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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Adrian Farrel <adrian@olddog.co.uk>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "draft-ietf-idr-bgpls-srv6-ext.all@ietf.org" <draft-ietf-idr-bgpls-srv6-ext.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
Thread-Index: AQHXVNBrwCpZivHRgUqYKOXpCmUudqr/PsZw
Date: Tue, 1 Jun 2021 14:42:15 +0000
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References: <162232320026.7852.16606328132879450829@ietfa.amsl.com>
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Adrian Farrel <adrian@olddog.co.uk>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "draft-ietf-idr-bgpls-srv6-ext.all@ietf.org" <draft-ietf-idr-bgpls-srv6-ext.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
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Date: Tue, 8 Jun 2021 19:14:18 +0000
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
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To: "'Ketan Talaulikar \(ketant\)'" <ketant@cisco.com>, <rtg-dir@ietf.org>
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
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Hi Ketan,

Thanks for the detailed response, it really helps cross-check the =
review.

There are a few residual comments/suggestions below with everything else =
snipped out.

None of these remaining points merits a response: either touch the =
document or ignore the email =F0=9F=98=8A

Best,
Adrian

=3D=3D Minor Issues =3D=3D

You will need to reduce the number of front-page authors to five or =
fewer, or you will need to provide the document shepherd with a credible =
reason to diverge from this rule.

[AF] I assume, from no change to the document, that you will be giving =
the shepherd some reasoning for them to use in the write-up.

---

Section 1

   On the similar lines,
   introducing the SRv6 related information in BGP-LS allows consumer
   applications that require topological visibility to also receive the
   SRv6 SIDs from nodes across a domain or even across Autonomous
   Systems (AS), as required.

I caution you to be *very* careful with the word "domain". The IESG has =
recently been concerned by the definition contained in 8402. In that =
document, the "SR domain" (also just "domain") is the collection of all =
interconnected SR-capable nodes. Here (and in other parts of the
document) I think you are using "domain" in a more restricted sense. I =
don't know how you fix that, but I believe you should do something.
Perhaps you can call out the terminology issues here by noting the 8402 =
definition and specifically defining what you mean by your local =
definition of "domain".
[KT] The "domain" is "IGP domain" in this context and this is fixed.

[AF] I still see Section 11 "(e.g., between multiple AS/domains within a =
single provider network)". I think that use of "domain" needs =
qualification as well.

---

Section 2

   The SRv6 SIDs associated with the node are advertised using the BGP-
   LS SRv6 SID NLRI introduced in this document.  This enables the BGP-
   LS encoding to scale to cover a potentially large set of SRv6 SIDs
   instantiated on a node with the granularity of individual SIDs and
   without affecting the size and scalability of the BGP-LS updates.

The claims of scalability are not expanded here or anywhere else in the =
document. Scalability of BGP-LS is important, so I'd prefer some =
explanation. But if that isn't available, it might be better to leave =
out these mentions.
[KT] Advertisement of large number of SRv6 SIDs as part of the BGP-LS =
Link Attribute associated with the existing Node NLRI would make that =
BGP-LS update rather large. Using the new separate SRv6 SID NLRI =
alleviates the problem. This is the scalability consideration for the =
protocol encoding design. I am not sure what further details are =
required.

[AF] Well, just a few words to help clarify using some of your words =
here.
Advertisement of large number of SRv6 SIDs as part of the BGP-LS Link =
Attribute associated with the existing Node NLRI could make that BGP-LS =
update rather large, causing scaling concerns as the number of SRv6 SIDs =
instantiated on a node. The SRv6 SID NLRI introduced in this document =
alleviates this problem by <doing what?>"

---

[snip]

---

7.1

   The SRv6 Endpoint Behavior TLV is a mandatory TLV that MUST be
   included in the BGP-LS Attribute associated with the BGP-LS SRv6 SID
   NLRI. =20

What if it is missing?
[KT] The consumer of the BGP-LS information would not be able to use =
this information. The BGP-LS speakers themselves do not perform semantic =
validation for the TLVs per RFC7752 and this is clarified further in the =
draft-ietf-idr-rfc7752bis.

[AF] A fine answer, and the text can be enhanced with a quick pointer to =
7752 (or the bis, but you probably want a normative reference and 752 =
will do the job) saying "Processing and validation rules for BGP-LS TLVs =
are described in [RFC7752]." Do this in the right place and it covers =
all issues.

---

[snip]

=3D=3D Nits =3D=3D

[snip]

4.1, 4.2, 5.1, and 6.1

Can you say what the Length field is. "The length of the value part of =
the TLV in bytes including any sub-TLVs that may be present." ??
[KT] This is base BGP-LS encoding. I don't think we need to repeat it =
for each TLV that is defined.

[AF] Can you then add (probably in Section 2) to say this? Something =
like...
OLD
   BGP-LS Attribute TLVs for the SRv6 SID NLRI are
   introduced in this document as follows:
NEW
   BGP-LS Attribute TLVs for the SRv6 SID NLRI are
   introduced in this document as follows.  These new TLVs follow the
   formats and common field definitions provided in [RFC7752].
END

---

[snip]

---

6.

The figure has
    |                        Identifier                             |
    |                        (64 bits)                              |
and the text has
   o  Identifier: 8 octet value as defined in [RFC7752].

Be consistent?
[KT] Not sure that I follow - 8 octets =3D 64 bits. We've tried to keep =
the figure aligned with RFC7752. While this document describes fields in =
terms of octets - so it is consistent.

[AF] Consistent would be to always say "8 octets" or always say "64 =
bits"

---

[snip]



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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Ketan Talaulikar \(ketant\)'" <ketant@cisco.com>, <rtg-dir@ietf.org>
Cc: <draft-ietf-idr-bgpls-srv6-ext.all@ietf.org>, <idr@ietf.org>
References: <162232320026.7852.16606328132879450829@ietfa.amsl.com> <MW3PR11MB45704BADF4A30DFEBA6A7B69C1379@MW3PR11MB4570.namprd11.prod.outlook.com>
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Date: Wed, 9 Jun 2021 09:56:06 +0100
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
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Hi Ketan,

Thanks for the detailed response, it really helps cross-check the =
review.

There are a few residual comments/suggestions below with everything else =
snipped out.

