From nobody Wed Jul 1 18:22:26 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F1F0D1B2CB7 for ; Wed, 1 Jul 2015 18:22:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 1CnHxfNCRjwA for ; Wed, 1 Jul 2015 18:22:22 -0700 (PDT) Received: from alln-iport-1.cisco.com (alln-iport-1.cisco.com [173.37.142.88]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3F5BB1B2CC3 for ; Wed, 1 Jul 2015 18:22:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=17882; q=dns/txt; s=iport; t=1435800142; x=1437009742; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=t2l0UzYNBi3XZ0lAm0P+cTnCLOv71ukvqQ79Ysy86rc=; b=lpD2IF70XbOJxF3uGhSdNflxUdO6gvL+m0SVc6WAuQe1DqzGChBhhE8y 0mzblMNmFQYnaBFe+XU4XiaioZtjphYvJfKz9WAkAPQP7Q/Q3d1FA4Pfs eX13mTrU99XLomkN8T5b1CCAIu/90opFb1GCFsnNGniGPe1UDQF44NUJj A=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0CzAwCNkZRV/5tdJa1bgkVNVF8GvTMJh2YCgUo4FAEBAQEBAQGBCoQiAQEBBC0aMBICAQgRAwEBASgHIREUCQgCBAESH4d7AxK7MotIDYVwAQEBAQEBAQEBAQEBAQEBAQEBAQEBF4tKgk2BTVsXAYQrAQSRLoJiAYl9gWOBOo9xgz2DXSaDem+BRoECAQEB X-IronPort-AV: E=Sophos;i="5.15,389,1432598400"; d="scan'208,217";a="164850406" Received: from rcdn-core-4.cisco.com ([173.37.93.155]) by alln-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 02 Jul 2015 01:22:21 +0000 Received: from xhc-aln-x05.cisco.com (xhc-aln-x05.cisco.com [173.36.12.79]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id t621MLh2008962 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 2 Jul 2015 01:22:21 GMT Received: from xmb-rcd-x03.cisco.com ([169.254.7.52]) by xhc-aln-x05.cisco.com ([173.36.12.79]) with mapi id 14.03.0195.001; Wed, 1 Jul 2015 20:22:20 -0500 From: "Reshad Rahman (rrahman)" To: Shahram Davari , Santosh P K , "S. Davari" , "rtg-bfd@ietf.org" Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Topic: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Index: AQHQsEzmEknWHHNqr0WZplypYqzrJZ3AKHaggACBqID//7a8kIAD63tCgADRIgCAAQ8wgIABTpaA Date: Thu, 2 Jul 2015 01:22:20 +0000 Message-ID: References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> In-Reply-To: <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.2.150604 x-originating-ip: [10.86.249.243] Content-Type: multipart/alternative; boundary="_000_D1BA0991CED35rrahmanciscocom_" MIME-Version: 1.0 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 02 Jul 2015 01:22:25 -0000 --_000_D1BA0991CED35rrahmanciscocom_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi Shahram, I agree that running BFD between VTEPs per VNI might not scale well. But by= just running BFD on the IP tunnel IMO you won=92t detect certain problems,= maybe hypothetical, such as the UDP port being blocked (e.g. Due to a misc= onfigured ACL). Regards, Reshad. From: Rtg-bfd > o= n behalf of Shahram Davari = > Date: Tuesday, June 30, 2015 at 9:24 PM To: Santosh P K >, "S. = Davari" >, = "rtg-bfd@ietf.org" > Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Santosh, Is the BFD you are describing in your draft unicast or multicast? If unica= st then service nodes would not apply. Also if there is a service node then one can run BFD on the IP tunnel betwe= en source VTEP and service node and between service node and the destinatio= n VTEP. This is much more scalable than running end-to-end BFD between VTEP= s per VNI. You could even use such BFD to switch to a backup service node i= f there is failure to the main service node. Thx Shahram From: Santosh P K [mailto:santoshpk@juniper.net] Sent: Tuesday, June 30, 2015 2:14 AM To: S. Davari; Shahram Davari; rtg-bfd@ietf.org Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t There can be few VTEPs who might have capabilities to multicast the packet.= In such a scenario VTEP will send that packet to service node and service = node will do a multicast on its behalf. Thanks Santosh P K From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari Sent: Monday, June 29, 2015 10:48 AM To: Shahram Davari; rtg-bfd@ietf.org Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi What is a service node? Thx Sd Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram Regards, Shahram On Jun 27, 2015, at 7:06 AM, Shahram Davari > wrote: Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram --_000_D1BA0991CED35rrahmanciscocom_ Content-Type: text/html; charset="Windows-1252" Content-ID: <25BAE67DF88DBE4CA351CE56871912B8@emea.cisco.com> Content-Transfer-Encoding: quoted-printable
Hi Shahram,

I agree that running BFD between VTEPs per VNI might not scale well. B= ut by just running BFD on the IP tunnel IMO you won=92t detect certain prob= lems, maybe hypothetical, such as the UDP port being blocked (e.g. Due to a= misconfigured ACL).

Regards,
Reshad.

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Sh= ahram Davari <davari@broadcom.com= >
Date: Tuesday, June 30, 2015 at 9:2= 4 PM
To: Santosh P K <santoshpk@juniper.net>, "S. Davari&qu= ot; <realestate.davari@gm= ail.com>, "rtg-bfd@ietf.org= " <rtg-bfd@ietf.org>
Subject: RE: New Version Notificati= on for draft-spallagatti-bfd-vxlan-00.txt

Santosh,

 

Is the BFD you  are describing= in your draft unicast or multicast? If unicast then service nodes would no= t apply.

 

Also if there is a service node the= n one can run BFD on the IP tunnel between source VTEP and service node and= between service node and the destination VTEP. This is much more scalable than running end-to-end BFD between VTEPs= per VNI. You could even use such BFD to switch to a backup service node if= there is failure to the main service node.

 

Thx

Shahram

 

From: Santosh P K [mailto:santoshpk@juniper.net]
Sent: Tuesday, June 30, 2015 2:14 AM
To: S. Davari; Shahram Davari; r= tg-bfd@ietf.org
Subject: RE: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

 

There can be few VTEPs who might ha= ve capabilities to multicast the packet. In such a scenario VTEP will send = that packet to service node and service node will do a multicast on its behalf.

 

 

Thanks

Santosh P K

 

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari
Sent: Monday, June 29, 2015 10:48 AM
To: Shahram Davari; rtg-bfd@ietf= .org
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

 

Hi

 

What is a service node?

 

Thx

 

Sd

 

 

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . 

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. 

Regards,
Shahram

Regards,

Shahram

 


On Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.com> wrote:

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag.

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag.
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= .

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel.

Regards,
Shahram

 --_000_D1BA0991CED35rrahmanciscocom_-- From nobody Wed Jul 1 21:25:32 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 97AB71A88F2 for ; Wed, 1 Jul 2015 21:25:30 -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, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=ham 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 sk1lsQuUFgmH for ; Wed, 1 Jul 2015 21:25:27 -0700 (PDT) Received: from mail-pd0-x229.google.com (mail-pd0-x229.google.com [IPv6:2607:f8b0:400e:c02::229]) (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 A9C361A88E2 for ; Wed, 1 Jul 2015 21:25:27 -0700 (PDT) Received: by pdjd13 with SMTP id d13so37518777pdj.0 for ; Wed, 01 Jul 2015 21:25:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :message-id:references:to; bh=4acfo6tfSiol370WM01mcr4+dA+qutXSTLls26Lqn5E=; b=PpAXonIZt47ytcWP0+MCTy40JVMa+FwlKIjTgKZ62QAD+i7VygR1+IfNibDj0sboXW LIFtGcjSwLijXwIAFmtzP2SLoW76nRMX84fcFdCHi0Pu3c5zZWmdvNqhtEMPprY1H8fo zfGBqtYmMPQuaIJU7HKU2KsNtfI2pC2FKhoTBuyA0+KO7Otg0Mvokx82suYF9fK/M3X3 ZMnnlR4HP8mrTPXtrmmv1WO0Gna4BXI5R5jODtD4w/EEA8CXGNTnhff6555/K1ObIrhb couJHpD0S8OirtbI50HjHtS7A6/+wDw5UWGVwBewLOTpoyW7nXlzOAzvyVJCwabuLNyy MyHQ== X-Received: by 10.68.143.38 with SMTP id sb6mr62408714pbb.132.1435811127334; Wed, 01 Jul 2015 21:25:27 -0700 (PDT) Received: from ?IPv6:2602:306:ccab:b70:51f1:eb:7a1f:baab? ([2602:306:ccab:b70:51f1:eb:7a1f:baab]) by mx.google.com with ESMTPSA id pr5sm3912816pbc.63.2015.07.01.21.25.24 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 01 Jul 2015 21:25:25 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_6DA5C271-3886-40CC-86EA-BF912AAA584B" Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt From: Shahram Davari In-Reply-To: Date: Wed, 1 Jul 2015 21:25:22 -0700 Message-Id: <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> To: "Reshad Rahman (rrahman)" X-Mailer: Apple Mail (2.2098) Archived-At: Cc: Shahram Davari , "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 02 Jul 2015 04:25:30 -0000 --Apple-Mail=_6DA5C271-3886-40CC-86EA-BF912AAA584B Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Hi Reshad, You don=92t need to run continuous BFD session per VNI to detect UDP = port configuration issue. To justify running BFD per VNI, one needs to = show that the forwarding of each of those BFD sessions depends on = specific VNI value. =20 Thx Shahram > On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) = wrote: >=20 > Hi Shahram, >=20 > I agree that running BFD between VTEPs per VNI might not scale well. = But by just running BFD on the IP tunnel IMO you won=92t detect certain = problems, maybe hypothetical, such as the UDP port being blocked (e.g. = Due to a misconfigured ACL). >=20 > Regards, > Reshad. >=20 > From: Rtg-bfd > on behalf of Shahram Davari = > > Date: Tuesday, June 30, 2015 at 9:24 PM > To: Santosh P K >, "S. Davari" = >, = "rtg-bfd@ietf.org " > > Subject: RE: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt >=20 > Santosh, > =20 > Is the BFD you are describing in your draft unicast or multicast? If = unicast then service nodes would not apply. > =20 > Also if there is a service node then one can run BFD on the IP tunnel = between source VTEP and service node and between service node and the = destination VTEP. This is much more scalable than running end-to-end BFD = between VTEPs per VNI. You could even use such BFD to switch to a backup = service node if there is failure to the main service node. > =20 > Thx > Shahram > =20 > From: Santosh P K [mailto:santoshpk@juniper.net = ]=20 > Sent: Tuesday, June 30, 2015 2:14 AM > To: S. Davari; Shahram Davari; rtg-bfd@ietf.org = > Subject: RE: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > There can be few VTEPs who might have capabilities to multicast the = packet. In such a scenario VTEP will send that packet to service node = and service node will do a multicast on its behalf.=20 > =20 > =20 > Thanks > Santosh P K > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org = ] On Behalf Of S. Davari > Sent: Monday, June 29, 2015 10:48 AM > To: Shahram Davari; rtg-bfd@ietf.org > Subject: Re: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Hi > =20 > What is a service node? > =20 > Thx > =20 > Sd > =20 > =20 >> Hi Prasad , >>=20 >> I don't see how you get more coverage having a VXLAN tag.=20 >>=20 >> Since you are not testing the VXLAN based VFI/VRF forwarding. By that = I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. >> GVP1> One of the aspects of the next version of the draft will have a = valid inner DIP instead of 127/8. This should help address your concern = to an extent. >> Also you are not testing the mapping from AC (Attachment Circuit) to = a VXLAN tag.=20 >> GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as = well, not using it as an excuse but I am just noting the precedent here. >>=20 >> In my opinion all you are testing, is that at the other end of an IP = Tunnel a specific VXLAN exist or not. Which does not require running = continuous BFD. >> GVP1> There are specific use-cases (see note about Service Node = reachability in Sec 2 of the draft) that require continuous monitoring = of some special-purpose VTEPs. >>=20 >> In my opinion this is a very in efficient way of getting that = information. The controller should be able to get this information much = more efficiently.=20 >>=20 >> It would be good if you can provide an example of what you think is = more coverage than BFD. Or at least what extra coverage do you exactly = have in mind, since this draft is not capable of more coverage than = standard BFD over the IP tunnel.=20 >>=20 >> Regards, >> Shahram > Regards, > Shahram > =20 >=20 > On Jun 27, 2015, at 7:06 AM, Shahram Davari > wrote: >=20 >> Hi Prasad , >>=20 >> I don't see how you get more coverage having a VXLAN tag.=20 >>=20 >> Since you are not testing the VXLAN based VFI/VRF forwarding. By that = I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. >> GVP1> One of the aspects of the next version of the draft will have a = valid inner DIP instead of 127/8. This should help address your concern = to an extent. >> Also you are not testing the mapping from AC (Attachment Circuit) to = a VXLAN tag.=20 >> GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as = well, not using it as an excuse but I am just noting the precedent here. >>=20 >> In my opinion all you are testing, is that at the other end of an IP = Tunnel a specific VXLAN exist or not. Which does not require running = continuous BFD. >> GVP1> There are specific use-cases (see note about Service Node = reachability in Sec 2 of the draft) that require continuous monitoring = of some special-purpose VTEPs. >>=20 >> In my opinion this is a very in efficient way of getting that = information. The controller should be able to get this information much = more efficiently.=20 >>=20 >> It would be good if you can provide an example of what you think is = more coverage than BFD. Or at least what extra coverage do you exactly = have in mind, since this draft is not capable of more coverage than = standard BFD over the IP tunnel.=20 >>=20 >> Regards, >> Shahram --Apple-Mail=_6DA5C271-3886-40CC-86EA-BF912AAA584B Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Hi Reshad,

You don=92t need to run continuous  BFD session per VNI = to detect UDP port configuration issue. To justify running BFD per VNI, = one needs to show that the forwarding of each of those BFD sessions = depends on specific VNI value.   

Thx
Shahram

On Jul 1, 2015, at 6:22 PM, = Reshad Rahman (rrahman) <rrahman@cisco.com> wrote:

Hi Shahram,

I agree that running BFD between VTEPs = per VNI might not scale well. But by just running BFD on the IP tunnel = IMO you won=92t detect certain problems, maybe hypothetical, such as the = UDP port being blocked (e.g. Due to a misconfigured = ACL).

Regards,
Reshad.

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> = on behalf of Shahram Davari <davari@broadcom.com>
Date: Tuesday, June 30, = 2015 at 9:24 PM
To: Santosh P K <santoshpk@juniper.net>, = "S. Davari" <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt

Santosh,
 
Is the BFD you  = are describing in your draft unicast or multicast? If unicast then = service nodes would not apply.
 
Also if there is a = service node then one can run BFD on the IP tunnel between source VTEP = and service node and between service node and the destination VTEP. This = is much more scalable than running end-to-end BFD between VTEPs per VNI. = You could even use such BFD to switch to a backup service node if there = is failure to the main service node.
 
Thx
Shahram
 
From: Santosh P = K [mailto:santoshpk@juniper.net] 
Sent: Tuesday, June 30, 2015 2:14 = AM
To: S. Davari; Shahram = Davari; rtg-bfd@ietf.org
Subject: RE: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt
 
There can be few VTEPs = who might have capabilities to multicast the packet. In such a scenario = VTEP will send that packet to service node and service node will do a = multicast on its behalf. 
 
 
Thanks
Santosh P K
 
From: Rtg-bfd = [mailto:rtg-bfd-bounces@ietf.org] On Behalf = Of S. Davari
Sent: Monday, June 29, 2015 10:48 = AM
To: Shahram Davari; rtg-bfd@ietf.org
Subject: Re: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt
 
Hi
 
What is a service node?
 
Thx
 
Sd
 
 
Hi Prasad ,

I don't = see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. = By that I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) = forwarding.
GVP1> One of the aspects of the next = version of the draft will have a valid inner DIP instead of 127/8. This = should help address your concern to an extent.
Also you = are not testing the mapping from AC (Attachment Circuit) to a VXLAN = tag. 
GVP1> Agreed, this aspect has not (yet) been = addressed by RFC5884 as well, not using it as an excuse but I am just = noting the precedent here.

In my opinion = all you are testing, is that at the other end of an IP Tunnel a specific = VXLAN exist or not. Which does not require running continuous BFD.
GVP1> There are specific use-cases (see note about Service = Node reachability in Sec 2 of the draft) that require continuous = monitoring of some special-purpose VTEPs.

In = my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more = efficiently. 

It would be good if you = can provide an example of what you think is more coverage than BFD. Or = at least what extra coverage do you exactly have in mind, since this = draft is not capable of more coverage than standard BFD over the IP = tunnel. 

Regards,
Shahram
Regards,
Shahram
 


On= Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.com> = wrote:

Hi Prasad ,

I don't see = how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. = By that I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) = forwarding.
GVP1> One of the aspects of the next = version of the draft will have a valid inner DIP instead of 127/8. This = should help address your concern to an extent.
Also you = are not testing the mapping from AC (Attachment Circuit) to a VXLAN = tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by = RFC5884 as well, not using it as an excuse but I am just noting the = precedent here.

In my opinion all you are = testing, is that at the other end of an IP Tunnel a specific VXLAN exist = or not. Which does not require running continuous BFD.
GVP1> There are specific use-cases (see note about Service = Node reachability in Sec 2 of the draft) that require continuous = monitoring of some special-purpose VTEPs.

In = my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more = efficiently. 

It would be good if you can provide an example = of what you think is more coverage than BFD. Or at least what extra = coverage do you exactly have in mind, since this draft is not capable of = more coverage than standard BFD over the IP tunnel. 

Regards,
Shahram
=

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text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Jul 2015 07:22:36.5589 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4 X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR0501MB1758 Archived-At: Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 02 Jul 2015 07:22:40 -0000 Shahram, Please see inline reply tagged [SPK]. > SD> Instead, why don't you run just 1 BFD session and list all VNI/VXLANs > inside the BFD as a list. Basically aggregate. Since you are not using > VNI/VXLAN for any forwarding. You are just using it for demultipexing. >=20 [SPK] Or with VNI 0 a special VNI so that it covers all VNI between those V= TEP? In case it is decided one BFD session which takes the same path in und= erlay as that of data packet between two VTEPs.=20 >=20 > When we are verifying VTEP to VTEP connectivity packet has to be absorbed > by VTEP itself and when it does it needs to demux BFD packet with some ke= y > and that would be VNI in the VXLAN header. This is what we are talking > about in the draft, maybe we are much more clear in the next version of = the > draft which will be published soon. >=20 > SD> RFC 5881 supports what you need. This RFC applies to any Tunnel: >=20 > " > This application of BFD can be used by any pair of systems > communicating via IPv4 and/or IPv6 across a single IP hop that is > associated with an incoming interface. This includes, but is not > limited to, physical media, virtual circuits, and tunnels" [SPK] Demux is one of the topic we are touching upon we are also discussing= other fields of complete VXLAN packet which is carrying BFD as payload. Fi= rst version of draft is not so clear all the fields, we have second version= of draft which is talking more about those. Will publish the second versio= n of draft in couple of days.=20 Thanks Santosh P K =20 >=20 >=20 >=20 > > > > -----Original Message----- > > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Shahram > > Davari > > Sent: Tuesday, June 30, 2015 9:23 AM > > To: Santosh P K; Gregory Mirsky; Vengada Prasad Govindan (venggovi) > > Cc: rtg-bfd@ietf.org > > Subject: RE: New Version Notification for > > draft-spallagatti-bfd-vxlan-00.txt > > > > Santosh, > > > > But your draft says: > > > > " BFD session can be used to run between VM's for VM's connectivity > check:" > > > > So, which one is it? VTEP-to-VTEP or VM- to-VM? > > > > Also what is the MAC-DA of inner Ethernet header? > > > > Thx > > Shahram > > > > -----Original Message----- > > From: Santosh P K [mailto:santoshpk@juniper.net] > > Sent: Tuesday, June 30, 2015 2:13 AM > > To: Shahram Davari; Gregory Mirsky; Vengada Prasad Govindan (venggovi) > > Cc: rtg-bfd@ietf.org > > Subject: RE: New Version Notification for > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > > Another question I have is how do you forward these BFD packets from > > > VTEP to VM? Since DIP =3D 127/8, I assume there is no way to forward > > > such packets past the VTEP. > > > > We don't want to send it past VTEP as BFD will terminate at VTEP > > itself. Right now use of 127/8 is not really clear as inner IP > > address. We have again added some text for inner IP address and its use= . > > > > > > > > > > If you want to do VM to VM connectivity check then I suggest one of > > > the > > > following: > > > > > > 1) if VMs are only L2 aware and VXLAN is L2VPN, the run Ethernet OAM > > > between VMs > > > 2) If VMs are L2 and L3 aware and VXLAN is L2VPN then run BFD over > > > IP/UDP over Ethernet over VXLAN > > > 3) If VMs are L3 aware and VXLAN is L3VPN then you have 2 cases: > > > 3a) If VTEP and VMs are physically in the same CPU core > > > then run what you are proposing in this draft (1-hop BFD). Although > > > it should give you same result as running BFD over the outer IP tunne= l > > > 3b) If VTEP and VMs are physically separate (such as VTEP > > > is in TOR and VM is CPU core), then run something similar to what > > > you are proposing but with Multi-hop DIP address so that BFD can be > > > forwarded to > > VM from VTEP. > > > > > > > We are not trying to address VM to VM connectivity check as I believe > > that does not really need any changes and BFD as it is should run. > > Proposal is from VTEP to VTEP. > > > > > > Thanks > > Santosh P K > > > > > -----Original Message----- > > > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Shahram > > > Davari > > > Sent: Monday, June 29, 2015 4:15 PM > > > To: Gregory Mirsky; Vengada Prasad Govindan (venggovi) > > > Cc: rtg-bfd@ietf.org > > > Subject: RE: New Version Notification for > > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > Hi Greg, > > > > > > I don't see much value in running BFD for SS-PW compared to running > > > BFD over the LSP. > > > > > > Thx > > > SD > > > > > > -----Original Message----- > > > From: Gregory Mirsky [mailto:gregory.mirsky@ericsson.com] > > > Sent: Monday, June 29, 2015 2:21 PM > > > To: Shahram Davari; Vengada Prasad Govindan (venggovi) > > > Cc: MALLIK MUDIGONDA (mmudigon); Santosh P K; rtg-bfd@ietf.org > > > Subject: RE: New Version Notification for > > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > Hi Shahram, > > > I'll get to VXLAN shorty but wanted to ask quick question about SS-PW= . > > > True, we have case of MS-PW where PW label used (that was discussed > > > in > > > MPLS- TP in particular). But that doesn't mean that VCCV BFD has > > > value only for MS- PW and for SS-PW has no value. Would you agree? > > > > > > Regards, > > > Greg > > > > > > -----Original Message----- > > > From: Shahram Davari [mailto:davari@broadcom.com] > > > Sent: Monday, June 29, 2015 2:02 PM > > > To: Gregory Mirsky; Vengada Prasad Govindan (venggovi) > > > Cc: MALLIK MUDIGONDA (mmudigon); Santosh P K; rtg-bfd@ietf.org > > > Subject: RE: New Version Notification for > > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > Hi Greg, > > > > > > You are welcome. Could you please clarify which one of the following > > > is the packet format: > > > > > > 1) OuterL2-Outer IP-UDP-VXLAN-Inner L2-Inner IP-UDP-BFD > > > > > > Or > > > > > > 2) OuterL2-Outer IP-UDP-VXLAN-Inner IP-UDP-BFD > > > > > > If (2) hen how do you specify the VXLAN payload in IP and not Etherne= t? > > > > > > Also This is different from PW BFD, since in case of PW, there can > > > be MS-PW, where the LSP BFD is not end-to-end. But in this case we > > > don't have MS- VXLAN. > > > So the span of the VXLAN and the IP tunnel is the same. > > > > > > In other words you have to specify in which part of forwarding the > > > BFD the VXLAN Tag is used. If it is not used then it has no effect. > > > > > > Thx > > > Shahram > > > > > > -----Original Message----- > > > From: Gregory Mirsky [mailto:gregory.mirsky@ericsson.com] > > > Sent: Monday, June 29, 2015 1:51 PM > > > To: Shahram Davari; Vengada Prasad Govindan (venggovi) > > > Cc: MALLIK MUDIGONDA (mmudigon); Santosh P K; rtg-bfd@ietf.org > > > Subject: RE: New Version Notification for > > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > Hi Shahram, > > > thank you for your comments to this proposal that make the > > > discussion so much alive. > > > I think that processing of the VXLAN tag by VTEP before validating > > > BFD is sufficient, in my view, level of verification. In VCCV BFD > > > the PW label is not used for BFD forwarding but we find it useful as > > > Service OAM in addition to RFC 5884, BFD over MPLS LSP. > > > > > > Regards, > > > Greg > > > > > > -----Original Message----- > > > From: Shahram Davari [mailto:davari@broadcom.com] > > > Sent: Monday, June 29, 2015 10:39 AM > > > To: Vengada Prasad Govindan (venggovi) > > > Cc: Gregory Mirsky; MALLIK MUDIGONDA (mmudigon); Santosh P K; rtg- > > > bfd@ietf.org > > > Subject: RE: New Version Notification for > > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > Hi Prasad, > > > > > > Is this a special type of BFD or standard BFD RFC 5880 and 5881)? > > > Since standard BFD processing does no care where the BFD came from > > > it only looks at "your discriminator" to update BFD state machine. > > > > > > Also I don't see how many VXLANs can be checked via a single BFD > session. > > > Could you please describe? > > > > > > Lastly checking to see a VXLAN/VNI forwarding domain exist in a VTEP > > > should not require BFD. Just use some query mechanism. Why do you > > need > > > to run continuous BFD. > > > > > > What you have to show me to convince me that your draft solves a > > > real problem is to show that VXLAN tag is used for BFD forwarding. > > > Otherwise BFD over the outer or Inner IP should give you all > > > coverage > > needed. > > > > > > > > > Thx > > > Shahram > > > > > > > > > > > > > > > -----Original Message----- > > > From: Vengada Prasad Govindan (venggovi) > [mailto:venggovi@cisco.com] > > > Sent: Monday, June 29, 2015 3:11 AM > > > To: Shahram Davari > > > Cc: Gregory Mirsky; MALLIK MUDIGONDA (mmudigon); Santosh P K; rtg- > > > bfd@ietf.org > > > Subject: RE: New Version Notification for > > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > Hello Shahram, > > > At the terminating VTEP, VxLAN information is used to consume the > > > BFD packet. In other words, a BFD session increases the confidence > > > of the existence of the VNI-Forwarding Domain mapping and the > > > presence of valid VTEP termination configuration at the terminating > > > VTEP. At the originating VTEP, it is a matter of implementation of > > > how many VxLAN tables are exercised in the datapath (am aware of at > > > least one implementation where it is being exercised to a considerabl= e > extent). > > > > > > Thanks > > > Prasad > > > > > > -----Original Message----- > > > From: Shahram Davari [mailto:davari@broadcom.com] > > > Sent: Saturday, June 27, 2015 8:24 PM > > > To: Shahram Davari > > > Cc: Vengada Prasad Govindan (venggovi); Gregory Mirsky; MALLIK > > > MUDIGONDA (mmudigon); Santosh P K; rtg-bfd@ietf.org > > > Subject: Re: New Version Notification for > > > draft-spallagatti-bfd-vxlan-00.txt > > > > > > Hi > > > > > > May be a better way to make this clear is to answer the following > question: > > > > > > Where is the VXLAN tag information used in this BFD forwarding? > > > > > > Thx > > > Shahram From nobody Thu Jul 2 05:46:23 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BEABD1A1A82 for ; Thu, 2 Jul 2015 05:46:21 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 4f9PcRQdtWPv for ; Thu, 2 Jul 2015 05:46:19 -0700 (PDT) Received: from rcdn-iport-8.cisco.com (rcdn-iport-8.cisco.com [173.37.86.79]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B45761A1A55 for ; Thu, 2 Jul 2015 05:46:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=28830; q=dns/txt; s=iport; t=1435841178; x=1437050778; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=9c3K2yUwWjFGYm65QXnVRjEXvgEMoZLmeEwC+aC0bw4=; b=csand+Q52XDyc+mw3q4CYTCE5GKIxOwRLsYOMR6x92vT6tMIfnXIERua 5iBFm0g+IEkiffkJXAiiA12ODrMH4kDe3tU/E0693yLKrp0tnnmN2FgUr SNzf0Zn6+nhgMVca1EWGMASkkHRGQodLfTwV23o3WzkUHedyDtX4L2Pzu E=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0CvAwAkMpVV/5BdJa1bgkVNVF8GvS0Jh2YCgUs4FAEBAQEBAQGBCoQiAQEBBEcwAhACAQgOAwMBAQEhAQYHIREUCQgCBA4FH4d7AxK7CItQDYVwAQEBAQEBAQEBAQEBAQEBAQEBAQEBF4tKgk2BTVsRBgGEKwEEkS+CYwGKAYFkgTqPdYM9g10mg3pvgUaBAgEBAQ X-IronPort-AV: E=Sophos;i="5.15,392,1432598400"; d="scan'208,217";a="6479964" Received: from rcdn-core-8.cisco.com ([173.37.93.144]) by rcdn-iport-8.cisco.com with ESMTP; 02 Jul 2015 12:46:07 +0000 Received: from xhc-rcd-x13.cisco.com (xhc-rcd-x13.cisco.com [173.37.183.87]) by rcdn-core-8.cisco.com (8.14.5/8.14.5) with ESMTP id t62Ck7go010829 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 2 Jul 2015 12:46:08 GMT Received: from xmb-rcd-x03.cisco.com ([169.254.7.52]) by xhc-rcd-x13.cisco.com ([173.37.183.87]) with mapi id 14.03.0195.001; Thu, 2 Jul 2015 07:46:07 -0500 From: "Reshad Rahman (rrahman)" To: Shahram Davari Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Topic: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Index: AQHQsEzmEknWHHNqr0WZplypYqzrJZ3AKHaggACBqID//7a8kIAD63tCgADRIgCAAQ8wgIABTpaAgAB2MwCAAEjkgA== Date: Thu, 2 Jul 2015 12:46:07 +0000 Message-ID: References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> In-Reply-To: <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.2.150604 x-originating-ip: [161.44.212.79] Content-Type: multipart/alternative; boundary="_000_D1BAAA31CEDDBrrahmanciscocom_" MIME-Version: 1.0 Archived-At: Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 02 Jul 2015 12:46:21 -0000 --_000_D1BAAA31CEDDBrrahmanciscocom_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi Shahram, Agreed. My point is that running BFD on the tunnel is not good enough for s= ome failures. Regards, Reshad. From: Rtg-bfd > o= n behalf of Shahram Davari > Date: Thursday, July 2, 2015 at 12:25 AM To: Reshad > Cc: Shahram Davari >, "rtg-bfd@ietf.org" > Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi Reshad, You don=92t need to run continuous BFD session per VNI to detect UDP port = configuration issue. To justify running BFD per VNI, one needs to show that= the forwarding of each of those BFD sessions depends on specific VNI value= . Thx Shahram On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) > wrote: Hi Shahram, I agree that running BFD between VTEPs per VNI might not scale well. But by= just running BFD on the IP tunnel IMO you won=92t detect certain problems,= maybe hypothetical, such as the UDP port being blocked (e.g. Due to a misc= onfigured ACL). Regards, Reshad. From: Rtg-bfd > o= n behalf of Shahram Davari = > Date: Tuesday, June 30, 2015 at 9:24 PM To: Santosh P K >, "S. = Davari" >, = "rtg-bfd@ietf.org" > Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Santosh, Is the BFD you are describing in your draft unicast or multicast? If unica= st then service nodes would not apply. Also if there is a service node then one can run BFD on the IP tunnel betwe= en source VTEP and service node and between service node and the destinatio= n VTEP. This is much more scalable than running end-to-end BFD between VTEP= s per VNI. You could even use such BFD to switch to a backup service node i= f there is failure to the main service node. Thx Shahram From: Santosh P K [mailto:santoshpk@juniper.net] Sent: Tuesday, June 30, 2015 2:14 AM To: S. Davari; Shahram Davari; rtg-bfd@ietf.org Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t There can be few VTEPs who might have capabilities to multicast the packet.= In such a scenario VTEP will send that packet to service node and service = node will do a multicast on its behalf. Thanks Santosh P K From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari Sent: Monday, June 29, 2015 10:48 AM To: Shahram Davari; rtg-bfd@ietf.org Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi What is a service node? Thx Sd Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram Regards, Shahram On Jun 27, 2015, at 7:06 AM, Shahram Davari > wrote: Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram --_000_D1BAAA31CEDDBrrahmanciscocom_ Content-Type: text/html; charset="Windows-1252" Content-ID: Content-Transfer-Encoding: quoted-printable
Hi Shahram,

Agreed. My point is that running BFD on the tunnel is not good enough = for some failures.

