? The VTEP reachability = is
> determined by the underlay, I don't need VXLAN-encaped packet for = that.
> Do we agree?
>
> If I want to test the VXLAN encap/decap functionality alone, picking a= ny
> single VNI maybe fine. But is this all any network operator wants? Why= ?
> In what situations has this been a problem? I suspect operators also <= br> > want to verify path continuity over a specific VNI. If you say this is=
> not defined by the document, I disagree because the current version > talks about controlling the number of BFD sessions between the VTEPs <= br> > (see section 3). More importantly, this is a real problem that operato= rs
> like to verify.
>
> Dinesh
>
> On Fri, Aug 2, 2019 at 5:08 PM Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jm= h@joelhalpern.com>> wrote:
>
>=C2=A0 =C2=A0 =C2=A0What is special about the management VNI is precise= ly that it is NOT a
>=C2=A0 =C2=A0 =C2=A0tenant VNI.=C2=A0 The VxLAN administration does kno= w how it allocates VNI to
>=C2=A0 =C2=A0 =C2=A0tenants, and which VNI it has allocated.=C2=A0 In c= ontrast, it does not know
>=C2=A0 =C2=A0 =C2=A0which IP addresses or MAC adddresses teh tenant is = using or may plan
>=C2=A0 =C2=A0 =C2=A0to use.
>
>=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0Joel
>
>=C2=A0 =C2=A0 =C2=A0On 8/2/2019 6:41 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 > The assumption of an IP address within any VN= I is suspect that way.
>=C2=A0 =C2=A0 =C2=A0 > What's special about a single VNI, the ma= nagement VNI? The VTEP IP
>=C2=A0 =C2=A0 =C2=A0 > address does not belong in reality in any VNI= .
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 at 3:17 PM Joel M. Halper= n
>=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>= wrote:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Your response seems to mis= s two points:
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0First, the problem you des= cribe is not what the document says
>=C2=A0 =C2=A0 =C2=A0it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0solving.=C2=A0 To the degr= ee it discusses it at all, the document
>=C2=A0 =C2=A0 =C2=A0says "
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 =C2=A0In
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0most cases, a single BFD s= ession is sufficient for the given
>=C2=A0 =C2=A0 =C2=A0VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the reachability o= f a remote VTEP, regardless of the
>=C2=A0 =C2=A0 =C2=A0number of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNIs in common. "
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Second, you assume the exi= stence of an IP address for a VTEP
>=C2=A0 =C2=A0 =C2=A0within a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI.=C2=A0 As with the MAC= address, the VTEP does not have an IP
>=C2=A0 =C2=A0 =C2=A0address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0within the VNI.=C2=A0 Some= implementations may have created such a
>=C2=A0 =C2=A0 =C2=A0thing,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0but
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the general construct, as = defined to date, does not support such.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0In short, you are requirin= g a behavior that violates the
>=C2=A0 =C2=A0 =C2=A0architectural
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0structure of overlay / und= erlay separation, and common
>=C2=A0 =C2=A0 =C2=A0usage.=C2=A0 And you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0are doing so to support a = use case that the working group has not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0indicated in the document = as important.
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0On 8/2/2019 5:01 PM, Dines= h Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > You understood corre= ctly.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > The VNIs may not sha= re fate due to misconfiguration. And I
>=C2=A0 =C2=A0 =C2=A0strongly
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > suspect someone will= want to use BFD for that because its
>=C2=A0 =C2=A0 =C2=A0about
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0checking
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > path continuity as s= tated by the draft. As long as there's a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0valid IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > (because it's BF= D) owned by the VTEP in that VNI, you can
>=C2=A0 =C2=A0 =C2=A0use BFD in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > that VNI. Thats all = that you need to dictate.=C2=A0 That IP address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0has a MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > address and you can = use that on the inner frame. That is
>=C2=A0 =C2=A0 =C2=A0all normal
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > VXLAN processing. Th= e outer IP is always that of the VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > On Fri, Aug 2, 2019 = at 11:03 AM Joel M. Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com <mailto:jmh@joelhalpern.com= >
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 > <mailto:jmh@joelhalpern.com &= lt;mailto:jmh@joel= halpern.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>> w= rote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0I= f I am reading your various emails correctly Dinesh
>=C2=A0 =C2=A0 =C2=A0(and I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0may have
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0m= issed something) you are trying to use the MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0because you
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= ant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= o be able to send these BFD packets over arbitrary VNI to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0monitor the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= NI.=C2=A0 That is not a requirement identified in the
>=C2=A0 =C2=A0 =C2=A0document.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0It is not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= ven a problem I understand, since all the VNI between an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0ingress and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= gress VTEP share fate.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Y= ours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0J= oel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0O= n 8/2/2019 1:44 PM, Dinesh Dutt wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Thanks for verifying this. On Linux and hardware
>=C2=A0 =C2=A0 =C2=A0routers
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0that I'm
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ware
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > of (Cisco circa 2012 and Cumulus), the physical MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eused
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > across the VNIs on the VTEP. Did you check on a non-VMW
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0device?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0T= his is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > more for my own curiosity.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > To address the general case, can we not define a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0well-known (or
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eserve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > one) unicast MAC address for use with VTEP? If the MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > configurable in BFD command, this can be moot.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > On Fri, Aug 2, 2019 at 10:27 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = > <= santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0I have cross checked point raised about MAC address=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0usage. It is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0possible that tenant could be using physical MAC >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0address and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0w= hen a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packet comes with valid VNI with a MAC address
>=C2=A0 =C2=A0 =C2=A0that is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0being
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= sed by
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0tenant then packet will be sent to that tenant.
>=C2=A0 =C2=A0 =C2=A0This rules
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ut the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0fact that we could use physical MAC address as
>=C2=A0 =C2=A0 =C2=A0inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0MAC to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0e= nsure
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0packets get terminated at VTEP itself.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 11:00 AM Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0<santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:santosh.pallagatti@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail= .com
>=C2=A0 =C2=A0 =C2=A0<mailto:santosh.pallagatti@gmail.com>>>>&= gt;
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks for your inputs.= I checked
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation within
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Vmware. Perhaps I should have been mo= re clear
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0about MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0space while checking internally. I wi= ll cross
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0check again for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the same and get back on this list. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Thanks
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 10:54 AM Joel= M.
>=C2=A0 =C2=A0 =C2=A0Halpern
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:jmh@joel= halpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com> <mailto:jmh@joelhalpern.com
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailt= o:jmh@joelhalpern.= com>
>=C2=A0 =C2=A0 =C2=A0<mailto:jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>>>>&g= t; wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sorry to ask a stupid q= uestion.=C2=A0 Whose
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The reason I ask is tha= t as far as I
>=C2=A0 =C2=A0 =C2=A0can tell,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0since the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tenant does not
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have any control access= to the VTEP,
>=C2=A0 =C2=A0 =C2=A0there is no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= eason for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the VTEP to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0have a MAC address in t= he tenant
>=C2=A0 =C2=A0 =C2=A0space.=C2=A0 Yes, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0d= evice has
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0a physical
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address.=C2=A0 But = the tenant could well be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0using that MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address.=C2=A0 Yes,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they would be violating= the Ethernet spec.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0But the whole
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0point of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0segregation is not to c= are about such
>=C2=A0 =C2=A0 =C2=A0issues.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On the other hand, if y= ou tell me that
>=C2=A0 =C2=A0 =C2=A0the VMWare
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0implementation has an >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet address that i= s part of the tenant
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0space, well,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0they made up
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this particular game. >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Yours,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Joel
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0On 7/31/2019 1:44 PM, S= antosh P K wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > I have checked wi= th implementation
>=C2=A0 =C2=A0 =C2=A0in data
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0path.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0W= hen we
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0receive a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > packet with valid= VNI then lookup
>=C2=A0 =C2=A0 =C2=A0for MAC will
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0h= appen and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0it is VTEP own
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > MAC then it will = be trapped to control
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0plane for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0processing. I think we<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > can have followin= g options
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 1. Optional manag= ment VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 2. Mandatory inne= r MAC set to VTEP mac
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > 3. Inner IP TTL s= et to 1 to avoid
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0forwarding of packet
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0via inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > address.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thoughts?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Thansk
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > Santosh P K
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > On Wed, Jul 31, 2= 019 at 9:20 AM Greg
>=C2=A0 =C2=A0 =C2=A0Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>&g= t;>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > <mailto:gregimirsky@gmail.com<= /a>
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Hi Dinesh,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0thank you for your consideration
>=C2=A0 =C2=A0 =C2=A0of the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0p= roposal and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0questions. What
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0would you see as the scope of
>=C2=A0 =C2=A0 =C2=A0testing the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0connectivity for the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0specific VNI? If it is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tenant-to-tenant, then
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEPs
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0will treat these
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0packets as regular user frames. More
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0likely, these
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0OAM, e.g. CCM frames. The reason
>=C2=A0 =C2=A0 =C2=A0to use