None of these remaining points merits a response: either touch the =
document or ignore the email =F0=9F=98=8A

Best,
Adrian

=3D=3D Minor Issues =3D=3D

You will need to reduce the number of front-page authors to five or =
fewer, or you will need to provide the document shepherd with a credible =
reason to diverge from this rule.

[AF] I assume, from no change to the document, that you will be giving =
the shepherd some reasoning for them to use in the write-up.

---

Section 1

   On the similar lines,
   introducing the SRv6 related information in BGP-LS allows consumer
   applications that require topological visibility to also receive the
   SRv6 SIDs from nodes across a domain or even across Autonomous
   Systems (AS), as required.

I caution you to be *very* careful with the word "domain". The IESG has =
recently been concerned by the definition contained in 8402. In that =
document, the "SR domain" (also just "domain") is the collection of all =
interconnected SR-capable nodes. Here (and in other parts of the
document) I think you are using "domain" in a more restricted sense. I =
don't know how you fix that, but I believe you should do something.
Perhaps you can call out the terminology issues here by noting the 8402 =
definition and specifically defining what you mean by your local =
definition of "domain".
[KT] The "domain" is "IGP domain" in this context and this is fixed.

[AF] I still see Section 11 "(e.g., between multiple AS/domains within a =
single provider network)". I think that use of "domain" needs =
qualification as well.

---

Section 2

   The SRv6 SIDs associated with the node are advertised using the BGP-
   LS SRv6 SID NLRI introduced in this document.  This enables the BGP-
   LS encoding to scale to cover a potentially large set of SRv6 SIDs
   instantiated on a node with the granularity of individual SIDs and
   without affecting the size and scalability of the BGP-LS updates.

The claims of scalability are not expanded here or anywhere else in the =
document. Scalability of BGP-LS is important, so I'd prefer some =
explanation. But if that isn't available, it might be better to leave =
out these mentions.
[KT] Advertisement of large number of SRv6 SIDs as part of the BGP-LS =
Link Attribute associated with the existing Node NLRI would make that =
BGP-LS update rather large. Using the new separate SRv6 SID NLRI =
alleviates the problem. This is the scalability consideration for the =
protocol encoding design. I am not sure what further details are =
required.

[AF] Well, just a few words to help clarify using some of your words =
here.
Advertisement of large number of SRv6 SIDs as part of the BGP-LS Link =
Attribute associated with the existing Node NLRI could make that BGP-LS =
update rather large, causing scaling concerns as the number of SRv6 SIDs =
instantiated on a node. The SRv6 SID NLRI introduced in this document =
alleviates this problem by <doing what?>"

---

[snip]

---

7.1

   The SRv6 Endpoint Behavior TLV is a mandatory TLV that MUST be
   included in the BGP-LS Attribute associated with the BGP-LS SRv6 SID
   NLRI. =20

What if it is missing?
[KT] The consumer of the BGP-LS information would not be able to use =
this information. The BGP-LS speakers themselves do not perform semantic =
validation for the TLVs per RFC7752 and this is clarified further in the =
draft-ietf-idr-rfc7752bis.

[AF] A fine answer, and the text can be enhanced with a quick pointer to =
7752 (or the bis, but you probably want a normative reference and 752 =
will do the job) saying "Processing and validation rules for BGP-LS TLVs =
are described in [RFC7752]." Do this in the right place and it covers =
all issues.

---

[snip]

=3D=3D Nits =3D=3D

[snip]

4.1, 4.2, 5.1, and 6.1

Can you say what the Length field is. "The length of the value part of =
the TLV in bytes including any sub-TLVs that may be present." ??
[KT] This is base BGP-LS encoding. I don't think we need to repeat it =
for each TLV that is defined.

[AF] Can you then add (probably in Section 2) to say this? Something =
like...
OLD
   BGP-LS Attribute TLVs for the SRv6 SID NLRI are
   introduced in this document as follows:
NEW
   BGP-LS Attribute TLVs for the SRv6 SID NLRI are
   introduced in this document as follows.  These new TLVs follow the
   formats and common field definitions provided in [RFC7752].
END

---

[snip]

---

6.

The figure has
    |                        Identifier                             |
    |                        (64 bits)                              |
and the text has
   o  Identifier: 8 octet value as defined in [RFC7752].

Be consistent?
[KT] Not sure that I follow - 8 octets =3D 64 bits. We've tried to keep =
the figure aligned with RFC7752. While this document describes fields in =
terms of octets - so it is consistent.

[AF] Consistent would be to always say "8 octets" or always say "64 =
bits"

---

[snip]



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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "draft-ietf-idr-bgpls-srv6-ext.all@ietf.org" <draft-ietf-idr-bgpls-srv6-ext.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-idr-bgpls-srv6-ext-07
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From: "Sriram, Kotikalapudi (Fed)" <kotikalapudi.sriram@nist.gov>
To: Mach Chen <mach.chen@huawei.com>, Alexander Azimov <a.e.azimov@gmail.com>
CC: "draft-ietf-idr-bgp-open-policy.all@ietf.org" <draft-ietf-idr-bgp-open-policy.all@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
Thread-Topic: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-policy-15.txt
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/g6lvPdslEM781Jo14EsJ9ERYccM>
Subject: Re: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-policy-15.txt
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--_002_SA1PR09MB814231FB0B10E55ED328557B84369SA1PR09MB8142namp_
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