Regards,
Reshad. 


From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Sh= ahram Davari <realestate.= davari@gmail.com>
Date: Thursday, July 2, 2015 at 12:= 25 AM
To: Reshad <rrahman@cisco.com>
Cc: Shahram Davari <realestate.davari@gmail.com>, &qu= ot;rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: New Version Notificati= on for draft-spallagatti-bfd-vxlan-00.txt

Hi Reshad,

You don=92t need to run continuous  BFD session per VN= I to detect UDP port configuration issue. To justify running BFD per VNI, o= ne needs to show that the forwarding of each of those BFD sessions depends = on specific VNI value.   

Thx
Shahram

On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) <rrahman@cisco.com> wrot= e:

Hi Shahram,

I agree that running BFD between VTEPs per VNI might not sc= ale well. But by just running BFD on the IP tunnel IMO you won=92t detect c= ertain problems, maybe hypothetical, such as the UDP port being blocked (e.= g. Due to a misconfigured ACL).

Regards,
Reshad.

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Shahram Davari <davari@broadcom.com>
Date: Tuesday, June 30, 2015 at 9:24 PM
To: Santosh P K <santoshpk@juniper.net>, "S. Davari" <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: New Version Notification for draft= -spallagatti-bfd-vxlan-00.txt

Santosh,
 
Is the BFD you  are describing in your dra= ft unicast or multicast? If unicast then service nodes would not apply.
 
Also if there is a service node then one can ru= n BFD on the IP tunnel between source VTEP and service node and between ser= vice node and the destination VTEP. This is much more scalable than running end-to-end BFD between VTEPs per V= NI. You could even use such BFD to switch to a backup service node if there= is failure to the main service node.
 
Thx
Shahram
 
From:&nb= sp;Santosh P K [mailto:santoshpk@junip= er.net] 
Sent: T= uesday, June 30, 2015 2:14 AM
To: S. = Davari; Shahram Davari; <= a href=3D"mailto:rtg-bfd@ietf.org" style=3D"color: purple; text-decoration:= underline;" class=3D"">rtg-bfd@ietf.org
Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt
 
There can be few VTEPs who might have capabilit= ies to multicast the packet. In such a scenario VTEP will send that packet = to service node and service node will do a multicast on its behalf. <= /span>
 
 
Thanks
Santosh P K
 
From:&= nbsp;Rtg-bfd [mailto:rtg-bfd-bounce= s@ietf.org] On Behalf Of S. Davari<= br class=3D""> Sent: M= onday, June 29, 2015 10:48 AM
To: Sha= hram Davari; rtg-bfd@ietf.org
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt
 
Hi
 
What is a service node?
 
Thx
 
Sd
 
 
Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . 

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. 

Regards,
Shahram
Regards,
Shahram
 


On Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.com> wrote:

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . 

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. 

Regards,
Shahram

 --_000_D1BAAA31CEDDBrrahmanciscocom_-- From nobody Thu Jul 2 11:58:30 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EB1261A8923 for ; Thu, 2 Jul 2015 11:58:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.209 X-Spam-Level: X-Spam-Status: No, score=-4.209 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, T_RP_MATCHES_RCVD=-0.01] autolearn=ham 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 Ar1i7v--M_9D for ; Thu, 2 Jul 2015 11:58:24 -0700 (PDT) Received: from mail-gw1-out.broadcom.com (mail-gw1-out.broadcom.com [216.31.210.62]) by ietfa.amsl.com (Postfix) with ESMTP id 9DF121A891C for ; Thu, 2 Jul 2015 11:58:23 -0700 (PDT) X-IronPort-AV: E=Sophos; i="5.15,394,1432623600"; d="scan'208,217"; a="69083171" Received: from irvexchcas06.broadcom.com (HELO IRVEXCHCAS06.corp.ad.broadcom.com) ([10.9.208.53]) by mail-gw1-out.broadcom.com with ESMTP; 02 Jul 2015 12:58:56 -0700 Received: from SJEXCHCAS04.corp.ad.broadcom.com (10.16.203.10) by IRVEXCHCAS06.corp.ad.broadcom.com (10.9.208.53) with Microsoft SMTP Server (TLS) id 14.3.235.1; Thu, 2 Jul 2015 11:58:20 -0700 Received: from SJEXCHMB12.corp.ad.broadcom.com ([fe80::bc15:c1e1:c29a:36f7]) by SJEXCHCAS04.corp.ad.broadcom.com ([::1]) with mapi id 14.03.0235.001; Thu, 2 Jul 2015 11:58:20 -0700 From: Shahram Davari To: "Reshad Rahman (rrahman)" , Shahram Davari Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Topic: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Index: AQHQsEzmEknWHHNqr0WZplypYqzrJZ3AKHaggACjL4CAAAv0AP//jKHagAMGkYCAAdQzAIAAmPTAgAIH4QCAADMkAIAAi+iA///yiqA= Date: Thu, 2 Jul 2015 18:58:19 +0000 Message-ID: <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.16.203.100] Content-Type: multipart/alternative; boundary="_000_4A6CE49E6084B141B15C0713B8993F2831F4FEE1SJEXCHMB12corpa_" MIME-Version: 1.0 Archived-At: Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 02 Jul 2015 18:58:29 -0000 --_000_4A6CE49E6084B141B15C0713B8993F2831F4FEE1SJEXCHMB12corpa_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Agree. But we can may be come up with a more efficient solution. Thx SD From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Reshad Rahman = (rrahman) Sent: Thursday, July 02, 2015 5:46 AM To: Shahram Davari Cc: rtg-bfd@ietf.org Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi Shahram, Agreed. My point is that running BFD on the tunnel is not good enough for s= ome failures. Regards, Reshad. From: Rtg-bfd > o= n behalf of Shahram Davari > Date: Thursday, July 2, 2015 at 12:25 AM To: Reshad > Cc: Shahram Davari >, "rtg-bfd@ietf.org" > Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi Reshad, You don't need to run continuous BFD session per VNI to detect UDP port co= nfiguration issue. To justify running BFD per VNI, one needs to show that t= he forwarding of each of those BFD sessions depends on specific VNI value. Thx Shahram On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) > wrote: Hi Shahram, I agree that running BFD between VTEPs per VNI might not scale well. But by= just running BFD on the IP tunnel IMO you won't detect certain problems, m= aybe hypothetical, such as the UDP port being blocked (e.g. Due to a miscon= figured ACL). Regards, Reshad. From: Rtg-bfd > o= n behalf of Shahram Davari = > Date: Tuesday, June 30, 2015 at 9:24 PM To: Santosh P K >, "S. = Davari" >, = "rtg-bfd@ietf.org" > Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Santosh, Is the BFD you are describing in your draft unicast or multicast? If unica= st then service nodes would not apply. Also if there is a service node then one can run BFD on the IP tunnel betwe= en source VTEP and service node and between service node and the destinatio= n VTEP. This is much more scalable than running end-to-end BFD between VTEP= s per VNI. You could even use such BFD to switch to a backup service node i= f there is failure to the main service node. Thx Shahram From: Santosh P K [mailto:santoshpk@juniper.net] Sent: Tuesday, June 30, 2015 2:14 AM To: S. Davari; Shahram Davari; rtg-bfd@ietf.org Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t There can be few VTEPs who might have capabilities to multicast the packet.= In such a scenario VTEP will send that packet to service node and service = node will do a multicast on its behalf. Thanks Santosh P K From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari Sent: Monday, June 29, 2015 10:48 AM To: Shahram Davari; rtg-bfd@ietf.org Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi What is a service node? Thx Sd Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram Regards, Shahram On Jun 27, 2015, at 7:06 AM, Shahram Davari > wrote: Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram --_000_4A6CE49E6084B141B15C0713B8993F2831F4FEE1SJEXCHMB12corpa_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Agree. But we can may be = come up with a more efficient solution.

 <= /p>

Thx
SD

 <= /p>

From: Rtg-bfd = [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Reshad Rahman (rrahman)
Sent: Thursday, July 02, 2015 5:46 AM
To: Shahram Davari
Cc: rtg-bfd@ietf.org
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

 

Hi Shahram,

 

Agreed. My point is that ru= nning BFD on the tunnel is not good enough for some failures.

 

Regards,<= /p>

Reshad. 

 

 

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Shahram Dava= ri <realestate.davari@gma= il.com>
Date: Thursday, July 2, 2015 at 12:25 AM
To: Reshad <rrahman@cisco.co= m>
Cc: Shahram Davari <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rt= g-bfd@ietf.org>
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

 

Hi Reshad,

 

You don’t need to run= continuous  BFD session per VNI to detect UDP port configuration issu= e. To justify running BFD per VNI, one needs to show that the forwarding of each of those BFD sessions depends on specific VNI value.   <= o:p>

 

Thx

Shahram

 

On Jul 1, 2015, at 6:22 PM,= Reshad Rahman (rrahman) <rrahman@c= isco.com> wrote:

 

Hi Shahram,

 

I agree that running BFD be= tween VTEPs per VNI might not scale well. But by just running BFD on the IP= tunnel IMO you won’t detect certain problems, maybe hypothetical, such as the UDP port being blocked (e.g. Due to a misconfigured ACL).=

 

Regards,<= /p>

Reshad.

 

From: Rtg-bfd= <rtg-bfd-bounces@ietf.org> on behalf of Shahram Davari <davari@broadcom.com>
Date: Tuesday, Jun= e 30, 2015 at 9:24 PM
To: Santosh P K &l= t;san= toshpk@juniper.net>, "S. Davari" <realestate.da= vari@gmail.com>, "rtg= -bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: New V= ersion Notification for draft-spallagatti-bfd-vxlan-00.txt

 

Santosh,

 

Is the BFD you  are = describing in your draft unicast or multicast? If unicast then service node= s would not apply.

 

Also if there is a servic= e node then one can run BFD on the IP tunnel between source VTEP and servic= e node and between service node and the destination VTEP. This is much more scalable than running end-to-end BFD between VTEPs per V= NI. You could even use such BFD to switch to a backup service node if there= is failure to the main service node.

 

Thx

Shahram

 

From: Santosh P K [mailto:santoshpk@juniper.net] 
Sent: Tuesday, Jun= e 30, 2015 2:14 AM
To: S. Davari; Sha= hram Davari; rtg-bfd@ietf.org
Subject: RE: New V= ersion Notification for draft-spallagatti-bfd-vxlan-00.txt

 =

There can be few VTEPs wh= o might have capabilities to multicast the packet. In such a scenario VTEP = will send that packet to service node and service node will do a multicast on its behalf. <= /span>

 

 

Thanks

Santosh P K

 

From: = Rtg-bfd [= mailto:rtg-bfd-bounces@ietf.org] On Behalf Of&nb= sp;S. Davari
Sent: Monday, June= 29, 2015 10:48 AM
To: Shahram Davari= ; rtg-bfd@ietf.org
Subject: Re: New V= ersion Notification for draft-spallagatti-bfd-vxlan-00.txt

 =

Hi

 =

What is a service node?<= o:p>

 =

Thx

 =

Sd

 =

 =

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . 

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. 

Regards,
Shahram

Regards,

Shahram

 =


On Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.com>= wrote:

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . 

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. 

Regards,
Shahram

 

--_000_4A6CE49E6084B141B15C0713B8993F2831F4FEE1SJEXCHMB12corpa_-- From nobody Thu Jul 2 13:39:20 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B59041AC39A for ; Thu, 2 Jul 2015 13:39:19 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.209 X-Spam-Level: X-Spam-Status: No, score=-4.209 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, T_RP_MATCHES_RCVD=-0.01] autolearn=ham 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 9DP57ZrlsDn1 for ; Thu, 2 Jul 2015 13:39:14 -0700 (PDT) Received: from mail-gw1-out.broadcom.com (mail-gw1-out.broadcom.com [216.31.210.62]) by ietfa.amsl.com (Postfix) with ESMTP id ACDAA1ABD3D for ; Thu, 2 Jul 2015 13:39:14 -0700 (PDT) X-IronPort-AV: E=Sophos; i="5.15,394,1432623600"; d="scan'208,217"; a="69091651" Received: from irvexchcas06.broadcom.com (HELO IRVEXCHCAS06.corp.ad.broadcom.com) ([10.9.208.53]) by mail-gw1-out.broadcom.com with ESMTP; 02 Jul 2015 14:39:49 -0700 Received: from SJEXCHCAS07.corp.ad.broadcom.com (10.16.203.16) by IRVEXCHCAS06.corp.ad.broadcom.com (10.9.208.53) with Microsoft SMTP Server (TLS) id 14.3.235.1; Thu, 2 Jul 2015 13:39:12 -0700 Received: from SJEXCHMB12.corp.ad.broadcom.com ([fe80::bc15:c1e1:c29a:36f7]) by SJEXCHCAS07.corp.ad.broadcom.com ([::1]) with mapi id 14.03.0235.001; Thu, 2 Jul 2015 13:39:11 -0700 From: Shahram Davari To: Shahram Davari , "Reshad Rahman (rrahman)" , Shahram Davari Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Topic: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Index: AQHQsEzmEknWHHNqr0WZplypYqzrJZ3AKHaggACjL4CAAAv0AP//jKHagAMGkYCAAdQzAIAAmPTAgAIH4QCAADMkAIAAi+iA///yiqCAABxGMA== Date: Thu, 2 Jul 2015 20:39:11 +0000 Message-ID: <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> In-Reply-To: <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.16.203.100] Content-Type: multipart/alternative; boundary="_000_4A6CE49E6084B141B15C0713B8993F2831F501BASJEXCHMB12corpa_" MIME-Version: 1.0 Archived-At: Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 02 Jul 2015 20:39:19 -0000 --_000_4A6CE49E6084B141B15C0713B8993F2831F501BASJEXCHMB12corpa_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Sure. From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Shahram Davari Sent: Thursday, July 02, 2015 11:58 AM To: Reshad Rahman (rrahman); Shahram Davari Cc: rtg-bfd@ietf.org Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Agree. But we can may be come up with a more efficient solution. Thx SD From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Reshad Rahman = (rrahman) Sent: Thursday, July 02, 2015 5:46 AM To: Shahram Davari Cc: rtg-bfd@ietf.org Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi Shahram, Agreed. My point is that running BFD on the tunnel is not good enough for s= ome failures. Regards, Reshad. From: Rtg-bfd > o= n behalf of Shahram Davari > Date: Thursday, July 2, 2015 at 12:25 AM To: Reshad > Cc: Shahram Davari >, "rtg-bfd@ietf.org" > Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi Reshad, You don't need to run continuous BFD session per VNI to detect UDP port co= nfiguration issue. To justify running BFD per VNI, one needs to show that t= he forwarding of each of those BFD sessions depends on specific VNI value. Thx Shahram On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) > wrote: Hi Shahram, I agree that running BFD between VTEPs per VNI might not scale well. But by= just running BFD on the IP tunnel IMO you won't detect certain problems, m= aybe hypothetical, such as the UDP port being blocked (e.g. Due to a miscon= figured ACL). Regards, Reshad. From: Rtg-bfd > o= n behalf of Shahram Davari = > Date: Tuesday, June 30, 2015 at 9:24 PM To: Santosh P K >, "S. = Davari" >, = "rtg-bfd@ietf.org" > Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Santosh, Is the BFD you are describing in your draft unicast or multicast? If unica= st then service nodes would not apply. Also if there is a service node then one can run BFD on the IP tunnel betwe= en source VTEP and service node and between service node and the destinatio= n VTEP. This is much more scalable than running end-to-end BFD between VTEP= s per VNI. You could even use such BFD to switch to a backup service node i= f there is failure to the main service node. Thx Shahram From: Santosh P K [mailto:santoshpk@juniper.net] Sent: Tuesday, June 30, 2015 2:14 AM To: S. Davari; Shahram Davari; rtg-bfd@ietf.org Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t There can be few VTEPs who might have capabilities to multicast the packet.= In such a scenario VTEP will send that packet to service node and service = node will do a multicast on its behalf. Thanks Santosh P K From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari Sent: Monday, June 29, 2015 10:48 AM To: Shahram Davari; rtg-bfd@ietf.org Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.tx= t Hi What is a service node? Thx Sd Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram Regards, Shahram On Jun 27, 2015, at 7:06 AM, Shahram Davari > wrote: Hi Prasad , I don't see how you get more coverage having a VXLAN tag. Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. GVP1> One of the aspects of the next version of the draft will have a valid= inner DIP instead of 127/8. This should help address your concern to an ex= tent. Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well, = not using it as an excuse but I am just noting the precedent here. In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD. GVP1> There are specific use-cases (see note about Service Node reachabilit= y in Sec 2 of the draft) that require continuous monitoring of some special= -purpose VTEPs. In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. Regards, Shahram --_000_4A6CE49E6084B141B15C0713B8993F2831F501BASJEXCHMB12corpa_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Sure.

 <= /p>

From: Rtg-bfd = [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Shahram Davari
Sent: Thursday, July 02, 2015 11:58 AM
To: Reshad Rahman (rrahman); Shahram Davari
Cc: rtg-bfd@ietf.org
Subject: RE: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

 

Agree. But we can may be = come up with a more efficient solution.

 <= /p>

Thx
SD

 <= /p>

From: Rtg-bfd = [mailto:rtg-bfd-bounces@ietf.or= g] On Behalf Of Reshad Rahman (rrahman)
Sent: Thursday, July 02, 2015 5:46 AM
To: Shahram Davari
Cc: rtg-bfd@ietf.org
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

 

Hi Shahram,

 

Agreed. My point is that ru= nning BFD on the tunnel is not good enough for some failures.

 

Regards,<= /p>

Reshad. 

 

 

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Shahram Dava= ri <realestate.davari@gma= il.com>
Date: Thursday, July 2, 2015 at 12:25 AM
To: Reshad <rrahman@cisco.co= m>
Cc: Shahram Davari <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rt= g-bfd@ietf.org>
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

 

Hi Reshad,

 

You don’t need to run= continuous  BFD session per VNI to detect UDP port configuration issu= e. To justify running BFD per VNI, one needs to show that the forwarding of each of those BFD sessions depends on specific VNI value.   <= o:p>

 

Thx

Shahram

 

On Jul 1, 2015, at 6:22 PM,= Reshad Rahman (rrahman) <rrahman@c= isco.com> wrote:

 

Hi Shahram,

 

I agree that running BFD be= tween VTEPs per VNI might not scale well. But by just running BFD on the IP= tunnel IMO you won’t detect certain problems, maybe hypothetical, such as the UDP port being blocked (e.g. Due to a misconfigured ACL).=

 

Regards,<= /p>

Reshad.

 

From: Rtg-bfd= <rtg-bfd-bounces@ietf.org> on behalf of Shahram Davari <davari@broadcom.com>
Date: Tuesday, Jun= e 30, 2015 at 9:24 PM
To: Santosh P K &l= t;san= toshpk@juniper.net>, "S. Davari" <realestate.da= vari@gmail.com>, "rtg= -bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: New V= ersion Notification for draft-spallagatti-bfd-vxlan-00.txt

 

Santosh,

 

Is the BFD you  are = describing in your draft unicast or multicast? If unicast then service node= s would not apply.

 

Also if there is a servic= e node then one can run BFD on the IP tunnel between source VTEP and servic= e node and between service node and the destination VTEP. This is much more scalable than running end-to-end BFD between VTEPs per V= NI. You could even use such BFD to switch to a backup service node if there= is failure to the main service node.

 

Thx

Shahram

 

From: Santosh P K [mailto:santoshpk@juniper.net] 
Sent: Tuesday, Jun= e 30, 2015 2:14 AM
To: S. Davari; Sha= hram Davari; rtg-bfd@ietf.org
Subject: RE: New V= ersion Notification for draft-spallagatti-bfd-vxlan-00.txt

 =

There can be few VTEPs wh= o might have capabilities to multicast the packet. In such a scenario VTEP = will send that packet to service node and service node will do a multicast on its behalf. <= /span>

 

 

Thanks

Santosh P K

 

From: = Rtg-bfd [= mailto:rtg-bfd-bounces@ietf.org] On Behalf Of&nb= sp;S. Davari
Sent: Monday, June= 29, 2015 10:48 AM
To: Shahram Davari= ; rtg-bfd@ietf.org
Subject: Re: New V= ersion Notification for draft-spallagatti-bfd-vxlan-00.txt

 =

Hi

 =

What is a service node?<= o:p>

 =

Thx

 =

Sd

 =

 =

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . 

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. 

Regards,
Shahram

Regards,

Shahram

 =


On Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.com>= wrote:

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= . 

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel. 

Regards,
Shahram

 

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Mon, 6 Jul 2015 11:20:30 -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] autolearn=ham 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 3wvr9rpd67Wu; Mon, 6 Jul 2015 11:20:29 -0700 (PDT) Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 891751ACD78; Mon, 6 Jul 2015 11:20:28 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Subject: I-D Action: draft-zheng-bfd-yang-04.txt X-Test-IDTracker: no X-IETF-IDTracker: 6.0.4.p1 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20150706182028.29799.26799.idtracker@ietfa.amsl.com> Date: Mon, 06 Jul 2015 11:20:28 -0700 Archived-At: Cc: rtg-bfd@ietf.org X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Jul 2015 18:20:30 -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 Working Group of the IETF. Title : Yang Data Model for Bidirectional Forwarding Detection (BFD) Authors : Lianshu Zheng Reshad Rahman Santosh Pallagatti Mahesh Jethanandani Greg Mirsky Filename : draft-zheng-bfd-yang-04.txt Pages : 37 Date : 2015-07-06 Abstract: This document defines a YANG data model that can be used to configure and manage Bidirectional Forwarding Detection (BFD). The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-zheng-bfd-yang/ There's also a htmlized version available at: https://tools.ietf.org/html/draft-zheng-bfd-yang-04 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-zheng-bfd-yang-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 Thu Jul 9 14:39:06 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 165E61B2D04 for ; Tue, 7 Jul 2015 18:51:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -106.912 X-Spam-Level: X-Spam-Status: No, score=-106.912 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham 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 Lf1Ki6hVgppE for ; Tue, 7 Jul 2015 18:51:15 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) by ietfa.amsl.com (Postfix) with ESMTP id B1B041B2CE9 for ; Tue, 7 Jul 2015 18:51:15 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id D62A8180206; Tue, 7 Jul 2015 18:47:43 -0700 (PDT) To: dkatz@juniper.net, dward@juniper.net, akatlas@gmail.com, db3546@att.com, aretana@cisco.com, nobo.akiya.dev@gmail.com, jhaas@pfrc.org Subject: [Editorial Errata Reported] RFC5880 (4410) X-PHP-Originating-Script: 6000:errata_mail_lib.php From: RFC Errata System Message-Id: <20150708014743.D62A8180206@rfc-editor.org> Date: Tue, 7 Jul 2015 18:47:43 -0700 (PDT) Archived-At: X-Mailman-Approved-At: Thu, 09 Jul 2015 14:39:04 -0700 Cc: bestman0729@sina.com, rtg-bfd@ietf.org, rfc-editor@rfc-editor.org X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 08 Jul 2015 01:51:17 -0000 The following errata report has been submitted for RFC5880, "Bidirectional Forwarding Detection (BFD)". -------------------------------------- You may review the report below and at: http://www.rfc-editor.org/errata_search.php?rfc=5880&eid=4410 -------------------------------------- Type: Editorial Reported by: Liu Lin Section: 6.8.4 Original Text ------------- If Demand mode is active, and a period of time equal to the Detection Time passes after the initiation of a Poll Sequence (the transmission of the first BFD Control packet with the Poll bit set), the session has gone down Corrected Text -------------- If Demand mode is active, and a period of time equal to the Detection Time passes after the initiation of a Poll Sequence (the transmission of the first BFD Control packet with the Poll bit set),and without receiving a BFD Control packet with the Final (F) bit set from the remote system, the session has gone down Notes ----- If has received BFD Control packet with the Final (F) bit set from the remote system, the session will not gone down Instructions: ------------- This erratum is currently posted as "Reported". If necessary, please use "Reply All" to discuss whether it should be verified or rejected. When a decision is reached, the verifying party (IESG) can log in to change the status and edit the report, if necessary. -------------------------------------- RFC5880 (draft-ietf-bfd-base-11) -------------------------------------- Title : Bidirectional Forwarding Detection (BFD) Publication Date : June 2010 Author(s) : D. Katz, D. Ward Category : PROPOSED STANDARD Source : Bidirectional Forwarding Detection Area : Routing Stream : IETF Verifying Party : IESG From nobody Thu Jul 9 18:51:34 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A82301A3B9D for ; Thu, 9 Jul 2015 18:51:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 mjv_DwpmFEyP for ; Thu, 9 Jul 2015 18:51:31 -0700 (PDT) Received: from alln-iport-4.cisco.com (alln-iport-4.cisco.com [173.37.142.91]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1ED7A1A21BE for ; Thu, 9 Jul 2015 18:51:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=4839; q=dns/txt; s=iport; t=1436493092; x=1437702692; h=from:to:subject:date:message-id:mime-version; bh=pl1NKKADvVVzPOEHvchcVQ5TmlIJ0ZnGqjfGOpunJ/M=; b=VqvO3/yDL8yaigl/fNjBAxIreqRM2hRGXLzsvF3dUq1HNWG6tywSD+64 GWG6ybS014F8fwlVxNCx5FcjxGnU67Z0LDR/zKfU89iTVXVc+mmQPATqY AVGgitAcYepQjqKboDxGFka3mtAQbH302SuIUgYRFGrVZZQlkz17POyPv k=; X-Files: signature.asc : 841 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0CDAwBmJJ9V/4gNJK1bgxJUZoMauAkJgXGFd4FYOBQBAQEBAQEBgQqEKiMGYgECCgo0AjQnBAEgiCANuGiWOQEBAQEBAQEDAQEBAQEBAQEWBJBNgnMvgRQFlC0BgiyBVGaHGZhnJmODGII2gQQBAQE X-IronPort-AV: E=Sophos;i="5.15,443,1432598400"; d="asc'?scan'208,217";a="167273974" Received: from alln-core-3.cisco.com ([173.36.13.136]) by alln-iport-4.cisco.com with ESMTP; 10 Jul 2015 01:51:31 +0000 Received: from xhc-rcd-x07.cisco.com (xhc-rcd-x07.cisco.com [173.37.183.81]) by alln-core-3.cisco.com (8.14.5/8.14.5) with ESMTP id t6A1pUjL004222 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 10 Jul 2015 01:51:30 GMT Received: from xmb-aln-x02.cisco.com ([169.254.5.220]) by xhc-rcd-x07.cisco.com ([173.37.183.81]) with mapi id 14.03.0195.001; Thu, 9 Jul 2015 20:51:30 -0500 From: "Carlos Pignataro (cpignata)" To: Jeff Haas , "rtg-bfd@ietf.org" , "bfd-chairs@tools.ietf.org" Subject: S-BFD Documents Progress? Thread-Topic: S-BFD Documents Progress? Thread-Index: AQHQurLwKQllfJ3Oo0quAQs5yeEtww== Importance: high X-Priority: 1 Date: Fri, 10 Jul 2015 01:51:28 +0000 Message-ID: <4597F9B4-6D67-44E7-95CC-5DAB9A2E839E@cisco.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.82.252.37] Content-Type: multipart/signed; boundary="Apple-Mail=_EF15270E-EEDA-426E-A8FB-24F9E40CEE2C"; protocol="application/pgp-signature"; micalg=pgp-sha256 MIME-Version: 1.0 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 10 Jul 2015 01:51:32 -0000 --Apple-Mail=_EF15270E-EEDA-426E-A8FB-24F9E40CEE2C Content-Type: multipart/alternative; boundary="Apple-Mail=_C7872FEA-2610-41D5-9DFE-6A79067E575B" --Apple-Mail=_C7872FEA-2610-41D5-9DFE-6A79067E575B Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Jeff, The first set of S-BFD documents finished WG LC about 2 months ago. However, they are still in =E2=80=9CWG Doc=E2=80=9D or =E2=80=9CIn = WGLC=E2=80=9D state, with no shepherd assigned and no write-up [1] [2] = [3]; their related Milestones are months past due. What is the target timeline for submitting these to the IESG? Thanks, =E2=80=94 Carlos. [1] https://datatracker.ietf.org/doc/draft-ietf-bfd-seamless-use-case/ = = =E2=80=9CWG Document Dec 2014" [2] https://datatracker.ietf.org/doc/draft-ietf-bfd-seamless-base/ = =E2=80=9C= In WG Last Call Mar 2015=E2=80=9D [3] https://datatracker.ietf.org/doc/draft-ietf-bfd-seamless-ip/ = =E2=80=9CIn= WG Last Call Mar 2015" --Apple-Mail=_C7872FEA-2610-41D5-9DFE-6A79067E575B Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Jeff,

The = first set of S-BFD documents finished WG LC about 2 months = ago.

However, = they are still in =E2=80=9CWG Doc=E2=80=9D or =E2=80=9CIn WGLC=E2=80=9D = state, with no shepherd assigned and no write-up [1] [2] [3]; their = related Milestones are months past due.

What is the target timeline for = submitting these to the IESG?

Thanks,

=E2=80=94 Carlos.