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A00:0:0:0:0:FFFF:7F00:0/104 for
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Ethernet frames with BFD Control
>=C2=A0 =C2=A0 =C2=A0packet
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0You've suggested using a MAC
>=C2=A0 =C2=A0 =C2=A0address to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trap the
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0VTEP. What that address could be? We
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0had proposed
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0dedicated MAC and VTEP's MAC and
>=C2=A0 =C2=A0 =C2=A0both
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= oncerns
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0among VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0experts. The idea of using
>=C2=A0 =C2=A0 =C2=A0Management
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0VNI may
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0based on its similarity to the
>=C2=A0 =C2=A0 =C2=A0practice
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of using
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VLAN.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0On Wed, Jul 31, 2019 at 12:03 PM
>=C2=A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Dutt
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com> <mailto:didutt@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0<mailto:didutt@= gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:didutt@gmai= l.com <mailto:= didutt@gmail.com>
>=C2=A0 =C2=A0 =C2=A0<mailto:didutt@gmail.com <mailto:didutt@gmail.com>>>>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0wrote:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Hi Greg,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0As long as the inner MAC
>=C2=A0 =C2=A0 =C2=A0address is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0such
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= hat the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0packet is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0trapped to the CPU, it should be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0fine for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0u= se as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an inner MAC is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0it not? Stating that is
>=C2=A0 =C2=A0 =C2=A0better than
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0trying to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0force a management
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0VNI. What if someone wants
>=C2=A0 =C2=A0 =C2=A0to test
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= onnectivity
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0on a specific
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0VNI? I would not pick a
>=C2=A0 =C2=A0 =C2=A0loopback IP
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this since that
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0address range is host/node local
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0t= here a
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reason you're
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0not using the VTEP IP as the
>=C2=A0 =C2=A0 =C2=A0inner IP
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress ?
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0Dinesh
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0On Wed, Jul 31, 2019 at 5:48 AM
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0Greg Mirsky
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0<gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
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>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
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>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>> <mailto:gregimirsky@gmail.c= om
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
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>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com <m= ailto:gregimirsk= y@gmail.com>>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0&= lt;mailto:gregim= irsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com
>=C2=A0 =C2=A0 =C2=A0<mailto:gregimirsky@gmail.com>>>>>> wrote:=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Dear All,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0thank you for your comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0s= uggestions on
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0this issue,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably the most
>=C2=A0 =C2=A0 =C2=A0challenging
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for this
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0specification. In the >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0course of our discussions,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0we've agreed to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0abandon the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0request to allocate the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0dedicated MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0to be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination MAC
>=C2=A0 =C2=A0 =C2=A0address in
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the inner
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, earlier using VNI
>=C2=A0 =C2=A0 =C2=A00 was
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the options an
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0implementation may
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0o= ffer to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0an operator.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The most recent
>=C2=A0 =C2=A0 =C2=A0discussion was
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0whether
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0V= TEP's
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC address
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0might be used as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0destination MAC
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= ddress
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ethernet frame. As I
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= omments
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0from VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0experts equally split
>=C2=A0 =C2=A0 =C2=A0with one
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0for it
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0a= nd one
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>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I would like to propose
>=C2=A0 =C2=A0 =C2=A0a new
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0text to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0r= esolve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the issue. The
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>=C2=A0 =C2=A0 =C2=A0operator select
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0M= anagement
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VNI and use
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that VNI in VXLAN
>=C2=A0 =C2=A0 =C2=A0encapsulation
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0of BFD
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Control packets:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0NEW TEXT:
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0An operator MUST
>=C2=A0 =C2=A0 =C2=A0select a VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0n= umber to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be used as
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI. VXLAN
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0packet for
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Management VNI MUST NOT=
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0be sent to a tenant. VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number 1 is
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RECOMMENDED as the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0default for
>=C2=A0 =C2=A0 =C2=A0Management VNI.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0With that new text, what
>=C2=A0 =C2=A0 =C2=A0can be the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0v= alue of
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the destination
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0MAC in the inner Ethernet? I
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0tend to
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0b= elieve
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that it can be
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0anything and ignored by the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0reciever VTEP.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Also, if the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0trapping is based on VNI
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0number, the
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0destination IP address<= br> >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0of the inner IP packet
>=C2=A0 =C2=A0 =C2=A0can from
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0127/8 for IPv4,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and for IPv6 from the range
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00:0:0:0:0:FFFF:7F00:0/1= 04. And
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0lastly, the TTL to be
>=C2=A0 =C2=A0 =C2=A0set to 1 (no
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0c= hange here).
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Much appreciate your
>=C2=A0 =C2=A0 =C2=A0comments,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0q= uestions, and
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0suggestions.
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Best regards,
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Greg
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 = >
>=C2=A0 =C2=A0 =C2=A0 >=C2=A0 =C2=A0 =C2=A0 >
>=C2=A0 =C2=A0 =C2=A0 >
>
--00000000000007932a0590303ec9-- From nobody Mon Aug 19 04:29:11 2019 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 6945712011F; Mon, 19 Aug 2019 04:29:09 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit From: =?utf-8?q?Martin_Bj=C3=B6rklund_via_Datatracker?= To: Cc: rtg-bfd@ietf.org, draft-ietf-bfd-unsolicited.all@ietf.org, ietf@ietf.org Subject: Yangdoctors early review of draft-ietf-bfd-unsolicited-01 X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: =?utf-8?q?Martin_Bj=C3=B6rklund?= Message-ID: <156621414936.19813.853283734958376284@ietfa.amsl.com> Date: Mon, 19 Aug 2019 04:29:09 -0700 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Aug 2019 11:29:10 -0000 Reviewer: Martin Björklund Review result: Ready with Nits I have reviewed this document from a YANG model perspective only. My only comment is actually for a grouping defined in ietf-bfd-type, but used in this module. There is a choice "interval-config-type": +--rw unsolicited {bfd-unsol:unsolicited-params-global}? +--rw enable? boolean +--rw local-multiplier? multiplier +--rw (interval-config-type)? +--:(tx-rx-intervals) | +--rw desired-min-tx-interval? uint32 | +--rw required-min-rx-interval? uint32 +--:(single-interval) {single-minimum-interval}? +--rw min-interval? uint32 This choice is not mandatory and doesn't have a default case, so the question is what happens if no nodes from the choice has been configured? I would expect the choice to have a default case (but this then would apply to ietf-bfd-types, not this document.) From nobody Mon Aug 19 09:13:49 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0A5181200D7; Mon, 19 Aug 2019 09:13:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cbAkZciRC4Ud; Mon, 19 Aug 2019 09:13:45 -0700 (PDT) Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 724EC120096; Mon, 19 Aug 2019 09:13:45 -0700 (PDT) Received: by mail-lf1-x12f.google.com with SMTP id p197so1820660lfa.2; Mon, 19 Aug 2019 09:13:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=G+hQ4/migxJhWO3KVoUerDan72hlxQ6cWITt6wLAz7g=; b=J/5Tjdd0N3K7kwAqe+BUc5Smb2EXbYc970Gq54O83nTz+yksABosg5Y5OlgFS8rs/d 8s83CPaCchQ6d75Gu7E8GXVyIGEBgJ44PVf5MfKCScuTswfSqtB6VN1fGpBRx7coce0v xAs2k6e+qlR6DMImvaj6/2Vbt8W54O4yuIx1J4dH9kJTUFvIIou0Ch7+t9EM22SkIsEG ze5WGBXgR2koJHy73P6W1st6SAAE9zkwc+2JA/v/ZW1T5foRJCwW+4jzW60Bt5o1XpcW F04ELxg2jlss1gy9LK7KN0yEsKmsWP3uGt4blggB3yJaCTG95KIhylU+5zUa1zv/g/yU EXqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=G+hQ4/migxJhWO3KVoUerDan72hlxQ6cWITt6wLAz7g=; b=oZ48o1h/VstCZfJ8TmwLFE+iIJZFFLwNV7gbv1Y12dKLDCefKcJ9cz1CLjaBNNi0nL x8K7uTV8jVXjxq71HDwwTJLwbu1HCOEIg05jIpcfP5JQf3xzdf7aBLsHx0Qpzv8dFtG1 lWpVwokldu1EcHNSIw6njWi55UJvI33i9+Aocga4/UqUf9vK2gJC/dXKxsig2PXIwS6g NujPvOZ7Pkxaxl1zHro8seyNUv19w3bn+u3qGE54If0RB5Hmy21Pi8ci98V9svVgoTMK 4m8xg+23RnrrkMBrtEMf/e6VaVq7PTZ+KdpcThglESuqViBVli43IuvODMhSy80jFEXZ HODw== X-Gm-Message-State: APjAAAVZtQbS1+wx3HKvcNZ0uIZNh68f1AiBPgslWc1jMGxrEO9o4LSh Bi+0YjO+D3BIGSRQRUctjCbMGVLJlo0/zRKJq20k3Q== X-Google-Smtp-Source: APXvYqwoXfiK7Oy/7oxj+3clsSpWckA7wvuYuHrfUO4e8hLqYtdqHW4ChtmOmlrc+TAFRIDrBAGBBvFJvrLCpB/4euM= X-Received: by 2002:ac2:442f:: with SMTP id w15mr5004481lfl.9.1566231223200; Mon, 19 Aug 2019 09:13:43 -0700 (PDT) MIME-Version: 1.0 From: Greg Mirsky Date: Mon, 19 Aug 2019 09:13:31 -0700 Message-ID: Subject: BFD over VXLAN vs. RFC 7348 To: rtg-bfd WG , bfd-chairs@ietf.org Content-Type: multipart/alternative; boundary="000000000000b1f3d705907a9f50" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Aug 2019 16:13:47 -0000 --000000000000b1f3d705907a9f50 Content-Type: text/plain; charset="UTF-8" Dear WG Chairs, et al., much appreciate your consideration and help to resolve one of the questions raised by reviewers from several directorates: RFC 7348 is Informational, should this specification be on the Informational track as well? In the course of the discussions, I've been pointing to previous cases at IETF when a base specification, e.g., IS-IS, was introduced on the Informational track but later it was used as the Normative reference and its extensions published as Standard track documents. Also, the recent updates that seem to be acceptable to Dinesh, Joel and Sridhar introduces the notion of the special VNI, Management VNI. Would that be considered as an update of RFC 7348? Much appreciate your thoughts, comments, and questions. Regards, Greg --000000000000b1f3d705907a9f50 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear WG Chairs, et al.,
much appreciate your considera= tion and help to resolve one of the questions raised by reviewers from seve= ral directorates:
RFC 7348 is Informational, should this specification = be on the Informational track as well?
In the course of t= he discussions, I've been pointing to previous cases at IETF when a bas= e specification, e.g., IS-IS, was introduced on the Informational track but= later it was used as the Normative reference and its extensions published = as Standard track documents.
Also, the recent updates that seem t= o be acceptable to Dinesh, Joel and Sridhar introduces the notion of the sp= ecial VNI, Management VNI. Would that be considered as an update of RFC 734= 8?