Hi Mach,=0A=
=0A=
Thanks for your patience. Alexander and I were able to complete the discuss=
ion between us. =0A=
=0A=
Please let us know if the following two proposed changes would adequately a=
ddress your comment:=0A=
=0A=
We added the following new paragraph in Section 5.1 (just before the OTC at=
tribute processing section (Sec. 6)):=0A=
=0A=
   In the case of a neighbor who doesn't participate, the BGP Role is=0A=
   configured unilaterally based on local knowledge of the peering=0A=
   relationship.  (Note: This applies only to the default non-strict=0A=
   mode; remember that in strict mode, the BGP connection is rejected=0A=
   for any non-participating neighbor.)  The only thing lacking would be=0A=
   a mutual confirmation with the neighbor about BGP Role (this is=0A=
   permissible for backward compatibility in partial deployment).  The=0A=
   OTC attribute processing (Section 6) remains unaffected.=0A=
=0A=
In the above, if you feel normative language should be used, then we can=0A=
s/BGP Role is configured unilaterally/BGP Role SHOULD be configured unilate=
rally/.=0A=
Please let us know. =0A=
=0A=
We made the following old text / new text substitution in Section 8:=0A=
=0A=
Old text:=0A=
   No Roles SHOULD be configured on a 'complex' BGP session (assuming it=0A=
   is not segregated) and in that case, OTC MUST be set by configuration=0A=
   on a per-prefix basis.  However, there are no built-in measures to=0A=
   check correctness of OTC use if BGP Role is not configured.=0A=
=0A=
New text:=0A=
   No Roles SHOULD be configured on a 'complex' BGP session (assuming it=0A=
   is not segregated) and in that case, the OTC attribute processing=0A=
   MUST be done relying on configuration on a per-prefix basis.  (Note:=0A=
   The per-prefix configuration of peering relationship is currently=0A=
   done to handle 'complex' BGP sessions.)  However, there are no built-=0A=
   in measures to check the correctness of OTC use if BGP Role is not=0A=
   configured.=0A=
=0A=
I've attached a diff file that highlights the above-proposed changes =0A=
and also the changes in response to your nits. We'll plan to upload =0A=
a new version -16 after we hear back from you on these proposed changes. =
=0A=
Thank you.=0A=
=0A=
Sriram=0A=
________________________________________=0A=
From: Mach Chen <mach.chen@huawei.com>=0A=
Sent: Saturday, May 29, 2021 4:03 AM=0A=
To: Alexander Azimov=0A=
Cc: draft-ietf-idr-bgp-open-policy.all@ietf.org; idr-chairs@ietf.org; idr@i=
etf.org; rtg-dir@ietf.org=0A=
Subject: RE: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-policy-=
15.txt=0A=
=0A=
Hi Alexander,=0A=
=0A=
Please see me response inline with [Mach]=0A=
=0A=
From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Alexander Azim=
ov=0A=
Sent: Saturday, May 29, 2021 4:05 AM=0A=
To: Mach Chen <mach.chen@huawei.com>=0A=
Cc: draft-ietf-idr-bgp-open-policy.all@ietf.org; idr-chairs@ietf.org; idr@i=
etf.org; rtg-dir@ietf.org=0A=
Subject: Re: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-policy-=
15.txt=0A=
=0A=
Dear Mach,=0A=
=0A=
Thank you for your comments, all nits are already applied.=0A=
=0A=
[Mach] OK.=0A=
=0A=
But it proved that different authors have a different reading of your comme=
nt related to section 6:=0A=
Section 6.=0A=
It does not specify how a speaker handle a route with OTC attribute but the=
 sender's role is unknown.=0A=
Are you speaking about the OTC processing in case of the absence of a local=
ly configured role?=0A=
Or does it about receiving OTC attribute from a neighbor that doesn't parti=
cipate in the role negotiation?=0A=
=0A=
[Mach] Actually, in both cases, the role of the peer is uncertain, if so wh=
at will the ingress policy and egress policy be? For example, regarding ing=
ress policy, how to handle a route with OTC attribute but not sure the send=
er=92s role. And regarding the egress policy, if the peer=92s role cannot b=
e determined, Whether the route should be sent to the peer? Should the OTC =
be kept?=0A=
=0A=
Best regards,=0A=
Mach=0A=
=0A=

--_002_SA1PR09MB814231FB0B10E55ED328557B84369SA1PR09MB8142namp_
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--_002_SA1PR09MB814231FB0B10E55ED328557B84369SA1PR09MB8142namp_--


From nobody Fri Jun 11 02:16:12 2021
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From: Mach Chen <mach.chen@huawei.com>
To: "Sriram, Kotikalapudi (Fed)" <kotikalapudi.sriram=40nist.gov@dmarc.ietf.org>, Alexander Azimov <a.e.azimov@gmail.com>
CC: "draft-ietf-idr-bgp-open-policy.all@ietf.org" <draft-ietf-idr-bgp-open-policy.all@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-policy-15.txt
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Date: Fri, 11 Jun 2021 09:15:50 +0000
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Subject: Re: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-policy-15.txt
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Hi, Sriram

Thanks for the update, it addressed my comments!

Best regards,
Mach

> -----Original Message-----
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Sriram, Kotikalapudi=
 (Fed)
> Sent: Thursday, June 10, 2021 12:09 AM
> To: Mach Chen <mach.chen@huawei.com>; Alexander Azimov
> <a.e.azimov@gmail.com>
> Cc: draft-ietf-idr-bgp-open-policy.all@ietf.org; idr-chairs@ietf.org;
> rtg-dir@ietf.org; idr@ietf.org
> Subject: Re: [Idr] [RTG-DIR] RtgDir Early review:
> draft-ietf-idr-bgp-open-policy-15.txt
>=20
> Hi Mach,
>=20
> Thanks for your patience. Alexander and I were able to complete the discu=
ssion
> between us.
>=20
> Please let us know if the following two proposed changes would adequately
> address your comment:
>=20
> We added the following new paragraph in Section 5.1 (just before the OTC
> attribute processing section (Sec. 6)):
>=20
>    In the case of a neighbor who doesn't participate, the BGP Role is
>    configured unilaterally based on local knowledge of the peering
>    relationship.  (Note: This applies only to the default non-strict
>    mode; remember that in strict mode, the BGP connection is rejected
>    for any non-participating neighbor.)  The only thing lacking would be
>    a mutual confirmation with the neighbor about BGP Role (this is
>    permissible for backward compatibility in partial deployment).  The
>    OTC attribute processing (Section 6) remains unaffected.
>=20
> In the above, if you feel normative language should be used, then we can =
s/BGP
> Role is configured unilaterally/BGP Role SHOULD be configured unilaterall=
y/.
> Please let us know.
>=20
> We made the following old text / new text substitution in Section 8:
>=20
> Old text:
>    No Roles SHOULD be configured on a 'complex' BGP session (assuming it
>    is not segregated) and in that case, OTC MUST be set by configuration
>    on a per-prefix basis.  However, there are no built-in measures to
>    check correctness of OTC use if BGP Role is not configured.
>=20
> New text:
>    No Roles SHOULD be configured on a 'complex' BGP session (assuming it
>    is not segregated) and in that case, the OTC attribute processing
>    MUST be done relying on configuration on a per-prefix basis.  (Note:
>    The per-prefix configuration of peering relationship is currently
>    done to handle 'complex' BGP sessions.)  However, there are no built-
>    in measures to check the correctness of OTC use if BGP Role is not
>    configured.
>=20
> I've attached a diff file that highlights the above-proposed changes and =
also the
> changes in response to your nits. We'll plan to upload a new version -16 =
after we
> hear back from you on these proposed changes.
> Thank you.
>=20
> Sriram
> ________________________________________
> From: Mach Chen <mach.chen@huawei.com>
> Sent: Saturday, May 29, 2021 4:03 AM
> To: Alexander Azimov
> Cc: draft-ietf-idr-bgp-open-policy.all@ietf.org; idr-chairs@ietf.org; idr=
@ietf.org;
> rtg-dir@ietf.org
> Subject: RE: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-polic=
y-15.txt
>=20
> Hi Alexander,
>=20
> Please see me response inline with [Mach]
>=20
> From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Alexander Az=
imov
> Sent: Saturday, May 29, 2021 4:05 AM
> To: Mach Chen <mach.chen@huawei.com>
> Cc: draft-ietf-idr-bgp-open-policy.all@ietf.org; idr-chairs@ietf.org; idr=
@ietf.org;
> rtg-dir@ietf.org
> Subject: Re: [RTG-DIR] RtgDir Early review: draft-ietf-idr-bgp-open-polic=
y-15.txt
>=20
> Dear Mach,
>=20
> Thank you for your comments, all nits are already applied.
>=20
> [Mach] OK.
>=20
> But it proved that different authors have a different reading of your com=
ment
> related to section 6:
> Section 6.
> It does not specify how a speaker handle a route with OTC attribute but t=
he
> sender's role is unknown.
> Are you speaking about the OTC processing in case of the absence of a loc=
ally
> configured role?
> Or does it about receiving OTC attribute from a neighbor that doesn't par=
ticipate
> in the role negotiation?
>=20
> [Mach] Actually, in both cases, the role of the peer is uncertain, if so =
what will the
> ingress policy and egress policy be? For example, regarding ingress polic=
y, how to
> handle a route with OTC attribute but not sure the sender's role. And reg=
arding
> the egress policy, if the peer's role cannot be determined, Whether the r=
oute
> should be sent to the peer? Should the OTC be kept?
>=20
> Best regards,
> Mach