[1] https://datatracker.ietf.org/doc/draft-ietf-bfd-seamless-use-ca= se/ =E2=80=9CWG Document =20 Dec 2014"
[2] https://datatracker.ietf.org/doc/draft-ietf-bfd-seamless-base/<= /a> =E2=80=9CIn WG Last Call =20 Mar 2015=E2=80=9D
<= div class=3D"">[3] https://datatracker.ietf.org/doc/draft-ietf-bfd-seamless-ip/ =E2=80=9CIn WG Last Call =20 Mar = 2015"= --Apple-Mail=_C7872FEA-2610-41D5-9DFE-6A79067E575B-- --Apple-Mail=_EF15270E-EEDA-426E-A8FB-24F9E40CEE2C Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJVnyUiAAoJEIXgpQGOZny9iZcP/0r93FThGgdyrDJ70Jf5Ri1p EwELLQ/FkAxmEs1KGKbZaviufjQKapXfZFAOzuhVidGPSWdsCelT3eGzmn7h2UWi dH3hNKuPrymrouEOdWJ6/EgG080VymFVKRZwtD2R5YfIc6P2VmIp0F85VVifxf+m Gu0B9ivRAaTRpq5oZIaxTGQFyQevQs0twITNgGW/hoVNVr0l6jFHhI+MXJxDRbdo VgZpMGFQvhYIjmulAcQl0Bi3pConyyo1exqryqLy/I6CIAZitOIf6bbB9RxLBTiE 1kWnHfFEs82JCKV7q/KcROmBp+GfydXzs5xklQfBAZc5Nzyc7GDtG67TaeaaLub4 Kog0Zn053cJ91NiOZwDxC9t2BSFSEfhxAd8fEtIhW1HrgU3WayfFyPTKz/cP0j32 wXOCzAV7KKXwXrExYnGlRs4iZ+SHej+iluYCMIwLF2eERPr5pLGpTI+lgz+ZEtMG ydN1v4FBhfJSZfiBI3QoWp+gvDybW4aG1TrfEJcTmgO4HFqscpqJvPgFJ1of6lEP Pe1n/yDp36NE1caniR9gfOIFnJUnc4Uy9/G57XwM8mhxccDtdRunhTM+Oa4SZ78P IVKXqAXPUf2nUYkppNPtxcyxq3buongY1OWxHtTF5nJg6lcuyKqhyafum2yC40ul 2IqhEWnhyJjitkK1v+jF =lalO -----END PGP SIGNATURE----- --Apple-Mail=_EF15270E-EEDA-426E-A8FB-24F9E40CEE2C-- From nobody Fri Jul 10 00:12:31 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 795591A891A for ; Fri, 10 Jul 2015 00:12:30 -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, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=ham 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 b_z9yQsSStSY for ; Fri, 10 Jul 2015 00:12:27 -0700 (PDT) Received: from mail-lb0-x22e.google.com (mail-lb0-x22e.google.com [IPv6:2a00:1450:4010:c04::22e]) (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 9B8F21A8915 for ; Fri, 10 Jul 2015 00:12:26 -0700 (PDT) Received: by lbnk3 with SMTP id k3so87527169lbn.1 for ; Fri, 10 Jul 2015 00:12:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=JFhrKQkrBGyI03TZv8Cn8uQ/tXwrmnluKx45ywJJwlo=; b=LAfOfRBIqYQ/3J3/2WY/PzmZC13spIkQ8BN127plZ99ulHSQXSrliLaj/HIwbFEMWQ wFZ+ove6gx06SOTNcrutMGfrM4LhF27yk8M1+g23puajUqCcD82fWJkhj79kgqLJocKm Oz23UzAhP1CD7Df+rb8PxFTrGO/yvNnqfTNqokeT5WyzZFoVOT1AuAy//h9jpU18u7hC Zm+Tdka/pfIIMHCs+PvRpnYARlLNOjk6o5cDlma8dm7Lgdv7kGmTe67WGhIsIaGqxWHy pw4HaFNNg/K43AO7t5EetR9Zgw873bXu7ToacMrQymQfEJLD2ICU+o+58xvTc2Osyc3z u1LQ== MIME-Version: 1.0 X-Received: by 10.152.203.233 with SMTP id kt9mr16468876lac.99.1436512345045; Fri, 10 Jul 2015 00:12:25 -0700 (PDT) Received: by 10.112.67.42 with HTTP; Fri, 10 Jul 2015 00:12:24 -0700 (PDT) In-Reply-To: <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> Date: Fri, 10 Jul 2015 16:12:24 +0900 Message-ID: Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt From: Nobo Akiya To: Shahram Davari Content-Type: multipart/alternative; boundary=001a113459840abf6d051a8018dc Archived-At: Cc: "Reshad Rahman \(rrahman\)" , "rtg-bfd@ietf.org" , Shahram Davari X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 10 Jul 2015 07:12:30 -0000 --001a113459840abf6d051a8018dc Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Long and interesting thread :) How about setting the MAC-DA as the MAC of the sender VTEP? Thanks! -Nobo On Fri, Jul 3, 2015 at 5:39 AM, Shahram Davari wrote: > Sure. > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] *On Behalf Of *Shahram > Davari > *Sent:* Thursday, July 02, 2015 11:58 AM > *To:* Reshad Rahman (rrahman); Shahram Davari > *Cc:* rtg-bfd@ietf.org > *Subject:* RE: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Agree. But we can may be come up with a more efficient solution. > > > > Thx > SD > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *Reshad Rahman (rrahman) > *Sent:* Thursday, July 02, 2015 5:46 AM > *To:* Shahram Davari > *Cc:* rtg-bfd@ietf.org > *Subject:* Re: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Hi Shahram, > > > > Agreed. My point is that running BFD on the tunnel is not good enough for > some failures. > > > > Regards, > > Reshad. > > > > > > *From: *Rtg-bfd on behalf of Shahram Davari < > realestate.davari@gmail.com> > *Date: *Thursday, July 2, 2015 at 12:25 AM > *To: *Reshad > *Cc: *Shahram Davari , "rtg-bfd@ietf.org" < > rtg-bfd@ietf.org> > *Subject: *Re: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Hi Reshad, > > > > You don=E2=80=99t need to run continuous BFD session per VNI to detect U= DP port > configuration issue. To justify running BFD per VNI, one needs to show th= at > the forwarding of each of those BFD sessions depends on specific VNI valu= e. > > > > > Thx > > Shahram > > > > On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) > wrote: > > > > Hi Shahram, > > > > I agree that running BFD between VTEPs per VNI might not scale well. But > by just running BFD on the IP tunnel IMO you won=E2=80=99t detect certain= problems, > maybe hypothetical, such as the UDP port being blocked (e.g. Due to a > misconfigured ACL). > > > > Regards, > > Reshad. > > > > *From: *Rtg-bfd on behalf of Shahram Davari < > davari@broadcom.com> > *Date: *Tuesday, June 30, 2015 at 9:24 PM > *To: *Santosh P K , "S. Davari" < > realestate.davari@gmail.com>, "rtg-bfd@ietf.org" > *Subject: *RE: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Santosh, > > > > Is the BFD you are describing in your draft unicast or multicast? If > unicast then service nodes would not apply. > > > > Also if there is a service node then one can run BFD on the IP tunnel > between source VTEP and service node and between service node and the > destination VTEP. This is much more scalable than running end-to-end BFD > between VTEPs per VNI. You could even use such BFD to switch to a backup > service node if there is failure to the main service node. > > > > Thx > > Shahram > > > > *From:* Santosh P K [mailto:santoshpk@juniper.net = ] > > *Sent:* Tuesday, June 30, 2015 2:14 AM > *To:* S. Davari; Shahram Davari; rtg-bfd@ietf.org > *Subject:* RE: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > There can be few VTEPs who might have capabilities to multicast the > packet. In such a scenario VTEP will send that packet to service node and > service node will do a multicast on its behalf. > > > > > > Thanks > > Santosh P K > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *S. Davari > *Sent:* Monday, June 29, 2015 10:48 AM > *To:* Shahram Davari; rtg-bfd@ietf.org > *Subject:* Re: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Hi > > > > What is a service node? > > > > Thx > > > > Sd > > > > > > Hi Prasad , > > I don't see how you get more coverage having a VXLAN tag. > > Since you are not testing the VXLAN based VFI/VRF forwarding. By that I > mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. > GVP1> One of the aspects of the next version of the draft will have a > valid inner DIP instead of 127/8. This should help address your concern t= o > an extent. > Also you are not testing the mapping from AC (Attachment Circuit) to a > VXLAN tag. > GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , > not using it as an excuse but I am just noting the precedent here. > > In my opinion all you are testing, is that at the other end of an IP > Tunnel a specific VXLAN exist or not. Which does not require running > continuous BFD. > GVP1> There are specific use-cases (see note about Service Node > reachability in Sec 2 of the draft) that require continuous monitoring of > some special-purpose VTEPs. > > In my opinion this is a very in efficient way of getting that information= . > The controller should be able to get this information much more > efficiently. > > It would be good if you can provide an example of what you think is more > coverage than BFD. Or at least what extra coverage do you exactly have in > mind, since this draft is not capable of more coverage than standard BFD > over the IP tunnel. > > Regards, > Shahram > > Regards, > > Shahram > > > > > On Jun 27, 2015, at 7:06 AM, Shahram Davari wrote: > > Hi Prasad , > > I don't see how you get more coverage having a VXLAN tag. > > Since you are not testing the VXLAN based VFI/VRF forwarding. By that I > mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. > GVP1> One of the aspects of the next version of the draft will have a > valid inner DIP instead of 127/8. This should help address your concern t= o > an extent. > Also you are not testing the mapping from AC (Attachment Circuit) to a > VXLAN tag. > GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , > not using it as an excuse but I am just noting the precedent here. > > In my opinion all you are testing, is that at the other end of an IP > Tunnel a specific VXLAN exist or not. Which does not require running > continuous BFD. > GVP1> There are specific use-cases (see note about Service Node > reachability in Sec 2 of the draft) that require continuous monitoring of > some special-purpose VTEPs. > > In my opinion this is a very in efficient way of getting that information= . > The controller should be able to get this information much more efficient= ly. > > > It would be good if you can provide an example of what you think is more > coverage than BFD. Or at least what extra coverage do you exactly have in > mind, since this draft is not capable of more coverage than standard BFD > over the IP tunnel. > > Regards, > Shahram > > > --001a113459840abf6d051a8018dc Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Long and interesting thread :)

How abou= t setting the MAC-DA as the MAC of the sender VTEP?

Thanks!

-Nobo

On Fri, Jul 3, 2015 at 5:39 AM, Shahram = Davari <davari@broadcom.com> wrote:

Sure.

=C2=A0

From: Rtg-bfd = [mailto:rtg-b= fd-bounces@ietf.org] On Behalf Of Shahram Davari
Sent: Thursday, July 02, 2015 11:58 AM
To: Reshad Rahman (rrahman); Shahram Davari
Cc: rtg-bfd@ie= tf.org
Subject: RE: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

=C2=A0

Agree. But we can may be = come up with a more efficient solution.

=C2=A0

Thx
SD

=C2=A0

From: Rtg-bfd = [mailto:rtg-b= fd-bounces@ietf.org] On Behalf Of Reshad Rahman (rrahman)
Sent: Thursday, July 02, 2015 5:46 AM
To: Shahram Davari
Cc: rtg-bfd@ie= tf.org
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

=C2=A0

Hi Shahram,

=C2=A0=

Agreed. My point is that ru= nning BFD on the tunnel is not good enough for some failures.=

=C2=A0=

Regards,

Reshad.=C2=A0=

=C2=A0=

=C2=A0=

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on beha= lf of Shahram Davari <realestate.davari@gmail.com>
Date: Thursday, July 2, 2015 at 12:25 AM
To: Reshad <rrahman@cisco.com>
Cc: Shahram Davari <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>= ;
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

=C2=A0=

Hi Reshad,

=C2=A0=

You don=E2=80=99t need to r= un continuous =C2=A0BFD session per VNI to detect UDP port configuration is= sue. To justify running BFD per VNI, one needs to show that the forwarding of each of those BFD sessions depends on specific VNI value. =C2=A0=C2=A0<= u>

=C2=A0=

Thx

Shahram

=C2=A0=

On Jul 1, 2015, at 6:22 PM,= Reshad Rahman (rrahman) <rrahman@cisco.com> wrote:

=C2=A0=

Hi Shahram,

=C2=A0=

I agree that running BFD be= tween VTEPs per VNI might not scale well. But by just running BFD on the IP= tunnel IMO you won=E2=80=99t detect certain problems, maybe hypothetical, such as the UDP port being blocked (e.g. Due to a misconfigured ACL).

=C2=A0=

Regards,

Reshad.

=C2=A0=

From:=C2=A0= Rtg-bfd <rtg-bfd-bou= nces@ietf.org> on behalf of Shahram Davari <davari@broadcom.com&= gt;
Date:=C2=A0Tuesday, June 30, 2015 at 9:24 PM
To:=C2=A0Santosh P K <santoshpk@juniper= .net>, "S. Davari" <realestat= e.davari@gmail.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.o= rg>
Subject:=C2=A0RE: New Version Notification for draft-sp= allagatti-bfd-vxlan-00.txt

=C2=A0=

Santosh,

=C2=A0

Is the BFD you=C2=A0 are = describing in your draft unicast or multicast? If unicast then service node= s would not apply.<= /p>

=C2=A0

Also if there is a servic= e node then one can run BFD on the IP tunnel between source VTEP and servic= e node and between service node and the destination VTEP. This is much more scalable than running end-to-end BFD between VTEPs per V= NI. You could even use such BFD to switch to a backup service node if there= is failure to the main service node.=

=C2=A0

Thx

Shahram

=C2=A0

From:=C2=A0Santosh P K [mailto:santoshpk@juniper.net]=C2=A0
Sent:=C2=A0Tuesday, June 30, 2015 2:14 AM
To:=C2=A0S. Davari; Shahram Davari;=C2=A0<= a href=3D"mailto:rtg-bfd@ietf.org" target=3D"_blank">rtg-bfd@ietf.org
Subject:=C2=A0RE: New Version Notification for draft-sp= allagatti-bfd-vxlan-00.txt=

=C2=A0

There can be few VTEPs wh= o might have capabilities to multicast the packet. In such a scenario VTEP = will send that packet to service node and service node will do a multicast on its behalf.=C2=A0

=C2=A0

=C2=A0

Thanks

Santosh P K

=C2=A0

From:=C2=A0Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org]=C2=A0On Behalf Of=C2=A0S. Davari
Sent:=C2=A0Monday, June 29, 2015 10:48 AM
To:=C2=A0Shahram Davari;=C2=A0rtg-= bfd@ietf.org
Subject:=C2=A0Re: New Version Notification for draft-sp= allagatti-bfd-vxlan-00.txt=

=C2=A0

Hi<= /p>

=C2=A0

What is a service node?<= u>

=C2=A0

Thx=

=C2=A0

Sd<= /p>

=C2=A0

=C2=A0

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag.=C2=A0

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag.=C2=A0
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= .=C2=A0

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel.=C2=A0

Regards,
Shahram

Regards,

Shahram

=C2=A0


On Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.= com> wrote:

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag.=C2=A0

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag.=C2=A0
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= .=C2=A0

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel.=C2=A0

Regards,
Shahram

=C2=A0=


--001a113459840abf6d051a8018dc-- From nobody Fri Jul 10 06:22:29 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0B8821AC3C1 for ; Fri, 10 Jul 2015 06:22:28 -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, MIME_QP_LONG_LINE=0.001, SPF_PASS=-0.001] autolearn=ham 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 UY-FWyDlh0RX for ; Fri, 10 Jul 2015 06:22:24 -0700 (PDT) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com [IPv6:2607:f8b0:400e:c03::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 ACC101AC3B6 for ; Fri, 10 Jul 2015 06:22:24 -0700 (PDT) Received: by pacgz10 with SMTP id gz10so95202048pac.3 for ; Fri, 10 Jul 2015 06:22:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=6r+upmE4RtFMQN9VZo+6JGUP2n+BZLU6TSOp3lXJEGU=; b=tB/K7yOVOLLjPmzqJ4oBDJ4ThJNX3PHhLFyG9knS86RjfVmlai9UT7yQdHemvg042Z fO3px/IgLrMvr8Bw1fWcVnAlew8eTnfOINEqrmrgBBYclLBejwBUjDMPIXxgAjYaEDyn oMO3iiTukMdJTjMxK7sJl7XWFcPbqAJhEBtYC4o4rbr6Xly4zwblDJvivfpak1AfSf4c 9JFFZ1WBg9WejU+CB8EWShXJmnWOUFqzUqG4RvMsM3sHuoYPdb8NGUdtDv4XLCStSEUJ VNcM06t+FYSVvBuPPEu9EKOcdu3vXFNDKZk7Mpc7tdRS9fEauqU1UIkrUItFaTPK1vp+ nLhg== X-Received: by 10.70.129.143 with SMTP id nw15mr41659246pdb.101.1436534544271; Fri, 10 Jul 2015 06:22:24 -0700 (PDT) Received: from [10.120.197.89] (mobile-166-171-248-215.mycingular.net. [166.171.248.215]) by smtp.gmail.com with ESMTPSA id yr3sm9237362pbb.60.2015.07.10.06.22.21 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 10 Jul 2015 06:22:22 -0700 (PDT) Content-Type: multipart/alternative; boundary=Apple-Mail-2DAD447E-927F-464C-A098-F4942DEB5AF3 Mime-Version: 1.0 (1.0) Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt From: "S. Davari" X-Mailer: iPhone Mail (12B440) In-Reply-To: Date: Fri, 10 Jul 2015 06:22:20 -0700 Content-Transfer-Encoding: 7bit Message-Id: <2279CC94-1E55-487E-9402-07D1055739F0@gmail.com> References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> To: Nobo Akiya Archived-At: Cc: "Reshad Rahman \(rrahman\)" , "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 10 Jul 2015 13:22:28 -0000 --Apple-Mail-2DAD447E-927F-464C-A098-F4942DEB5AF3 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Yes that is the solution. Regards, Shahram > On Jul 10, 2015, at 12:12 AM, Nobo Akiya wrote:= >=20 > Long and interesting thread :) >=20 > How about setting the MAC-DA as the MAC of the sender VTEP? >=20 > Thanks! >=20 > -Nobo >=20 >> On Fri, Jul 3, 2015 at 5:39 AM, Shahram Davari wrot= e: >> Sure. >>=20 >> =20 >>=20 >> From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Shahram Dava= ri >> Sent: Thursday, July 02, 2015 11:58 AM >> To: Reshad Rahman (rrahman); Shahram Davari >> Cc: rtg-bfd@ietf.org >> Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.= txt >>=20 >> =20 >>=20 >> Agree. But we can may be come up with a more efficient solution. >>=20 >> =20 >>=20 >> Thx >> SD >>=20 >> =20 >>=20 >> From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Reshad Rahma= n (rrahman) >> Sent: Thursday, July 02, 2015 5:46 AM >> To: Shahram Davari >> Cc: rtg-bfd@ietf.org >> Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.= txt >>=20 >> =20 >>=20 >> Hi Shahram, >>=20 >> =20 >>=20 >> Agreed. My point is that running BFD on the tunnel is not good enough for= some failures. >>=20 >> =20 >>=20 >> Regards, >>=20 >> Reshad.=20 >>=20 >> =20 >>=20 >> =20 >>=20 >> From: Rtg-bfd on behalf of Shahram Davari >> Date: Thursday, July 2, 2015 at 12:25 AM >> To: Reshad >> Cc: Shahram Davari , "rtg-bfd@ietf.org" >> Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.= txt >>=20 >> =20 >>=20 >> Hi Reshad, >>=20 >> =20 >>=20 >> You don=E2=80=99t need to run continuous BFD session per VNI to detect U= DP port configuration issue. To justify running BFD per VNI, one needs to sh= ow that the forwarding of each of those BFD sessions depends on specific VNI= value. =20 >>=20 >> =20 >>=20 >> Thx >>=20 >> Shahram >>=20 >> =20 >>=20 >> On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) w= rote: >>=20 >> =20 >>=20 >> Hi Shahram, >>=20 >> =20 >>=20 >> I agree that running BFD between VTEPs per VNI might not scale well. But b= y just running BFD on the IP tunnel IMO you won=E2=80=99t detect certain pro= blems, maybe hypothetical, such as the UDP port being blocked (e.g. Due to a= misconfigured ACL). >>=20 >> =20 >>=20 >> Regards, >>=20 >> Reshad. >>=20 >> =20 >>=20 >> From: Rtg-bfd on behalf of Shahram Davari >> Date: Tuesday, June 30, 2015 at 9:24 PM >> To: Santosh P K , "S. Davari" , "rtg-bfd@ietf.org" >> Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.= txt >>=20 >> =20 >>=20 >> Santosh, >>=20 >> =20 >>=20 >> Is the BFD you are describing in your draft unicast or multicast? If uni= cast then service nodes would not apply. >>=20 >> =20 >>=20 >> Also if there is a service node then one can run BFD on the IP tunnel bet= ween source VTEP and service node and between service node and the destinati= on VTEP. This is much more scalable than running end-to-end BFD between VTEP= s per VNI. You could even use such BFD to switch to a backup service node if= there is failure to the main service node. >>=20 >> =20 >>=20 >> Thx >>=20 >> Shahram >>=20 >> =20 >>=20 >> From: Santosh P K [mailto:santoshpk@juniper.net]=20 >> Sent: Tuesday, June 30, 2015 2:14 AM >> To: S. Davari; Shahram Davari; rtg-bfd@ietf.org >> Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.= txt >>=20 >> =20 >>=20 >> There can be few VTEPs who might have capabilities to multicast the packe= t. In such a scenario VTEP will send that packet to service node and service= node will do a multicast on its behalf.=20 >>=20 >> =20 >>=20 >> =20 >>=20 >> Thanks >>=20 >> Santosh P K >>=20 >> =20 >>=20 >> From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari >> Sent: Monday, June 29, 2015 10:48 AM >> To: Shahram Davari; rtg-bfd@ietf.org >> Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.= txt >>=20 >> =20 >>=20 >> Hi >>=20 >> =20 >>=20 >> What is a service node? >>=20 >> =20 >>=20 >> Thx >>=20 >> =20 >>=20 >> Sd >>=20 >> =20 >>=20 >> =20 >>=20 >> Hi Prasad , >>=20 >> I don't see how you get more coverage having a VXLAN tag.=20 >>=20 >> Since you are not testing the VXLAN based VFI/VRF forwarding. By that I m= ean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. >> GVP1> One of the aspects of the next version of the draft will have a val= id inner DIP instead of 127/8. This should help address your concern to an e= xtent. >> Also you are not testing the mapping from AC (Attachment Circuit) to a VX= LAN tag.=20 >> GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , not using it as an excuse but I am just noting the precedent here. >>=20 >> In my opinion all you are testing, is that at the other end of an IP Tunn= el a specific VXLAN exist or not. Which does not require running continuous B= FD. >> GVP1> There are specific use-cases (see note about Service Node reachabil= ity in Sec 2 of the draft) that require continuous monitoring of some specia= l-purpose VTEPs. >>=20 >> In my opinion this is a very in efficient way of getting that information= . The controller should be able to get this information much more efficientl= y.=20 >>=20 >> It would be good if you can provide an example of what you think is more c= overage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over t= he IP tunnel.=20 >>=20 >> Regards, >> Shahram >>=20 >> Regards, >>=20 >> Shahram >>=20 >> =20 >>=20 >>=20 >> On Jun 27, 2015, at 7:06 AM, Shahram Davari wrote: >>=20 >> Hi Prasad , >>=20 >> I don't see how you get more coverage having a VXLAN tag.=20 >>=20 >> Since you are not testing the VXLAN based VFI/VRF forwarding. By that I m= ean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. >> GVP1> One of the aspects of the next version of the draft will have a val= id inner DIP instead of 127/8. This should help address your concern to an e= xtent. >> Also you are not testing the mapping from AC (Attachment Circuit) to a VX= LAN tag.=20 >> GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , not using it as an excuse but I am just noting the precedent here. >>=20 >> In my opinion all you are testing, is that at the other end of an IP Tunn= el a specific VXLAN exist or not. Which does not require running continuous B= FD. >> GVP1> There are specific use-cases (see note about Service Node reachabil= ity in Sec 2 of the draft) that require continuous monitoring of some specia= l-purpose VTEPs. >>=20 >> In my opinion this is a very in efficient way of getting that information= . The controller should be able to get this information much more efficientl= y.=20 >>=20 >> It would be good if you can provide an example of what you think is more c= overage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over t= he IP tunnel.=20 >>=20 >> Regards, >> Shahram >>=20 >=20 --Apple-Mail-2DAD447E-927F-464C-A098-F4942DEB5AF3 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Yes that is the solution.

Regar= ds,
Shahram


On Jul 10, 2015, at 12:12= AM, Nobo Akiya <nobo.akiya.d= ev@gmail.com> wrote:

Long and interesting thread :)

How about set= ting the MAC-DA as the MAC of the sender VTEP?

Than= ks!

-Nobo
On Fri, Jul 3, 2015 at 5:39 AM, Shahram Davari <= span dir=3D"ltr"><davari@broadcom.com> wrote:

Sure.<= /p>

 =

From: Rtg-bfd [ma= ilto:rtg-bfd-b= ounces@ietf.org] On Behalf Of Shahram Davari
Sent: Thursday, July 02, 2015 11:58 AM
To: Reshad Rahman (rrahman); Shahram Davari
Cc: rtg-bfd@iet= f.org
Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan= -00.txt

 

Agree. But we can may be co= me up with a more efficient solution.

 =

Thx
SD

 =

From: Rtg-bfd [mailto:rtg-bfd-b= ounces@ietf.org] On Behalf Of Reshad Rahman (rrahman)
Sent: Thursday, July 02, 2015 5:46 AM
To: Shahram Davari
Cc: rtg-bfd@iet= f.org
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan= -00.txt

 

Hi Shahram,

 

Agreed. My point is that runn= ing BFD on the tunnel is not good enough for some failures.

 

Regards,=

Reshad. 

 

 

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf o= f Shahram Davari <realestate.davari@gmail.com>
Date: Thursday, July 2, 2015 at 12:25 AM
To: Reshad <rrahman@cisco.com>
Cc: Shahram Davari <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan= -00.txt

 

Hi Reshad,

 

You don=E2=80=99t need to run= continuous  BFD session per VNI to detect UDP port configuration issue= . To justify running BFD per VNI, one needs to show that the forwarding of each of those BFD sessions depends on specific VNI value.   

 

Thx

Shahram<= /p>

 

On Jul 1, 2015, at 6:22 PM, R= eshad Rahman (rrahman) <rrahman@cisco.com> wrote:

 

Hi Shahram,

 

I agree that running BFD betw= een VTEPs per VNI might not scale well. But by just running BFD on the IP tu= nnel IMO you won=E2=80=99t detect certain problems, maybe hypothetical, such as the UDP port being blocked (e.g. Due to a misconfigured ACL).

 

Regards,=

Reshad.<= /p>

 

From: Rtg-bfd <rtg-bfd-bounces@= ietf.org> on behalf of Shahram Davari <davari@broadcom.com>= ;
Date: Tuesday, June 30, 2015 at 9:24 PM
To: Santosh P K <santoshpk@juniper.n= et>, "S. Davari" <realestate.davari@gmail= .com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org= >
Subject: RE: New Version Notification for draft-spa= llagatti-bfd-vxlan-00.txt

 

Santosh,

 

Is the BFD you  are de= scribing in your draft unicast or multicast? If unicast then service nodes w= ould not apply.

 

Also if there is a service n= ode then one can run BFD on the IP tunnel between source VTEP and service no= de and between service node and the destination VTEP. This is much more scalable than running end-to-end BFD between VTEPs per VN= I. You could even use such BFD to switch to a backup service node if there i= s failure to the main service node.

 

Thx

Shahram

 

From: Santosh P K [mailto:santoshpk@juniper.net] 
Sent: Tuesday, June 30, 2015 2:14 AM
To: S. Davari; Shahram Davari; rtg-bfd@ietf.org
Subject: RE: New Version Notification for draft-spa= llagatti-bfd-vxlan-00.txt

 

There can be few VTEPs who m= ight have capabilities to multicast the packet. In such a scenario VTEP will= send that packet to service node and service node will do a multicast on its behalf. 

 

 

Thanks

Santosh P K

 

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari
Sent: Monday, June 29, 2015 10:48 AM
To: Shahram Davari; rtg-bf= d@ietf.org
Subject: Re: New Version Notification for draft-spa= llagatti-bfd-vxlan-00.txt

 

Hi

 

What is a service node?

 

Thx<= /p>

 

Sd

 

 

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mean= you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a val= id inner DIP instead of 127/8. This should help address your concern to an e= xtent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLAN= tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel a= specific VXLAN exist or not. Which does not require running continuous BFD.=
GVP1> There are specific use-cases (see note about Service Node reachabil= ity in Sec 2 of the draft) that require continuous monitoring of some specia= l-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. T= he controller should be able to get this information much more efficiently.&= nbsp;

It would be good if you can provide an example of what you think is more cov= erage than BFD. Or at least what extra coverage do you exactly have in mind,= since this draft is not capable of more coverage than standard BFD over the= IP tunnel. 

Regards,
Shahram

Regards,

Shahram

 


On Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.co= m> wrote:

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag. =

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mean= you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a val= id inner DIP instead of 127/8. This should help address your concern to an e= xtent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLAN= tag. 
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel a= specific VXLAN exist or not. Which does not require running continuous BFD.=
GVP1> There are specific use-cases (see note about Service Node reachabil= ity in Sec 2 of the draft) that require continuous monitoring of some specia= l-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. T= he controller should be able to get this information much more efficiently.<= span> 

It would be good if you can provide an example of what you think is more cov= erage than BFD. Or at least what extra coverage do you exactly have in mind,= since this draft is not capable of more coverage than standard BFD over the= IP tunnel. 