Much appreciate your thoughts, comments, and qu= estions.

Regards,
Greg
--000000000000b1f3d705907a9f50-- From nobody Mon Aug 19 11:45:21 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A380F120091; Mon, 19 Aug 2019 11:45:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.999 X-Spam-Level: X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NUBXZnOo4S8H; Mon, 19 Aug 2019 11:45:12 -0700 (PDT) Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2C373120059; Mon, 19 Aug 2019 11:45:09 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id y8so1378903plr.12; Mon, 19 Aug 2019 11:45:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=AJkzZsT8qMgSY32ECD81JPe/2JRwxa63i4fzZlQ3Fkk=; b=gD9S/xV5cVbzao3kyDVK3+jTB2SjS+Zr7Sw1Uw4PgkhnOyfC6Q0C62jF2/pnK5N3ga cNDn4OCiFz9JHfOeD6OpkmjqsMIUG3A4oB5ysHsQz4VC+xrzX4pUx5TS7o9XrstpZKrL jFBxfVuX4blywe7Rz2Du7Nz97y7ti4oe68n4qxNtTZjmrsMSm1GA+yL4xg/RbB9PSwyk 4dKbpU9SRgUWwGx4KmIj2O0CxtQHT2nWnJSCtBl8wz1g7GUGCXwUNsv8GIZ91BZQpHjM O1rnw8Q1A8L4AQMBewFAQdkuS966eDRaVkB8m8clfUZ0bgiBQjkFvDcPEHZyRhBh3Rr0 hwQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=AJkzZsT8qMgSY32ECD81JPe/2JRwxa63i4fzZlQ3Fkk=; b=iSw5qY+OCNQrVGvq7gPkA4087S3+4IU912OkHAYM7OefVVDESl54xes2ocmwikQG74 G3RmHusBubkCgXun1jVpWn2JAA7RBl0yYS+5ghQ3fiG6jtXZT/m27v8g69xxVq/N6MnX uTmY+URjQuUSLNmR5WqPsYpVi7MB1HhQ5evN7Cl+DweEoCfHzHJw3D8YM64jyrRvkm0M qf5ohnon1c0x8YaYuJZYgVyzp1DXUn33mDiIr1luzgA1Jw/rEysRMjsgiBkODiamIpuH hk5Va4MHyyQPQyXnXr9IUZ6AXfsa2h3F+WLAi1IFITHyFczUSElTk4H/0v8rfAzhHoYx nn0g== X-Gm-Message-State: APjAAAU7E1Iro7hG8YwS1AKz2QHAAWQsMJNL5BDp2OzyKt8WTss6dmUk 02X/+dsGualzBIn2CCd8X/KZk5Jl5iE= X-Google-Smtp-Source: APXvYqzOfC5xfbaOEToKwJRvIWn8A2Ryj0lWAVcpBT0G1OldfRen12nfEp2kxLpjqJPA3DU1nRKgDQ== X-Received: by 2002:a17:902:988d:: with SMTP id s13mr15633237plp.139.1566240308299; Mon, 19 Aug 2019 11:45:08 -0700 (PDT) Received: from [10.33.122.240] ([66.170.99.1]) by smtp.gmail.com with ESMTPSA id 65sm24039566pff.148.2019.08.19.11.45.05 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 19 Aug 2019 11:45:06 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Subject: Re: Yangdoctors early review of draft-ietf-bfd-unsolicited-01 From: Mahesh Jethanandani In-Reply-To: <156621414936.19813.853283734958376284@ietfa.amsl.com> Date: Mon, 19 Aug 2019 11:45:05 -0700 Cc: YANG Doctors , "rtg-bfd@ietf. org" , draft-ietf-bfd-unsolicited.all@ietf.org, ietf@ietf.org, draft-ietf-bfd-yang@ietf.org Content-Transfer-Encoding: quoted-printable Message-Id: <0CD4CB48-9382-4724-A5A6-A7B0DE7D7D57@gmail.com> References: <156621414936.19813.853283734958376284@ietfa.amsl.com> To: =?utf-8?Q?Martin_Bj=C3=B6rklund?= X-Mailer: Apple Mail (2.3445.9.1) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Aug 2019 18:45:14 -0000 [Adding the authors of BFD YANG module] Martin brings up a good point. But since the document that contains = ietf-bfd-types is sitting in RFC Ed Queue, this will have to go into a = bis document. Chairs, could you create a bfd-wg in GitHub for us to track this as an = issue to be fixed as part of a bis document? > On Aug 19, 2019, at 4:29 AM, Martin Bj=C3=B6rklund via Datatracker = wrote: >=20 > Reviewer: Martin Bj=C3=B6rklund > Review result: Ready with Nits >=20 > I have reviewed this document from a YANG model perspective only. >=20 > My only comment is actually for a grouping defined in ietf-bfd-type, = but used > in this module. There is a choice "interval-config-type": >=20 > +--rw unsolicited {bfd-unsol:unsolicited-params-global}? > +--rw enable? boolean > +--rw local-multiplier? multiplier > +--rw (interval-config-type)? > +--:(tx-rx-intervals) > | +--rw desired-min-tx-interval? uint32 > | +--rw required-min-rx-interval? uint32 > +--:(single-interval) {single-minimum-interval}? > +--rw min-interval? uint32 >=20 > This choice is not mandatory and doesn't have a default case, so the = question > is what happens if no nodes from the choice has been configured? I = would > expect the choice to have a default case (but this then would apply to > ietf-bfd-types, not this document.) >=20 >=20 Mahesh Jethanandani mjethanandani@gmail.com From nobody Mon Aug 19 12:11:18 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 72882120877; Mon, 19 Aug 2019 12:11:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.501 X-Spam-Level: X-Spam-Status: No, score=-14.501 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=BOP6RWJz; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=dKBvaJzP Received: from mail.ietf.org 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CiAgICA+ICAgICA+ICAgICAgICstLXJ3IGVuYWJsZT8gICAgICAgICAgICAgICAgICAgICAgICAg ICBib29sZWFuDQogICAgPiAgICAgPiAgICAgICArLS1ydyBsb2NhbC1tdWx0aXBsaWVyPyAgICAg ICAgICAgICAgICAgbXVsdGlwbGllcg0KICAgID4gICAgID4gICAgICAgKy0tcncgKGludGVydmFs LWNvbmZpZy10eXBlKT8NCiAgICA+ICAgICA+ICAgICAgICAgICstLToodHgtcngtaW50ZXJ2YWxz KQ0KICAgID4gICAgID4gICAgICAgICAgfCAgKy0tcncgZGVzaXJlZC1taW4tdHgtaW50ZXJ2YWw/ ICAgIHVpbnQzMg0KICAgID4gICAgID4gICAgICAgICAgfCAgKy0tcncgcmVxdWlyZWQtbWluLXJ4 LWludGVydmFsPyAgIHVpbnQzMg0KICAgID4gICAgID4gICAgICAgICAgKy0tOihzaW5nbGUtaW50 ZXJ2YWwpIHtzaW5nbGUtbWluaW11bS1pbnRlcnZhbH0/DQogICAgPiAgICAgPiAgICAgICAgICAg ICArLS1ydyBtaW4taW50ZXJ2YWw/ICAgICAgICAgICAgICAgdWludDMyDQogICAgPiAgICAgPiAN CiAgICA+ICAgICA+IFRoaXMgY2hvaWNlIGlzIG5vdCBtYW5kYXRvcnkgYW5kIGRvZXNuJ3QgaGF2 ZSBhIGRlZmF1bHQgY2FzZSwgc28gdGhlIHF1ZXN0aW9uDQogICAgPiAgICAgPiBpcyB3aGF0IGhh cHBlbnMgaWYgbm8gbm9kZXMgZnJvbSB0aGUgY2hvaWNlIGhhcyBiZWVuIGNvbmZpZ3VyZWQ/ICAg SSB3b3VsZA0KICAgID4gICAgID4gZXhwZWN0IHRoZSBjaG9pY2UgdG8gaGF2ZSBhIGRlZmF1bHQg Y2FzZSAoYnV0IHRoaXMgdGhlbiB3b3VsZCBhcHBseSB0bw0KICAgID4gICAgID4gaWV0Zi1iZmQt dHlwZXMsIG5vdCB0aGlzIGRvY3VtZW50LikNCiAgICA+ICAgICA+IA0KICAgID4gICAgID4gDQog ICAgPiAgICAgDQogICAgPiAgICAgTWFoZXNoIEpldGhhbmFuZGFuaQ0KICAgID4gICAgIG1qZXRo YW5hbmRhbmlAZ21haWwuY29tDQogICAgPiAgICAgDQogICAgPiAgICAgDQogICAgPiAgICAgDQog ICAgPiAgICAgDQogICAgPiANCiAgICANCg0K From nobody Wed Aug 21 12:46:39 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1D2C3120E60; Wed, 21 Aug 2019 12:46:31 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qkxzO2egJawy; Wed, 21 Aug 2019 12:46:28 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 975DD1209EC; Wed, 21 Aug 2019 12:46:28 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id 1BFD81E2F6; Wed, 21 Aug 2019 15:48:47 -0400 (EDT) Date: Wed, 21 Aug 2019 15:48:46 -0400 From: Jeffrey Haas To: "Reshad Rahman (rrahman)" Cc: Greg Mirsky , "Carlos Pignataro (cpignata)" , rtg-bfd WG , "bfd-chairs@ietf.org" , Martin Vigoureux Subject: Re: BFD Echo mode coverage in BFD for VXLAN Message-ID: <20190821194846.GA367@pfrc.org> References: <3747ADED-2F3A-42B8-BD72-20218D167DEE@cisco.com> <2952AB5F-FBD5-4113-BA1B-CD22FC11B58F@cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2952AB5F-FBD5-4113-BA1B-CD22FC11B58F@cisco.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Aug 2019 19:46:38 -0000 Continuing the ugly top-post: There is precedent for BFD Echo not being mentioned as part of other BFD extensions. RFC 5884 explicitly says it's not dealt with in that document. RFC 5885 doesn't mention it at all. As noted previously, and partially in private replies, for vxlan applications BFD Echo might be useful, and may be possible to implement. However, unlike simply BFD Echo for IPv4/IPv6, there are several additional challenges: - You still need the encapsulation defined for the echo packets. - You will need necessary forwarding support for the packet loopback. Presuming a vxlan environment where the necessary loopback behaviors are implemented, and presuming the format for the async packets is documented, Echo procedures might be able to be derived. Supporting Reshad's call, it's up to the Working Group to determine if we want to expand the scope of the document to cover Echo procedures. Carlos, as a member of the Working Group is permitted to ask about such coverage. But it is also within the purview of the Working Group to decide to follow examples such as RFC 5884 and leave Echo explicitly out of scope. -- Jeff Citing RFC 5884, section 6: "Further, the use of the Echo function is outside the scope of this specification." On Thu, Aug 15, 2019 at 10:41:46PM +0000, Reshad Rahman (rrahman) wrote: > It is up to the WG to decide whether echo support is desired for BFD over VxLAN (any other BFD use-cases also). Since this hasn’t been brought up in the WG before, my take is that the WG isn’t interested in having echo for BFD over VxLAN. So if anybody feels that we need echo support, please speak up asap. Because it’s holiday season, let’s take 3 weeks instead of the usual 2, so please respond by September 5th. > > Regards, > Reshad (co-chair hat). > > From: Greg Mirsky > Date: Thursday, August 8, 2019 at 8:04 PM > To: "Carlos Pignataro (cpignata)" > Cc: "rtg-bfd@ietf.org" , "bfd-chairs@ietf.org" , Martin Vigoureux > Subject: Re: BFD Echo mode coverage in BFD for VXLAN > Resent-From: > Resent-To: Jeffrey Haas , > Resent-Date: Thursday, August 8, 2019 at 8:04 PM > > Dear All, > I was pointed out that my previous e-mail asking for WG help to progress BFD over VXLAN document by sharing opinions regarding coverage of the BFD Echo mode may be overstepping the bounds of an Editor. I apologize, that was not my intention. I'm asking WG Chairs to help to arrive at the conclusion of this question in a reasonable time. > > Regards, > Greg > > On Thu, Aug 8, 2019 at 4:06 PM Greg Mirsky > wrote: > Dear All, > I have not set the when this poll closes. I hope that two weeks would be sufficient time for the WG community to express their thoughts. > > Dear Carlos, > thank you for sharing your opinion on the scope of the document in regard to BFD Echo mode. You've expressed support for exploring the applicability of the BFD Echo mode. Would you support that effort by contributing some text, if WG decides that documenting the applicability of the Echo mode in BFD over VXLAN is useful? > > Regards, > Greg > > > On Wed, Aug 7, 2019 at 6:18 PM Carlos Pignataro (cpignata) > wrote: > Dear Greg, > > The option of replacing the existing text for something more ambiguous and implicit does not seem like progress in my humble opinion. The spec ends up with the same capabilities, but the text is more obscure. I do not support that option. > > My recommendation for your consideration would be: > > 1. Explore if it is possible to run BFD Echo as a single-hop. > 2. If yes, add text supporting it. > 3. If no, add text explaining why not on technical grounds. > > A less desirable option would be if the WG does not care about BFD Echo, to explicitly keep it out of scope (not on technical grounds). > > Best, > > Carlos. > > > On Aug 5, 2019, at 6:16 PM, Greg Mirsky > wrote: > > Dear All, > in course of reviews of the draft, several times a question was asked about the rationale for excluding BFD Echo from the scope of this document: > > 7. Echo BFD > > Support for echo BFD is outside the scope of this document. > Much appreciate your consideration of the following options: > > * describe the applicability of BFD Echo in VXLAN environment in the document; > * remove Section 7 and clarify in the Introduction > NEW TEXT: > This specification describes procedures only for BFD Asynchronous mode. > > * make no changes at all. > Regards, > Greg > From nobody Wed Aug 21 13:11:14 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 930981209B1; Wed, 21 Aug 2019 13:11:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8IKgie5j2kAQ; Wed, 21 Aug 2019 13:11:09 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 3D2CE1209A4; Wed, 21 Aug 2019 13:11:09 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id 67BB71E2F6; Wed, 21 Aug 2019 16:13:28 -0400 (EDT) Date: Wed, 21 Aug 2019 16:13:28 -0400 From: Jeffrey Haas To: "Reshad Rahman (rrahman)" Cc: Martin Bjorklund , "mjethanandani@gmail.com" , "yang-doctors@ietf.org" , "rtg-bfd@ietf.org" , "draft-ietf-bfd-unsolicited.all@ietf.org" , "ietf@ietf.org" , "draft-ietf-bfd-yang@ietf.org" Subject: Re: Yangdoctors early review of draft-ietf-bfd-unsolicited-01 Message-ID: <20190821201328.GC367@pfrc.org> References: <156621414936.19813.853283734958376284@ietfa.amsl.com> <0CD4CB48-9382-4724-A5A6-A7B0DE7D7D57@gmail.com> <22279DB9-A0F3-4D5E-BFDC-38B2AD5B109F@cisco.com> <20190819.211837.1184862907842631386.mbj@tail-f.com> <496A5CD5-23C9-4865-BC52-EFC5409475A8@cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <496A5CD5-23C9-4865-BC52-EFC5409475A8@cisco.