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Reviewer: Joel Halpern
Review result: Has Issues

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing ADs.
For more information about the Routing Directorate, please see
​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it would
be helpful if you could consider them along with any other IETF Last Call
comments that you receive, and strive to resolve them through discussion or by
updating the draft.

Document: draft-name-version.txt
Reviewer: your-name
Review Date: date
IETF LC End Date: date-if-known
Intended Status: copy-from-I-D

Summary:
I have some minor concerns about this document that I think should be resolved
before publication.

Major Comments: N/A

Minor Comments:
    Reading section 3.1 on the rate for learning addresses, I am left guessing
    how the procedure is to be performed.  The text references RFC 2889 section
    5.8, but only for the meaning for the terms.  The test procedure is clearly
    different since that test relies on observing flooding.  As best I can
    guess, the test assumes that there is an observable (Netconf ? YANG ?)
    variable that reports how many local MAC addresses the device under test
    has learned.  It would be good to be more explicit about that, if possible
    pointing to the YANG module that defines the parameter to be observed.
  A similar clarification would be helpful on section 3.2 (on control plane MAC
  learning). It probably would be helpful if sections 3.3 and 3.4 then
  referenced sections 3.1 and 3.2 respectively for what is being observed. This
  probably applies to section 4 as well.  If the same variables are to be used,
  then a simple reference to the earlier description would seem to suffice.

  I believe that section 3.8 on high availability is intended to cause a switch
  of traffic path from DUT to MHPE2.   However, the text in that section never
  refers to MHPE 2.  It refers to switch of routing processor.  It is possible
  that this is intended to be a redundancy test within DUT.  If so, it would
  help to be more explicit, since as far as I know we do not standardize that
  behavior.

I am left puzzled as to the need for MHPE2 in these tests.  I assume there is
some obvious and simple reason for including it that I missed.  Could you add
an explanation?

Nits:
    At the end of section 2, the text reads "The X is used as variable..." 
    Could you change that to "The X below is used as a variable ..."?  I spent
    some time looking backwards for the X.

  The equation at the end of section 3.9 (ARD / ND scaling) is somewhat
  misleading.  It uses the same v1, v2, ..vn in successive lines to implicitly
  refer to the IPv4 measurements and the IPv6 measurements.  It would be good
  to name these separately, as obviously the same calculation can not produce
  two different results.



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Hi Joel,

Thank you for the comments. Appreciate it. Kindly find the answers inline and the modification will be done shortly, I will update the new version in a couple of days.

Regards,
Sudhin

From: bmwg-request@ietf.org
Sent: Thu, 17 Jun 2021 00:31:11
To: bmwg@ietf.org
Subject: bmwg Digest, Vol 200, Issue 6

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Today&#39;s Topics:

&nbsp; 1. Rtgdir last call review of draft-ietf-bmwg-evpntest-08
&nbsp; &nbsp; &nbsp;(Joel Halpern via Datatracker)


----------------------------------------------------------------------

Message: 1
Date: Wed, 16 Jun 2021 11:59:12 -0700
From: Joel Halpern via Datatracker &lt;noreply@ietf.org&gt;
To: &lt;rtg-dir@ietf.org&gt;
Cc: bmwg@ietf.org, draft-ietf-bmwg-evpntest.all@ietf.org,
&nbsp;&nbsp;&nbsp;last-call@ietf.org
Subject: [bmwg] Rtgdir last call review of draft-ietf-bmwg-evpntest-08
Message-ID: &lt;162386995210.13675.8048702439794738383@ietfa.amsl.com&gt;
Content-Type: text/plain; charset=&quot;utf-8&quot;

Reviewer: Joel Halpern
Review result: Has Issues

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing ADs.
For more information about the Routing Directorate, please see
?http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it would
be helpful if you could consider them along with any other IETF Last Call
comments that you receive, and strive to resolve them through discussion or by
updating the draft.

Document: draft-name-version.txt
Reviewer: your-name
Review Date: date
IETF LC End Date: date-if-known
Intended Status: copy-from-I-D

Summary:
I have some minor concerns about this document that I think should be resolved
before publication.