Regards,
Shahram

 


= --Apple-Mail-2DAD447E-927F-464C-A098-F4942DEB5AF3-- From nobody Fri Jul 10 07:32:00 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3A3861AD35E for ; Fri, 10 Jul 2015 07:31:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.578 X-Spam-Level: X-Spam-Status: No, score=-1.578 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, IP_NOT_FRIENDLY=0.334, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=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 Jy1Q5vwg_jNe for ; Fri, 10 Jul 2015 07:31:55 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 05CC31B2C45 for ; Fri, 10 Jul 2015 07:30:36 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id 6E4291E434; Fri, 10 Jul 2015 10:32:20 -0400 (EDT) Date: Fri, 10 Jul 2015 10:32:20 -0400 From: Jeffrey Haas To: "Carlos Pignataro (cpignata)" Subject: Re: S-BFD Documents Progress? Message-ID: <20150710143220.GI13783@pfrc.org> References: <4597F9B4-6D67-44E7-95CC-5DAB9A2E839E@cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4597F9B4-6D67-44E7-95CC-5DAB9A2E839E@cisco.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: Cc: "rtg-bfd@ietf.org" , "bfd-chairs@tools.ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 10 Jul 2015 14:31:56 -0000 Carlos, On Fri, Jul 10, 2015 at 01:51:28AM +0000, Carlos Pignataro (cpignata) wrote: > The first set of S-BFD documents finished WG LC about 2 months ago. > > However, they are still in “WG Doc” or “In WGLC” state, with no shepherd assigned and no write-up [1] [2] [3]; their related Milestones are months past due. > > What is the target timeline for submitting these to the IESG? Likely the next day or so. We are running into two issues: - BFD is a small WG and the active participants are also mostly the active authors as well. This means opportunities for assigning impartial shepherds can be tricky. And since Nobo is a contributor on these drafts, the work largely falls to me. - I've been crazy busy at work and have been tardy on a number of IETF items. So, mea culpa. For the future, if we can identify an active WG member set for shepherding at last call time that isn't a chair, we might have better speed the next time. -- Jeff From nobody Fri Jul 10 11:30:17 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2C9991A1AB2 for ; Fri, 10 Jul 2015 11:30:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 jm6iLYH5WVG6 for ; Fri, 10 Jul 2015 11:30:14 -0700 (PDT) Received: from alln-iport-4.cisco.com (alln-iport-4.cisco.com [173.37.142.91]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 66C4D1A1A48 for ; Fri, 10 Jul 2015 11:30:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=4167; q=dns/txt; s=iport; t=1436553014; x=1437762614; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=0u12FmzazTWp26Cg12PoHWoz3a7ONj1mbVm5mtCHdUM=; b=DmZ20nTYc0KxZN1VjFWsPmzeWTFR6WjawJ1pDLKYcZFJ0XUqjcbp7Uiw ojKl5QTMATBu0L3C4sLgIuI5x2KVUx2SaAK+4tqz6PLmZ/JsFZPRRJlxw EvKKkN6RNrA8NrWp3GzAUV8JD1+GeEdmhWsdG7H0xwVl6ZtCJTNuqcCJ2 o=; X-Files: signature.asc : 841 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0C0AwDnDqBV/5JdJa1bgkVNgTQGgxq4EQmHagKBSjgUAQEBAQEBAYEKhCMBAQEDASNWBQsCAQgECgoqAgIyJQIEDgUOiBgIugOWLwEBAQEBAQEBAQEBAQEBAQEBAQEBAReLS4UGB4JoL4EUAQSRSIJpAYIsgVSIA5hrJmODGG+BR4EEAQEB X-IronPort-AV: E=Sophos;i="5.15,448,1432598400"; d="asc'?scan'208,217";a="167534435" Received: from rcdn-core-10.cisco.com ([173.37.93.146]) by alln-iport-4.cisco.com with ESMTP; 10 Jul 2015 18:30:04 +0000 Received: from xhc-aln-x11.cisco.com (xhc-aln-x11.cisco.com [173.36.12.85]) by rcdn-core-10.cisco.com (8.14.5/8.14.5) with ESMTP id t6AIU3J8007051 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 10 Jul 2015 18:30:04 GMT Received: from xmb-aln-x02.cisco.com ([169.254.5.220]) by xhc-aln-x11.cisco.com ([173.36.12.85]) with mapi id 14.03.0195.001; Fri, 10 Jul 2015 13:30:03 -0500 From: "Carlos Pignataro (cpignata)" To: Jeff Haas Subject: Re: S-BFD Documents Progress? Thread-Topic: S-BFD Documents Progress? Thread-Index: AQHQurLw6gou2NBJlU69ARd2UlxkWZ3VGOAAgABCbYA= Date: Fri, 10 Jul 2015 18:30:03 +0000 Message-ID: <9FA4E635-84E5-400B-9522-453BA95CD856@cisco.com> References: <4597F9B4-6D67-44E7-95CC-5DAB9A2E839E@cisco.com> <20150710143220.GI13783@pfrc.org> In-Reply-To: <20150710143220.GI13783@pfrc.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.117.115.52] Content-Type: multipart/signed; boundary="Apple-Mail=_7B873F9C-C645-413C-99A9-EB56AB97F781"; protocol="application/pgp-signature"; micalg=pgp-sha256 MIME-Version: 1.0 Archived-At: Cc: "rtg-bfd@ietf.org" , "bfd-chairs@tools.ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 10 Jul 2015 18:30:16 -0000 --Apple-Mail=_7B873F9C-C645-413C-99A9-EB56AB97F781 Content-Type: multipart/alternative; boundary="Apple-Mail=_6A41A993-3AE5-47EF-8E91-125544748767" --Apple-Mail=_6A41A993-3AE5-47EF-8E91-125544748767 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On Jul 10, 2015, at 10:32 AM, Jeffrey Haas wrote: >=20 >> What is the target timeline for submitting these to the IESG? >=20 > Likely the next day or so. Thank you, Jeff! =E2=80=94 Carlos. --Apple-Mail=_6A41A993-3AE5-47EF-8E91-125544748767 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
On Jul 10, 2015, at 10:32 AM, Jeffrey Haas = <jhaas@pfrc.org> = wrote:

What is the target timeline for submitting these to the = IESG?

Likely the next day or = so.

Thank = you, Jeff!

=E2=80= =94 Carlos.
= --Apple-Mail=_6A41A993-3AE5-47EF-8E91-125544748767-- --Apple-Mail=_7B873F9C-C645-413C-99A9-EB56AB97F781 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJVoA8tAAoJEIXgpQGOZny95p4P/Ry0sgrtsXZAkaVfz0MRZU/N oYylmDjp7mXlC/OhnLo8cV98dYdr3kqygOWknsU5KeevnkQBJSIw9mYzojRO/VHR HBuq6x4zpgeyEGn4NuIdUDk/DCJwro9YS95OhTOeQ6h8RGjiAWb6ax/banwNQovI 64apDl4fLYf4u/y2LosEC9MavNaj27wRHQnP8iLLavLln/RdCe43QqbKLMpjrmQ7 QSM1EOGDFYFClasRNuOkUUFCeyUijqDO+dNSSG+Hqy8eOs0KCjiKfm18zbWHuav1 VWBFceY4XrWdUxtFvSXtYO28yREErMVqF4BSLM89htbqvqKzUuVQo8v3XvoB6U0p vZuBz8xFPu2on63kgQFjIX43zrd/p4rwBRGB1IlynfzgbzI9H5Wxu/U/1D1xDpIh OAKimQC5jQyJrY20WG3S2gog8G3fAWZs66oonQLS90cBQ64ldxp8CAVFyVOCRpmZ JQErUPlt35tGrCVD9Z+8+aDcdZwQtm/0AzWG+gLhT8K6IVZyEbHc1SNfaGLd9sYy +CKwNh2oYeA/+yhbnJY71FuREVDlRe7tuPN2jm0uyX4acp4uZXm5sxdLUr9w12lC m2i/cQ1hLRhlfHCBE94+LB5o9D27zDyKVIkSLrPbHsyf06EgmFpT+hEv+l9NJ4+S HnPvsM6QjzV0jssFUG3Q =MM+L -----END PGP SIGNATURE----- --Apple-Mail=_7B873F9C-C645-413C-99A9-EB56AB97F781-- From nobody Fri Jul 10 17:45:48 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 63D731AD05D for ; Fri, 10 Jul 2015 07:01:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.901 X-Spam-Level: X-Spam-Status: No, score=-1.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham 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 4PO9aGg7hdqV for ; Fri, 10 Jul 2015 07:01:28 -0700 (PDT) Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2on0105.outbound.protection.outlook.com [207.46.100.105]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AE6761AD05B for ; Fri, 10 Jul 2015 07:01:28 -0700 (PDT) Received: from SN1PR0501MB1760.namprd05.prod.outlook.com (10.163.130.27) by SN1PR0501MB1758.namprd05.prod.outlook.com (10.163.130.25) with Microsoft SMTP Server (TLS) id 15.1.213.14; Fri, 10 Jul 2015 14:01:26 +0000 Received: from SN1PR0501MB1760.namprd05.prod.outlook.com ([10.163.130.27]) by SN1PR0501MB1760.namprd05.prod.outlook.com ([10.163.130.27]) with mapi id 15.01.0213.000; Fri, 10 Jul 2015 14:01:26 +0000 From: Santosh P K To: "S. 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<315041E4211CB84E86EF7C25A2AB583D5459776E@xmb-rcd-x15.cisco.com> References: <20150521135940.GA25032@pfrc.org> In-Reply-To: <20150521135940.GA25032@pfrc.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.65.49.140] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 14 Jul 2015 03:49:56 -0000 Hello Jeff, I have re-submitted the document after addressing comments from Santosh, = who has also acknowledged support for WGLC. I believe all authors should ha= ve submitted IPR disclosures as well (please let me know if anything is mis= sing). Can you please progress the document to the next stage if you deem i= t fit. Thanks Prasad -----Original Message----- From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Jeffrey Haas Sent: Thursday, May 21, 2015 7:30 PM To: rtg-bfd@ietf.org Subject: Status of WGLCs The S-BFD documents - use cases, base and IP - have passed WGLC. However, = there are authors who still haven't made their IPR attestations. Thus the = S-BFD documents are in a holding pattern until we get these last attestatio= ns. =20 For draft-ietf-bfd-rfc5884-clarifications, we still haven't gotten IPR atte= stations from Kalyani Rajaraman and Sam Aldrin. More importantly, no one h= as actually stated that they believe this document is ready to progress. S= antosh P K has also noted some items that must be addressed before the docu= ment can progres. -- Jeff From nobody Wed Jul 15 07:30:06 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B82481A0103 for ; Wed, 15 Jul 2015 02:21:46 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -104.21 X-Spam-Level: X-Spam-Status: No, score=-104.21 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham 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 kv5_7lUxx_JL for ; Wed, 15 Jul 2015 02:21:44 -0700 (PDT) Received: from mx6.zte.com.cn (mx6.zte.com.cn [95.130.199.165]) by ietfa.amsl.com (Postfix) with ESMTP id 1754A1A00BF for ; Wed, 15 Jul 2015 02:21:43 -0700 (PDT) Received: from zte.com.cn (unknown [192.168.168.119]) by Websense Email Security Gateway with ESMTP id 9606AC657757F for ; Wed, 15 Jul 2015 17:17:20 +0800 (CST) Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Websense Email Security Gateway with ESMTPS id E1F4A3F4C18E for ; Wed, 15 Jul 2015 17:21:35 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id t6F9LARZ083728 for ; Wed, 15 Jul 2015 17:21:10 +0800 (GMT-8) (envelope-from peng.shaofu@zte.com.cn) To: rtg-bfd@ietf.org Subject: issues about draft-ietf-bfd-rfc5884-clarifications-02 MIME-Version: 1.0 X-Mailer: Lotus Notes Release 6.5.6 March 06, 2007 Message-ID: From: peng.shaofu@zte.com.cn Date: Wed, 15 Jul 2015 17:21:09 +0800 X-MIMETrack: Serialize by Router on notes_smtp/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2015-07-15 17:20:50, Serialize complete at 2015-07-15 17:20:50 Content-Type: multipart/alternative; boundary="=_alternative 003360F148257E83_=" X-MAIL: mse01.zte.com.cn t6F9LARZ083728 Archived-At: X-Mailman-Approved-At: Wed, 15 Jul 2015 07:30:04 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 15 Jul 2015 09:21:46 -0000 This is a multipart message in MIME format. --=_alternative 003360F148257E83_= Content-Type: text/plain; charset="US-ASCII" hi authors It is neccessary to address the case that different ingress LSR establish BFD session with the same egress LSR, with same FEC, same local descriminator. I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo request message, to distinguish different ingress LSR. So that ingress allocate LD based on tuple as defined in this draft, but egress allocate LD based on tuple . thanks deccan -------------------------------------------------------- ZTE Information Security Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s). If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited. If you have received this mail in error, please delete it and notify us immediately. -------------------------------------------------------- ZTE Information Security Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s). If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited. If you have received this mail in error, please delete it and notify us immediately. --=_alternative 003360F148257E83_= Content-Type: text/html; charset="US-ASCII"
hi authors

It is neccessary to address the case that different ingress LSR establish BFD session with the same egress LSR, with same FEC, same local descriminator.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo request message, to distinguish different ingress LSR. So that ingress allocate LD based on tuple <FEC, LSP> as defined in this draft, but egress allocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan 


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--=_alternative 003360F148257E83_=-- From nobody Wed Jul 15 08:01:28 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7CE351AC3FD for ; Wed, 15 Jul 2015 07:42:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.009 X-Spam-Level: X-Spam-Status: No, score=-2.009 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_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham 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 SeHWFHaas_zP for ; Wed, 15 Jul 2015 07:42:16 -0700 (PDT) Received: from nm18-vm0.bullet.mail.bf1.yahoo.com (nm18-vm0.bullet.mail.bf1.yahoo.com [98.139.213.138]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D49911AC3D7 for ; Wed, 15 Jul 2015 07:42:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1436971335; bh=1v6zk/oLTmdZylp7CooRZYsqbdE7+X6rlZGj189tolc=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From:Subject; b=qVDMGHjmi+btJtZo0kaArDB/YNmI2l1wyKEZaC33J9/iEoZFjyAH1ouZKu9dYqTrfBgcRIfjl7tkJBLjkwtr4tue4dFwleeZcYYSEaJm2rIHyVHxDyhGlj2T29xHj+wc4GaTfR7lRO6uhJNRttlqKaPdo95HYmQD7dD4lOWJ9DVO/3M7fOtNapvnCTnJFIeR7Sn1d70ZKdNEwxyFS3uRkdz0aGhRYZ/IxG3aViyOGlsR5tEmosH/8qHzK1dh8JaFEOpraLWpVyhszMUTnt0BgZ604dstTc9vcPVtmoDB4EzfUZ/Y0S+ghV0D/j4L2nAmD5CNkpuhk85HmSaNtzfYSQ== Received: from [98.139.170.180] by nm18.bullet.mail.bf1.yahoo.com with NNFMP; 15 Jul 2015 14:42:15 -0000 Received: from [98.139.211.207] by tm23.bullet.mail.bf1.yahoo.com with NNFMP; 15 Jul 2015 14:42:15 -0000 Received: from [127.0.0.1] by smtp216.mail.bf1.yahoo.com with NNFMP; 15 Jul 2015 14:42:15 -0000 X-Yahoo-Newman-Id: 90645.59554.bm@smtp216.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: 21hXW3wVM1kjZ_e87dP4gQaJMJaxua503bN8WePpZk7VSaF IjTtLKJagAhcfxVNTVvJ10P8N97Ko2zA138oIUFn7u2T.MqIN8UW5_zZsmv1 fCMUROUot_HjXRWRYg7A6LfoI6QpLA.dmYz0ilEPgnWQVZYcJ0GQ3iMGBfkA nUHC4.sdK.rJue4_hnQGsA70EWgo1Qlvl1r3E8.4rLgM8bprh779rNHRZHq. 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Davari" X-Mailer: iPhone Mail (12B440) In-Reply-To: Date: Wed, 15 Jul 2015 07:42:12 -0700 Content-Transfer-Encoding: 7bit Message-Id: References: To: "peng.shaofu@zte.com.cn" Archived-At: X-Mailman-Approved-At: Wed, 15 Jul 2015 08:01:26 -0700 Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 15 Jul 2015 14:42:17 -0000 --Apple-Mail-A5426EDD-085D-4660-AB7B-DF40DD25AA2A Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Hi Why can't the ingress allocate different LD to each of those BFD sessions? Regards, Shahram > On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" wrote: >=20 >=20 > hi authors=20 >=20 > It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminator= .=20 > I think it is very useful to introduce a BFD Initiator TLV to LSP ping ech= o request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple as defined in this draft, but egress allo= cate LD based on tuple .=20 >=20 > thanks=20 > deccan=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 --Apple-Mail-A5426EDD-085D-4660-AB7B-DF40DD25AA2A Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit
Hi

Why can't the ingress allocate different LD to each of those BFD sessions?

Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:


hi authors

It is neccessary to address the case that different ingress LSR establish BFD session with the same egress LSR, with same FEC, same local descriminator.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo request message, to distinguish different ingress LSR. So that ingress allocate LD based on tuple <FEC, LSP> as defined in this draft, but egress allocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan 


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--Apple-Mail-A5426EDD-085D-4660-AB7B-DF40DD25AA2A-- From nobody Wed Jul 15 23:16:14 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 20B501B31A4 for ; Wed, 15 Jul 2015 23:16:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 Sf2dCL_c60yw for ; Wed, 15 Jul 2015 23:16:12 -0700 (PDT) Received: from alln-iport-5.cisco.com (alln-iport-5.cisco.com [173.37.142.92]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 43F801B3195 for ; Wed, 15 Jul 2015 23:16:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=7148; q=dns/txt; s=iport; t=1437027373; x=1438236973; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=MBq+uTNNVZAvhUXtGrqdOgyjbS5Jn53h897RdaSj/GU=; b=Cju7fk49aJSOuXtcp8o7CscdOS2einlLQzsH66Tk0kY0WhvVGqdNKwj8 legH4MoycKmW5kYRo4wh9I1SdzE/E9OhgA7wER6H5JMZx1KhFz41a026h 1/bL21Z/prZmspEiATj0Mzid8PKALALjwhxp3sgOJK/0DCiBeICJu0kJb I=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0BJAwBKS6dV/4UNJK1agkZNgT0GrAyPLgmHbQKBSTgUAQEBAQEBAYEKhCMBAQEEeRACAQgRAwECKAcfExMBCQgCBAENBYgZAxLPRQEBAQEBAQEBAQEBAQEBAQEBAQEBAReLTIJNgWcBASUaEQcCBIQlAQSFXgyBIY0zAQmJZEWBYIFAFYQEi3mHJiaDfG+BDTqBBAEBAQ X-IronPort-AV: E=Sophos;i="5.15,485,1432598400"; d="scan'208,217";a="169196554" Received: from alln-core-11.cisco.com ([173.36.13.133]) by alln-iport-5.cisco.com with ESMTP; 16 Jul 2015 06:16:12 +0000 Received: from xhc-aln-x06.cisco.com (xhc-aln-x06.cisco.com [173.36.12.80]) by alln-core-11.cisco.com (8.14.5/8.14.5) with ESMTP id t6G6GBDY019837 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 16 Jul 2015 06:16:11 GMT Received: from xmb-rcd-x05.cisco.com ([169.254.15.132]) by xhc-aln-x06.cisco.com ([173.36.12.80]) with mapi id 14.03.0195.001; Thu, 16 Jul 2015 01:16:11 -0500 From: "MALLIK MUDIGONDA (mmudigon)" To: "S. Davari" , "peng.shaofu@zte.com.cn" Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Topic: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Index: AQHQvwrFrwuXUKQGrUmeAwwRsv5Y553c7poAgAFhKAA= Date: Thu, 16 Jul 2015 06:16:10 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.143.25.169] Content-Type: multipart/alternative; boundary="_000_D1CD49814517mmudigonciscocom_" MIME-Version: 1.0 Archived-At: Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 16 Jul 2015 06:16:14 -0000 --_000_D1CD49814517mmudigonciscocom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I think the question is 2 different ingress LSRs using the same FEC, LSP, D= iscriminator values. Discriminator values can be the same for 2 different i= ngress LSRs and if the other values are same we can always use the Source a= ddress to differentiate. Am I missing something? Regards Mallik From: "S. Davari" > Date: Wednesday, 15 July 2015 20:12 To: "peng.shaofu@zte.com.cn" > Cc: "rtg-bfd@ietf.org" > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 Hi Why can't the ingress allocate different LD to each of those BFD sessions? Regards, Shahram On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" > wrote: hi authors It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminato= r. I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo= request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple as defined in this draft, but egress all= ocate LD based on tuple . thanks deccan -------------------------------------------------------- ZTE Information Security Notice: The information contained in this mail (an= d any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an in= tended recipient, any disclosure, reproduction, distribution or other disse= mination or use of the information contained is strictly prohibited. If yo= u have received this mail in error, please delete it and notify us immediat= ely. -------------------------------------------------------- ZTE Information Security Notice: The information contained in this mail (an= d any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an in= tended recipient, any disclosure, reproduction, distribution or other disse= mination or use of the information contained is strictly prohibited. If yo= u have received this mail in error, please delete it and notify us immediat= ely. --_000_D1CD49814517mmudigonciscocom_ Content-Type: text/html; charset="us-ascii" Content-ID: <569F1AA9D3E55F4798FE4EE5A1F3C159@emea.cisco.com> Content-Transfer-Encoding: quoted-printable
Hi,

I think the question is 2 different ingress LSRs using the same FEC, L= SP, Discriminator values. Discriminator values can be the same for 2 differ= ent ingress LSRs and if the other values are same we can always use the Sou= rce address to differentiate. Am I missing something?

Regards
Mallik

From: "S. Davari" <davarish@yahoo.com>
Date: Wednesday, 15 July 2015 20:12=
To: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>
Cc: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: issues about draft-iet= f-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD to each of those BFD sessi= ons?

Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:


hi authors

It is neccessary to address the case t= hat different ingress LSR establish BFD session with the same egress LSR, w= ith same FEC, same local descriminator.
I think it is very useful to introduce= a BFD Initiator TLV to LSP ping echo request message, to distinguish diffe= rent ingress LSR. So that ingress allocate LD based on tuple <FEC, LSP&g= t; as defined in this draft, but egress allocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan 


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d any attachment transmitted herewith) is privileged and confidential and i=
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tended recipient, any disclosure, reproduction, distribution or other disse=
mination or use of the information contained is strictly prohibited.  If yo=
u have received this mail in error, please delete it and notify us immediat=
ely.





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Hello Decc= an, MALLIK and Shahram,

 &nbs= p;   I want to understand why do we need this? When BFD boot= strapping is completed then we use local discr (BFD packet your discr) as a key which will be unique with in the local system. Please take a look= at below section of RFC 5880.

 = ;

https://tools.ietf.org/ht= ml/rfc5880#section-6.3

 = ;

We don=A1= =AFt need to really use any other fields as we would have exchanged the dis= cr using LSP ping. I might have misunderstood your question and would like to be corrected.

 = ;

 = ;

Thanks

Santosh P = K

 = ;

From: Rtg-bfd [mailto:rtg-bfd-bounce= s@ietf.org] On Behalf Of peng.shaofu@zte.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org; S. Davari
Subject: =B4= =F0=B8=B4: Re: issues about draft-ietf-bfd-rfc5884-clarifications-0= 2

 


H= i Mallik

S= ource address is also a good method. But it is better to form as standard.<= /span>

t= hanks



"MALLIK MUDIGONDA (mmudigon)" <mmudigon@cisco.com>

2015-07-16 =CF=C2=CE=E7 02:16

=CA=D5=BC=FE=C8=CB<= /p>

"S. Davari" <davarish@yahoo.com>, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>

=B3=AD=CB=CD

"rtg-bfd@ietf= .org" <rtg-bfd@ietf.org= >

=D6=F7=CC=E2

Re: issues about draft-ietf-bfd-rfc5884-clarifications= -02

 




Hi,

I think the question is 2 different ingress LSRs using the same FEC, LSP, = Discriminator values. Discriminator values can be the same for 2 different = ingress LSRs and if the other values are same we can always use the Source address to differentiate. Am I missing someth= ing?

Regards
Mallik

From: "S. Davari" <davarish@yahoo.com>
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaof= u@zte.com.cn" <peng.shaofu@zte.com.cn>
Cc: "rtg-bfd@ietf.org<= /span>" <rtg-bfd@i= etf.org>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD to each of those BFD sessions?=

Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:

<= br> hi authors

It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminato= r.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo= request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple <FEC, LSP> as defined in this draft, but egre= ss allocate LD based on tuple <Initiator, FEC, RD>.

thanks <= br> deccan


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MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 3MNeqCSNmbwE for ; Thu, 16 Jul 2015 22:14:57 -0700 (PDT) Received: from alln-iport-2.cisco.com (alln-iport-2.cisco.com [173.37.142.89]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E75011B2C63 for ; Thu, 16 Jul 2015 22:14:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=29043; q=dns/txt; s=iport; t=1437110097; x=1438319697; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=0xubjrSnM0rrGykz+4PQinK/ZFan87mmYSf02JqKCvc=; b=IrC88XItL6x0x09Z5IYgN7vN2t5bGUd7Pg/5Ty0giYGyeoeO8/7L+ZNT YHcWteAu68fJkFFn4p3KdNyM+IcWG4E47KAMvlXH0FL2e8lLBIGq0Si9e 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(mmudigon)" To: Santosh P K , "S. Davari" Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Topic: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Index: AQHQwEgWRYhetmnZMkyNRGuIJC/D+J3fa9wAgABijwA= Date: Fri, 17 Jul 2015 05:14:38 +0000 Message-ID: References: <7CD7F2E3-88E5-4237-8FCC-BA95FAD7F281@yahoo.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.143.25.169] Content-Type: multipart/alternative; boundary="_000_D1CE8CCE459Ammudigonciscocom_" MIME-Version: 1.0 Archived-At: Cc: "peng.shaofu@zte.com.cn" , "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 17 Jul 2015 05:15:00 -0000 --_000_D1CE8CCE459Ammudigonciscocom_ Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 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--_000_D1CE8CCE459Ammudigonciscocom_ Content-Type: text/html; charset="gb2312" Content-ID: <6830FA579569B4438477FCC573609636@emea.cisco.com> Content-Transfer-Encoding: quoted-printable
Hi,

The question is even with LSP ping, how to de-mutiplex if all the para= meters are the same. That=A1=AFs where the source address comes into pictur= e. 

Thanks

Regards
Mallik

From: Santosh P K <santoshpk@juniper.net>
Date: Friday, 17 July 2015 10:21 To: "S. Davari" <davarish@yahoo.com>
Cc: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>, Mallik Mudigonda <<= a href=3D"mailto:mmudigon@cisco.com">mmudigon@cisco.com>, "rtg-bfd@ietf.org" <<= a href=3D"mailto:rtg-bfd@ietf.org">rtg-bfd@ietf.org>
Subject: RE: issues about draft-iet= f-bfd-rfc5884-clarifications-02

Sharam,

   True but here it is 58= 84 and for 5884 (MPLS BFD) we do bootstrapping using LSP ping and that exch= ange discr right? So you should ideally not receive any BFD packet with your_disc =3D 0.

 

Thanks

Santosh P K

 

From: S. Davari [mailto:davarish@yahoo.com]
Sent: Friday, July 17, 2015 9:51 AM
To: Santosh P K
Cc: peng.shaofu@zte.com.cn= ; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

 

Hi Santosh

 

I think the issue is the first BFD packet that has y= our Desc =3D0. Question is how to differentiate them when they are from dif= ferent ingress LSR.


Regards,

Shahram

 


On Jul 16, 2015, at 8:48 PM, Santosh P K <santoshpk@juniper.net> wrote:

Hello Deccan, MALLIK and Shahram,

     I wan= t to understand why do we need this? When BFD bootstrapping is completed th= en we use local discr (BFD packet your discr) as a key which will be unique with in the local system. Please take a look at below secti= on of RFC 5880.

 

https://tools.ietf.org/html/rfc5880#section-6.3

 

We don=A1=AFt need to really use an= y other fields as we would have exchanged the discr using LSP ping. I might= have misunderstood your question and would like to be corrected.

 

 

Thanks

Santosh P K

 

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@z= te.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org; S. Dav= ari
Subject: =B4= =F0=B8=B4: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02<= o:p>

 


Hi Mallik<= /span>

Source add= ress is also a good method. But it is better to form as standard.
thanks




"MALLIK MUDIGONDA (mmudigon)" <mmudigon@cisco.com>

2015-0= 7-16 =CF=C2=CE=E7 02:16=

=CA=D5=BC=FE=C8=CB<= /p>

"S. Davari" <davarish@yahoo.com>, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>

=B3=AD=CB=CD

"rtg-bfd@ietf.org" <rtg-bfd@ietf.org>

=D6=F7=CC=E2

Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

 




Hi,

I think = the question is 2 different ingress LSRs using the same FEC, LSP, Discrimin= ator values. Discriminator values can be the same for 2 different ingress L= SRs and if the other values are same we can always use the Source address to differentiate. Am I missing someth= ing?

Regards<= /span>
Mallik

From:= &quo= t;S. Davari" <davarish@yahoo.c= om>
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaofu@zte.com= .cn" <peng.shaofu@zte.c= om.cn>
Cc: "rtg-bfd@ietf.org" = <rtg-bfd@ietf.org>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can'= t the ingress allocate different LD to each of those BFD sessions?

Regards,
Shahram<= /span>


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:


hi authors
 It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminato= r.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo= request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple <FEC, LSP> as defined in this draft, but egre= ss allocate LD based on tuple <Initiator, FEC, RD>.
 thanks
deccan


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Mallik,

 &nbs= p; When a BFD packet is received with your_disc as non-zero then we use onl= y that as demux entity. Your_discr is a value allocated by local router and should be unique across the system. So where is the qu= estion of having any other field to be used as demux? Are you talking about= same discr for BFD session for same LSP in case of ECMP? Can you please ex= plain more in detail what is the scenario? I might have missed some basic thing here.

 = ;

 = ;

Thanks

Santosh P = K

 = ;

From: MALLIK MUDIGONDA (mmudigon) [m= ailto:mmudigon@cisco.com]
Sent: Friday, July 17, 2015 10:45 AM
To: Santosh P K; S. Davari
Cc: peng.shaofu@zte.com.cn; rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

 

Hi,

 

The question is even with LSP ping, how= to de-mutiplex if all the parameters are the same. That=A1=AFs where the s= ource address comes into picture. 

 

Thanks

 

Regards

Mallik

 

From: Santosh P K <santoshpk@juniper.net>
Date: Friday, 17 July 2015 10:21
To: "S. Davari" <= davarish@yahoo.com>
Cc: "peng.shaofu@zte.= com.cn" <peng.shaofu@= zte.com.cn>, Mallik Mudigonda <mmudigon@cisco.com>, "r= tg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02

 

Sharam,

   True but here it is 5884= and for 5884 (MPLS BFD) we do bootstrapping using LSP ping and that exchan= ge discr right? So you should ideally not receive any BFD packet with your_disc =3D 0.

 

Thanks

Santosh P K

 

From: S. Dav= ari [mailto:davarish@yahoo.com]
Sent: Friday, July 17, 2015 9:51 AM
To: Santosh P K
Cc: peng.shaofu@zte.com.cn= ; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

 =

Hi Santosh

 =

I think the issue is the= first BFD packet that has your Desc =3D0. Question is how to differentiate= them when they are from different ingress LSR.


Regards,

Shahram

 =


On Jul 16, 2015, at 8:48 PM, Santosh P K <santoshpk@juniper.net> wrote:

Hello Deccan, MALLIK and Shahram,

     I want = to understand why do we need this? When BFD bootstrapping is completed then= we use local discr (BFD packet your discr) as a key which will be unique with in the local system. Please take a look at below section of RFC 5880.=

 

https://tools.ietf.org/html/rfc5880#section-6.3<= /span>

 

We don=A1=AFt need to really use any = other fields as we would have exchanged the discr using LSP ping. I might h= ave misunderstood your question and would like to be corrected.

 

 

Thanks

Santosh P K

 

From: Rtg-bf= d [mailto:rtg-bfd-bounces@ietf.= org] On Behalf Of peng.shaofu@z= te.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org; S. Dav= ari
Subject: =B4=F0=B8=B4: Re: issues about draft-ietf-bfd-r= fc5884-clarifications-02

 =


Hi Mallik

Source address is also a good method. But it is better to= form as standard.

thanks





"MALLIK MUDIGONDA (mmudigon)" <mmudigon@cisco.com>

2015-07-16 =CF=C2=CE=E7 02:16

=CA=D5=BC=FE=C8=CB<= /p>

"S. Davari" <davarish@yahoo.com>, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>

=B3=AD=CB=CD

"rtg-bfd@ietf= .org" <rtg-bfd@ietf.org= >

=D6=F7=CC=E2

Re: issues about draft-ietf-bfd-rfc5884-clarifications= -02

 




Hi,

I think the question is 2 different ingress LSRs using = the same FEC, LSP, Discriminator values. Discriminator values can be the sa= me for 2 different ingress LSRs and if the other values are same we can always use the Source address to differentiate. Am = I missing something?

Regards
Mallik

From: "S. Davari" <davarish@yahoo.com<= /a>>
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaofu@zte.com.cn"= ; <peng.shaofu@zte.com.cn>
Cc: "rtg-bfd@ietf.org" <rtg-bfd@i= etf.org>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD to each of = those BFD sessions?

Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:


hi authors

It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminato= r.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo= request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple <FEC, LSP> as defined in this draft, but egre= ss allocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan


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Hi  Malik,

I cannot see scenario whe= n bootstrapping LSP Ping has the same source IP address and BFD Discriminat= or. Something must be different. Consider two nodes with ECMP =A8C A and B. A bootstraps two FD sessions with two LSP Pings. True, = IP Source addresses are the same in both as well as FEC. But Discriminators= will be different as they must e unique within the same node. Right? If th= e case of three nodes when two set BFD sessions to the same FEC on the third and accidentally pick the same D= iscriminator, then IP source addresses must be different between them. Am I= missing something?