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Aug 2019 20:11:13 -0000 Reshad, If procedures permit it (I'm unclear on the detail), does it make sense to pull the BFD yang module for a fix from the editor queue? -- Jeff On Mon, Aug 19, 2019 at 07:31:27PM +0000, Reshad Rahman (rrahman) wrote: > I was looking at an old copy of the doc which didn't have default. So yes, mandatory doesn't make sense with the default statements. > > Your assumption below wrt the intention is correct. I don't know how feasible it is to add this while it's in the editor q. > > Regards, > Reshad. > > On 2019-08-19, 3:18 PM, "Martin Bjorklund" wrote: > > "Reshad Rahman (rrahman)" wrote: > > Thanks Martin and Mahesh. > > > > I believe we should add a mandatory statement to the choic (speaking > > as BFD YANG co-author,) > > But then it is not clear why all leafs in the cases have default > statements. > > Since the 'single-interval' case is optional with a if-feature (which > BTW is weird since it is trivial to implement), and the only other > case has default values on both its leafs, I would have assumed that > the intention was that if nothing is configured, the server should use > 1000000 microseconds for the intervals. If this is the intention, > perhaps a statement: "default tx-rx-intervals;" can be added to the > module, even though the doc is in the RFC ed q. > > > /martin > > > > > > > Just created https://github.com/bfd-wg > > > > Regards, > > Reshad. > > > > > > On 2019-08-19, 2:45 PM, "Mahesh Jethanandani" wrote: > > > > [Adding the authors of BFD YANG module] > > > > Martin brings up a good point. But since the document that contains ietf-bfd-types is sitting in RFC Ed Queue, this will have to go into a bis document. > > > > Chairs, could you create a bfd-wg in GitHub for us to track this as an issue to be fixed as part of a bis document? > > > > > On Aug 19, 2019, at 4:29 AM, Martin Björklund via Datatracker wrote: > > > > > > Reviewer: Martin Björklund > > > Review result: Ready with Nits > > > > > > I have reviewed this document from a YANG model perspective only. > > > > > > My only comment is actually for a grouping defined in ietf-bfd-type, but used > > > in this module. There is a choice "interval-config-type": > > > > > > +--rw unsolicited {bfd-unsol:unsolicited-params-global}? > > > +--rw enable? boolean > > > +--rw local-multiplier? multiplier > > > +--rw (interval-config-type)? > > > +--:(tx-rx-intervals) > > > | +--rw desired-min-tx-interval? uint32 > > > | +--rw required-min-rx-interval? uint32 > > > +--:(single-interval) {single-minimum-interval}? > > > +--rw min-interval? uint32 > > > > > > This choice is not mandatory and doesn't have a default case, so the question > > > is what happens if no nodes from the choice has been configured? I would > > > expect the choice to have a default case (but this then would apply to > > > ietf-bfd-types, not this document.) > > > > > > > > > > Mahesh Jethanandani > > mjethanandani@gmail.com > > > > > > > > > > > > From nobody Wed Aug 21 13:14:21 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 625CF1207FE; Wed, 21 Aug 2019 13:14:07 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.5 X-Spam-Level: X-Spam-Status: No, score=-14.5 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=nJxB4Kbz; dkim=pass (1024-bit key) 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Aug 2019 22:33:01 +0000 From: "Reshad Rahman (rrahman)" To: Jeffrey Haas CC: Martin Bjorklund , "mjethanandani@gmail.com" , "yang-doctors@ietf.org" , "rtg-bfd@ietf.org" , "draft-ietf-bfd-unsolicited.all@ietf.org" , "ietf@ietf.org" , "draft-ietf-bfd-yang@ietf.org" Subject: Re: Yangdoctors early review of draft-ietf-bfd-unsolicited-01 Thread-Topic: Yangdoctors early review of draft-ietf-bfd-unsolicited-01 Thread-Index: AQHVVoFcW4RvcvlvFUaeAOxMqn9qZqcCz2yA///ENgCAAEUogP//wIcAgANzdgD//70XgAAE2uwA Date: Wed, 21 Aug 2019 22:33:01 +0000 Message-ID: <1C786A2F-B87F-4D1A-AA6B-1D88252D7069@cisco.com> References: <156621414936.19813.853283734958376284@ietfa.amsl.com> <0CD4CB48-9382-4724-A5A6-A7B0DE7D7D57@gmail.com> <22279DB9-A0F3-4D5E-BFDC-38B2AD5B109F@cisco.com> <20190819.211837.1184862907842631386.mbj@tail-f.com> <496A5CD5-23C9-4865-BC52-EFC5409475A8@cisco.com> <20190821201328.GC367@pfrc.org> <94D8BB16-13A8-41BC-A0AF-B75F99FA667F@cisco.com> In-Reply-To: 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(Postfix) with ESMTP id 3FB20120013; Fri, 23 Aug 2019 07:33:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id A0q0CbKoFpmp; Fri, 23 Aug 2019 07:33:19 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id DDE5812009C; Fri, 23 Aug 2019 07:33:18 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id E00471E2F6; Fri, 23 Aug 2019 10:35:39 -0400 (EDT) Date: Fri, 23 Aug 2019 10:35:39 -0400 From: Jeffrey Haas To: "Reshad Rahman (rrahman)" Cc: Martin Bjorklund , "mjethanandani@gmail.com" , "yang-doctors@ietf.org" , "rtg-bfd@ietf.org" , "draft-ietf-bfd-unsolicited.all@ietf.org" , "ietf@ietf.org" , "draft-ietf-bfd-yang@ietf.org" Subject: Re: Yangdoctors early review of draft-ietf-bfd-unsolicited-01 Message-ID: <20190823143539.GN367@pfrc.org> References: <156621414936.19813.853283734958376284@ietfa.amsl.com> <0CD4CB48-9382-4724-A5A6-A7B0DE7D7D57@gmail.com> <22279DB9-A0F3-4D5E-BFDC-38B2AD5B109F@cisco.com> <20190819.211837.1184862907842631386.mbj@tail-f.com> <496A5CD5-23C9-4865-BC52-EFC5409475A8@cisco.com> <20190821201328.GC367@pfrc.org> <94D8BB16-13A8-41BC-A0AF-B75F99FA667F@cisco.com> <1C786A2F-B87F-4D1A-AA6B-1D88252D7069@cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1C786A2F-B87F-4D1A-AA6B-1D88252D7069@cisco.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Aug 2019 14:33:23 -0000 On Wed, Aug 21, 2019 at 10:33:01PM +0000, Reshad Rahman (rrahman) wrote: > And this is what the changes would look like. That looks fine to me. I don't expect it to be controversial. -- Jeff > > On 2019-08-21, 4:14 PM, "Reshad Rahman (rrahman)" wrote: > > Hi Jeff, > > Yes, to me it makes sense to do the change suggested by Martin (add "default tx-rx-intervals;" to the choice statement). BFD YANG co-authors, please respond asap if you disagree. > > Regards, > Reshad. > > On 2019-08-21, 4:11 PM, "Jeffrey Haas" wrote: > > Reshad, > > If procedures permit it (I'm unclear on the detail), does it make sense to > pull the BFD yang module for a fix from the editor queue? > > -- Jeff > > On Mon, Aug 19, 2019 at 07:31:27PM +0000, Reshad Rahman (rrahman) wrote: > > I was looking at an old copy of the doc which didn't have default. So yes, mandatory doesn't make sense with the default statements. > > > > Your assumption below wrt the intention is correct. I don't know how feasible it is to add this while it's in the editor q. > > > > Regards, > > Reshad. > > > > On 2019-08-19, 3:18 PM, "Martin Bjorklund" wrote: > > > > "Reshad Rahman (rrahman)" wrote: > > > Thanks Martin and Mahesh. > > > > > > I believe we should add a mandatory statement to the choic (speaking > > > as BFD YANG co-author,) > > > > But then it is not clear why all leafs in the cases have default > > statements. > > > > Since the 'single-interval' case is optional with a if-feature (which > > BTW is weird since it is trivial to implement), and the only other > > case has default values on both its leafs, I would have assumed that > > the intention was that if nothing is configured, the server should use > > 1000000 microseconds for the intervals. If this is the intention, > > perhaps a statement: "default tx-rx-intervals;" can be added to the > > module, even though the doc is in the RFC ed q. > > > > > > /martin > > > > > > > > > > > > Just created https://github.com/bfd-wg > > > > > > Regards, > > > Reshad. > > > > > > > > > On 2019-08-19, 2:45 PM, "Mahesh Jethanandani" wrote: > > > > > > [Adding the authors of BFD YANG module] > > > > > > Martin brings up a good point. But since the document that contains ietf-bfd-types is sitting in RFC Ed Queue, this will have to go into a bis document. > > > > > > Chairs, could you create a bfd-wg in GitHub for us to track this as an issue to be fixed as part of a bis document? > > > > > > > On Aug 19, 2019, at 4:29 AM, Martin Björklund via Datatracker wrote: > > > > > > > > Reviewer: Martin Björklund > > > > Review result: Ready with Nits > > > > > > > > I have reviewed this document from a YANG model perspective only. > > > > > > > > My only comment is actually for a grouping defined in ietf-bfd-type, but used > > > > in this module. There is a choice "interval-config-type": > > > > > > > > +--rw unsolicited {bfd-unsol:unsolicited-params-global}? > > > > +--rw enable? boolean > > > > +--rw local-multiplier? multiplier > > > > +--rw (interval-config-type)? > > > > +--:(tx-rx-intervals) > > > > | +--rw desired-min-tx-interval? uint32 > > > > | +--rw required-min-rx-interval? uint32 > > > > +--:(single-interval) {single-minimum-interval}? > > > > +--rw min-interval? uint32 > > > > > > > > This choice is not mandatory and doesn't have a default case, so the question > > > > is what happens if no nodes from the choice has been configured? I would > > > > expect the choice to have a default case (but this then would apply to > > > > ietf-bfd-types, not this document.) > > > > > > > > > > > > > > Mahesh Jethanandani > > > mjethanandani@gmail.com > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Diff: draft-ietf-bfd-yang.txt - draft-ietf-bfd-yang-17.txt > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
< draft-ietf-bfd-yang.txt   draft-ietf-bfd-yang-17.txt >
skipping to change at page 26, line 26 ?? skipping to change at page 26, line 26 ??
} }
} }
<CODE ENDS> <CODE ENDS>
2.13. BFD types YANG Module 2.13. BFD types YANG Module
This YANG module imports typedefs from [RFC6991], [RFC8177] and the This YANG module imports typedefs from [RFC6991], [RFC8177] and the
"control-plane-protocol" identity from [RFC8349]. "control-plane-protocol" identity from [RFC8349].
<CODE BEGINS> file "ietf-bfd-types@2018-08-01.yang" <CODE BEGINS> file "ietf-bfd-types@2019-08-21.yang"
module ietf-bfd-types { module ietf-bfd-types {
yang-version 1.1; yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-types"; namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-types";
prefix "bfd-types"; prefix "bfd-types";
// RFC Ed.: replace occurences of XXXX with actual RFC number and // RFC Ed.: replace occurences of XXXX with actual RFC number and
skipping to change at page 27, line 49 ?? skipping to change at page 27, line 49 ??
to the license terms contained in, the Simplified BSD License to the license terms contained in, the Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents Relating to IETF Documents
(http://trustee.ietf.org/license-info). (http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices."; the RFC itself for full legal notices.";
reference "RFC XXXX"; reference "RFC XXXX";
revision 2018-08-01 { revision 2019-08-21 {
description "Initial revision."; description "Initial revision.";
reference "RFC XXXX: YANG Data Model for BFD"; reference "RFC XXXX: YANG Data Model for BFD";
} }
/* /*
* Feature definitions * Feature definitions
*/ */
feature single-minimum-interval { feature single-minimum-interval {
description description
"This feature indicates that the server supports configuration "This feature indicates that the server supports configuration
of one minimum interval value which is used for both transmit and of one minimum interval value which is used for both transmit and
skipping to change at page 31, line 43 ?? skipping to change at page 31, line 43 ??
grouping base-cfg-parms { grouping base-cfg-parms {
description "BFD grouping for base config parameters."; description "BFD grouping for base config parameters.";
leaf local-multiplier { leaf local-multiplier {
type multiplier; type multiplier;
default 3; default 3;
description "Multiplier transmitted by local system."; description "Multiplier transmitted by local system.";
} }
choice interval-config-type { choice interval-config-type {
default tx-rx-intervals;
description description
"Two interval values or one value used for both transmit and "Two interval values or one value used for both transmit and
receive."; receive.";
case tx-rx-intervals { case tx-rx-intervals {
leaf desired-min-tx-interval { leaf desired-min-tx-interval {
type uint32; type uint32;
units microseconds; units microseconds;
default 1000000; default 1000000;
description description
"Desired minimum transmit interval of control packets."; "Desired minimum transmit interval of control packets.";
 End of changes. 3 change blocks. 
2 lines changed or deleted 3 lines changed or added