Major Comments: N/A

Minor Comments:
&nbsp; &nbsp;Reading section 3.1 on the rate for learning addresses, I am left guessing
&nbsp; &nbsp;how the procedure is to be performed. &nbsp;The text references RFC 2889 section
&nbsp; &nbsp;5.8, but only for the meaning for the terms. &nbsp;The test procedure is clearly
&nbsp; &nbsp;different since that test relies on observing flooding. &nbsp;As best I can
&nbsp; &nbsp;guess, the test assumes that there is an observable (Netconf ? YANG ?)
&nbsp; &nbsp;variable that reports how many local MAC addresses the device under test
&nbsp; &nbsp;has learned. &nbsp;It would be good to be more explicit about that, if possible
&nbsp; &nbsp;pointing to the YANG module that defines the parameter to be observed.
&nbsp;A similar clarification would be helpful on section 3.2 (on control plane MAC
&nbsp;learning). It probably would be helpful if sections 3.3 and 3.4 then
&nbsp;referenced sections 3.1 and 3.2 respectively for what is being observed. This
&nbsp;probably applies to section 4 as well. &nbsp;If the same variables are to be used,
&nbsp;then a simple reference to the earlier description would seem to suffice.

Sudhin&gt;&gt;&gt;&gt; it must be generic because not all the evpn features are supported in Yang models and it is up to the user choice that is reason any specific ways to capture the data is omitted.

&nbsp;I believe that section 3.8 on high availability is intended to cause a switch
&nbsp;of traffic path from DUT to MHPE2. &nbsp; However, the text in that section never
&nbsp;refers to MHPE 2. &nbsp;It refers to switch of routing processor. &nbsp;It is possible
&nbsp;that this is intended to be a redundancy test within DUT. &nbsp;If so, it would
&nbsp;help to be more explicit, since as far as I know we do not standardize that
&nbsp;behavior.

I am left puzzled as to the need for MHPE2 in these tests. &nbsp;I assume there is
some obvious and simple reason for including it that I missed. &nbsp;Could you add
an explanation?

Sudhin&gt;&gt;&gt; MHPE2 is very much needed in multi homing scenario, it plays as a standby role in testing, sure will add an explnation in the section&nbsp; &quot;Test Setup Configuration&quot;.
Nits:
&nbsp; &nbsp;At the end of section 2, the text reads &quot;The X is used as variable...&quot;
&nbsp; &nbsp;Could you change that to &quot;The X below is used as a variable ...&quot;? &nbsp;I spent
&nbsp; &nbsp;some time looking backwards for the X.

Sudhin &gt;&gt;&gt;&gt; Sure

&nbsp;The equation at the end of section 3.9 (ARD / ND scaling) is somewhat
&nbsp;misleading. &nbsp;It uses the same v1, v2, ..vn in successive lines to implicitly
&nbsp;refer to the IPv4 measurements and the IPv6 measurements. &nbsp;It would be good
&nbsp;to name these separately, as obviously the same calculation can not produce
&nbsp;two different results.

Sudhin&gt;&gt;&gt; sure will change.




------------------------------

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------------------------------