 <= /p>

    &= nbsp;           Regards,<= o:p>

    &= nbsp;           &nbs= p;            &= nbsp;  Greg

 <= /p>

From: Rtg-bfd = [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of MALLIK MUDIGONDA (mmudigon)
Sent: Thursday, July 16, 2015 10:15 PM
To: Santosh P K; S. Davari
Cc: peng.shaofu@zte.com.cn; rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

 

Hi,

 

The question is even with L= SP ping, how to de-mutiplex if all the parameters are the same. That=A1=AFs= where the source address comes into picture. 

 

Thanks

 

Regards

Mallik

 

From: Santosh P K <santoshpk@juniper.net>
Date: Friday, 17 July 2015 10:21
To: "S. Davari" <= davarish@yahoo.com>
Cc: "peng.shaofu@zte.= com.cn" <peng.shaofu@= zte.com.cn>, Mallik Mudigonda <mmudigon@cisco.com>, "r= tg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02

 

Sharam,

   True but her= e it is 5884 and for 5884 (MPLS BFD) we do bootstrapping using LSP ping and= that exchange discr right? So you should ideally not receive any BFD packet with your_disc =3D 0. <= /o:p>

 

Thanks

Santosh P K

 

From: S. Davari [mailto:d= avarish@yahoo.com]
Sent: Friday, July 17, 2015 9:51 AM
To: Santosh P K
Cc: peng.shaofu@zte.com.cn= ; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

 =

Hi Santosh

 =

I think the issue is the= first BFD packet that has your Desc =3D0. Question is how to differentiate= them when they are from different ingress LSR.


Regards,

Shahram

 =


On Jul 16, 2015, at 8:48 PM, Santosh P K <santoshpk@juniper.net> wrote:

Hello Deccan, MALLIK and = Shahram,

    &= nbsp;I want to understand why do we need this? When BFD bootstrapping is co= mpleted then we use local discr (BFD packet your discr) as a key which will= be unique with in the local system. Please take a look at below section of RFC 5880.=

 

https://tools.ietf.org/html/rfc5880#sect= ion-6.3

 

We don=A1=AFt need to rea= lly use any other fields as we would have exchanged the discr using LSP pin= g. I might have misunderstood your question and would like to be corrected.

 

 

Thanks

Santosh P K

 

From: Rtg-bfd [mail= to:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@z= te.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org; S. Dav= ari
Subject: =B4=F0=B8=B4: Re: issues about draf= t-ietf-bfd-rfc5884-clarifications-02

 =


Hi Mallik

Source address is also a good method. But it = is better to form as standard.

thanks





"MALLIK MUDIGONDA (mmudigon)"= <mmudigon@cisco.com>

2015-07-16 =CF=C2=CE=E7 02:16

=CA=D5=BC=FE=C8=CB<= /p>

"S. Davari" <davarish@yahoo.com>, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>=

=B3=AD=CB=CD

"= rtg-bfd@ietf.org" <rtg-bfd@= ietf.org>

=D6=F7=CC=E2

Re: issues about draft-ietf-bfd-rfc5884-cl= arifications-02

 




Hi,

I think the question is 2 different ingress= LSRs using the same FEC, LSP, Discriminator values. Discriminator values c= an be the same for 2 different ingress LSRs and if the other values are same we can always use the Source address to differentiat= e. Am I missing something?

Regards
Mallik

From: "S. Davari" <da= varish@yahoo.com>
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>
Cc: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD= to each of those BFD sessions?

Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:


hi authors

It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminato= r.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo= request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple <FEC, LSP> as defined in this draft, but egre= ss allocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan


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Hi,

Yes, for P2P the LSP should be different for the ingress routers which= should help identify a session. For MP2P sessions, we will have the same p= arameters for all ingresses and so Source should be able to identify an app= ropriate session.

Regards
Mallik

From: "S. Davari" <davarish@yahoo.com>
Date: Friday, 17 July 2015 12:45 To: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>
Cc: Santosh P K <santoshpk@juniper.net>, Mallik Mudigonda &= lt;mmudigon@cisco.com>, "= rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: =B4=F0=B8=B4: RE: issu= es about draft-ietf-bfd-rfc5884-clarifications-02

Peng

I think you are assuming mp2p LSP. Since for P2P 
LSP we won't have this problem. Right?

Regards,
Shahram


On Jul 17, 2015, at 12:03 AM, pen= g.shaofu@zte.com.cn wrote:


Hi Santosh

For example, there are two diferrent i= ngress (LSR1 & LSR2) want to establish BFD session with the same egress= (LSR3) for same FEC (3.3.3.9/32). PLease see the following steps.
step1: LSR1 construct an LSP echo requ= est message, including LSR1-LD (100) and FEC (3.3.3.9/32)
step2: LSR3 received the echo request = message, if FEC validation check succeed, it will NEW a BFD entity, allocat= e LSR3-LD (200) based on tuple <FEC, LSR1-LD>.
       Now LSR3 ca= n send a BFD control packet with MD=3D200 YD=3D100.
step3: LSR2 also construct an LSP echo= request message, including LSR2-LD (100) and FEC (3.3.3.9/32)
step4: LSR3 received the echo request = message, if FEC validation check succeed, it will match to the above alread= y existing BFD session, because tuple <FEC, LSR2-LD> equal <FEC, L= SR1-LD>

thanks
Deccan



Santosh P K <<= a href=3D"mailto:santoshpk@juniper.net">santoshpk@juniper.net>

2015-07-17 =CF=C2=CE=E7 01:27

=CA=D5=BC=FE=C8= =CB
 "MALLIK MUDIGONDA (mmudigon)&= quot; <mmudigon@cisco.com>,= "S. Davari" <davarish@y= ahoo.com>
=B3=AD=CB=CD
 "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
=D6=F7=CC=E2
 RE: issues about draft-ietf-bfd-rf= c5884-clarifications-02





Mallik,
   When a BFD= packet is received with your_disc as non-zero then we use only that as dem= ux entity. Your_discr is a value allocated by local router and should be un= ique across the system. So where is the question of having any other field to be used as demux? Are you talking about same = discr for BFD session for same LSP in case of ECMP? Can you please explain = more in detail what is the scenario? I might have missed some basic thing h= ere.
 
 
Thanks
Santosh P K
 
From: MALLIK MUDIGONDA (mmudigon) = [mailto:mmudigon@cisco.com]
Sent: Friday, July 17, 2015 10:45 AM
To: Santosh P K; S. Davari
Cc: peng.shaofu@zte.com.cn; rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Hi,
 
The question is even with LSP ping, how t= o de-mutiplex if all the parameters are the same. That=A1=AFs where the sou= rce address comes into picture.
 
Thanks
 
Regards
Mallik
 
From: Santosh P K <santoshpk@juniper.net>
Date: Friday, 17 July 2015 10:21
To: "S. Davari" <davarish@yahoo.com<= /u>>
Cc: "peng.shaofu@zte.com.cn= " <= peng.shaofu@zte.com.cn>= , Mallik Mudigonda <mmudigon@cisco.com>, "rtg-bfd= @ietf.org" <rtg-bfd@ietf.org>
Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Sharam,
   True but h= ere it is 5884 and for 5884 (MPLS BFD) we do bootstrapping using LSP ping a= nd that exchange discr right? So you should ideally not receive any BFD pac= ket with your_disc =3D 0.
 
Thanks
Santosh P K
 
From: S. Davari [mailto:davarish@yahoo.com]
Sent: Friday, July 17, 2015 9:51 AM
To: Santosh P K
Cc: peng.shaofu@zte.com.cn; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Hi Santosh
 
I think the issue is the first BFD packet = that has your Desc =3D0. Question is how to differentiate them when they ar= e from different ingress LSR.

Regards,
Shahram
 

On Jul 16, 2015, at 8:48 PM, Santosh P K <santos= hpk@juniper.net> wrote:<= /font>
Hello Deccan, MALLIK an= d Shahram,
     I w= ant to understand why do we need this? When BFD bootstrapping is completed = then we use local discr (BFD packet your discr) as a key which will be uniq= ue with in the local system. Please take a look at below section of RFC 5880.
 
https://tools.ietf.org/html/rfc5880#se= ction-6.3
 
We don=A1=AFt need to r= eally use any other fields as we would have exchanged the discr using LSP p= ing. I might have misunderstood your question and would like to be correcte= d.
 
 
Thanks
Santosh P K
 
From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@zte.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org; S. Davari
Subject: =B4=F0=B8=B4: Re: issues about draft-ietf-bfd-rfc5884-cl= arifications-02
 

Hi Mallik

Source address is also a good method. But it is better to form as standard.=

thanks




"MALLIK MUDIGONDA= (mmudigon)" <mmudigon@cisco.com= >

2015-07-16 =CF=C2=CE=E7 02:16
=CA=D5=BC=FE=C8=CB
 "S. Davari" <= ;davarish@yahoo.com>, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>
=B3=AD=CB=CD
"rtg-bfd@ietf.or= g" <rtg-bfd@ietf.org>
=D6=F7=CC=E2
Re: issues about draft-ietf-bfd-rfc5884= -clarifications-02

 







Hi,

I think the question is 2 different ingress LSRs using the same FEC, LSP, D= iscriminator values. Discriminator values can be the same for 2 different i= ngress LSRs and if the other values are same we can always use the Source a= ddress to differentiate. Am I missing something?

Regards
Mallik

From: "S. Davari" <davarish@yahoo.co= m>
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaofu@zte.com.cn= " <= peng.shaofu@zte.com.cn>=
Cc: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org= >
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD to each of those BFD sessions?<= br>
Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zt= e.com.cn" <= peng.shaofu@zte.com.cn> wrote:


hi authors

It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminato= r.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo= request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple <FEC, LSP> as defined in this draft, but egre= ss allocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan


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--_000_D1CEAC7D45AFmmudigonciscocom_-- From nobody Fri Jul 17 00:40:29 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9C65D1B3074 for ; Fri, 17 Jul 2015 00:40:27 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 duPdBWPw16wA for ; Fri, 17 Jul 2015 00:40:25 -0700 (PDT) Received: from rcdn-iport-6.cisco.com (rcdn-iport-6.cisco.com [173.37.86.77]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 81DC01B30C7 for ; Fri, 17 Jul 2015 00:40:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=14887; q=dns/txt; s=iport; t=1437118825; x=1438328425; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=y6KVcAU7xztEX0zk5UaexEspdf87PW4V+EfmxVmkXjM=; b=E6W+zHpsQGuYPj5tBlHQy0uh/hB2klFOODSs01zDUkrIzYEwbAESIgh0 B7XKIi3bO7uFpq3DDrF7QOGCyflkAdL8XaiQS5VidEEu7bw2afBA9jIRX vUkOQG5+d/nLhC+r12Ur6fAKUypHbGYt7A0dKu+2JI+G5j2Ih5qUqKK6I U=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0AsAwCgsKhV/4UNJK1agkZNVGkGrBuPOgmHbAKBRDgUAQEBAQEBAYEKhCMBAQEELUwQAgEIEQMBAQEoBx8TEwEJCAIEAQ0FiBkDEs9oAQEBAQEBAQEBAQEBAQEBAQEBAQEBF4tMgk2CDgcTEQYBBoQlAQSFYAyOYQEJijKBYZFchycmg3xvgUeBBAEBAQ X-IronPort-AV: E=Sophos; i="5.15,494,1432598400"; d="scan'208,217"; a="12500270" Received: from alln-core-11.cisco.com ([173.36.13.133]) by rcdn-iport-6.cisco.com with ESMTP; 17 Jul 2015 07:40:24 +0000 Received: from xhc-aln-x03.cisco.com (xhc-aln-x03.cisco.com [173.36.12.77]) by alln-core-11.cisco.com (8.14.5/8.14.5) with ESMTP id t6H7eOpt031344 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 17 Jul 2015 07:40:24 GMT Received: from xmb-rcd-x05.cisco.com ([169.254.15.132]) by xhc-aln-x03.cisco.com ([173.36.12.77]) with mapi id 14.03.0195.001; Fri, 17 Jul 2015 02:40:24 -0500 From: "MALLIK MUDIGONDA (mmudigon)" To: Gregory Mirsky , Santosh P K , "S. Davari" Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Topic: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Index: AQHQwEgWRYhetmnZMkyNRGuIJC/D+J3fa9wAgABijwD//8bAgIAAYS+AgAAAxAA= Date: Fri, 17 Jul 2015 07:40:23 +0000 Message-ID: References: <7CD7F2E3-88E5-4237-8FCC-BA95FAD7F281@yahoo.com> <7347100B5761DC41A166AC17F22DF11221860C27@eusaamb103.ericsson.se> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.143.25.169] Content-Type: multipart/alternative; boundary="_000_D1CEAEF545C3mmudigonciscocom_" MIME-Version: 1.0 Archived-At: Cc: "peng.shaofu@zte.com.cn" , "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 17 Jul 2015 07:40:27 -0000 --_000_D1CEAEF545C3mmudigonciscocom_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi truncated the message and resending with only the latest conversations Regards Mallik From: Mallik Mudigonda > Date: Friday, 17 July 2015 13:07 To: Gregory Mirsky >, Santosh P K = >, "S. Davari" > Cc: "peng.shaofu@zte.com.cn" >, "rtg-bfd@ietf.org" > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 Hi Greg, Precisely. Can be the same between LSP echo messages sent from 2= different ingresses? I am not sure of this. So there may not be a problem = with p2p even if 2 ingresses have the same FEC and Discriminator because th= e LSP must be different. I agree that two sessions from the same ingress m= ust use a different discriminator, so no issues. So in p2p cases either LSP= or discriminator will be different. Am I right? In the case of mp2p all of= these can be the same in which case source address differentiates. Does th= is make sense? Thanks Regards Mallik From: Gregory Mirsky > Date: Friday, 17 July 2015 12:49 To: Mallik Mudigonda >, Santo= sh P K >, "S. Davari" <= davarish@yahoo.com> Cc: "peng.shaofu@zte.com.cn" >, "rtg-bfd@ietf.org" > Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02 Hi Malik, I cannot see scenario when bootstrapping LSP Ping has the same source IP ad= dress and BFD Discriminator. Something must be different. Consider two node= s with ECMP =96 A and B. A bootstraps two FD sessions with two LSP Pings. T= rue, IP Source addresses are the same in both as well as FEC. But Discrimin= ators will be different as they must e unique within the same node. Right? = If the case of three nodes when two set BFD sessions to the same FEC on the= third and accidentally pick the same Discriminator, then IP source address= es must be different between them. Am I missing something? Regards, Greg From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of MALLIK MUDIGON= DA (mmudigon) Sent: Thursday, July 16, 2015 10:15 PM To: Santosh P K; S. Davari Cc: peng.shaofu@zte.com.cn; rtg-bfd@ietf.org= Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 Hi, The question is even with LSP ping, how to de-mutiplex if all the parameter= s are the same. That=92s where the source address comes into picture. Thanks Regards Mallik --_000_D1CEAEF545C3mmudigonciscocom_ Content-Type: text/html; charset="Windows-1252" Content-ID: <47D9C86A3B8D8340BB80B6B3A59C9AB1@emea.cisco.com> Content-Transfer-Encoding: quoted-printable
Hi truncated the message and resending with only the latest conversati= ons

Regards
Mallik

From: Mallik Mudigonda <mmudigon@cisco.com>
Date: Friday, 17 July 2015 13:07 To: Gregory Mirsky <gregory.mirsky@ericsson.com>, San= tosh P K <santoshpk@juniper.net= >, "S. Davari" <d= avarish@yahoo.com>
Cc: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: issues about draft-iet= f-bfd-rfc5884-clarifications-02

Hi Greg,

Precisely. Can <FEC, LSP> be the same between LSP echo messages = sent from 2 different ingresses? I am not sure of this. So there may not be= a problem with p2p even if 2 ingresses have the same FEC and Discriminator= because the LSP must be different.  I agree that two sessions from the same ingress must use a different discrim= inator, so no issues. So in p2p cases either LSP or discriminator will be d= ifferent. Am I right? In the case of mp2p all of these can be the same in w= hich case source address differentiates. Does this make sense?

Thanks

Regards
Mallik 

From: Gregory Mirsky <gregory.mirsky@ericsson.com> Date: Friday, 17 July 2015 12:49 To: Mallik Mudigonda <mmudigon@cisco.com>, Santosh P K <santoshpk@juniper.net>, "= S. Davari" <davarish@yahoo.co= m>
Cc: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: issues about draft-iet= f-bfd-rfc5884-clarifications-02

Hi  Malik,

I cannot see scenario when bootstra= pping LSP Ping has the same source IP address and BFD Discriminator. Someth= ing must be different. Consider two nodes with ECMP =96 A and B. A bootstraps two FD sessions with two LSP Pin= gs. True, IP Source addresses are the same in both as well as FEC. But Disc= riminators will be different as they must e unique within the same node. Ri= ght? If the case of three nodes when two set BFD sessions to the same FEC on the third and accidentally pick th= e same Discriminator, then IP source addresses must be different between th= em. Am I missing something?

 

      = ;          Regards,=

      = ;            &n= bsp;            = ; Greg

 

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of MALLIK MUDIGONDA (mmudigon)
Sent: Thursday, July 16, 2015 10:15 PM
To: Santosh P K; S. Davari
Cc: peng.shaofu@zte.com.cn= ; rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

 

Hi,

 

The question is even with LSP ping, how to d= e-mutiplex if all the parameters are the same. That=92s where the source ad= dress comes into picture. 

 

Thanks

 

Regards

Mallik

 

 --_000_D1CEAEF545C3mmudigonciscocom_-- From nobody Fri Jul 17 18:16:48 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 421CD1B2AC9 for ; Thu, 16 Jul 2015 21:21:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.708 X-Spam-Level: X-Spam-Status: No, score=-2.708 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, MIME_QP_LONG_LINE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham 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 6cJKeDxiJ7wM for ; Thu, 16 Jul 2015 21:21:19 -0700 (PDT) Received: from nm38-vm1.bullet.mail.bf1.yahoo.com (nm38-vm1.bullet.mail.bf1.yahoo.com [72.30.239.17]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E6C2A1B2AC8 for ; Thu, 16 Jul 2015 21:21:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1437106878; bh=qjyeKjWFc3vNjZkp0azK5gWOQuSl7MH5XtXVPHjbcDc=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From:Subject; b=A1lV1R5JCBAfqPjLR4xooIrlLR0Sm0kVj+89J4y/gnCJxP4Zua4bbVgdkUdJx9QiKcjHdZHswb9Deq3GBqyRsmM56VJWFFIauHM6HGmw+VfQCOzd6+WlCODlKV7B66INvcD5Sisk5OLeYUH1iMP2D5wUHWcGgKAWJ7NToToSjvYkJdyo+UhpRwtdFLbh/6Fa0UewsVwy7+lHXt9G32PjsMsCP89bInwNcfgTbh+nJgsFJQ/3VBe1xvYcamiqVSlLgRepPvqwrLw6yOsai9LN6QJ0m38WO3rL6GhgKYm9GlFdEIqHY2PJ+2P1KF7Wfd4v3pM8IWSOk5P4sH84LrnNjA== Received: from [98.139.215.142] by nm38.bullet.mail.bf1.yahoo.com with NNFMP; 17 Jul 2015 04:21:18 -0000 Received: from [98.139.211.195] by tm13.bullet.mail.bf1.yahoo.com with NNFMP; 17 Jul 2015 04:21:18 -0000 Received: from [127.0.0.1] by smtp204.mail.bf1.yahoo.com with NNFMP; 17 Jul 2015 04:21:17 -0000 X-Yahoo-Newman-Id: 996762.5985.bm@smtp204.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: waW_L8YVM1m7m6WTiaAIUyI4DifmZnqe7YB8_e7Zfbl5x8o 1dkzqE53pFwEESO.0z_me8tJx1rVn4Sltt9c9hOuXZIxPs.0U66zdS0.QExi E20aWUxMzLtYsQJjOzaPX8wOblLI5l51dHSU0ft08HpqyeGtbsC0F79Tdie9 bp9VebcFoy3yq9Y7cevCYnRbfszzr.Te1GlnivPV1GRz8Rrot0ORAu0PJ8mu lTGkFqFTlcDfMyO1rOpnXIOdISUBgn3k_T7rfvwwo1X3_RnDaA6TBE4Gk9_Q BZJlhVIMaSEN2_HvlcCe3WnpdETW4JdzMR3W9XQyG_S9GG8Ip3eBLRvelQ0m .PyEAgrbHujiZVXysay8YIdHXeY.op.miyjsFEoHCm2Q5k.PkA2eNOKGd1xT SjLQEwm_l79up9T5yqNw77HxvuGS7Nl0Hznz0lLM0yylVckArjm8OvXjQbc6 7H6WOlOBxMV.JK82cHGyVezmIwE2Urlq5js_jObB15CzuXeClRuFW92zLvPK RE_akVQzoYlJp0dioM.4NXgLfLFePQpi. X-Yahoo-SMTP: ygPrP9CswBCWPbPtKJlJyLY0KMlg Content-Type: multipart/alternative; boundary=Apple-Mail-90597572-0758-4E3D-8C71-D0AC76E0B676 Mime-Version: 1.0 (1.0) Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 From: "S. Davari" X-Mailer: iPhone Mail (12B440) In-Reply-To: Date: Thu, 16 Jul 2015 21:21:15 -0700 Content-Transfer-Encoding: 7bit Message-Id: <7CD7F2E3-88E5-4237-8FCC-BA95FAD7F281@yahoo.com> References: To: Santosh P K Archived-At: X-Mailman-Approved-At: Fri, 17 Jul 2015 18:16:45 -0700 Cc: "peng.shaofu@zte.com.cn" , "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 17 Jul 2015 04:21:22 -0000 --Apple-Mail-90597572-0758-4E3D-8C71-D0AC76E0B676 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Santosh I think the issue is the first BFD packet that has your Desc =3D0. Question i= s how to differentiate them when they are from different ingress LSR. Regards, Shahram > On Jul 16, 2015, at 8:48 PM, Santosh P K wrote: >=20 > Hello Deccan, MALLIK and Shahram, > I want to understand why do we need this? When BFD bootstrapping is c= ompleted then we use local discr (BFD packet your discr) as a key which will= be unique with in the local system. Please take a look at below section of R= FC 5880. > =20 > https://tools.ietf.org/html/rfc5880#section-6.3 > =20 > We don=E2=80=99t need to really use any other fields as we would have exch= anged the discr using LSP ping. I might have misunderstood your question and= would like to be corrected. > =20 > =20 > Thanks > Santosh P K > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@z= te.com.cn > Sent: Thursday, July 16, 2015 1:00 PM > To: MALLIK MUDIGONDA (mmudigon) > Cc: rtg-bfd@ietf.org; S. Davari > Subject: =E7=AD=94=E5=A4=8D: Re: issues about draft-ietf-bfd-rfc5884-clari= fications-02 > =20 >=20 > Hi Mallik=20 >=20 > Source address is also a good method. But it is better to form as standard= .=20 >=20 > thanks=20 >=20 >=20 >=20 >=20 > "MALLIK MUDIGONDA (mmudigon)" > 2015-07-16 =E4=B8=8B=E5=8D=88 02:16=20 >=20 > =E6=94=B6=E4=BB=B6=E4=BA=BA > "S. Davari" , "peng.shaofu@zte.com.cn" > =E6=8A=84=E9=80=81 > "rtg-bfd@ietf.org" > =E4=B8=BB=E9=A2=98 > Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 > =20 >=20 >=20 >=20 > Hi,=20 >=20 > I think the question is 2 different ingress LSRs using the same FEC, LSP, D= iscriminator values. Discriminator values can be the same for 2 different in= gress LSRs and if the other values are same we can always use the Source add= ress to differentiate. Am I missing something?=20 >=20 > Regards=20 > Mallik=20 >=20 > From: "S. Davari" > Date: Wednesday, 15 July 2015 20:12 > To: "peng.shaofu@zte.com.cn" > Cc: "rtg-bfd@ietf.org" > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 >=20 > Hi=20 >=20 > Why can't the ingress allocate different LD to each of those BFD sessions?= >=20 > Regards,=20 > Shahram=20 >=20 >=20 > On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" wrote: >=20 >=20 > hi authors=20 >=20 > It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminator= . > I think it is very useful to introduce a BFD Initiator TLV to LSP ping ech= o request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple as defined in this draft, but egress allo= cate LD based on tuple .=20 >=20 > thanks=20 > deccan=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 >=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 >=20 >=20 > =20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= > =20 > =20 --Apple-Mail-90597572-0758-4E3D-8C71-D0AC76E0B676 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Santosh

I t= hink the issue is the first BFD packet that has your Desc =3D0. Question is h= ow to differentiate them when they are from different ingress LSR.

Regards,
Shahram


On Jul 16, 2015= , at 8:48 PM, Santosh P K <santo= shpk@juniper.net> wrote:

=

Hello Deccan= , MALLIK and Shahram,

  =    I want to understand why do we need this? When BFD bootstr= apping is completed then we use local discr (BFD packet your discr) as a key which will be unique with in the local system. Please take a look a= t below section of RFC 5880.

 <= /o:p>

https://tools.ietf.org/html/= rfc5880#section-6.3

 <= /o:p>

We don=E2=80= =99t need to really use any other fields as we would have exchanged the disc= r using LSP ping. I might have misunderstood your question and would like to be corrected.

 <= /o:p>

 <= /o:p>

Thanks<= /o:p>

Santosh P K

 <= /o:p>

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@zt= e.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org; S. Dava= ri
Subject: =E7=AD= =94=E5=A4=8D: Re: issues about draft-ietf-bfd-rfc5884-clarifications-= 02

 


Hi= Mallik

So= urce address is also a good method. But it is better to form as standard.

th= anks



"MALLIK MUDIGONDA (mmudigon)" <mmudigon@cisco.com>

= 2015-07-16 =E4=B8=8B=E5=8D=88 02:16<= /span>

=E6=94=B6=E4=BB=B6=E4=BA=BA=

"S. Davari" <da= varish@yahoo.com>, "peng.sh= aofu@zte.com.cn" <peng.shao= fu@zte.com.cn>

=E6=8A=84=E9=80=81

"rtg-bfd@ietf.org" <rtg-bfd@ietf.org>

=E4=B8=BB=E9=A2=98

Re: issues about draft-ietf-bfd-rfc5884-clarifications-0= 2

 




= Hi,

= I think the question is 2 different ingress LSRs using the same FEC, LSP, Di= scriminator values. Discriminator values can be the same for 2 different ing= ress LSRs and if the other values are same we can always use the Source address to differentiate. Am I missing somethi= ng?

= Regards
= Mallik

From: "S. Davari" <davarish@yahoo.com>
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaofu@zte.co= m.cn" <peng.sh= aofu@zte.com.cn>
Cc: "rtg-bfd@ietf.org<= /a>" <rtg-bfd@ietf.org<= /a>>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

= Hi

= Why can't the ingress allocate different LD to each of those BFD sessions?
Regards,
= Shahram

=
On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:

hi authors

It is neccessary to address the case that different ingress LSR establish BFD= session with the same egress LSR, with same FEC, same local descriminator.<= br> I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo r= equest message, to distinguish different ingress LSR. So that ingress alloca= te LD based on tuple <FEC, LSP> as defined in this draft, but egress a= llocate LD based on tuple <Initiator, FEC, RD>.

thanks deccan


--------------------------------------------------------
ZTE Information Security Notice: The information contained in this mail (and= any attachment transmitted herewith) is privileged and confidential and is i= ntended for the exclusive use of the addressee(s).  If you are not an i= ntended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information= contained is strictly prohibited.  If you have received this mail in e= rror, please delete it and notify us immediately.


=


--------------------------------------------------------
ZTE Information Security Notice: The information contained in this mail (and= any attachment transmitted herewith) is privileged and confidential and is i= ntended for the exclusive use of the addressee(s).  If you are not an i= ntended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information= contained is strictly prohibited.  If you have received this mail in e= rror, please delete it and notify us immediately.