This html diff was produced by rfcdiff 1.47. The latest version is available from http://tools.ietf.org/tools/rfcdiff/
> > > From nobody Sun Aug 25 15:23:04 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4EB29120099; Sun, 25 Aug 2019 15:22:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id t_31R6tZtLhy; Sun, 25 Aug 2019 15:22:54 -0700 (PDT) Received: from mail-lj1-x235.google.com (mail-lj1-x235.google.com [IPv6:2a00:1450:4864:20::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0031912008A; Sun, 25 Aug 2019 15:22:53 -0700 (PDT) Received: by mail-lj1-x235.google.com with SMTP id f9so13274116ljc.13; Sun, 25 Aug 2019 15:22:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=8/wurvuuuKsZLM9mPj9SD1cNezETReePcDJOCS104KE=; b=tsByHtO3xi8ZSugKGA+Tca51GYB6O8+hVMr6G0FNdOPm8BoTLTOljdOy7tpAWHARli ES+PTRX0ICN7cZZRNudHEKrHTpKYAlZsOfH1L+noR8UiadirNwpkugG2T5nlgJbfxbke EQacP6qTrqrxaZ0Z6Gka8rLqqvSncT7gkD8aex1K4ejViiQOEJqqw9h/KNmTufvv12Vd pVo8aknQZWb7mp5iy6pokVIl9i3DLLtdt7f0NVzDi1LJ74fykIHpX1igGtUvmnwwH3NB 26o7sKA29IDOG6+bjGN4rPxa0vjh3emvI+2h9jq2giHUfbVmz+9+8gg+hMB2EU4+fsw/ DKmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=8/wurvuuuKsZLM9mPj9SD1cNezETReePcDJOCS104KE=; b=HQEmo3rgmA/2s1iNZLf9X77+sEY2VSwXlUsfSST/vt+sW7BT9naJMKzWzBJAyKqNNe 88dEr46weSQ1JvmCmFJis+7PuVn4OL9C0+2+nM+KLAZWpy/KZzyGWMgCWmS3P0IUdhQG DfV+6oXbBEof89sA5noWW+OhynG4t9ETFG/Q7LRCVxY4On/nWgd6nOCqxwS7W8xHBOPg /WBYOji+alt/Ha8+nzjFtvC9gjEKFrJkhk9l1BKvxfhQ1znG12dXOXQXPQHseOyMomtw 0Q1LmaxA2KzKAbLfk1l9e1nVQzKNhe4G6Ay8xxwyxtQBBoyNqppAslPXuDNWZ4LTs+4C YldA== X-Gm-Message-State: APjAAAVP2cifq+wx7e/buuscnZh5vmKNjNw110T72xqXYwi+Qc0Wg9pm s1kADPz9VnwAf6YfuCr4sMVlxNVAO2jtYn8YkUY= X-Google-Smtp-Source: APXvYqwvVFZiQYFC1oxlGqLq1U0PzaJmnkJlbN/RNZrmKoPPQXZAlINHd5XByvbz7o9e/AtmgtGJEnXZHuIBTc+ddZM= X-Received: by 2002:a2e:7c12:: with SMTP id x18mr9068268ljc.100.1566771772149; Sun, 25 Aug 2019 15:22:52 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Sun, 25 Aug 2019 15:22:34 -0700 Message-ID: Subject: Re: Progress draft-ietf-mpls-bfd-directed To: Mach Chen , mpls@ietf.org Cc: "draft-ietf-mpls-bfd-directed@ietf.org" , "Carlos Pignataro (cpignata)" , "mpls-chairs@ietf.org" , "bfd-chairs@ietf.org" , rtg-bfd WG Content-Type: multipart/alternative; boundary="000000000000ec53930590f87a9a" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Aug 2019 22:22:56 -0000 --000000000000ec53930590f87a9a Content-Type: text/plain; charset="UTF-8" Dear All, in the new section, Operational Considerations , we've described the use of LSP Ping with BFD Reverse Path TLV is described for scenarios of planned and unexpected changes of the FEC to which the reverse direction of a BFD session is tied. We believe that with this update all outstanding technical comments have been addressed. Regards, Geg On Wed, Aug 21, 2019 at 2:12 PM Greg Mirsky wrote: > Hi Mach, et al., > again, thank you for organizing the discussion. I've searched through my > mailbox and the most recent comments went only to MPLS and BFD WGs chairs, > not in WGs archives. Perhaps the discussion thread can still be found as > "Status of draft-ietf-mpls-bfd-directed". > In response to Carlos questions, in the new update of the draft > , we've > added the new section, Operational Considerations. There the use of LSP > Ping with BFD Reverse Path TLV is described for scenarios of planned and > unexpected changes of the FEC to which the reverse direction of a BFD > session is tied. > I think that addresses all the outstanding comments. > > Regards, > Greg > > > > > On Tue, Jul 16, 2019 at 7:49 PM Mach Chen wrote: > >> Dear Colleagues, >> >> The MPLS BFD directed draft ( >> https://tools.ietf.org/html/draft-ietf-mpls-bfd-directed-11 ) has been >> there for a long time. There were quite a lot of discussions between Greg >> and Carlos. The draft has been updated several time to address Carlos's >> comment. Seems there still are some unaddressed comments. Can we find a >> time during the Montreal meeting to discuss the unaddressed comments? And >> hopefully we could find a way to progress the draft. >> >> Since this draft is related to both MPLS and BFD, both working group >> chairs are welcome to join the discussion. >> >> See you in Montreal! >> >> Best regards, >> Mach >> > --000000000000ec53930590f87a9a Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
in the new section, Operat= ional Considerations, we've described the use of LSP Ping with BFD = Reverse Path TLV is described for scenarios of planned and unexpected chang= es of the FEC to which the reverse direction of a BFD session is tied. We b= elieve that with this update all outstanding technical comments have been a= ddressed.