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Hi Joel,<br /><br />Thank you for the comments. Appreciate it. Kindly find =
the answers inline and the modification will be done shortly, I will update=
 the new version in a couple of days.<br /><br />Regards,<br />Sudhin<br />=
<br />From: bmwg-request@ietf.org<br />Sent: Thu, 17 Jun 2021 00:31:11<br /=
>To: bmwg@ietf.org<br />Subject: bmwg Digest, Vol 200, Issue 6<br /><br />S=
end bmwg mailing list submissions to<br />&nbsp;&nbsp;&nbsp;bmwg@ietf.org<b=
r /><br />To subscribe or unsubscribe via the World Wide Web, visit<br />&n=
bsp;&nbsp;&nbsp;<a href=3D"https://www.ietf.org/mailman/listinfo/bmwg=3D=3D=
" target=3D"_blank">https://www.ietf.org/mailman/listinfo/bmwg</a><br />or,=
 via email, send a message with subject or body &#39;help&#39; to<br />&nbs=
p;&nbsp;&nbsp;bmwg-request@ietf.org<br /><br />You can reach the person man=
aging the list at<br />&nbsp;&nbsp;&nbsp;bmwg-owner@ietf.org<br /><br />Whe=
n replying, please edit your Subject line so it is more specific<br />than =
&quot;Re: Contents of bmwg digest...&quot;<br /><br /><br />Today&#39;s Top=
ics:<br /><br />&nbsp; 1. Rtgdir last call review of draft-ietf-bmwg-evpnte=
st-08<br />&nbsp; &nbsp; &nbsp;(Joel Halpern via Datatracker)<br /><br /><b=
r />----------------------------------------------------------------------<=
br /><br />Message: 1<br />Date: Wed, 16 Jun 2021 11:59:12 -0700<br />From:=
 Joel Halpern via Datatracker &lt;noreply@ietf.org&gt;<br />To: &lt;rtg-dir=
@ietf.org&gt;<br />Cc: bmwg@ietf.org, draft-ietf-bmwg-evpntest.all@ietf.org=
,<br />&nbsp;&nbsp;&nbsp;last-call@ietf.org<br />Subject: [bmwg] Rtgdir las=
t call review of draft-ietf-bmwg-evpntest-08<br />Message-ID: &lt;162386995=
210.13675.8048702439794738383@ietfa.amsl.com&gt;<br />Content-Type: text/pl=
ain; charset=3D&quot;utf-8&quot;<br /><br />Reviewer: Joel Halpern<br />Rev=
iew result: Has Issues<br /><br />I have been selected as the Routing Direc=
torate reviewer for this draft. The<br />Routing Directorate seeks to revie=
w all routing or routing-related drafts as<br />they pass through IETF last=
 call and IESG review, and sometimes on special<br />request. The purpose o=
f the review is to provide assistance to the Routing ADs.<br />For more inf=
ormation about the Routing Directorate, please see<br />?<a href=3D"http://=
trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir=3D=3D" target=3D"_blank">http=
://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a><br /><br />Although th=
ese comments are primarily for the use of the Routing ADs, it would<br />be=
 helpful if you could consider them along with any other IETF Last Call<br =
/>comments that you receive, and strive to resolve them through discussion =
or by<br />updating the draft.<br /><br />Document: draft-name-version.txt<=
br />Reviewer: your-name<br />Review Date: date<br />IETF LC End Date: date=
-if-known<br />Intended Status: copy-from-I-D<br /><br />Summary:<br />I ha=
ve some minor concerns about this document that I think should be resolved<=
br />before publication.<br /><br />Major Comments: N/A<br /><br />Minor Co=
mments:<br />&nbsp; &nbsp;Reading section 3.1 on the rate for learning addr=
esses, I am left guessing<br />&nbsp; &nbsp;how the procedure is to be perf=
ormed. &nbsp;The text references RFC 2889 section<br />&nbsp; &nbsp;5.8, bu=
t only for the meaning for the terms. &nbsp;The test procedure is clearly<b=
r />&nbsp; &nbsp;different since that test relies on observing flooding. &n=
bsp;As best I can<br />&nbsp; &nbsp;guess, the test assumes that there is a=
n observable (Netconf ? YANG ?)<br />&nbsp; &nbsp;variable that reports how=
 many local MAC addresses the device under test<br />&nbsp; &nbsp;has learn=
ed. &nbsp;It would be good to be more explicit about that, if possible<br /=
>&nbsp; &nbsp;pointing to the YANG module that defines the parameter to be =
observed.<br />&nbsp;A similar clarification would be helpful on section 3.=
2 (on control plane MAC<br />&nbsp;learning). It probably would be helpful =
if sections 3.3 and 3.4 then<br />&nbsp;referenced sections 3.1 and 3.2 res=
pectively for what is being observed. This<br />&nbsp;probably applies to s=
ection 4 as well. &nbsp;If the same variables are to be used,<br />&nbsp;th=
en a simple reference to the earlier description would seem to suffice.<br =
/><br />Sudhin&gt;&gt;&gt;&gt; it must be generic because not all the evpn =
features are supported in Yang models and it is up to the user choice that =
is reason any specific ways to capture the data is omitted.<br /><br />&nbs=
p;I believe that section 3.8 on high availability is intended to cause a sw=
itch<br />&nbsp;of traffic path from DUT to MHPE2. &nbsp; However, the text=
 in that section never<br />&nbsp;refers to MHPE 2. &nbsp;It refers to swit=
ch of routing processor. &nbsp;It is possible<br />&nbsp;that this is inten=
ded to be a redundancy test within DUT. &nbsp;If so, it would<br />&nbsp;he=
lp to be more explicit, since as far as I know we do not standardize that<b=
r />&nbsp;behavior.<br /><br />I am left puzzled as to the need for MHPE2 i=
n these tests. &nbsp;I assume there is<br />some obvious and simple reason =
for including it that I missed. &nbsp;Could you add<br />an explanation?<br=
 /><br />Sudhin&gt;&gt;&gt; MHPE2 is very much needed in multi homing scena=
rio, it plays as a standby role in testing, sure will add an explnation in =
the section&nbsp;<pre class=3D"newpage" style=3D"font-size: 13.333333015441=
895px; margin-top: 0px; margin-bottom: 0px; break-before: page; caret-color=
: rgb(0, 0, 0); color: rgb(0, 0, 0);"> &quot;Test Setup Configuration&quot;=
.</pre><br />Nits:<br />&nbsp; &nbsp;At the end of section 2, the text read=
s &quot;The X is used as variable...&quot;<br />&nbsp; &nbsp;Could you chan=
ge that to &quot;The X below is used as a variable ...&quot;? &nbsp;I spent=
<br />&nbsp; &nbsp;some time looking backwards for the X.<br /><br />Sudhin=
 &gt;&gt;&gt;&gt; Sure<br /><br />&nbsp;The equation at the end of section =
3.9 (ARD / ND scaling) is somewhat<br />&nbsp;misleading. &nbsp;It uses the=
 same v1, v2, ..vn in successive lines to implicitly<br />&nbsp;refer to th=
e IPv4 measurements and the IPv6 measurements. &nbsp;It would be good<br />=
&nbsp;to name these separately, as obviously the same calculation can not p=
roduce<br />&nbsp;two different results.<br /><br />Sudhin&gt;&gt;&gt; sure=
 will change.<br /><br /><br /><br /><br />------------------------------<b=
r /><br />Subject: Digest Footer<br /><br />_______________________________=
________________<br />bmwg mailing list<br />bmwg@ietf.org<br /><a href=3D"=
https://www.ietf.org/mailman/listinfo/bmwg=3D=3D" target=3D"_blank">https:/=
/www.ietf.org/mailman/listinfo/bmwg</a><br /><br /><br />------------------=
------------<br /><br />End of bmwg Digest, Vol 200, Issue 6<br />*********=
***************************<br>
--=_e815f7a7c04732e26b76056bb8960dea--


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To: Sudhin <sudhinjacob=40rediffmail.com@dmarc.ietf.org>, "bmwg@ietf.org" <bmwg@ietf.org>
Cc: rtg-dir@ietf.org
References: <1623870071.S.8707.15529.f5-147-235.1623925334.24220@webmail.rediffmail.com>
From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [RTG-DIR] bmwg Digest, Vol 200, Issue 6
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Thank you Sudhin.  If the observations have to be generic, then could 
you at least say that this will be measured by observing the network 
management counters that the implementations has chosen to expose?  And 
maybe even note that this will likely need to be specific to the 
implementation as said coutners are not currently standardized?