 
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= --Apple-Mail-90597572-0758-4E3D-8C71-D0AC76E0B676-- From nobody Fri Jul 17 18:16:49 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E0D301B3032 for ; Fri, 17 Jul 2015 00:06:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -98.26 X-Spam-Level: X-Spam-Status: No, score=-98.26 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, CHARSET_FARAWAY_HEADER=3.2, HTML_MESSAGE=0.001, MIME_8BIT_HEADER=0.3, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham 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 YZbM5J0yUoJA for ; Fri, 17 Jul 2015 00:06:05 -0700 (PDT) Received: from mx5.zte.com.cn (mx5.zte.com.cn [63.217.80.70]) by ietfa.amsl.com (Postfix) with ESMTP id 3F3BF1B3061 for ; Fri, 17 Jul 2015 00:04:05 -0700 (PDT) Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Websense Email Security Gateway with ESMTPS id 159CA876AA226; Fri, 17 Jul 2015 15:04:01 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id t6H73r39024414; Fri, 17 Jul 2015 15:03:54 +0800 (GMT-8) (envelope-from peng.shaofu@zte.com.cn) In-Reply-To: To: Santosh P K Subject: =?GB2312?B?tPC4tDogUkU6IGlzc3VlcyBhYm91dCBkcmFmdC1pZXRmLWJmZC1yZmM1ODg0?= =?GB2312?B?LWNsYXJpZmljYXRpb25zLTAy?= MIME-Version: 1.0 X-Mailer: Lotus Notes Release 6.5.6 March 06, 2007 Message-ID: From: peng.shaofu@zte.com.cn Date: Fri, 17 Jul 2015 15:03:47 +0800 X-MIMETrack: Serialize by Router on notes_smtp/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2015-07-17 15:03:54, Serialize complete at 2015-07-17 15:03:54 Content-Type: multipart/alternative; boundary="=_alternative 0026CF7848257E85_=" X-MAIL: mse01.zte.com.cn t6H73r39024414 Archived-At: X-Mailman-Approved-At: Fri, 17 Jul 2015 18:16:45 -0700 Cc: "rtg-bfd@ietf.org" , "S. 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-0000 Received: from [127.0.0.1] by smtp211.mail.bf1.yahoo.com with NNFMP; 17 Jul 2015 07:15:05 -0000 X-Yahoo-Newman-Id: 911280.26424.bm@smtp211.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: YAXX5XMVM1k.nUeb9JnmvcQl.JYnFoIlcfXGBl1zJ2a_lbo K3bzbZBRhbLcuZ0tvkk0oVzgXZcUT3apRSyvOFefwyntYeveneoBASWneNRw Bz83MnJmZ7UDH6239enVnABXPHUjfD30QfPiPOHu82Jw.RnRa7yK6s1s8JKQ gVREChzt87Ewmy_k1K3pTmymUmZobS26IUuPDEcIou.roDPAxDOSjblfRW.E ZLUf8NMXR49PsUdVJ37hPWccvhkVFU5zzo_FfN1kNNz.5ub1A9i5s9k_tdLi .Vv.hS66n_8GQCdbn1PlRpN25OleWU1hVQvpWKmKGcjjoOHCufVWKV1Eqz0W AnWnf6hRDM8mWnsZy.e7VUPqfRUEYkFdkcHJyYNn6xRA9.xAXsskp8lSjfYR EewfOUnJir4P6tFGDttcSRpYr41_BVKUYpwlkx1a6SKZ7DJrydkvbVbHxRsP BBBrKJw6XfvwWTlZfztz9Wz0zBAh7TXKNhIy2d23YVpdmyN1kLAERe9ixOVX pwnZ_MywbhjHlkXCrIE_ZomAKE6qKw9MM X-Yahoo-SMTP: ygPrP9CswBCWPbPtKJlJyLY0KMlg Content-Type: multipart/alternative; boundary=Apple-Mail-6143438D-2E36-4610-963E-E00F0D2FBFCC Mime-Version: 1.0 (1.0) Subject: =?utf-8?Q?Re:_=E7=AD=94=E5=A4=8D:_RE:_issues_about_draft-ietf-bf?= =?utf-8?Q?d-rfc5884-clarifications-02?= From: "S. Davari" X-Mailer: iPhone Mail (12B440) In-Reply-To: Date: Fri, 17 Jul 2015 00:15:03 -0700 Content-Transfer-Encoding: 7bit Message-Id: <2DD8A28E-A2FA-41B5-8F9A-09F9217ED7CC@yahoo.com> References: To: "peng.shaofu@zte.com.cn" Archived-At: X-Mailman-Approved-At: Fri, 17 Jul 2015 18:16:45 -0700 Cc: "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 17 Jul 2015 07:15:10 -0000 --Apple-Mail-6143438D-2E36-4610-963E-E00F0D2FBFCC Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Peng I think you are assuming mp2p LSP. Since for P2P=20 LSP we won't have this problem. Right? Regards, Shahram > On Jul 17, 2015, at 12:03 AM, peng.shaofu@zte.com.cn wrote: >=20 >=20 > Hi Santosh=20 >=20 > For example, there are two diferrent ingress (LSR1 & LSR2) want to establi= sh BFD session with the same egress (LSR3) for same FEC (3.3.3.9/32). PLease= see the following steps.=20 >=20 > step1: LSR1 construct an LSP echo request message, including LSR1-LD (100)= and FEC (3.3.3.9/32)=20 > step2: LSR3 received the echo request message, if FEC validation check suc= ceed, it will NEW a BFD entity, allocate LSR3-LD (200) based on tuple .=20 > Now LSR3 can send a BFD control packet with MD=3D200 YD=3D100.=20 > step3: LSR2 also construct an LSP echo request message, including LSR2-LD (= 100) and FEC (3.3.3.9/32)=20 > step4: LSR3 received the echo request message, if FEC validation check suc= ceed, it will match to the above already existing BFD session, because tuple= equal =20 >=20 > thanks=20 > Deccan=20 >=20 >=20 >=20 > Santosh P K =20 > 2015-07-17 =E4=B8=8B=E5=8D=88 01:27 >=20 > =E6=94=B6=E4=BB=B6=E4=BA=BA > "MALLIK MUDIGONDA (mmudigon)" , "S. Davari" > =E6=8A=84=E9=80=81 > "peng.shaofu@zte.com.cn" , "rtg-bfd@ietf.org" > =E4=B8=BB=E9=A2=98 > RE: issues about draft-ietf-bfd-rfc5884-clarifications-02 >=20 >=20 >=20 >=20 >=20 > Mallik,=20 > When a BFD packet is received with your_disc as non-zero then we use on= ly that as demux entity. Your_discr is a value allocated by local router and= should be unique across the system. So where is the question of having any o= ther field to be used as demux? Are you talking about same discr for BFD ses= sion for same LSP in case of ECMP? Can you please explain more in detail wha= t is the scenario? I might have missed some basic thing here.=20 > =20 > =20 > Thanks=20 > Santosh P K=20 > =20 > From: MALLIK MUDIGONDA (mmudigon) [mailto:mmudigon@cisco.com]=20 > Sent: Friday, July 17, 2015 10:45 AM > To: Santosh P K; S. Davari > Cc: peng.shaofu@zte.com.cn; rtg-bfd@ietf.org > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 > =20 > Hi,=20 > =20 > The question is even with LSP ping, how to de-mutiplex if all the paramete= rs are the same. That=E2=80=99s where the source address comes into picture.= =20 > =20 > Thanks=20 > =20 > Regards=20 > Mallik=20 > =20 > From: Santosh P K > Date: Friday, 17 July 2015 10:21 > To: "S. Davari" > Cc: "peng.shaofu@zte.com.cn" , Mallik Mudigonda , "rtg-bfd@ietf.org" > Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 > =20 > Sharam,=20 > True but here it is 5884 and for 5884 (MPLS BFD) we do bootstrapping us= ing LSP ping and that exchange discr right? So you should ideally not receiv= e any BFD packet with your_disc =3D 0.=20 > =20 > Thanks=20 > Santosh P K=20 > =20 > From: S. Davari [mailto:davarish@yahoo.com]=20 > Sent: Friday, July 17, 2015 9:51 AM > To: Santosh P K > Cc: peng.shaofu@zte.com.cn; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 > =20 > Hi Santosh=20 > =20 > I think the issue is the first BFD packet that has your Desc =3D0. Questio= n is how to differentiate them when they are from different ingress LSR.=20 >=20 > Regards,=20 > Shahram=20 > =20 >=20 > On Jul 16, 2015, at 8:48 PM, Santosh P K wrote:=20= > Hello Deccan, MALLIK and Shahram,=20 > I want to understand why do we need this? When BFD bootstrapping is c= ompleted then we use local discr (BFD packet your discr) as a key which will= be unique with in the local system. Please take a look at below section of R= FC 5880.=20 > =20 > https://tools.ietf.org/html/rfc5880#section-6.3=20 > =20 > We don=E2=80=99t need to really use any other fields as we would have exch= anged the discr using LSP ping. I might have misunderstood your question and= would like to be corrected.=20 > =20 > =20 > Thanks=20 > Santosh P K=20 > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@z= te.com.cn > Sent: Thursday, July 16, 2015 1:00 PM > To: MALLIK MUDIGONDA (mmudigon) > Cc: rtg-bfd@ietf.org; S. Davari > Subject: =E7=AD=94=E5=A4=8D: Re: issues about draft-ietf-bfd-rfc5884-clari= fications-02=20 > =20 >=20 > Hi Mallik=20 >=20 > Source address is also a good method. But it is better to form as standard= . >=20 > thanks=20 >=20 >=20 >=20 >=20 > "MALLIK MUDIGONDA (mmudigon)" > 2015-07-16 =E4=B8=8B=E5=8D=88 02:16=20 >=20 >=20 > =E6=94=B6=E4=BB=B6=E4=BA=BA > "S. Davari" , "peng.shaofu@zte.com.cn" > =E6=8A=84=E9=80=81 > "rtg-bfd@ietf.org" > =E4=B8=BB=E9=A2=98 > Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 >=20 > =20 >=20 >=20 >=20 >=20 >=20 >=20 > Hi,=20 >=20 > I think the question is 2 different ingress LSRs using the same FEC, LSP, D= iscriminator values. Discriminator values can be the same for 2 different in= gress LSRs and if the other values are same we can always use the Source add= ress to differentiate. Am I missing something? >=20 > Regards=20 > Mallik=20 >=20 > From: "S. Davari" > Date: Wednesday, 15 July 2015 20:12 > To: "peng.shaofu@zte.com.cn" > Cc: "rtg-bfd@ietf.org" > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 >=20 > Hi=20 >=20 > Why can't the ingress allocate different LD to each of those BFD sessions?= >=20 > Regards,=20 > Shahram=20 >=20 >=20 > On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" wrote: >=20 >=20 > hi authors >=20 > It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminator= . > I think it is very useful to introduce a BFD Initiator TLV to LSP ping ech= o request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple as defined in this draft, but egress allo= cate LD based on tuple . >=20 > thanks=20 > deccan=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 >=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 >=20 >=20 >=20 > =20 > --------------------------------------------------------=20 > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= =20 > =20 > =20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 --Apple-Mail-6143438D-2E36-4610-963E-E00F0D2FBFCC Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Peng

I think y= ou are assuming mp2p LSP. Since for P2P 
LSP we won't have th= is problem. Right?

Regards,
Shahram


On Jul 17, 2015, at 12:03 AM, peng.shaofu@zte.com.cn wrote:


Hi Santosh

For example, there are two diferren= t ingress (LSR1 & LSR2) want to establish BFD session with the same egress= (LSR3) for same FEC (3.3.3.9/32). PLease see the following steps.

step1: LSR1 construct an LSP echo r= equest message, including LSR1-LD (100) and FEC (3.3.3.9/32)
step2: LSR3 received the echo reque= st message, if FEC validation check succeed, it will NEW a BFD entity, allocate= LSR3-LD (200) based on tuple <FEC, LSR1-LD>.
       Now LSR3= can send a BFD control packet with MD=3D200 YD=3D100.
step3: LSR2 also construct an LSP e= cho request message, including LSR2-LD (100) and FEC (3.3.3.9/32)
step4: LSR3 received the echo reque= st message, if FEC validation check succeed, it will match to the above already= existing BFD session, because tuple <FEC, LSR2-LD> equal <FEC, LSR1-LD>

thanks
Deccan



Santosh P K <santoshpk@juniper.net>

2015-07-17 =E4=B8=8B=E5=8D=88 01:27<= /font>

=E6=94=B6=E4=BB=B6= =E4=BA=BA
"MALLIK MUDIGONDA (mmudigon)" <mmudigon@cisco.com>, "S. Da= vari" <davarish@yahoo.com>
=E6=8A=84=E9=80=81=
"peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
=E4=B8=BB=E9=A2=98=
RE: issues about draft-ietf-bf= d-rfc5884-clarifications-02





Mallik,
   When a B= FD packet is received with your_disc as non-zero then we use only that as demux entity= . Your_discr is a value allocated by local router and should be unique across the system. So where is the question of having any other field to be used as demux? Are you talking about same discr for BFD session for same LSP in case of ECMP? Can you please explain more in detail what is the scenario?= I might have missed some basic thing here.
 
 
Thanks
Santosh P K
 
From: MALLIK MUDIGONDA (mmudigo= n) [mailto:mmudigon@cisco.com] Sent: Friday, July 17, 2015 10:45 AM
To: Santosh P K; S. Davari
Cc: peng.shaofu@zte.com.cn= ; rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Hi,
 
The question is even with LSP ping, ho= w to de-mutiplex if all the parameters are the same. That=E2=80=99s where the s= ource address comes into picture.
 
Thanks
 
Regards
Mallik
 
From: Santosh P K <santoshpk@juniper.net>
Date: Friday, 17 July 2015 10:21
To: "S. Davari" <davarish@yahoo.com>
Cc: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>, Mallik Mudigonda <mmudigon@cisco.com<= font size=3D"2" face=3D"Calibri">>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Sharam,
   True bu= t here it is 5884 and for 5884 (MPLS BFD) we do bootstrapping using LSP ping and that exchange discr right? So you should ideally not receive any BFD packet with your_disc =3D 0.
 
Thanks
Santosh P K
 
From: S. Davari [mailto:davarish@yahoo.com]
Sent: Friday, July 17, 2015 9:51 AM
To: Santosh P K
Cc: peng.shaofu@zte.com.cn; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org<= /a>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Hi Santosh
 
I think the issue is the first BFD pack= et that has your Desc =3D0. Question is how to differentiate them when they are from different ingress LSR.

Regards,
Shahram
 

On Jul 16, 2015, at 8:48 PM, Santosh P K <santoshp= k@juniper.net> wrote:
Hello Deccan, MALLIK= and Shahram,
     = I want to understand why do we need this? When BFD bootstrapping is completed then we use local discr (BFD packet your discr) as a key which will be unique with in the local system. Please take a look at below section of RFC 5880.
 
https://tools.ietf.org/html/rfc5880#s= ection-6.3
 
We don=E2=80=99t nee= d to really use any other fields as we would have exchanged the discr using LSP ping. I might have misunderstood your question and would like to be corrected.
 
 
Thanks
Santosh P K
 
From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@zte.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org; S. Davari
Subject: =E7=AD=94=E5=A4=8D: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 

Hi Mallik

Source address is also a good method. But it is better to form as standard.<= /font>

thanks




"MALLIK MUDIGONDA (mmud= igon)" <mmudigon@cisco.com>

2015-07-16 =E4=B8=8B=E5=8D=88 02:16


=E6=94=B6=E4=BB=B6=E4=BA= =BA
"S. Davari" <davarish@yahoo.com>, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>
=E6=8A=84=E9=80=81
"rtg-bfd@ietf.org<= /u>" <rtg-bfd@ietf.org>
=E4=B8=BB=E9=A2=98
Re: issues about draft-ietf-bfd-rfc= 5884-clarifications-02

 







Hi,

I think the question is 2 different ingress LSRs using the same FEC, LSP, Discriminator values. Discriminator values can be the same for 2 different ingress LSRs and if the other values are same we can always use the Source address to differentiate. Am I missing something?

Regards
Mallik

From: "S. Davari" <davarish@yahoo.com= >
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn>
Cc: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD to each of those BFD sessions?
Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.c= n" <peng.shaofu@zte.com.cn> wrote:


hi authors

It is neccessary to address the case that different ingress LSR establish BFD session with the same egress LSR, with same FEC, same local descriminato= r.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo request message, to distinguish different ingress LSR. So that ingress allocate LD based on tuple <FEC, LSP> as defined in this draft, but egress allocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan


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------------------------= --------------------------------
ZTE Information Security= Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s).  If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited.  If you have received= this mail in error, please delete it and notify us immediately.
 
  


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Hmm ok so = this question is during bootstrapping time when LSP ping echo packet is rec= eived with BFD discriminator TLV not when BFD packet is received. In that case source IP address can be used.

 = ;

 = ;

Thanks

Santosh P = K

 = ;

From: peng.shaofu@zte.com.cn [mailto= :peng.shaofu@zte.com.cn]
Sent: Friday, July 17, 2015 12:34 PM
To: Santosh P K
Cc: S. Davari; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org
Subject: =B4= =F0=B8=B4: RE: issues about draft-ietf-bfd-rfc5884-clarifications-0= 2

 


H= i Santosh

F= or example, there are two diferrent ingress (LSR1 & LSR2) want to estab= lish BFD session with the same egress (LSR3) for same FEC (3.3.3.9/32). PLe= ase see the following steps.

s= tep1: LSR1 construct an LSP echo request message, including LSR1-LD (100) a= nd FEC (3.3.3.9/32)
s= tep2: LSR3 received the echo request message, if FEC validation check succe= ed, it will NEW a BFD entity, allocate LSR3-LD (200) based on tuple <FEC= , LSR1-LD>.
&= nbsp;      Now LSR3 can send a BFD control packet with MD=3D= 200 YD=3D100.
s= tep3: LSR2 also construct an LSP echo request message, including LSR2-LD (1= 00) and FEC (3.3.3.9/32)
s= tep4: LSR3 received the echo request message, if FEC validation check succe= ed, it will match to the above already existing BFD session, because tuple = <FEC, LSR2-LD> equal <FEC, LSR1-LD>

t= hanks
D= eccan


Santosh P K <santoshpk@juniper.net>

2015-07-17 =CF=C2=CE=E7 01:27

=CA=D5=BC=FE=C8=CB<= /p>

"MALLIK MUDIGONDA (mmudigon)" <mmudigon@cisco.com>, "S. Davari&quo= t; <davarish@yahoo.com>

=B3=AD=CB=CD

"peng.s= haofu@zte.com.cn" <pe= ng.shaofu@zte.com.cn>, "rtg= -bfd@ietf.org" <rtg-bfd@ietf.org>

=D6=F7=CC=E2

RE: issues about draft-ietf-bfd-rfc5884-clarifications= -02

 




Mallik,
   When a BFD packet is received with your_disc as= non-zero then we use only that as demux entity. Your_discr is a value allo= cated by local router and should be unique across the system. So where is the question of having any other field to be used as d= emux? Are you talking about same discr for BFD session for same LSP in case= of ECMP? Can you please explain more in detail what is the scenario? I mig= ht have missed some basic thing here.
 
 
Thanks
Santosh P K
 
From: MALLIK MUDIGONDA (mmudigon) [mailto:mmudigon@cisco.com]
Sent: Friday, July 17, 2015 10:45 AM
To: Santosh P K; S. Davari
Cc: peng.shaofu@zte.com.cn; rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Hi,
 
The question is even with LSP ping, how to de-mutiplex if all the paramete= rs are the same. That=A1=AFs where the source address comes into picture.
 
Thanks
 
Regards
Mallik
 
From: Santosh P K <santoshpk@juniper.net>
Date: Friday, 17 July 2015 10:21
To: "S. Davari" <davarish@yahoo.com>
Cc: "peng.shaof= u@zte.com.cn" <peng.shaofu@zte.com.cn>, Mallik Mudigonda <mmudigo= n@cisco.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Sharam,
   True but here it is 5884 and for 5884 (MPLS BFD= ) we do bootstrapping using LSP ping and that exchange discr right? So you = should ideally not receive any BFD packet with your_disc =3D 0.
 
Thanks
Santosh P K
 
From: S. Davari [mailto:davarish@yahoo.com]
Sent: Friday, July 17, 2015 9:51 AM
To: Santosh P K
Cc: peng.shaofu@zte.c= om.cn; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org<= span style=3D"font-size:10.0pt;font-family:"Calibri",sans-serif">=
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications= -02
 
Hi Santosh
 
I think the issue is the first BFD packet that has your Desc =3D0. Question= is how to differentiate them when they are from different ingress LSR.

Regards,
Shahram
 

On Jul 16, 2015, at 8:48 PM, Santosh P K <santoshpk@juniper.net> wrote:
Hello Deccan, MALLIK and Shahram,
     I want to understand why do we need this= ? When BFD bootstrapping is completed then we use local discr (BFD packet y= our discr) as a key which will be unique with in the local system. Please take a look at below section of RFC 5880.
 
https://tools.= ietf.org/html/rfc5880#section-6.3
 
We don=A1=AFt need to really use any other fields as we woul= d have exchanged the discr using LSP ping. I might have misunderstood your = question and would like to be corrected.
 
 
Thanks
Santosh P K
 
From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.= shaofu@zte.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.org= ; S. Davari
Subject: =B4=F0= =B8=B4: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
<= br> Hi Mallik
<= br> Source address is also a good method. But it is better to form as standard.=
<= br> thanks



"MALLIK MUDIGONDA (mmudigon)" <= mmudigon@cisco.com>

2015-07-16 =CF=C2=CE=E7 02:16

 

=CA=D5=BC=FE=C8=CB<= /p>

"S. Davari" <davarish@yahoo.com>, "peng.shaofu@zte.com.c= n" <peng.sh= aofu@zte.com.cn>

=B3=AD=CB=CD

"rtg-bfd= @ietf.org" <rtg-bfd@ietf.org>=

=D6=F7=CC=E2

Re: issues about draft-ietf-bfd-rfc5884-clarifications= -02


 

 





Hi,

I think the question is 2 different ingress LSRs using the same FEC, LSP, D= iscriminator values. Discriminator values can be the same for 2 different i= ngress LSRs and if the other values are same we can always use the Source a= ddress to differentiate. Am I missing something?

Regards
Mallik

From: "S. Davari" <davarish@yahoo.com>
Date: Wednesday, 15 July 2015 20:12
To: "peng.shaof= u@zte.com.cn" <peng.shaofu@zte.com.cn>
Cc: "rtg-bfd@ietf.org<= /span>" <rtg-bfd@i= etf.org>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD to each of those BFD sessions?<= br>
Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:
<= br>
hi authors

It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminato= r.
I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo= request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple <FEC, LSP> as defined in this draft, but egre= ss allocate LD based on tuple <Initiator, FEC, RD>.

thanks <= br> deccan


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--_000_SN1PR0501MB1760B9DC6765DD5D11FF35F3B3980SN1PR0501MB1760_-- From nobody Fri Jul 17 18:25:26 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 58CA11A039F for ; Fri, 17 Jul 2015 18:25:22 -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, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=ham 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 TAm0ofN6zv8V for ; Fri, 17 Jul 2015 18:25:19 -0700 (PDT) Received: from mail-lb0-x231.google.com (mail-lb0-x231.google.com [IPv6:2a00:1450:4010:c04::231]) (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 5F4C21A0363 for ; Fri, 17 Jul 2015 18:25:18 -0700 (PDT) Received: by lblf12 with SMTP id f12so69470844lbl.2 for ; Fri, 17 Jul 2015 18:25:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=MxqraNJ111r5tao4xAvMpwATrLFMRJN5cfLC00+ZJbo=; b=QaxETJgF1U6Nv70+8VsquRZmX+3rKluUFt4HW8LFP54WaQGDxdmuXWurNYZ4RXYaxS kI9gf0HAOwNEA2Duuqek3Wn69ZnUBe9jk1Tec8DFeDvcNNLmoratG4uO8MoRlLyQgW2g 2dhsiRCLwaJBGtZ1vvabceMkCknmhu2yQPGWtD5ygOXlc9ije6ETKTyVrH2z/znIvMmO 3YHLTETu5kVaqru6hOUUeCeWHHfhjEZqtXgJl/gh2lNAMlTXkbYhlyFy/aC+0GAC4qop hTHFBpIIE+8GF9MWfdFIbLaJX3nR976aZcpGiwW0B91wOyAlnaup5Fuqb28a9WDLEHVc ebAQ== MIME-Version: 1.0 X-Received: by 10.112.141.8 with SMTP id rk8mr16610001lbb.87.1437182716784; Fri, 17 Jul 2015 18:25:16 -0700 (PDT) Received: by 10.112.67.42 with HTTP; Fri, 17 Jul 2015 18:25:16 -0700 (PDT) In-Reply-To: References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> <2279CC94-1E55-487E-9402-07D1055739F0@gmail.com> Date: Sat, 18 Jul 2015 10:25:16 +0900 Message-ID: Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt From: Nobo Akiya To: Santosh P K Content-Type: multipart/alternative; boundary=001a11c33d5e4fb62b051b1c2d77 Archived-At: Cc: "Reshad Rahman \(rrahman\)" , "rtg-bfd@ietf.org" , "S. Davari" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 18 Jul 2015 01:25:22 -0000 --001a11c33d5e4fb62b051b1c2d77 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Santosh, Essentially the sender can periodically send self-destined packets (MAC-DA =3D sender VTEP) that gets looped back on the remote VTEP (this better exercises the VNI forwarding on the remote VTEP). Similar concept as BFD echo. Thanks! -Nobo On Fri, Jul 10, 2015 at 11:01 PM, Santosh P K wrote= : > Nobo and Sharram, > > I am bit confused did you mean MAC-DA of the receiver VTEP? How woul= d > sender VTEP solve the problem? > > > > > > Thanks > > Santosh P K > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] *On Behalf Of *S. Davar= i > *Sent:* Friday, July 10, 2015 6:52 PM > *To:* Nobo Akiya > *Cc:* Reshad Rahman (rrahman); rtg-bfd@ietf.org > > *Subject:* Re: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Yes that is the solution. > > Regards, > > Shahram > > > > > On Jul 10, 2015, at 12:12 AM, Nobo Akiya wrote= : > > Long and interesting thread :) > > > > How about setting the MAC-DA as the MAC of the sender VTEP? > > > > Thanks! > > > > -Nobo > > > > On Fri, Jul 3, 2015 at 5:39 AM, Shahram Davari > wrote: > > Sure. > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] *On Behalf Of *Shahram > Davari > *Sent:* Thursday, July 02, 2015 11:58 AM > *To:* Reshad Rahman (rrahman); Shahram Davari > *Cc:* rtg-bfd@ietf.org > *Subject:* RE: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Agree. But we can may be come up with a more efficient solution. > > > > Thx > SD > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *Reshad Rahman (rrahman) > *Sent:* Thursday, July 02, 2015 5:46 AM > *To:* Shahram Davari > *Cc:* rtg-bfd@ietf.org > *Subject:* Re: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Hi Shahram, > > > > Agreed. My point is that running BFD on the tunnel is not good enough for > some failures. > > > > Regards, > > Reshad. > > > > > > *From: *Rtg-bfd on behalf of Shahram Davari < > realestate.davari@gmail.com> > *Date: *Thursday, July 2, 2015 at 12:25 AM > *To: *Reshad > *Cc: *Shahram Davari , "rtg-bfd@ietf.org" < > rtg-bfd@ietf.org> > *Subject: *Re: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Hi Reshad, > > > > You don=E2=80=99t need to run continuous BFD session per VNI to detect U= DP port > configuration issue. To justify running BFD per VNI, one needs to show th= at > the forwarding of each of those BFD sessions depends on specific VNI valu= e. > > > > > Thx > > Shahram > > > > On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) > wrote: > > > > Hi Shahram, > > > > I agree that running BFD between VTEPs per VNI might not scale well. But > by just running BFD on the IP tunnel IMO you won=E2=80=99t detect certain= problems, > maybe hypothetical, such as the UDP port being blocked (e.g. Due to a > misconfigured ACL). > > > > Regards, > > Reshad. > > > > *From: *Rtg-bfd on behalf of Shahram Davari < > davari@broadcom.com> > *Date: *Tuesday, June 30, 2015 at 9:24 PM > *To: *Santosh P K , "S. Davari" < > realestate.davari@gmail.com>, "rtg-bfd@ietf.org" > *Subject: *RE: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Santosh, > > > > Is the BFD you are describing in your draft unicast or multicast? If > unicast then service nodes would not apply. > > > > Also if there is a service node then one can run BFD on the IP tunnel > between source VTEP and service node and between service node and the > destination VTEP. This is much more scalable than running end-to-end BFD > between VTEPs per VNI. You could even use such BFD to switch to a backup > service node if there is failure to the main service node. > > > > Thx > > Shahram > > > > *From:* Santosh P K [mailto:santoshpk@juniper.net > ] > *Sent:* Tuesday, June 30, 2015 2:14 AM > *To:* S. Davari; Shahram Davari; rtg-bfd@ietf.org > *Subject:* RE: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > There can be few VTEPs who might have capabilities to multicast the > packet. In such a scenario VTEP will send that packet to service node and > service node will do a multicast on its behalf. > > > > > > Thanks > > Santosh P K > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *S. Davari > *Sent:* Monday, June 29, 2015 10:48 AM > *To:* Shahram Davari; rtg-bfd@ietf.org > *Subject:* Re: New Version Notification for > draft-spallagatti-bfd-vxlan-00.txt > > > > Hi > > > > What is a service node? > > > > Thx > > > > Sd > > > > > > Hi Prasad , > > I don't see how you get more coverage having a VXLAN tag. > > Since you are not testing the VXLAN based VFI/VRF forwarding. By that I > mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. > GVP1> One of the aspects of the next version of the draft will have a > valid inner DIP instead of 127/8. This should help address your concern t= o > an extent. > Also you are not testing the mapping from AC (Attachment Circuit) to a > VXLAN tag. > GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , > not using it as an excuse but I am just noting the precedent here. > > In my opinion all you are testing, is that at the other end of an IP > Tunnel a specific VXLAN exist or not. Which does not require running > continuous BFD. > GVP1> There are specific use-cases (see note about Service Node > reachability in Sec 2 of the draft) that require continuous monitoring of > some special-purpose VTEPs. > > In my opinion this is a very in efficient way of getting that information= . > The controller should be able to get this information much more > efficiently. > > It would be good if you can provide an example of what you think is more > coverage than BFD. Or at least what extra coverage do you exactly have in > mind, since this draft is not capable of more coverage than standard BFD > over the IP tunnel. > > Regards, > Shahram > > Regards, > > Shahram > > > > > On Jun 27, 2015, at 7:06 AM, Shahram Davari wrote: > > Hi Prasad , > > I don't see how you get more coverage having a VXLAN tag. > > Since you are not testing the VXLAN based VFI/VRF forwarding. By that I > mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. > GVP1> One of the aspects of the next version of the draft will have a > valid inner DIP instead of 127/8. This should help address your concern t= o > an extent. > Also you are not testing the mapping from AC (Attachment Circuit) to a > VXLAN tag. > GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as well= , > not using it as an excuse but I am just noting the precedent here. > > In my opinion all you are testing, is that at the other end of an IP > Tunnel a specific VXLAN exist or not. Which does not require running > continuous BFD. > GVP1> There are specific use-cases (see note about Service Node > reachability in Sec 2 of the draft) that require continuous monitoring of > some special-purpose VTEPs. > > In my opinion this is a very in efficient way of getting that information= . > The controller should be able to get this information much more > efficiently. > > It would be good if you can provide an example of what you think is more > coverage than BFD. Or at least what extra coverage do you exactly have in > mind, since this draft is not capable of more coverage than standard BFD > over the IP tunnel. > > Regards, > Shahram > > > > > > --001a11c33d5e4fb62b051b1c2d77 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Santosh,

Essentially the sender can = periodically send self-destined packets (MAC-DA =3D sender VTEP) that gets = looped back on the remote VTEP (this better exercises the VNI forwarding on= the remote VTEP). Similar concept as BFD echo.

Th= anks!

-Nobo
=
On Fri, Jul 10, 2015 at 11:01 PM, Santosh P = K <santoshpk@juniper.net> wrote:

Nobo and Sharram,

=C2=A0=C2=A0=C2=A0=C2=A0 I am bit con= fused did you mean MAC-DA of the receiver VTEP? How would sender VTEP solve= the problem?

=C2=A0

=C2=A0

Thanks

Santosh P K

=C2=A0

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari
Sent: Friday, July 10, 2015 6:52 PM
To: Nobo Akiya
Cc: Reshad Rahman (rrahman); rtg-bfd@ietf.org


Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

=C2=A0

Yes that is the solution.

Regards,

Shahram

=C2=A0


On Jul 10, 2015, at 12:12 AM, Nobo Akiya <nobo.akiya.dev@gmail.com> wrote:<= /u>

Long and interesting thread :)

=C2=A0

How about setting the MAC-DA as the MAC of the sende= r VTEP?

=C2=A0

Thanks!

=C2=A0

-Nobo

=C2=A0

On Fri, Jul 3, 2015 at 5:39 AM, Shahram Davari <<= a href=3D"mailto:davari@broadcom.com" target=3D"_blank">davari@broadcom.com= > wrote:

Sure.

=C2=A0

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Shahram Davari
Sent: Thursday, July 02, 2015 11:58 AM
To: Reshad Rahman (rrahman); Shahram Davari
Cc: rtg-bfd@ie= tf.org
Subject: RE: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

=C2=A0

Agree. But we can may be come up with= a more efficient solution.

=C2=A0

Thx
SD

=C2=A0

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Reshad Rahman (rrahman)
Sent: Thursday, July 02, 2015 5:46 AM
To: Shahram Davari
Cc: rtg-bfd@ie= tf.org
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

=C2=A0

Hi Shahram,

=C2=A0

Agreed. My point is that running BFD on= the tunnel is not good enough for some failures.

=C2=A0

Regards,

Reshad.=C2=A0

=C2=A0

=C2=A0

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Shahra= m Davari <realestate.davari@gmail.com>
Date: Thursday, July 2, 2015 at 12:25 AM
To: Reshad <rrahman@cisco.com>
Cc: Shahram Davari <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>= ;
Subject: Re: New Version Notification for draft-spallagatti-bfd-vxla= n-00.txt

=C2=A0

Hi Reshad,

=C2=A0

You don=E2=80=99t need to run continuou= s =C2=A0BFD session per VNI to detect UDP port configuration issue. To just= ify running BFD per VNI, one needs to show that the forwarding of each of thos= e BFD sessions depends on specific VNI value. =C2=A0=C2=A0=

=C2=A0

Thx

Shahram

=C2=A0

On Jul 1, 2015, at 6:22 PM, Reshad Rahm= an (rrahman) <rra= hman@cisco.com> wrote:

=C2=A0

Hi Shahram,

=C2=A0

I agree that running BFD between VTEPs = per VNI might not scale well. But by just running BFD on the IP tunnel IMO you won=E2=80=99t detect certain problems, maybe hypothetical, = such as the UDP port being blocked (e.g. Due to a misconfigured ACL).