Regards,
Geg

On Wed, Aug 21, 20= 19 at 2:12 PM Greg Mirsky <greg= imirsky@gmail.com> wrote:
Hi Mach, et al.,
again, thank you for= organizing the discussion. I've searched through my mailbox and the mo= st recent comments went only to MPLS and BFD WGs chairs, not in WGs archive= s. Perhaps the discussion thread can still be found as "Status of draf= t-ietf-mpls-bfd-directed".
In response to Carlos questions, = in the new update of the draft, we've added the n= ew section, Operational Considerations. There the use of LSP Ping with BFD = Reverse Path TLV is described for scenarios of planned and unexpected chang= es of the FEC to which the reverse direction of a BFD session is tied.
I think that addresses all the outstanding comments.

Regards,
Greg




On = Tue, Jul 16, 2019 at 7:49 PM Mach Chen <mach.chen@huawei.com> wrote:
Dear Colleagues,

The MPLS BFD directed draft (https://tool= s.ietf.org/html/draft-ietf-mpls-bfd-directed-11 ) has been there for a = long time. There were quite a lot of discussions between Greg and Carlos. T= he draft has been updated several time to address Carlos's comment. See= ms there still are some unaddressed comments. Can we find a time during the= Montreal meeting to discuss the unaddressed comments? And hopefully we cou= ld find a way to progress the draft.

Since this draft is related to both MPLS and BFD, both working group chairs= are welcome to join the discussion.

See you in Montreal!