Yours,
Joel

On 6/17/2021 6:22 AM, Sudhin wrote:
> Hi Joel,
> 
> Thank you for the comments. Appreciate it. Kindly find the answers 
> inline and the modification will be done shortly, I will update the new 
> version in a couple of days.
> 
> Regards,
> Sudhin
> 
> From: bmwg-request@ietf.org
> Sent: Thu, 17 Jun 2021 00:31:11
> To: bmwg@ietf.org
> Subject: bmwg Digest, Vol 200, Issue 6
> 
> Send bmwg mailing list submissions to
>     bmwg@ietf.org
> 
> To subscribe or unsubscribe via the World Wide Web, visit
> https://www.ietf.org/mailman/listinfo/bmwg 
> <https://www.ietf.org/mailman/listinfo/bmwg==>
> or, via email, send a message with subject or body 'help' to
>     bmwg-request@ietf.org
> 
> You can reach the person managing the list at
>     bmwg-owner@ietf.org
> 
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of bmwg digest..."
> 
> 
> Today's Topics:
> 
>    1. Rtgdir last call review of draft-ietf-bmwg-evpntest-08
>       (Joel Halpern via Datatracker)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Wed, 16 Jun 2021 11:59:12 -0700
> From: Joel Halpern via Datatracker <noreply@ietf.org>
> To: <rtg-dir@ietf.org>
> Cc: bmwg@ietf.org, draft-ietf-bmwg-evpntest.all@ietf.org,
>     last-call@ietf.org
> Subject: [bmwg] Rtgdir last call review of draft-ietf-bmwg-evpntest-08
> Message-ID: <162386995210.13675.8048702439794738383@ietfa.amsl.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Reviewer: Joel Halpern
> Review result: Has Issues
> 
> I have been selected as the Routing Directorate reviewer for this draft. The
> Routing Directorate seeks to review all routing or routing-related drafts as
> they pass through IETF last call and IESG review, and sometimes on special
> request. The purpose of the review is to provide assistance to the 
> Routing ADs.
> For more information about the Routing Directorate, please see
> ?http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir 
> <http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir==>
> 
> Although these comments are primarily for the use of the Routing ADs, it 
> would
> be helpful if you could consider them along with any other IETF Last Call
> comments that you receive, and strive to resolve them through discussion 
> or by
> updating the draft.
> 
> Document: draft-name-version.txt
> Reviewer: your-name
> Review Date: date
> IETF LC End Date: date-if-known
> Intended Status: copy-from-I-D
> 
> Summary:
> I have some minor concerns about this document that I think should be 
> resolved
> before publication.
> 
> Major Comments: N/A
> 
> Minor Comments:
>     Reading section 3.1 on the rate for learning addresses, I am left 
> guessing
>     how the procedure is to be performed.  The text references RFC 2889 
> section
>     5.8, but only for the meaning for the terms.  The test procedure is 
> clearly
>     different since that test relies on observing flooding.  As best I can
>     guess, the test assumes that there is an observable (Netconf ? YANG ?)
>     variable that reports how many local MAC addresses the device under test
>     has learned.  It would be good to be more explicit about that, if 
> possible
>     pointing to the YANG module that defines the parameter to be observed.
>   A similar clarification would be helpful on section 3.2 (on control 
> plane MAC
>   learning). It probably would be helpful if sections 3.3 and 3.4 then
>   referenced sections 3.1 and 3.2 respectively for what is being 
> observed. This
>   probably applies to section 4 as well.  If the same variables are to 
> be used,
>   then a simple reference to the earlier description would seem to suffice.
> 
> Sudhin>>>> it must be generic because not all the evpn features are 
> supported in Yang models and it is up to the user choice that is reason 
> any specific ways to capture the data is omitted.
> 
>   I believe that section 3.8 on high availability is intended to cause a 
> switch
>   of traffic path from DUT to MHPE2.   However, the text in that section 
> never
>   refers to MHPE 2.  It refers to switch of routing processor.  It is 
> possible
>   that this is intended to be a redundancy test within DUT.  If so, it would
>   help to be more explicit, since as far as I know we do not standardize 
> that
>   behavior.
> 
> I am left puzzled as to the need for MHPE2 in these tests.  I assume 
> there is
> some obvious and simple reason for including it that I missed.  Could 
> you add
> an explanation?
> 
> Sudhin>>> MHPE2 is very much needed in multi homing scenario, it plays 
> as a standby role in testing, sure will add an explnation in the section
> 
>   "Test Setup Configuration".
> 
> 
> Nits:
>     At the end of section 2, the text reads "The X is used as variable..."
>     Could you change that to "The X below is used as a variable ..."?  I 
> spent
>     some time looking backwards for the X.
> 
> Sudhin >>>> Sure
> 
>   The equation at the end of section 3.9 (ARD / ND scaling) is somewhat
>   misleading.  It uses the same v1, v2, ..vn in successive lines to 
> implicitly
>   refer to the IPv4 measurements and the IPv6 measurements.  It would be 
> good
>   to name these separately, as obviously the same calculation can not 
> produce
>   two different results.
> 
> Sudhin>>> sure will change.
> 
> 
> 
> 
> ------------------------------
> 
> Subject: Digest Footer
> 
> _______________________________________________
> bmwg mailing list
> bmwg@ietf.org
> https://www.ietf.org/mailman/listinfo/bmwg 
> <https://www.ietf.org/mailman/listinfo/bmwg==>
> 
> 
> ------------------------------
> 
> End of bmwg Digest, Vol 200, Issue 6
> ************************************


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Hi Joel,

Sure, I will put a note.

Regards,
Sudhin

From: &quot;Joel M. Halpern&quot; &lt;jmh@joelhalpern.com&gt;
Sent: Thu, 17 Jun 2021 19:23:29
To: &quot;bmwg@ietf.org&quot; &lt;bmwg@ietf.org&gt;
Cc: rtg-dir@ietf.org
Subject: Re: [RTG-DIR] bmwg Digest, Vol 200, Issue 6
&nbsp;iWe couldn&#39;t verify the sender of this email.Thank you Sudhin. &nbsp;If the observations have to be generic, then could
you at least say that this will be measured by observing the network
management counters that the implementations has chosen to expose? &nbsp;And
maybe even note that this will likely need to be specific to the
implementation as said coutners are not currently standardized?