=C2=A0

Regards,

Reshad.

=C2=A0

From:=C2=A0R= tg-bfd <rtg-bfd-bounces@ietf.org> on behalf of S= hahram Davari <= davari@broadcom.com>
Date:=C2=A0Tuesday, June 30, 2015 at 9:24 PM
To:=C2=A0Santosh P K <santoshpk@juniper.net>, "S. Davari" <realestate.davari@gmai= l.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.o= rg>
Subject:=C2=A0RE: New Version Notification for draft-spallagatti-bfd= -vxlan-00.txt

=C2=A0

Santosh,

=C2=A0

Is the BFD you=C2=A0 are describing i= n your draft unicast or multicast? If unicast then service nodes would not apply.

=C2=A0

Also if there is a service node then = one can run BFD on the IP tunnel between source VTEP and service node and between service node and the destination VTEP. This is much more = scalable than running end-to-end BFD between VTEPs per VNI. You could even = use such BFD to switch to a backup service node if there is failure to the = main service node.

=C2=A0

Thx

Shahram

=C2=A0

From:=C2=A0San= tosh P K [mailto:santoshpk@juniper.net]=C2=A0
Sent:=C2=A0Tuesday, June 30, 2015 2:14 AM
To:=C2=A0S. Davari; Shahram Davari;=C2=A0rtg-bfd@ietf.org
Subject:=C2=A0RE: New Version Notification for draft-spallagatti-bfd= -vxlan-00.txt

=C2=A0<= /u>

There can be few VTEPs who might have= capabilities to multicast the packet. In such a scenario VTEP will send that packet to service node and service node will do a multicast= on its behalf.=C2=A0

=C2=A0

=C2=A0

Thanks

Santosh P K

=C2=A0

From:=C2=A0R= tg-bfd [mailto:rtg-bfd-bounces@ietf.org]=C2=A0On Be= half Of=C2=A0S. Davari
Sent:=C2=A0Monday, June 29, 2015 10:48 AM
To:=C2=A0Shahram Davari;=C2=A0rtg-bfd@ietf.org Subject:=C2=A0Re: New Version Notification for draft-spallagatti-bfd= -vxlan-00.txt

=C2=A0<= /u>

Hi<= /p>

=C2=A0<= /u>

What is a service node?<= /span>

=C2=A0<= /u>

Thx=

=C2=A0<= /u>

Sd<= /p>

=C2=A0<= /u>

=C2=A0<= /u>

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag.=C2=A0

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag.=C2=A0
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= .=C2=A0

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel.=C2=A0

Regards,
Shahram

Regards,

Shahram=

=C2=A0<= /u>


On Jun 27, 2015, at 7:06 AM, Shahram Davari <davari@broadcom.= com> wrote:

Hi Prasad ,

I don't see how you get more coverage having a VXLAN tag.=C2=A0

Since you are not testing the VXLAN based VFI/VRF forwarding. By that I mea= n you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding.
GVP1> One of the aspects of the next version of the draft will have a va= lid inner DIP instead of 127/8. This should help address your concern to an= extent.
Also you are not testing the mapping from AC (Attachment Circuit) to a VXLA= N tag.=C2=A0
GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as wel= l, not using it as an excuse but I am just noting the precedent here.

In my opinion all you are testing, is that at the other end of an IP Tunnel= a specific VXLAN exist or not. Which does not require running continuous B= FD.
GVP1> There are specific use-cases (see note about Service Node reachabi= lity in Sec 2 of the draft) that require continuous monitoring of some spec= ial-purpose VTEPs.

In my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more efficiently= .=C2=A0

It would be good if you can provide an example of what you think is more co= verage than BFD. Or at least what extra coverage do you exactly have in min= d, since this draft is not capable of more coverage than standard BFD over = the IP tunnel.=C2=A0

Regards,
Shahram

=C2=A0

=C2=A0


--001a11c33d5e4fb62b051b1c2d77-- From nobody Fri Jul 17 18:30:24 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2B9051A044D for ; Fri, 17 Jul 2015 18:29:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 Aswf13beeH6X for ; Fri, 17 Jul 2015 18:29:25 -0700 (PDT) Received: from rcdn-iport-2.cisco.com (rcdn-iport-2.cisco.com [173.37.86.73]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3B1FE1A0439 for ; Fri, 17 Jul 2015 18:29:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=57968; q=dns/txt; s=iport; t=1437182965; x=1438392565; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=dSRgkywrLJHZIL4nN16GAxnvlVk20DzEehwS+Db/qzk=; b=DL/D0x7mgUByTqKDbOj0d5OJKw7Z71xYnEqVsBmLdn+lhhmCZ0bKqT7s lx19zN5rfkWmi4QW3gS5hVRYqlsTH0xfKhpfjg7EruNK67ljmMEsDf3pi TPhCyP5dzIrzlpF/klfHLxoF3C39zWo8vh98FcaySXZK04dNSsHnL9EHi 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0AfAwCyq6lV/4YNJK1agkZNVGkGu1kJh2wCHIEpOBQBAQEBAQEBgQqEIwEBAQQjChowAhACAQgRAwEBAQsWAQYDAgICHxEUCQgCBAENBQgTBId6AxEBuWqFG4sjDYUuAQEBAQEBAQEBAQEBAQEBAQEBAQEBF4tMgk2BTTsWChEGAYJoL4EUBZFagnUBijiDKoQZjAKDR4NhJoINHIFTbwGBRoEEAQEB X-IronPort-AV: E=Sophos; i="5.15,497,1432598400"; d="scan'208,217"; a="16482453" Received: from alln-core-12.cisco.com ([173.36.13.134]) by rcdn-iport-2.cisco.com with ESMTP; 18 Jul 2015 01:29:15 +0000 Received: from xhc-rcd-x11.cisco.com (xhc-rcd-x11.cisco.com [173.37.183.85]) by alln-core-12.cisco.com (8.14.5/8.14.5) with ESMTP id t6I1TFd8003228 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Sat, 18 Jul 2015 01:29:15 GMT Received: from xmb-rcd-x15.cisco.com ([169.254.5.142]) by xhc-rcd-x11.cisco.com ([173.37.183.85]) with mapi id 14.03.0195.001; Fri, 17 Jul 2015 20:29:14 -0500 From: "Vengada Prasad Govindan (venggovi)" To: Nobo Akiya , Santosh P K Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Topic: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Index: AQHQsEzmEknWHHNqr0WZplypYqzrJZ3AKHaggACBqID//7a8kIAAVzEAgAKROYCAAdQzAIABDzCAgAGRpQCAADMkAIAAi+iAgABn/oCAABwugIALsT0AgABnXACAAArtAIALv2EA//+su/A= Date: Sat, 18 Jul 2015 01:29:14 +0000 Message-ID: <315041E4211CB84E86EF7C25A2AB583D545D1911@xmb-rcd-x15.cisco.com> References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> <2279CC94-1E55-487E-9402-07D1055739F0@gmail.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [171.70.246.98] Content-Type: multipart/alternative; boundary="_000_315041E4211CB84E86EF7C25A2AB583D545D1911xmbrcdx15ciscoc_" MIME-Version: 1.0 Archived-At: X-Mailman-Approved-At: Fri, 17 Jul 2015 18:30:23 -0700 Cc: "Reshad Rahman \(rrahman\)" , "rtg-bfd@ietf.org" , "S. Davari" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 18 Jul 2015 01:29:29 -0000 --_000_315041E4211CB84E86EF7C25A2AB583D545D1911xmbrcdx15ciscoc_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGVsbG8gTm9ibywNCiAgV2hpbGUgSSBkbyBhZ3JlZSB0aGF0IHRoZXJlIGNvdWxkIGJlIHZhbHVl IGluIGdldHRpbmcgYSBzZWxmLWRlc3RpbmVkIHBhY2tldCBlbmNhcHN1bGF0ZWQgaW4gVnhMQU4g YXMgeW91IGRlc2NyaWJlIGJlbG93LCB0aGUgZGF0YXBhdGggZmxvdyBvZiBWeExBTiBkZWNhcCBm b2xsb3dlZCBieSBhIEwyIGxvb2t1cCBhbmQgYSBWeExBTiAocmUpZW5jYXAgaXMgbm90IHN1cHBv cnRlZCBvbiBtb3N0IHNpbGljb24gKFNoYWhyYW0sIHBsZWFzZSBjb3JyZWN0IG1lIGlmIEkgYW0g d3JvbmcgaGVyZSkgYW5kIGhlbmNlIGRpZmZpY3VsdCB0byBpbXBsZW1lbnQuIEluc3RlYWQgYSBW eExBTiBBc3luYyBpcyB3aGF0IGlzIHByb3Bvc2VkIGluIHRoZSBkcmFmdC4NClRoYW5rcw0KUHJh 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Davari" , Santosh P K Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Topic: issues about draft-ietf-bfd-rfc5884-clarifications-02 Thread-Index: AQHQwPdu4i3sY5ltyEKoVGB9I+6mk53g/X3Q Date: Sat, 18 Jul 2015 09:59:01 +0000 Message-ID: <7347100B5761DC41A166AC17F22DF1122187A32E@eusaamb103.ericsson.se> References: <7CD7F2E3-88E5-4237-8FCC-BA95FAD7F281@yahoo.com> In-Reply-To: <7CD7F2E3-88E5-4237-8FCC-BA95FAD7F281@yahoo.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [147.117.188.12] Content-Type: multipart/alternative; boundary="_000_7347100B5761DC41A166AC17F22DF1122187A32Eeusaamb103erics_" MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFuphkeLIzCtJLcpLzFFi42KZXLonVnfr8ZWhBrsv61kcfN7EaPHh+DF2 i89/tjFaXLu7ldmBxWPJkp9MHtebrrJ7zJp1mMljzb4fLAEsUVw2Kak5mWWpRfp2CVwZ2+d0 MhYcmshUseHMWrYGxjVdTF2MHBwSAiYSpy5zdDFyApliEhfurWfrYuTiEBI4yijx9vRaZghn 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([2602:306:ce11:17c0:59a:c752:ee98:c2dc]) by smtp.gmail.com with ESMTPSA id t2sm12745144pbs.10.2015.07.17.19.56.28 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 17 Jul 2015 19:56:29 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_9B25B621-799D-44D9-99C4-541BA0D9F9BC" Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) Subject: Re: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt From: Shahram Davari In-Reply-To: <315041E4211CB84E86EF7C25A2AB583D545D1911@xmb-rcd-x15.cisco.com> Date: Fri, 17 Jul 2015 19:56:26 -0700 Message-Id: References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> <2279CC94-1E55-487E-9402-07D1055739F0@gmail.com> <315041E4211CB84E86EF7C25A2AB583D545D1911@xmb-rcd-x15.cisco.com> To: "Vengada Prasad Govindan (venggovi)" X-Mailer: Apple Mail (2.2098) Archived-At: X-Mailman-Approved-At: Mon, 20 Jul 2015 00:45:26 -0700 Cc: "Reshad Rahman \(rrahman\)" , "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 18 Jul 2015 02:56:36 -0000 --Apple-Mail=_9B25B621-799D-44D9-99C4-541BA0D9F9BC Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi=20 Silicon supports L2 lookup after VXLAN termination, and then = re-encapsulation in another VXLAN Tunnel. The self MAC should also work = if Split Horizon is not enabled. Thx Shahram > On Jul 17, 2015, at 6:29 PM, Vengada Prasad Govindan (venggovi) = wrote: >=20 > Hello Nobo, > While I do agree that there could be value in getting a = self-destined packet encapsulated in VxLAN as you describe below, the = datapath flow of VxLAN decap followed by a L2 lookup and a VxLAN = (re)encap is not supported on most silicon (Shahram, please correct me = if I am wrong here) and hence difficult to implement. Instead a VxLAN = Async is what is proposed in the draft. > Thanks > Prasad > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Nobo = Akiya > Sent: Friday, July 17, 2015 6:25 PM > To: Santosh P K > Cc: Reshad Rahman (rrahman); rtg-bfd@ietf.org; S. Davari > Subject: Re: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Hi Santosh, > =20 > Essentially the sender can periodically send self-destined packets = (MAC-DA =3D sender VTEP) that gets looped back on the remote VTEP (this = better exercises the VNI forwarding on the remote VTEP). Similar concept = as BFD echo. > =20 > Thanks! > =20 > -Nobo > =20 > On Fri, Jul 10, 2015 at 11:01 PM, Santosh P K > wrote: > Nobo and Sharram, > I am bit confused did you mean MAC-DA of the receiver VTEP? How = would sender VTEP solve the problem? > =20 > =20 > Thanks > Santosh P K > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org = ] On Behalf Of S. Davari > Sent: Friday, July 10, 2015 6:52 PM > To: Nobo Akiya > Cc: Reshad Rahman (rrahman); rtg-bfd@ietf.org = >=20 > Subject: Re: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Yes that is the solution. >=20 > Regards, > Shahram > =20 >=20 > On Jul 10, 2015, at 12:12 AM, Nobo Akiya > wrote: >=20 > Long and interesting thread :) > =20 > How about setting the MAC-DA as the MAC of the sender VTEP? > =20 > Thanks! > =20 > -Nobo > =20 > On Fri, Jul 3, 2015 at 5:39 AM, Shahram Davari > wrote: > Sure. > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org = ] On Behalf Of Shahram Davari > Sent: Thursday, July 02, 2015 11:58 AM > To: Reshad Rahman (rrahman); Shahram Davari > Cc: rtg-bfd@ietf.org > Subject: RE: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Agree. But we can may be come up with a more efficient solution. > =20 > Thx > SD > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org = ] On Behalf Of Reshad Rahman (rrahman) > Sent: Thursday, July 02, 2015 5:46 AM > To: Shahram Davari > Cc: rtg-bfd@ietf.org > Subject: Re: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Hi Shahram, > =20 > Agreed. My point is that running BFD on the tunnel is not good enough = for some failures. > =20 > Regards, > Reshad.=20 > =20 > =20 > From: Rtg-bfd > on behalf of Shahram Davari = > > Date: Thursday, July 2, 2015 at 12:25 AM > To: Reshad > > Cc: Shahram Davari >, "rtg-bfd@ietf.org = " > > Subject: Re: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Hi Reshad, > =20 > You don=E2=80=99t need to run continuous BFD session per VNI to = detect UDP port configuration issue. To justify running BFD per VNI, one = needs to show that the forwarding of each of those BFD sessions depends = on specific VNI value. =20 > =20 > Thx > Shahram > =20 > On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) > wrote: > =20 > Hi Shahram, > =20 > I agree that running BFD between VTEPs per VNI might not scale well. = But by just running BFD on the IP tunnel IMO you won=E2=80=99t detect = certain problems, maybe hypothetical, such as the UDP port being blocked = (e.g. Due to a misconfigured ACL). > =20 > Regards, > Reshad. > =20 > From: Rtg-bfd > on behalf of Shahram Davari = > > Date: Tuesday, June 30, 2015 at 9:24 PM > To: Santosh P K >, "S. Davari" = >, = "rtg-bfd@ietf.org " > > Subject: RE: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Santosh, > =20 > Is the BFD you are describing in your draft unicast or multicast? If = unicast then service nodes would not apply. > =20 > Also if there is a service node then one can run BFD on the IP tunnel = between source VTEP and service node and between service node and the = destination VTEP. This is much more scalable than running end-to-end BFD = between VTEPs per VNI. You could even use such BFD to switch to a backup = service node if there is failure to the main service node. > =20 > Thx > Shahram > =20 > From: Santosh P K [mailto:santoshpk@juniper.net = ]=20 > Sent: Tuesday, June 30, 2015 2:14 AM > To: S. Davari; Shahram Davari; rtg-bfd@ietf.org = > Subject: RE: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > There can be few VTEPs who might have capabilities to multicast the = packet. In such a scenario VTEP will send that packet to service node = and service node will do a multicast on its behalf.=20 > =20 > =20 > Thanks > Santosh P K > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org = ] On Behalf Of S. Davari > Sent: Monday, June 29, 2015 10:48 AM > To: Shahram Davari; rtg-bfd@ietf.org > Subject: Re: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt > =20 > Hi > =20 > What is a service node? > =20 > Thx > =20 > Sd > =20 > =20 > Hi Prasad , >=20 > I don't see how you get more coverage having a VXLAN tag.=20 >=20 > Since you are not testing the VXLAN based VFI/VRF forwarding. By that = I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. > GVP1> One of the aspects of the next version of the draft will have a = valid inner DIP instead of 127/8. This should help address your concern = to an extent. > Also you are not testing the mapping from AC (Attachment Circuit) to a = VXLAN tag.=20 > GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as = well, not using it as an excuse but I am just noting the precedent here. >=20 > In my opinion all you are testing, is that at the other end of an IP = Tunnel a specific VXLAN exist or not. Which does not require running = continuous BFD. > GVP1> There are specific use-cases (see note about Service Node = reachability in Sec 2 of the draft) that require continuous monitoring = of some special-purpose VTEPs. >=20 > In my opinion this is a very in efficient way of getting that = information. The controller should be able to get this information much = more efficiently.=20 >=20 > It would be good if you can provide an example of what you think is = more coverage than BFD. Or at least what extra coverage do you exactly = have in mind, since this draft is not capable of more coverage than = standard BFD over the IP tunnel.=20 >=20 > Regards, > Shahram > Regards, > Shahram > =20 >=20 > On Jun 27, 2015, at 7:06 AM, Shahram Davari > wrote: >=20 > Hi Prasad , >=20 > I don't see how you get more coverage having a VXLAN tag.=20 >=20 > Since you are not testing the VXLAN based VFI/VRF forwarding. By that = I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) forwarding. > GVP1> One of the aspects of the next version of the draft will have a = valid inner DIP instead of 127/8. This should help address your concern = to an extent. > Also you are not testing the mapping from AC (Attachment Circuit) to a = VXLAN tag.=20 > GVP1> Agreed, this aspect has not (yet) been addressed by RFC5884 as = well, not using it as an excuse but I am just noting the precedent here. >=20 > In my opinion all you are testing, is that at the other end of an IP = Tunnel a specific VXLAN exist or not. Which does not require running = continuous BFD. > GVP1> There are specific use-cases (see note about Service Node = reachability in Sec 2 of the draft) that require continuous monitoring = of some special-purpose VTEPs. >=20 > In my opinion this is a very in efficient way of getting that = information. The controller should be able to get this information much = more efficiently.=20 >=20 > It would be good if you can provide an example of what you think is = more coverage than BFD. Or at least what extra coverage do you exactly = have in mind, since this draft is not capable of more coverage than = standard BFD over the IP tunnel.=20 >=20 > Regards, > Shahram --Apple-Mail=_9B25B621-799D-44D9-99C4-541BA0D9F9BC Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Hi 

Silicon supports L2 lookup after VXLAN termination, and then = re-encapsulation in another VXLAN Tunnel. The self MAC should also work = if Split Horizon is not enabled.

Thx
Shahram


On Jul 17, 2015, at 6:29 PM, = Vengada Prasad Govindan (venggovi) <venggovi@cisco.com> = wrote:

Hello Nobo,
  While I do agree that there could = be value in getting a self-destined packet encapsulated in VxLAN as you = describe below, the datapath flow of VxLAN decap followed by a L2 lookup = and a VxLAN (re)encap is not supported on most silicon (Shahram, please = correct me if I am wrong here) and hence difficult to implement. Instead = a VxLAN Async is what is proposed in the draft.
Thanks
Prasad
 
From: Rtg-bfd = [mailto:rtg-bfd-bounces@ietf.org] On Behalf = Of Nobo Akiya
Sent: Friday, July 17, 2015 6:25 = PM
To: Santosh P K
Cc: Reshad Rahman (rrahman); rtg-bfd@ietf.org; S. = Davari
Subject: Re: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt
 
Hi Santosh,
 
Essentially the sender can periodically send = self-destined packets (MAC-DA =3D sender VTEP) that gets looped back on = the remote VTEP (this better exercises the VNI forwarding on the remote = VTEP). Similar concept as BFD echo.
 
Thanks!
 
-Nobo
 
On Fri, Jul 10, 2015 at 11:01 PM, Santosh P K <santoshpk@juniper.net> wrote:
Nobo and = Sharram,
     = I am bit confused did you mean MAC-DA of the receiver VTEP? How would = sender VTEP solve the problem?
 
 
Thanks
Santosh P K
 
From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf = Of S. Davari
Sent: Friday, July 10, 2015 6:52 = PM
To: Nobo Akiya
Cc: Reshad Rahman = (rrahman); rtg-bfd@ietf.org

Subject: Re: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt
 
Yes that is the solution.

Regards,
Shahram
 


On= Jul 10, 2015, at 12:12 AM, Nobo Akiya <nobo.akiya.dev@gmail.com> wrote:

Long and interesting thread :)
 
How about setting the MAC-DA as the MAC = of the sender VTEP?
 
Thanks!
 
-Nobo
 
On Fri, Jul 3, 2015 at 5:39 AM, Shahram Davari <davari@broadcom.com> wrote:
Sure.
 
From: Rtg-bfd = [mailto:rtg-bfd-bounces@ietf.org] On Behalf = Of Shahram = Davari
Sent: Thursday, July 02, 2015 = 11:58 AM
To: Reshad Rahman (rrahman); = Shahram Davari
Cc: rtg-bfd@ietf.org
Subject: RE: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt
 
Agree. But we can may be come up with a more efficient = solution.
 
Thx
SD
 
From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf = Of Reshad Rahman = (rrahman)
Sent: Thursday, July 02, 2015 = 5:46 AM
To: Shahram Davari
Cc: rtg-bfd@ietf.org
Subject: Re: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt
 
Hi Shahram,
 
Agreed. My point is that running BFD on the = tunnel is not good enough for some failures.
 
Regards,
Reshad. 
 
 
From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Shahram Davari = <realestate.davari@gmail.com>
Date: Thursday, July 2, 2015 = at 12:25 AM
To: Reshad <rrahman@cisco.com>
Cc: Shahram Davari <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" = <rtg-bfd@ietf.org>
Subject: Re: New Version = Notification for draft-spallagatti-bfd-vxlan-00.txt
 
Hi Reshad,
 
You don=E2=80=99t need to run continuous =  BFD session per VNI to detect UDP port configuration issue. To = justify running BFD per VNI, one needs to show that the forwarding of = each of those BFD sessions depends on specific VNI value. =   
 
Thx
Shahram
 
On Jul 1, 2015, at 6:22 PM, Reshad Rahman (rrahman) <rrahman@cisco.com> = wrote:
 
Hi Shahram,
 
I agree that running BFD between VTEPs per VNI = might not scale well. But by just running BFD on the IP tunnel IMO you = won=E2=80=99t detect certain problems, maybe hypothetical, such as the = UDP port being blocked (e.g. Due to a misconfigured ACL).
 
Regards,
Reshad.
 
From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Shahram = Davari <davari@broadcom.com>
Date: Tuesday, June 30, 2015 at 9:24 = PM
To: Santosh P K <santoshpk@juniper.net>, "S. Davari" = <realestate.davari@gmail.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: RE: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt
 
Santosh,
 
Is the BFD you  = are describing in your draft unicast or multicast? If unicast then = service nodes would not apply.
 
Also if there is a = service node then one can run BFD on the IP tunnel between source VTEP = and service node and between service node and the destination VTEP. This = is much more scalable than running end-to-end BFD between VTEPs per VNI. = You could even use such BFD to switch to a backup service node if there = is failure to the main service node.
 
Thx
Shahram
 
From: Santosh P K [mailto:santoshpk@juniper.net] 
Sent: Tuesday, June 30, 2015 2:14 AM
To: S. Davari; Shahram Davari; rtg-bfd@ietf.org
Subject: RE: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt
 
There can be few VTEPs who might have = capabilities to multicast the packet. In such a scenario VTEP will send = that packet to service node and service node will do a multicast on its = behalf. 
 
 
Thanks
Santosh P K
 
From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari
Sent: Monday, June 29, 2015 10:48 AM
To: Shahram Davari; rtg-bfd@ietf.org
Subject: Re: New Version Notification for = draft-spallagatti-bfd-vxlan-00.txt
 
Hi
 
What is a service node?
 
Thx
 
Sd
 
 
Hi Prasad ,

I don't see how you = get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. = By that I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) = forwarding.
GVP1> One of the aspects of the next = version of the draft will have a valid inner DIP instead of 127/8. This = should help address your concern to an extent.
Also you = are not testing the mapping from AC (Attachment Circuit) to a VXLAN = tag. 
GVP1> Agreed, this aspect has not (yet) been = addressed by RFC5884 as well, not using it as an excuse but I am just = noting the precedent here.

In my opinion = all you are testing, is that at the other end of an IP Tunnel a specific = VXLAN exist or not. Which does not require running continuous BFD.
GVP1> There are specific use-cases (see note about Service = Node reachability in Sec 2 of the draft) that require continuous = monitoring of some special-purpose VTEPs.

In = my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more = efficiently. 

It would be good if you = can provide an example of what you think is more coverage than BFD. Or = at least what extra coverage do you exactly have in mind, since this = draft is not capable of more coverage than standard BFD over the IP = tunnel. 

Regards,
Shahram
Regards,
Shahram
 


On Jun 27, 2015, at 7:06 AM, Shahram Davari = <davari@broadcom.com> = wrote:

Hi Prasad ,

I don't see how you = get more coverage having a VXLAN tag. 

Since you are not testing the VXLAN based VFI/VRF forwarding. = By that I mean you are not testing (DA, VXLAN ) or (DIP, VXLAN) = forwarding.
GVP1> One of the aspects of the next = version of the draft will have a valid inner DIP instead of 127/8. This = should help address your concern to an extent.
Also you = are not testing the mapping from AC (Attachment Circuit) to a VXLAN = tag. 
GVP1> Agreed, this aspect has not (yet) been = addressed by RFC5884 as well, not using it as an excuse but I am just = noting the precedent here.

In my opinion = all you are testing, is that at the other end of an IP Tunnel a specific = VXLAN exist or not. Which does not require running continuous BFD.
GVP1> There are specific use-cases (see note about Service = Node reachability in Sec 2 of the draft) that require continuous = monitoring of some special-purpose VTEPs.

In = my opinion this is a very in efficient way of getting that information. = The controller should be able to get this information much more = efficiently. 

It would be good if you = can provide an example of what you think is more coverage than BFD. Or = at least what extra coverage do you exactly have in mind, since this = draft is not capable of more coverage than standard BFD over the IP = tunnel. 