Best regards,
Mach
--000000000000ec53930590f87a9a-- From nobody Mon Aug 26 12:25:11 2019 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 8AC2E120DAC; Mon, 26 Aug 2019 12:25:09 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: rtg-bfd@ietf.org Subject: I-D Action: draft-ietf-bfd-large-packets-01.txt X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: rtg-bfd@ietf.org Message-ID: <156684750947.30625.15168632018770177030@ietfa.amsl.com> Date: Mon, 26 Aug 2019 12:25:09 -0700 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Aug 2019 19:25:10 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Bidirectional Forwarding Detection WG of the IETF. Title : BFD Encapsulated in Large Packets Authors : Jeffrey Haas Albert Fu Filename : draft-ietf-bfd-large-packets-01.txt Pages : 5 Date : 2019-08-26 Abstract: The Bidirectional Forwarding Detection (BFD) protocol is commonly used to verify connectivity between two systems. BFD packets are typically very small. It is desirable in some circumstances to know that not only is the path between two systems reachable, but also that it is capable of carrying a payload of a particular size. This document discusses thoughts on how to implement such a mechanism using BFD in Asynchronous mode. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-bfd-large-packets/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-bfd-large-packets-01 https://datatracker.ietf.org/doc/html/draft-ietf-bfd-large-packets-01 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-large-packets-01 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Mon Aug 26 15:00:49 2019 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id A154A120FBE; Mon, 26 Aug 2019 15:00:34 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: rtg-bfd@ietf.org Subject: I-D Action: draft-ietf-bfd-secure-sequence-numbers-04.txt X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: rtg-bfd@ietf.org Message-ID: <156685683456.2501.15964935501701041361@ietfa.amsl.com> Date: Mon, 26 Aug 2019 15:00:34 -0700 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Aug 2019 22:00:41 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Bidirectional Forwarding Detection WG of the IETF. Title : Secure BFD Sequence Numbers Authors : Mahesh Jethanandani Sonal Agarwal Ashesh Mishra Ankur Saxena Alan DeKok Filename : draft-ietf-bfd-secure-sequence-numbers-04.txt Pages : 6 Date : 2019-08-26 Abstract: This document describes a security enhancements for the BFD packet's sequence number. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-bfd-secure-sequence-numbers/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-bfd-secure-sequence-numbers-04 https://datatracker.ietf.org/doc/html/draft-ietf-bfd-secure-sequence-numbers-04 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-secure-sequence-numbers-04 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Mon Aug 26 16:03:15 2019 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 0888D120CD7; Mon, 26 Aug 2019 16:03:14 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: rtg-bfd@ietf.org Subject: I-D Action: draft-ietf-bfd-stability-04.txt X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: rtg-bfd@ietf.org Message-ID: <156686059388.2574.3232650001571053079@ietfa.amsl.com> Date: Mon, 26 Aug 2019 16:03:13 -0700 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Aug 2019 23:03:14 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Bidirectional Forwarding Detection WG of the IETF. Title : BFD Stability Authors : Ashesh Mishra Mahesh Jethanandani Ankur Saxena Santosh Pallagatti Mach Chen Peng Fan Filename : draft-ietf-bfd-stability-04.txt Pages : 5 Date : 2019-08-26 Abstract: This document describes extensions to the Bidirectional Forwarding Detection (BFD) protocol to measure BFD stability. Specifically, it describes a mechanism for detection of BFD frame loss. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-bfd-stability-04 https://datatracker.ietf.org/doc/html/draft-ietf-bfd-stability-04 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-stability-04 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Tue Aug 27 08:07:48 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C1F78120820 for ; Tue, 27 Aug 2019 08:07:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jv23_5MCOsaJ for ; Tue, 27 Aug 2019 08:07:42 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 3934212081A for ; Tue, 27 Aug 2019 08:07:42 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id 6C2E11E2F3; Tue, 27 Aug 2019 11:10:07 -0400 (EDT) Date: Tue, 27 Aug 2019 11:10:07 -0400 From: Jeffrey Haas To: rtg-bfd@ietf.org Subject: Changes to BFD Yang module in RFC editors queue (was Re: Yangdoctors early review of draft-ietf-bfd-unsolicited-01) Message-ID: <20190827151007.GJ24671@pfrc.org> References: <156621414936.19813.853283734958376284@ietfa.amsl.com> <0CD4CB48-9382-4724-A5A6-A7B0DE7D7D57@gmail.com> <22279DB9-A0F3-4D5E-BFDC-38B2AD5B109F@cisco.com> <20190819.211837.1184862907842631386.mbj@tail-f.com> <496A5CD5-23C9-4865-BC52-EFC5409475A8@cisco.com> <20190821201328.GC367@pfrc.org> <94D8BB16-13A8-41BC-A0AF-B75F99FA667F@cisco.com> <1C786A2F-B87F-4D1A-AA6B-1D88252D7069@cisco.com> <20190823143539.GN367@pfrc.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20190823143539.GN367@pfrc.org> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Aug 2019 15:07:46 -0000 Working Group, Just to make sure this change is clear from the IETF last call noise, the Yang module authors are proposing a change of a default value to the bfd yang module that is currently with the RFC Editor. The motivation of this change is to make sure that further extensions to that module, the first being for BFD unsolicited, are handled properly. If you have objections to this alteration, please reply to the mailing list before September 13. If no objections are recorded, we'll be asking our AD to shepherd that alteration through the RFC Editor. NOTE: Resolving this item is the only current hold-up on issuing WGLC on the BFD Unsolicted draft. -- Jeff On Fri, Aug 23, 2019 at 10:35:39AM -0400, Jeffrey Haas wrote: > On Wed, Aug 21, 2019 at 10:33:01PM +0000, Reshad Rahman (rrahman) wrote: > > And this is what the changes would look like. > > That looks fine to me. I don't expect it to be controversial. > > -- Jeff > > > > > On 2019-08-21, 4:14 PM, "Reshad Rahman (rrahman)" wrote: > > > > Hi Jeff, > > > > Yes, to me it makes sense to do the change suggested by Martin (add "default tx-rx-intervals;" to the choice statement). BFD YANG co-authors, please respond asap if you disagree. > > > > Regards, > > Reshad. > > > > On 2019-08-21, 4:11 PM, "Jeffrey Haas" wrote: > > > > Reshad, > > > > If procedures permit it (I'm unclear on the detail), does it make sense to > > pull the BFD yang module for a fix from the editor queue? > > > > -- Jeff > > > > On Mon, Aug 19, 2019 at 07:31:27PM +0000, Reshad Rahman (rrahman) wrote: > > > I was looking at an old copy of the doc which didn't have default. So yes, mandatory doesn't make sense with the default statements. > > > > > > Your assumption below wrt the intention is correct. I don't know how feasible it is to add this while it's in the editor q. > > > > > > Regards, > > > Reshad. > > > > > > On 2019-08-19, 3:18 PM, "Martin Bjorklund" wrote: > > > > > > "Reshad Rahman (rrahman)" wrote: > > > > Thanks Martin and Mahesh. > > > > > > > > I believe we should add a mandatory statement to the choic (speaking > > > > as BFD YANG co-author,) > > > > > > But then it is not clear why all leafs in the cases have default > > > statements. > > > > > > Since the 'single-interval' case is optional with a if-feature (which > > > BTW is weird since it is trivial to implement), and the only other > > > case has default values on both its leafs, I would have assumed that > > > the intention was that if nothing is configured, the server should use > > > 1000000 microseconds for the intervals. If this is the intention, > > > perhaps a statement: "default tx-rx-intervals;" can be added to the > > > module, even though the doc is in the RFC ed q. > > > > > > > > > /martin > > > > > > > > > > > > > > > > > Just created https://github.com/bfd-wg > > > > > > > > Regards, > > > > Reshad. > > > > > > > > > > > > On 2019-08-19, 2:45 PM, "Mahesh Jethanandani" wrote: > > > > > > > > [Adding the authors of BFD YANG module] > > > > > > > > Martin brings up a good point. But since the document that contains ietf-bfd-types is sitting in RFC Ed Queue, this will have to go into a bis document. > > > > > > > > Chairs, could you create a bfd-wg in GitHub for us to track this as an issue to be fixed as part of a bis document? > > > > > > > > > On Aug 19, 2019, at 4:29 AM, Martin Björklund via Datatracker wrote: > > > > > > > > > > Reviewer: Martin Björklund > > > > > Review result: Ready with Nits > > > > > > > > > > I have reviewed this document from a YANG model perspective only. > > > > > > > > > > My only comment is actually for a grouping defined in ietf-bfd-type, but used > > > > > in this module. There is a choice "interval-config-type": > > > > > > > > > > +--rw unsolicited {bfd-unsol:unsolicited-params-global}? > > > > > +--rw enable? boolean > > > > > +--rw local-multiplier? multiplier > > > > > +--rw (interval-config-type)? > > > > > +--:(tx-rx-intervals) > > > > > | +--rw desired-min-tx-interval? uint32 > > > > > | +--rw required-min-rx-interval? uint32 > > > > > +--:(single-interval) {single-minimum-interval}? > > > > > +--rw min-interval? uint32 > > > > > > > > > > This choice is not mandatory and doesn't have a default case, so the question > > > > > is what happens if no nodes from the choice has been configured? I would > > > > > expect the choice to have a default case (but this then would apply to > > > > > ietf-bfd-types, not this document.) > > > > > > > > > > > > > > > > > > Mahesh Jethanandani > > > > mjethanandani@gmail.com > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Diff: draft-ietf-bfd-yang.txt - draft-ietf-bfd-yang-17.txt > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
< draft-ietf-bfd-yang.txt   draft-ietf-bfd-yang-17.txt >
skipping to change at page 26, line 26 ?? skipping to change at page 26, line 26 ??
} }
} }
<CODE ENDS> <CODE ENDS>
2.13. BFD types YANG Module 2.13. BFD types YANG Module
This YANG module imports typedefs from [RFC6991], [RFC8177] and the This YANG module imports typedefs from [RFC6991], [RFC8177] and the
"control-plane-protocol" identity from [RFC8349]. "control-plane-protocol" identity from [RFC8349].
<CODE BEGINS> file "ietf-bfd-types@2018-08-01.yang" <CODE BEGINS> file "ietf-bfd-types@2019-08-21.yang"
module ietf-bfd-types { module ietf-bfd-types {
yang-version 1.1; yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-types"; namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-types";
prefix "bfd-types"; prefix "bfd-types";
// RFC Ed.: replace occurences of XXXX with actual RFC number and // RFC Ed.: replace occurences of XXXX with actual RFC number and
skipping to change at page 27, line 49 ?? skipping to change at page 27, line 49 ??
to the license terms contained in, the Simplified BSD License to the license terms contained in, the Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents Relating to IETF Documents
(http://trustee.ietf.org/license-info). (http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices."; the RFC itself for full legal notices.";
reference "RFC XXXX"; reference "RFC XXXX";
revision 2018-08-01 { revision 2019-08-21 {
description "Initial revision."; description "Initial revision.";
reference "RFC XXXX: YANG Data Model for BFD"; reference "RFC XXXX: YANG Data Model for BFD";
} }
/* /*
* Feature definitions * Feature definitions
*/ */
feature single-minimum-interval { feature single-minimum-interval {
description description
"This feature indicates that the server supports configuration "This feature indicates that the server supports configuration
of one minimum interval value which is used for both transmit and of one minimum interval value which is used for both transmit and
skipping to change at page 31, line 43 ?? skipping to change at page 31, line 43 ??
grouping base-cfg-parms { grouping base-cfg-parms {
description "BFD grouping for base config parameters."; description "BFD grouping for base config parameters.";
leaf local-multiplier { leaf local-multiplier {
type multiplier; type multiplier;
default 3; default 3;
description "Multiplier transmitted by local system."; description "Multiplier transmitted by local system.";
} }
choice interval-config-type { choice interval-config-type {
default tx-rx-intervals;
description description
"Two interval values or one value used for both transmit and "Two interval values or one value used for both transmit and
receive."; receive.";
case tx-rx-intervals { case tx-rx-intervals {
leaf desired-min-tx-interval { leaf desired-min-tx-interval {
type uint32; type uint32;
units microseconds; units microseconds;
default 1000000; default 1000000;
description description
"Desired minimum transmit interval of control packets."; "Desired minimum transmit interval of control packets.";
 End of changes. 3 change blocks. 
2 lines changed or deleted 3 lines changed or added