Regards,
Shahram
=
=
=
= --Apple-Mail=_9B25B621-799D-44D9-99C4-541BA0D9F9BC-- From nobody Mon Jul 20 00:45:31 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F0E971B2A03 for ; Sat, 18 Jul 2015 02:41:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -104.2 X-Spam-Level: X-Spam-Status: No, score=-104.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=ham 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 lpsxo8_Kq9g1 for ; Sat, 18 Jul 2015 02:41:02 -0700 (PDT) Received: from usevmg20.ericsson.net (usevmg20.ericsson.net [198.24.6.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EA01B1B29CC for ; Sat, 18 Jul 2015 02:41:01 -0700 (PDT) X-AuditID: c618062d-f799e6d00000329e-e8-55a9c37b4652 Received: from EUSAAHC004.ericsson.se (Unknown_Domain [147.117.188.84]) by usevmg20.ericsson.net (Symantec Mail Security) with SMTP id A2.0D.12958.B73C9A55; Sat, 18 Jul 2015 05:09:48 +0200 (CEST) Received: from EUSAAMB103.ericsson.se ([147.117.188.120]) by EUSAAHC004.ericsson.se ([147.117.188.84]) with mapi id 14.03.0210.002; Sat, 18 Jul 2015 05:41:00 -0400 From: Gregory Mirsky To: Nobo Akiya , Santosh P K Subject: RE: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Topic: New Version Notification for draft-spallagatti-bfd-vxlan-00.txt Thread-Index: AQHQsEzmEknWHHNqr0WZplypYqzrJZ3AKHaggABw5ICAAAv0AIAAAfoAgAKROICAAdQzAIABDzCAgAGRpgCAADMjAIAAi+mAgABn/YCAABwvgIALsT0AgABnXACAAArsAIALv2IAgABGj8A= Date: Sat, 18 Jul 2015 09:41:00 +0000 Message-ID: <7347100B5761DC41A166AC17F22DF1122187A2B0@eusaamb103.ericsson.se> References: <201A584A-C88F-4B5E-B43B-5BDF04F443B7@gmail.com> <315041E4211CB84E86EF7C25A2AB583D5457CD9E@xmb-rcd-x15.cisco.com> <315041E4211CB84E86EF7C25A2AB583D5457CDFC@xmb-rcd-x15.cisco.com> <93F4D9E1-2498-4E82-8559-17BBA18BDDB5@broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F4941F@SJEXCHMB12.corp.ad.broadcom.com> <454798CB-8559-40C8-8714-B5B44D9A5921@gmail.com> <4A6CE49E6084B141B15C0713B8993F2831F4FEE1@SJEXCHMB12.corp.ad.broadcom.com> <4A6CE49E6084B141B15C0713B8993F2831F501BA@SJEXCHMB12.corp.ad.broadcom.com> <2279CC94-1E55-487E-9402-07D1055739F0@gmail.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [147.117.188.12] Content-Type: multipart/alternative; boundary="_000_7347100B5761DC41A166AC17F22DF1122187A2B0eusaamb103erics_" MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprMIsWRmVeSWpSXmKPExsUyuXRPiG7N4ZWhBg/6WSyenHvHYnHgiLnF tRWt7Baf/2xjtLh2dyuzA6vHlN8bWT12zrrL7rFkyU8mj+tNV9kDWKK4bFJSczLLUov07RK4 MhqbJ7EWHLrMXHF0wS7WBsYNx5m7GDk5JARMJP5fnc8EYYtJXLi3nq2LkYtDSOAoo8Td67ug nOWMEmt+rQCrYhMwknixsYcdxBYR8JN4ub+HBcRmFmhllJg5zb2LkYNDWMBHYuNsDogSX4nb r5aAzRERmAdUcu4OWC+LgKrE9wm7wK7gBSpaNH8XE8SyjRwSp3buARvKKRAoseX+XLAiRqDz vp9awwSxTFzi1hOYswUkluw5D/WOqMTLx/9YIWwliTmvrzFD1OdLbG65yQSxTFDi5MwnLBMY RWchGTULSdksJGWzgP5hFtCUWL9LH6JEUWJK90N2CFtDonXOXHZk8QWM7KsYOUqLU8ty040M NjECY/GYBJvuDsY9Ly0PMQpwMCrx8D6oWhkqxJpYVlyZe4hRmoNFSZzXMSovVEggPbEkNTs1 tSC1KL6oNCe1+BAjEwenVAPj5J0pKayKJ6ZH6W5+zHltjvxBobnmrxrWZmwqLEw7HjVrkdCd Xc9tRM4xX1B9m3TpwSk7p/YN8lt1GhuXWPDJSkd9Kzm3m/fDMyNbI8vGQPcVxtyv1H45sp52 iHf/WzC1SHI3e8DqHfpn3HOc277ckdh2oinM84+2hBPHFdsPxgVrT8/LMIlQYinOSDTUYi4q TgQAh8PzqaYCAAA= Archived-At: X-Mailman-Approved-At: Mon, 20 Jul 2015 00:45:26 -0700 Cc: "Reshad Rahman \(rrahman\)" , "rtg-bfd@ietf.org" , "S. Davari" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 18 Jul 2015 09:41:06 -0000 --_000_7347100B5761DC41A166AC17F22DF1122187A2B0eusaamb103erics_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGkgTm9ibywNCkkgYWdyZWUgdGhhdCB0aGF0IHdpbGwgd29yayBhcyBsb25nIGFzIHRoZXJl4oCZ cyBubyBwb2lzb24tcmV2ZXJzZSBwb2xpY3kgZW5mb3JjZWQuIFdlIGhhZCBzaW1pbGFyIGRpc2N1 c3Npb24gaW4gTVBMUyBXRyBvbiBzZWxmLXBpbmcgZnJvbSBSb24gQm9uaWNhIHJlY2VudGx5LiBC RkQgQXN5bmNocm9ub3VzIG1vZGUgd291bGQgbm90IGNyZWF0ZSBjb25jZXJuIHdpdGggcG9pc29u LXJldmVyc2UuDQoNCiAgICAgICAgICAgICAgICBSZWdhcmRzLA0KICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICBHcmVnDQoNCkZyb206IFJ0Zy1iZmQgW21haWx0bzpydGctYmZkLWJvdW5j ZXNAaWV0Zi5vcmddIE9uIEJlaGFsZiBPZiBOb2JvIEFraXlhDQpTZW50OiBTYXR1cmRheSwgSnVs 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=?utf-8?Q?Re:_=E7=AD=94=E5=A4=8D:_RE:_issues_about_draft-ietf-bf?= =?utf-8?Q?d-rfc5884-clarifications-02?= From: "S. Davari" X-Mailer: iPhone Mail (12B440) In-Reply-To: <7347100B5761DC41A166AC17F22DF1122187A35B@eusaamb103.ericsson.se> Date: Sat, 18 Jul 2015 06:32:10 -0700 Content-Transfer-Encoding: 7bit Message-Id: <719024D8-0C8B-49B4-A7F8-4D1EDB707511@yahoo.com> References: <2DD8A28E-A2FA-41B5-8F9A-09F9217ED7CC@yahoo.com> <7347100B5761DC41A166AC17F22DF1122187A35B@eusaamb103.ericsson.se> To: Gregory Mirsky Archived-At: X-Mailman-Approved-At: Mon, 20 Jul 2015 00:45:26 -0700 Cc: "peng.shaofu@zte.com.cn" , "rtg-bfd@ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 18 Jul 2015 13:32:16 -0000 --Apple-Mail-DAB4D379-500E-4C35-A490-4B45B7A8FD60 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Agree. Regards, Shahram > On Jul 18, 2015, at 3:02 AM, Gregory Mirsky w= rote: >=20 > Hi Shahram, > but mp2p with IP/UDP encapsulation of BFD session would not have the probl= em either if it will use LSP Ping bootstrap because source IP addresses, I e= xpect, would be different. After bootstrap demultiplexing will be by Your Di= scriminator for each p2p BFD session of the same mp2p LSP. Would you agree? > =20 > Regards, > Greg > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari > Sent: Friday, July 17, 2015 9:15 AM > To: peng.shaofu@zte.com.cn > Cc: rtg-bfd@ietf.org > Subject: Re: =E7=AD=94=E5=A4=8D: RE: issues about draft-ietf-bfd-rfc5884-c= larifications-02 > =20 > Peng > =20 > I think you are assuming mp2p LSP. Since for P2P=20 > LSP we won't have this problem. Right? >=20 > Regards, > Shahram > =20 >=20 > On Jul 17, 2015, at 12:03 AM, peng.shaofu@zte.com.cn wrote: >=20 >=20 > Hi Santosh=20 >=20 > For example, there are two diferrent ingress (LSR1 & LSR2) want to establi= sh BFD session with the same egress (LSR3) for same FEC (3.3.3.9/32). PLease= see the following steps.=20 >=20 > step1: LSR1 construct an LSP echo request message, including LSR1-LD (100)= and FEC (3.3.3.9/32)=20 > step2: LSR3 received the echo request message, if FEC validation check suc= ceed, it will NEW a BFD entity, allocate LSR3-LD (200) based on tuple .=20 > Now LSR3 can send a BFD control packet with MD=3D200 YD=3D100.=20 > step3: LSR2 also construct an LSP echo request message, including LSR2-LD (= 100) and FEC (3.3.3.9/32)=20 > step4: LSR3 received the echo request message, if FEC validation check suc= ceed, it will match to the above already existing BFD session, because tuple= equal =20 >=20 > thanks=20 > Deccan=20 >=20 >=20 >=20 > Santosh P K > 2015-07-17 =E4=B8=8B=E5=8D=88 01:27=20 >=20 > =E6=94=B6=E4=BB=B6=E4=BA=BA > "MALLIK MUDIGONDA (mmudigon)" , "S. Davari" > =E6=8A=84=E9=80=81 > "peng.shaofu@zte.com.cn" , "rtg-bfd@ietf.org" > =E4=B8=BB=E9=A2=98 > RE: issues about draft-ietf-bfd-rfc5884-clarifications-02 > =20 >=20 >=20 >=20 > Mallik,=20 > When a BFD packet is received with your_disc as non-zero then we use on= ly that as demux entity. Your_discr is a value allocated by local router and= should be unique across the system. So where is the question of having any o= ther field to be used as demux? Are you talking about same discr for BFD ses= sion for same LSP in case of ECMP? Can you please explain more in detail wha= t is the scenario? I might have missed some basic thing here.=20 > =20 > =20 > Thanks=20 > Santosh P K=20 > =20 > From: MALLIK MUDIGONDA (mmudigon) [mailto:mmudigon@cisco.com]=20 > Sent: Friday, July 17, 2015 10:45 AM > To: Santosh P K; S. Davari > Cc: peng.shaofu@zte.com.cn; rtg-bfd@ietf.org > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 > =20 > Hi,=20 > =20 > The question is even with LSP ping, how to de-mutiplex if all the paramete= rs are the same. That=E2=80=99s where the source address comes into picture.= =20 > =20 > Thanks=20 > =20 > Regards=20 > Mallik=20 > =20 > From: Santosh P K > Date: Friday, 17 July 2015 10:21 > To: "S. Davari" > Cc: "peng.shaofu@zte.com.cn" , Mallik Mudigonda , "rtg-bfd@ietf.org" > Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 > =20 > Sharam,=20 > True but here it is 5884 and for 5884 (MPLS BFD) we do bootstrapping us= ing LSP ping and that exchange discr right? So you should ideally not receiv= e any BFD packet with your_disc =3D 0.=20 > =20 > Thanks=20 > Santosh P K=20 > =20 > From: S. Davari [mailto:davarish@yahoo.com]=20 > Sent: Friday, July 17, 2015 9:51 AM > To: Santosh P K > Cc: peng.shaofu@zte.com.cn; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 > =20 > Hi Santosh=20 > =20 > I think the issue is the first BFD packet that has your Desc =3D0. Questio= n is how to differentiate them when they are from different ingress LSR.=20 >=20 > Regards,=20 > Shahram=20 > =20 >=20 > On Jul 16, 2015, at 8:48 PM, Santosh P K wrote:=20= > Hello Deccan, MALLIK and Shahram,=20 > I want to understand why do we need this? When BFD bootstrapping is c= ompleted then we use local discr (BFD packet your discr) as a key which will= be unique with in the local system. Please take a look at below section of R= FC 5880.=20 > =20 > https://tools.ietf.org/html/rfc5880#section-6.3=20 > =20 > We don=E2=80=99t need to really use any other fields as we would have exch= anged the discr using LSP ping. I might have misunderstood your question and= would like to be corrected.=20 > =20 > =20 > Thanks=20 > Santosh P K=20 > =20 > From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@z= te.com.cn > Sent: Thursday, July 16, 2015 1:00 PM > To: MALLIK MUDIGONDA (mmudigon) > Cc: rtg-bfd@ietf.org; S. Davari > Subject: =E7=AD=94=E5=A4=8D: Re: issues about draft-ietf-bfd-rfc5884-clari= fications-02=20 > =20 >=20 > Hi Mallik=20 >=20 > Source address is also a good method. But it is better to form as standard= . >=20 > thanks=20 >=20 >=20 >=20 >=20 > "MALLIK MUDIGONDA (mmudigon)" > 2015-07-16 =E4=B8=8B=E5=8D=88 02:16=20 >=20 > =20 > =E6=94=B6=E4=BB=B6=E4=BA=BA > "S. Davari" , "peng.shaofu@zte.com.cn" > =E6=8A=84=E9=80=81 > "rtg-bfd@ietf.org" > =E4=B8=BB=E9=A2=98 > Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 >=20 > =20 > =20 >=20 >=20 >=20 >=20 >=20 > Hi,=20 >=20 > I think the question is 2 different ingress LSRs using the same FEC, LSP, D= iscriminator values. Discriminator values can be the same for 2 different in= gress LSRs and if the other values are same we can always use the Source add= ress to differentiate. Am I missing something? >=20 > Regards=20 > Mallik=20 >=20 > From: "S. Davari" > Date: Wednesday, 15 July 2015 20:12 > To: "peng.shaofu@zte.com.cn" > Cc: "rtg-bfd@ietf.org" > Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02=20 >=20 > Hi=20 >=20 > Why can't the ingress allocate different LD to each of those BFD sessions?= >=20 > Regards,=20 > Shahram=20 >=20 >=20 > On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" wrote: >=20 >=20 > hi authors >=20 > It is neccessary to address the case that different ingress LSR establish B= FD session with the same egress LSR, with same FEC, same local descriminator= . > I think it is very useful to introduce a BFD Initiator TLV to LSP ping ech= o request message, to distinguish different ingress LSR. So that ingress all= ocate LD based on tuple as defined in this draft, but egress allo= cate LD based on tuple . >=20 > thanks=20 > deccan=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 >=20 >=20 >=20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= >=20 >=20 >=20 >=20 >=20 > =20 > --------------------------------------------------------=20 > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= =20 > =20 > =20 >=20 > =20 > -------------------------------------------------------- > ZTE Information Security Notice: The information contained in this mail (a= nd any attachment transmitted herewith) is privileged and confidential and i= s intended for the exclusive use of the addressee(s). If you are not an int= ended recipient, any disclosure, reproduction, distribution or other dissemi= nation or use of the information contained is strictly prohibited. If you h= ave received this mail in error, please delete it and notify us immediately.= > =20 > =20 --Apple-Mail-DAB4D379-500E-4C35-A490-4B45B7A8FD60 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Agree.

Regards,
Shahram


On Jul 18, 2015, at 3:02 AM, Gregory Mirsky &= lt;gregory.mirsky@ericsson.co= m> wrote:

Hi Shahram,

but mp2p with IP/UDP encaps= ulation of BFD session would not have the problem either if it will use LSP P= ing bootstrap because source IP addresses, I expect, would be different. After bootstrap demultiplexing will be by Your Discrimi= nator for each p2p BFD session of the same mp2p LSP. Would you agree?

 

    &nb= sp;           Regards,

    &nb= sp;            &= nbsp;            = ;  Greg

 

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of S. Davari
Sent: Friday, July 17, 2015 9:15 AM
To: peng.shaofu@zte.com.cn<= /a>
Cc: rtg-bfd@ietf.org
Subject: Re: =E7=AD=94=E5=A4=8D: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02

 

Peng

 

I think you are assuming mp2p LSP. Since for P2P = ;

LSP we won't have this problem. Right?

=


Regards,

Shahram

 


On Jul 17, 2015, at 12:03 AM, peng= .shaofu@zte.com.cn wrote:


Hi Santosh

For example, there are two diferrent ingress (LSR1 & LSR2) wan= t to establish BFD session with the same egress (LSR3) for same FEC (3.3.3.9= /32). PLease see the following steps.

step1: LSR1 construct an LSP echo request message, including LSR1-= LD (100) and FEC (3.3.3.9/32)
step2: LSR3 received the echo request message, if FEC validation c= heck succeed, it will NEW a BFD entity, allocate LSR3-LD (200) based on tupl= e <FEC, LSR1-LD>.
       Now LSR3 can send a BFD control packet w= ith MD=3D200 YD=3D100.
step3: LSR2 also construct an LSP echo request message, including L= SR2-LD (100) and FEC (3.3.3.9/32)
step4: LSR3 received the echo request message, if FEC validation c= heck succeed, it will match to the above already existing BFD session, becau= se tuple <FEC, LSR2-LD> equal <FEC, LSR1-LD>

thanks
Deccan


Santosh P K <santoshpk@juniper.net>

2015-07-17 =E4=B8=8B=E5= =8D=88 01:27

=E6=94=B6=E4=BB=B6=E4= =BA=BA

"MALLIK MUDIGONDA (mmudigon)" <mmudigon@cisco.com>, "S. Davari" <davarish@yahoo.com>

=E6=8A=84=E9=80=81

"p= eng.shaofu@zte.com.cn" <pen= g.shaofu@zte.com.cn>, "rtg-bfd@ie= tf.org" <rtg-bfd@ietf.org>

=E4=B8=BB=E9=A2=98<= /p>

RE: issues about draft-ietf-bfd-rfc5884-clar= ifications-02

 




Mallik,
   When a BFD packet is received with yo= ur_disc as non-zero then we use only that as demux entity. Your_discr is a v= alue allocated by local router and should be unique across the system. So where is the question of having any other field to be used as de= mux? Are you talking about same discr for BFD session for same LSP in case o= f ECMP? Can you please explain more in detail what is the scenario? I might h= ave missed some basic thing here.
 
 
Thanks
Santosh P K
 
From: MALLIK MUDIGONDA (mmudigon) [mailto:mmudigon@cisco.com]
Sent: Friday, July 17, 2015 10:45 AM
To: Santosh P K; S. Davari
Cc: peng.shaofu@zte.com.cn= ; rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Hi,
 
The question is even with LSP ping, how to de-mutiplex if all th= e parameters are the same. That=E2=80=99s where the source address comes int= o picture.
 
Thanks
 
Regards
Mallik
 
From: Santosh P K <santoshpk@juniper.net>
Date: Friday, 17 July 2015 10:21
To: "S. Davari" <davarish@yahoo.com>
Cc: "peng.s= haofu@zte.com.cn" <peng.shaofu@zte.com.cn&g= t;, Mallik Mudigonda <mmudigon@cisco.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org= >
Subject: RE: issues about draft-ietf-bfd-rfc5884-clarifications-02
 
Sharam,
   True but here it is 5884 and for 5884= (MPLS BFD) we do bootstrapping using LSP ping and that exchange discr right= ? So you should ideally not receive any BFD packet with your_disc =3D 0.
 
Thanks
Santosh P K
 
From: S. Davari [mailto:davarish@yahoo.com]
Sent: Friday, July 17, 2015 9:51 AM
To: Santosh P K
Cc: peng.sh= aofu@zte.com.cn; MALLIK MUDIGONDA (mmudigon); rtg-bfd@ietf.org
Subject: Re: issues about draft-ietf-bfd-rfc5884-clar= ifications-02
 
Hi Santosh
 
I think the issue is the first BFD packet= that has your Desc =3D0. Question is how to differentiate them when they ar= e from different ingress LSR.

Regards,
Shahram
 

On Jul 16, 2015, at 8:48 PM, Santosh P K <santoshpk@juniper.net> wrote:
Hello Deccan, MALLIK and Shahram,
     I want to understand why do we= need this? When BFD bootstrapping is completed then we use local discr (BFD= packet your discr) as a key which will be unique with in the local system. Please take a look at below section of RFC 5880.
 
http= s://tools.ietf.org/html/rfc5880#section-6.3
 
We don=E2=80=99t need to really use any other fiel= ds as we would have exchanged the discr using LSP ping. I might have misunde= rstood your question and would like to be corrected.
 
 
Thanks
Santosh P K
 
From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of peng.shaofu@zte.com.cn
Sent: Thursday, July 16, 2015 1:00 PM
To: MALLIK MUDIGONDA (mmudigon)
Cc: rtg-bfd@ietf.= org; S. Davari
Subject: =E7=AD= =94=E5=A4=8D: Re: issues about draft-ietf-bfd-rfc5884-cla= rifications-02
 

Hi Mallik

Source address is also a good method. But it is better to form as standard.<= /span>

thanks



"MALLIK MUDIGONDA (mmudigon)" <= mmudigon@cisco.com>

2015-07-16 =E4=B8=8B=E5=8D=88= 02:16

 

=E6=94=B6=E4=BB=B6=E4=BA=BA<= o:p>

"S. Davari" <davarish@yahoo.com>, "peng.shaofu@zte.= com.cn" <peng.shaofu@zte.com.cn>

=E6=8A=84=E9=80=81

"= rtg-bfd@ietf.org" <rtg-bfd@ietf.org>

=E4=B8=BB=E9=A2=98

Re: issues about draft-ietf-bfd-rfc5884-clar= ifications-02


 

 





Hi,

I think the question is 2 different ingress LSRs using the same FEC, LSP, Di= scriminator values. Discriminator values can be the same for 2 different ing= ress LSRs and if the other values are same we can always use the Source addr= ess to differentiate. Am I missing something?

Regards
Mallik

From: "S. Davari" <davarish@yahoo.com> Date: Wednesday, 15 July 2015 20:12
To: "peng.s= haofu@zte.com.cn" <peng.shaofu@zte.com.cn&g= t;
Cc: "rtg-bfd@ietf= .org" <= rtg-bfd@ietf.org>
Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

Hi

Why can't the ingress allocate different LD to each of those BFD sessions?
Regards,
Shahram


On Jul 15, 2015, at 7:30 AM, "peng.shaofu@zte.com.cn" <peng.shaofu@zte.com.cn> wrote:


hi authors

It is neccessary to address the case that different ingress LSR establish BFD= session with the same egress LSR, with same FEC, same local descriminator.<= br> I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo r= equest message, to distinguish different ingress LSR. So that ingress alloca= te LD based on tuple <FEC, LSP> as defined in this draft, but egress a= llocate LD based on tuple <Initiator, FEC, RD>.

thanks
deccan


--------------------------------------------------------
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--------------------------------------------------------
ZTE Information Security Notice: The information contained in this mail (and= any attachment transmitted herewith) is privileged and confidential and is i= ntended for the exclusive use of the addressee(s).  If you are not an i= ntended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information= contained is strictly prohibited.  If you have received this mail in e= rror, please delete it and notify us immediately.





 
------------------------------= --------------------------
ZTE Information Security Notic= e: The information contained in this mail (and any attachment transmitted he= rewith) is privileged and confidential and is intended for the exclusive use= of the addressee(s).  If you are not an intended recipient, any disclosure, reproduction, distribution or ot= her dissemination or use of the information contained is strictly prohibited= .  If you have received this mail in error, please delete it and notify= us immediately.
 
  

 
--------------------------------------------=
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ZTE Information Security Notice: The informa=
tion contained in this mail (and any attachment transmitted herewith) is pri=
vileged and confidential and is intended for the exclusive use of the addres=
see(s).  If you are not an intended recipient, any disclosure, reproduc=
tion, distribution or other dissemination or use of the information containe=
d is strictly prohibited.  If you have received this mail in error, ple=
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= --Apple-Mail-DAB4D379-500E-4C35-A490-4B45B7A8FD60-- From nobody Thu Jul 30 13:04:45 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C27381ACE21 for ; Thu, 30 Jul 2015 13:04:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.578 X-Spam-Level: X-Spam-Status: No, score=-1.578 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, IP_NOT_FRIENDLY=0.334, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=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 Fy17msb4qIrn for ; Thu, 30 Jul 2015 13:04:43 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 0B2DF1ACD49 for ; Thu, 30 Jul 2015 13:04:43 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id A6C311E379; Thu, 30 Jul 2015 16:06:57 -0400 (EDT) Date: Thu, 30 Jul 2015 16:06:57 -0400 From: Jeffrey Haas To: "Carlos Pignataro (cpignata)" Subject: Re: S-BFD Documents Progress? Message-ID: <20150730200657.GA16799@pfrc.org> References: <4597F9B4-6D67-44E7-95CC-5DAB9A2E839E@cisco.com> <20150710143220.GI13783@pfrc.org> <9FA4E635-84E5-400B-9522-453BA95CD856@cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9FA4E635-84E5-400B-9522-453BA95CD856@cisco.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: Cc: "rtg-bfd@ietf.org" , "bfd-chairs@tools.ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 30 Jul 2015 20:04:43 -0000 On Fri, Jul 10, 2015 at 06:30:03PM +0000, Carlos Pignataro (cpignata) wrote: > > > On Jul 10, 2015, at 10:32 AM, Jeffrey Haas wrote: > > > >> What is the target timeline for submitting these to the IESG? > > > > Likely the next day or so. > > Thank you, Jeff! True to my general nature, my days follow the timelines that many software developers mean when they say "just a few days". In other words, the caveat is, "when I can work on that without interruption". Such a precious illusion. With apologies to the Working Group, I've completed the document shepherd writeup for the S-BFD document set and have submitted the drafts for IESG publication. One minor issue was noted during the writeup - that being the normative reference on a spring document that still hasn't been accepted as a working group document in spring. Based on how this use case is being used to support a particular use case in Seamless BFD, a normative reference is appropriate. However, since both documents are targeted for Informational status, an Informative reference may be similarly appropriate. The authors of Seamless BFD should consider whether a change in status may be appropriate as it would remove an obstacle to publication as an RFC. -- Jeff From nobody Thu Jul 30 13:16:58 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 051161ACE56 for ; Thu, 30 Jul 2015 13:16:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.578 X-Spam-Level: X-Spam-Status: No, score=-1.578 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, IP_NOT_FRIENDLY=0.334, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=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 TFAT4Q086ahE for ; Thu, 30 Jul 2015 13:16:55 -0700 (PDT) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 351951ACE53 for ; Thu, 30 Jul 2015 13:16:55 -0700 (PDT) Received: by slice.pfrc.org (Postfix, from userid 1001) id E1B361E37A; Thu, 30 Jul 2015 16:19:09 -0400 (EDT) Date: Thu, 30 Jul 2015 16:19:09 -0400 From: Jeffrey Haas To: rtg-bfd@ietf.org Subject: BFD Yang working group adoption Message-ID: <20150730201909.GC16799@pfrc.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 30 Jul 2015 20:16:56 -0000 This is to announce the intent to adopt the work by the BFD Yang design team as a BFD Working Group document. This work is already in scope of our charter. https://datatracker.ietf.org/doc/draft-zheng-bfd-yang/ Per discussion with the team, we believe the draft is good enough shape to start to involve broader Working Group participation in this process. The design team may continue regularly meeting, but should plan on making the general Working Group aware of your sessions. Authors, please re-submit your draft as draft-ietf-bfd-yang. Also, please continue current discussion of the draft on the Working Group mailing list. Congratulations on fine work. -- Jeff and Nobo From nobody Thu Jul 30 15:34:16 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 987FE1ACF60 for ; Thu, 30 Jul 2015 15:34:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 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, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham 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 7ubhouBU6WnP for ; Thu, 30 Jul 2015 15:34:12 -0700 (PDT) Received: from alln-iport-7.cisco.com (alln-iport-7.cisco.com [173.37.142.94]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 99DE31ACF1D for ; Thu, 30 Jul 2015 15:34:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=8354; q=dns/txt; s=iport; t=1438295652; x=1439505252; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=gx1yh2PVtMRCrst8q0rW1bkcq5ipKygyMwnneTiAXtw=; b=W4+5hSXksq0eL9j37EQdN+r3fAb4kPxDhaIGDfK2dIkRPBn0GpN9R/k5 9rk+PFm3UDDyV0Xg8MgCK7dPYhubdF96MjvA0zoKF/hfVMiHpRlgtVqKz FeQkIeGir9OWYr7y3pXOqM/qi/ah8xxU+zH/TnrqgXXZnJ2FNOXTJHLLJ w=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0ChAwBIpbpV/4MNJK1cgxpUabwlCYIFgkGDNgKBQDgUAQEBAQEBAYEKhCQBAQR5EAIBCA4xBzIUEQIEDgWILg3FTQEBAQEBAQEBAQEBAQEBAQEBAQEBARMEi06FAwQHgxiBFAWRdYMCAYR6h06ZOSaDfW+CTAEBAQ X-IronPort-AV: E=Sophos;i="5.15,579,1432598400"; d="scan'208,217";a="173975688" Received: from alln-core-1.cisco.com ([173.36.13.131]) by alln-iport-7.cisco.com with ESMTP; 30 Jul 2015 22:34:11 +0000 Received: from xhc-aln-x11.cisco.com (xhc-aln-x11.cisco.com [173.36.12.85]) by alln-core-1.cisco.com (8.14.5/8.14.5) with ESMTP id t6UMYBhB006940 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 30 Jul 2015 22:34:11 GMT Received: from xmb-aln-x02.cisco.com ([169.254.5.220]) by xhc-aln-x11.cisco.com ([173.36.12.85]) with mapi id 14.03.0195.001; Thu, 30 Jul 2015 17:34:11 -0500 From: "Carlos Pignataro (cpignata)" To: Jeffrey Haas Subject: Re: S-BFD Documents Progress? Thread-Topic: S-BFD Documents Progress? Thread-Index: AQHQurLw6gou2NBJlU69ARd2UlxkWZ3VGOAAgABCbYCAH4mxgP//1VK5 Date: Thu, 30 Jul 2015 22:34:11 +0000 Message-ID: References: <4597F9B4-6D67-44E7-95CC-5DAB9A2E839E@cisco.com> <20150710143220.GI13783@pfrc.org> <9FA4E635-84E5-400B-9522-453BA95CD856@cisco.com>, <20150730200657.GA16799@pfrc.org> In-Reply-To: <20150730200657.GA16799@pfrc.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: multipart/alternative; boundary="_000_A47695085A484A49B6B918ED83AC3454ciscocom_" MIME-Version: 1.0 Archived-At: Cc: "rtg-bfd@ietf.org" , "bfd-chairs@tools.ietf.org" X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 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, 30 Jul 2015 22:34:14 -0000 --_000_A47695085A484A49B6B918ED83AC3454ciscocom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable On Jul 30, 2015, at 22:04, Jeffrey Haas > wrote: On Fri, Jul 10, 2015 at 06:30:03PM +0000, Carlos Pignataro (cpignata) wrote= : On Jul 10, 2015, at 10:32 AM, Jeffrey Haas > wrote: What is the target timeline for submitting these to the IESG? Likely the next day or so. Thank you, Jeff! True to my general nature, my days follow the timelines that many software developers mean when they say "just a few days". In other words, the cavea= t is, "when I can work on that without interruption". Such a precious illusion. With apologies to the Working Group, I've completed the document shepherd writeup for the S-BFD document set and have submitted the drafts for IESG publication. One minor issue was noted during the writeup - that being the normative reference on a spring document that still hasn't been accepted as a working group document in spring. Based on how this use case is being used to support a particular use case in Seamless BFD, a normative reference is appropriate. However, since both documents are targeted for Informational status, an Informative reference may be similarly appropriate. I agree that an Informative reference is appropriate in this case, although= either Normative or Informative can easily be argued. The authors of Seamless BFD should consider whether a change in status may be appropriate as it would remove an obstacle to publication as an RFC. My preference would be to move this reference to Informative. Also, in scanning through the draft, I noticed a set of additional minor is= sues: "2. Introduction to Seamless BFD BFD, as defined in standard [RFC5880], requires two network nodes, to exchange locally allocated discriminators. The discriminator enables identification of the sender and receiver of BFD packets of the particular session and proactive continuity monitoring of the forwarding path between the two. [RFC5881] defines single hop BFD whereas [RFC5883] and [RFC5884] defines multi-hop BFD." In the text above, I see the following issues: 1. BFD is not a "standard", it's PS. I'd just remove "standard". 2. RFC 5884 does not define multi hop (5883 does), it defines BFD for MPLS = LSPs 3. RFC 5885 (BFD for PWs) is missing. Thanks, Carlos. -- Jeff --_000_A47695085A484A49B6B918ED83AC3454ciscocom_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

On Jul 30, 2015, at 22:04, Jeffrey Haas <jhaas@pfrc.org> wrote:

On Fri, Jul 10, 2015 at 06:30:03PM +0000, Carlos Pignataro (= cpignata) wrote:

On Jul 10, 2015, at 10:32 AM, Jeffrey Haas = <jhaas@pfrc.org> wrote:<= br>

What is the target timeline for submitting = these to the IESG?

Likely the next day or so.

Thank you, Jeff!

True to my general nature, my days follow the timelines that many sof= tware
developers mean when they say "just a few days".  In o= ther words, the caveat
is, "when I can work on that without interruption". =

Such a precious illusion.

With apologies to the Working Group, I've completed the document shep= herd
writeup for the S-BFD document set and have submitted the drafts for = IESG
publication.

One minor issue was noted during the writeup - that being the normati= ve
reference on a spring document that still hasn't been accepted as a w= orking
group document in spring.  Based on how this use case is being u= sed to
support a particular use case in Seamless BFD, a normative reference = is
appropriate.  However, since both documents are targeted for Inf= ormational
status, an Informative reference may be similarly appropriate.=


I agree that an Informative reference is appropriate in this case, alt= hough either Normative or Informative can easily be argued. 

The authors of Seamless BFD should consider whether a change in = status may
be appropriate as it would remove an obstacle to publication as an RF= C.


My preference would be to move this reference to Informative.
 
Also, in scanning through the draft, I noticed a set of additional min= or issues:

"2.  Introduction to Seamless BFD


   BFD, as defined in standard [RFC5880=
], requires two network nodes, to
   exchange locally allocated discriminators.  The discriminator enables
   identification of the sender and receiver of BFD packets of the
   particular session and proactive continuity monitoring of the
   forwarding path between the two.  [RFC5881] defines single hop BFD
   whereas [RFC5883<=
/a>] and [RFC5884] defines multi-hop BFD."

In the text above, I see the following issues:
1. BFD is not a "standard", it's PS. I'd just remove "s= tandard". 
2. RFC 5884 does not define multi hop (5883 does), it defines BFD for = MPLS LSPs
3. RFC 5885 (BFD for PWs) is missing. 

Thanks,

Carlos. 

-- Jeff
--_000_A47695085A484A49B6B918ED83AC3454ciscocom_-- From nobody Fri Jul 31 09:20:18 2015 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 29AED1B2DB4; Fri, 31 Jul 2015 09:20:14 -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] autolearn=ham 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 qc8qMVlN59tu; Fri, 31 Jul 2015 09:20:10 -0700 (PDT) Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id EFC541B2DB9; Fri, 31 Jul 2015 09:20:09 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Subject: I-D Action: draft-ietf-bfd-seamless-use-case-03.txt X-Test-IDTracker: no X-IETF-IDTracker: 6.2.0.p3 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20150731162009.20931.50163.idtracker@ietfa.amsl.com> Date: Fri, 31 Jul 2015 09:20:09 -0700 Archived-At: Cc: rtg-bfd@ietf.org X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.15 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 31 Jul 2015 16:20:14 -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 Working Group of the IETF. Title : Seamless Bidirectional Forwarding Detection (BFD) Use Case Authors : Sam Aldrin Manav Bhatia Satoru Matsushima Greg Mirsky Nagendra Kumar Filename : draft-ietf-bfd-seamless-use-case-03.txt Pages : 10 Date : 2015-07-31 Abstract: This document provides various use cases for Bidirectional Forwarding Detection (BFD) such that extensions could be developed to allow for simplified detection of forwarding failures. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-bfd-seamless-use-case/ There's also a htmlized version available at: https://tools.ietf.org/html/draft-ietf-bfd-seamless-use-case-03 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-seamless-use-case-03 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/