This html diff was produced by rfcdiff 1.47. The latest version is available from http://tools.ietf.org/tools/rfcdiff/
> > > > > > From nobody Tue Aug 27 08:14:56 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 021591200CD for ; Tue, 27 Aug 2019 08:14:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vBo9Bgm7KhTv for ; Tue, 27 Aug 2019 08:14:53 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 1F9B212006F for ; Tue, 27 Aug 2019 08:14:53 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id 74CC31E2F3; Tue, 27 Aug 2019 11:17:18 -0400 (EDT) Date: Tue, 27 Aug 2019 11:17:18 -0400 From: Jeffrey Haas To: rtg-bfd@ietf.org Subject: Working Group Last Call on BFD Authentication Documents (expires September 13, 2019) Message-ID: <20190827151718.GK24671@pfrc.org> References: <20190216170740.GA31558@pfrc.org> <20190702183714.GB3974@pfrc.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190702183714.GB3974@pfrc.org> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Aug 2019 15:14:55 -0000 Working Group, As we discussed in Montreal at IETF-105, the last hang up on progressing the authentication documents (thread copied below) was concerns on the IPR against them. The holder of the IPR believes their discloures are consistent with prior IPR posted against the BFD suite of published RFCs.o We are thus proceeding with the Working Group Last Call for these documents. You are encouraged to provide technical feedback for the contents of the documents, which addresses providing stronger authentication on the BFD protocol. Please indicate whether you believe these documents should be advanced to the IESG for publication as RFCs. -- Jeff and Reshad On Tue, Jul 02, 2019 at 02:37:15PM -0400, Jeffrey Haas wrote: > Working Group, > > A followup on this item. > > Currently, the status is identical to that which was last posted. Mahesh > did make contact with Ciena IPR holders regarding the state of the license. > It is their belief that their disclosure is consistent with similar IPR > filed against BFD. Citing two similar ones: > > https://datatracker.ietf.org/ipr/516/ > https://datatracker.ietf.org/ipr/1419/ > > It also appears to be their belief that the current wording doesn't require > that a license fee is due. However, this is private commentary. > > At this point, my recommendation to the working group is we decide if we'll > proceed with the publication process. Let's use this time prior to IETF 105 > to discuss any pending issues on these documents. > > -- Jeff > > On Sat, Feb 16, 2019 at 12:07:40PM -0500, Jeffrey Haas wrote: > > Working Group, > > > > On March 28, 2018, we started Working Group Last Call on the following document > > bundle: > > > > draft-ietf-bfd-secure-sequence-numbers > > draft-ietf-bfd-optimizing-authentication > > draft-ietf-bfd-stability > > > > The same day, Mahesh Jethanandani acknowledged there was pending IPR > > declarations against these drafts. An IPR declaration was finally posted on > > November 1, 2018. In particular, it notes a patent. The licenseing is > > RAND. > > > > https://datatracker.ietf.org/ipr/3328/ > > > > In the time since the WGLC was requested, there were a number of technical > > comments made on these drafts. It's my belief that all substantial > > technical comments had been addressed in the last posted version of these > > documents. Note that there was one lingering comment about Yang > > considerations for the BFD module with regard to enabling this optimized > > authentication mode which can be dealt with separably. > > > > The chairs did not carry out a further consensus call to ensure that there > > are no further outstanding technical issues. > > > > On November 21, Greg Mirsky indicated an objection to progressing the > > document due to late disclosure. > > > > https://mailarchive.ietf.org/arch/msg/rtg-bfd/u8rvWwvDWRKI3jseGHecAB9WtDo > > > > Since we are a little over a month prior to the upcoming IETF 104, this > > seems a good time to try to decide how the Working Group shall finish this > > work. Since we are meeting in Prague, this may progress to microphone > > conversation. > > > > For the moment, the chairs' perceived status of the documents are: > > - No pending technical issues with the documents with one known issue. > > - Concerns over late disclosure of IPR. > > - No solid consensus from the Working Group that we're ready to proceed. > > This part may be covered by a future consensus call, but let's hear list > > discussion first. > > > > -- Jeff From nobody Tue Aug 27 09:33:53 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D74D412083C for ; Tue, 27 Aug 2019 09:33:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.5 X-Spam-Level: X-Spam-Status: No, score=-14.5 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, 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DQo8L2h0bWw+DQo= --_000_CEA4D1E54F1A4E46A55027C2C64EBC9Dciscocom_-- From nobody Tue Aug 27 14:57:06 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 148EA1201EF; Tue, 27 Aug 2019 14:57:04 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NWdfJfrQdXA9; Tue, 27 Aug 2019 14:57:02 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 69E93120145; Tue, 27 Aug 2019 14:56:59 -0700 (PDT) Received: from [10.103.152.187] (mobile-166-177-57-194.mycingular.net [166.177.57.194]) by slice.pfrc.org (Postfix) with ESMTPSA id 081371E2F2; Tue, 27 Aug 2019 17:59:24 -0400 (EDT) Content-Type: multipart/alternative; boundary=Apple-Mail-C46C8495-047F-4EEE-92DB-B48707A1767C Mime-Version: 1.0 (1.0) Subject: Re: IPR poll for draft-ietf-bfd-large-packets From: Jeffrey Haas X-Mailer: iPhone Mail (16G77) In-Reply-To: Date: Tue, 27 Aug 2019 17:56:56 -0400 Cc: "draft-ietf-bfd-large-packets@ietf.org" , "rtg-bfd@ietf.org" Content-Transfer-Encoding: 7bit Message-Id: <5040901F-C4D9-49C3-91F5-63E7B4346FAB@pfrc.org> References: To: "Reshad Rahman (rrahman)" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Aug 2019 21:57:04 -0000 --Apple-Mail-C46C8495-047F-4EEE-92DB-B48707A1767C Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable I am unaware of any applicable IPR.=20 Jeff > On Aug 27, 2019, at 17:25, Reshad Rahman (rrahman) wro= te: >=20 > BFD WG, authors, contributors, > =20 > We have started WGLC for draft-ietf-bfd-large-packets and need to do an IP= R poll. This mail starts the IPR poll. > =20 > Are you aware of any IPR that applies to draft-ietf-bfd-large-packets? > =20 > If you are aware of a relevant IPR, please state whether this IPR has been= disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5= 378 for more details). > =20 > At this moment, no IPR disclosures have been submitted on this document or= the individual document it replaced. > =20 > If you are listed as a document author or contributor, please reply to thi= s email (reply-to-all) stating whether or not you are aware of any relevant I= PR. > If you are on the BFD WG email list but are not listed as an author or con= tributor, then please explicitly reply only if you are aware of any IPR that= has not yet been disclosed in conformance with IETF rules. > =20 > Please note that the document will not advance to the next stage unless a r= esponse has been received from each author and contributor. > =20 > This poll closes on the 13th of September 2019. > =20 > Regards, > Reshad. > =20 --Apple-Mail-C46C8495-047F-4EEE-92DB-B48707A1767C Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit I am unaware of any applicable IPR. 

Jeff

On Aug 27, 2019, at 17:25, Reshad Rahman (rrahman) <rrahman@cisco.com> wrote:

BFD WG, authors, contributors,

 

We have started WGLC for draft-ietf-bfd-large-packets and need to do an IPR poll. This mail starts the IPR poll.

 

Are you aware of any IPR that applies to draft-ietf-bfd-large-packets?

 

If you are aware of a relevant IPR, please state whether this IPR has been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

 

At this moment, no IPR disclosures have been submitted on this document or the individual document it replaced.

 

If you are listed as a document author or contributor, please reply to this email (reply-to-all) stating whether or not you are aware of any relevant IPR.

If you are on the BFD WG email list but are not listed as an author or contributor, then please explicitly reply only if you are aware of any IPR that has not yet been disclosed in conformance with IETF rules.

 

Please note that the document will not advance to the next stage unless a response has been received from each author and contributor.

 

This poll closes on the 13th of September 2019.

 

Regards,

Reshad.

 

--Apple-Mail-C46C8495-047F-4EEE-92DB-B48707A1767C-- From nobody Wed Aug 28 09:18:04 2019 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9BF321201DE; Wed, 28 Aug 2019 09:18:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.199 X-Spam-Level: X-Spam-Status: No, score=-4.199 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RAPT_pBxe6FP; Wed, 28 Aug 2019 09:17:58 -0700 (PDT) Received: from mgnj5.bloomberg.net (mgnj5.bloomberg.net [69.191.244.207]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6FFD1120059; Wed, 28 Aug 2019 09:17:58 -0700 (PDT) X-BB-Reception-Complete: 28 Aug 2019 12:17:57 -0400 X-IP-Listener: Outgoing Mail X-IP-MID: 1051999607 Received: from msllnjpmsgsv06.bloomberg.com (HELO msllnjpmsgsv06) ([10.126.134.166]) by mgnj5.bloomberg.net with SMTP; 28 Aug 2019 12:17:57 -0400 X-BLP-INETSVC: version=BLP_APP_S_INETSVC_1.0.1; host=mgnj5:25; conid=149 Date: Wed, 28 Aug 2019 16:17:57 -0000 From: "Albert Fu (BLOOMBERG/ 120 PARK)" Reply-To: "Albert Fu" To: draft-ietf-bfd-large-packets@ietf.org, rtg-bfd@ietf.org, rrahman@cisco.com MIME-Version: 1.0 Message-ID: <5D66A93500F6035A00390644_0_44242@msllnjpmsgsv06> X-BLP-GUID: 5D66A93500F6035A003906440000 Subject: =?UTF-8?B?UmU6SVBSIHBvbGwgZm9yIGRyYWZ0LWlldGYtYmZkLWxhcmdlLXBhY2tldHM=?= Content-Type: multipart/alternative; boundary="BOUNDARY_5D66A93500F6035A00390644_0_59863_msllnjpmsgsv06" Content-ID: Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional 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