Yours,
Joel

On 6/17/2021 6:22 AM, Sudhin wrote:
&gt; Hi Joel,
&gt;
&gt; Thank you for the comments. Appreciate it. Kindly find the answers
&gt; inline and the modification will be done shortly, I will update the new
&gt; version in a couple of days.
&gt;
&gt; Regards,
&gt; Sudhin
&gt;
&gt; From: bmwg-request@ietf.org
&gt; Sent: Thu, 17 Jun 2021 00:31:11
&gt; To: bmwg@ietf.org
&gt; Subject: bmwg Digest, Vol 200, Issue 6
&gt;
&gt; Send bmwg mailing list submissions to
&gt; &nbsp; &nbsp; &nbsp; &nbsp;bmwg@ietf.org
&gt;
&gt; To subscribe or unsubscribe via the World Wide Web, visit
&gt; https://www.ietf.org/mailman/listinfo/bmwg
&gt; &lt;https://www.ietf.org/mailman/listinfo/bmwg==&gt;
&gt; or, via email, send a message with subject or body &#39;help&#39; to
&gt; &nbsp; &nbsp; &nbsp; &nbsp;bmwg-request@ietf.org
&gt;
&gt; You can reach the person managing the list at
&gt; &nbsp; &nbsp; &nbsp; &nbsp;bmwg-owner@ietf.org
&gt;
&gt; When replying, please edit your Subject line so it is more specific
&gt; than &quot;Re: Contents of bmwg digest...&quot;
&gt;
&gt;
&gt; Today&#39;s Topics:
&gt;
&gt; &nbsp; &nbsp; 1. Rtgdir last call review of draft-ietf-bmwg-evpntest-08
&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;(Joel Halpern via Datatracker)
&gt;
&gt;
&gt; ----------------------------------------------------------------------
&gt;
&gt; Message: 1
&gt; Date: Wed, 16 Jun 2021 11:59:12 -0700
&gt; From: Joel Halpern via Datatracker &lt;noreply@ietf.org&gt;
&gt; To: &lt;rtg-dir@ietf.org&gt;
&gt; Cc: bmwg@ietf.org, draft-ietf-bmwg-evpntest.all@ietf.org,
&gt; &nbsp; &nbsp; &nbsp; &nbsp;last-call@ietf.org
&gt; Subject: [bmwg] Rtgdir last call review of draft-ietf-bmwg-evpntest-08
&gt; Message-ID: &lt;162386995210.13675.8048702439794738383@ietfa.amsl.com&gt;
&gt; Content-Type: text/plain; charset=&quot;utf-8&quot;
&gt;
&gt; Reviewer: Joel Halpern
&gt; Review result: Has Issues
&gt;
&gt; I have been selected as the Routing Directorate reviewer for this draft. The
&gt; Routing Directorate seeks to review all routing or routing-related drafts as
&gt; they pass through IETF last call and IESG review, and sometimes on special
&gt; request. The purpose of the review is to provide assistance to the
&gt; Routing ADs.
&gt; For more information about the Routing Directorate, please see
&gt; ?http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
&gt; &lt;http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir==&gt;
&gt;
&gt; Although these comments are primarily for the use of the Routing ADs, it
&gt; would
&gt; be helpful if you could consider them along with any other IETF Last Call
&gt; comments that you receive, and strive to resolve them through discussion
&gt; or by
&gt; updating the draft.
&gt;
&gt; Document: draft-name-version.txt
&gt; Reviewer: your-name
&gt; Review Date: date
&gt; IETF LC End Date: date-if-known
&gt; Intended Status: copy-from-I-D
&gt;
&gt; Summary:
&gt; I have some minor concerns about this document that I think should be
&gt; resolved
&gt; before publication.
&gt;
&gt; Major Comments: N/A
&gt;
&gt; Minor Comments:
&gt; &nbsp; &nbsp; &nbsp; Reading section 3.1 on the rate for learning addresses, I am left
&gt; guessing
&gt; &nbsp; &nbsp; &nbsp; how the procedure is to be performed. &nbsp; The text references RFC 2889
&gt; section
&gt; &nbsp; &nbsp; &nbsp; 5.8, but only for the meaning for the terms. &nbsp; The test procedure is
&gt; clearly
&gt; &nbsp; &nbsp; &nbsp; different since that test relies on observing flooding. &nbsp; As best I can
&gt; &nbsp; &nbsp; &nbsp; guess, the test assumes that there is an observable (Netconf ? YANG ?)
&gt; &nbsp; &nbsp; &nbsp; variable that reports how many local MAC addresses the device under test
&gt; &nbsp; &nbsp; &nbsp; has learned. &nbsp; It would be good to be more explicit about that, if
&gt; possible
&gt; &nbsp; &nbsp; &nbsp; pointing to the YANG module that defines the parameter to be observed.
&gt; &nbsp; &nbsp;A similar clarification would be helpful on section 3.2 (on control
&gt; plane MAC
&gt; &nbsp; &nbsp;learning). It probably would be helpful if sections 3.3 and 3.4 then
&gt; &nbsp; &nbsp;referenced sections 3.1 and 3.2 respectively for what is being
&gt; observed. This
&gt; &nbsp; &nbsp;probably applies to section 4 as well. &nbsp; If the same variables are to
&gt; be used,
&gt; &nbsp; &nbsp;then a simple reference to the earlier description would seem to suffice.
&gt;
&gt; Sudhin&gt;&gt;&gt;&gt; it must be generic because not all the evpn features are
&gt; supported in Yang models and it is up to the user choice that is reason
&gt; any specific ways to capture the data is omitted.
&gt;
&gt; &nbsp; &nbsp;I believe that section 3.8 on high availability is intended to cause a
&gt; switch
&gt; &nbsp; &nbsp;of traffic path from DUT to MHPE2. &nbsp; &nbsp;However, the text in that section
&gt; never
&gt; &nbsp; &nbsp;refers to MHPE 2. &nbsp; It refers to switch of routing processor. &nbsp; It is
&gt; possible
&gt; &nbsp; &nbsp;that this is intended to be a redundancy test within DUT. &nbsp; If so, it would
&gt; &nbsp; &nbsp;help to be more explicit, since as far as I know we do not standardize
&gt; that
&gt; &nbsp; &nbsp;behavior.
&gt;
&gt; I am left puzzled as to the need for MHPE2 in these tests. &nbsp; I assume
&gt; there is
&gt; some obvious and simple reason for including it that I missed. &nbsp; Could
&gt; you add
&gt; an explanation?
&gt;
&gt; Sudhin&gt;&gt;&gt; MHPE2 is very much needed in multi homing scenario, it plays
&gt; as a standby role in testing, sure will add an explnation in the section
&gt;
&gt; &nbsp; &quot;Test Setup Configuration&quot;.
&gt;
&gt;
&gt; Nits:
&gt; &nbsp; &nbsp; &nbsp; At the end of section 2, the text reads &quot;The X is used as variable...&quot;
&gt; &nbsp; &nbsp; &nbsp; Could you change that to &quot;The X below is used as a variable ...&quot;? &nbsp; I
&gt; spent
&gt; &nbsp; &nbsp; &nbsp; some time looking backwards for the X.
&gt;
&gt; Sudhin &gt;&gt;&gt;&gt; Sure
&gt;
&gt; &nbsp; &nbsp;The equation at the end of section 3.9 (ARD / ND scaling) is somewhat
&gt; &nbsp; &nbsp;misleading. &nbsp; It uses the same v1, v2, ..vn in successive lines to
&gt; implicitly
&gt; &nbsp; &nbsp;refer to the IPv4 measurements and the IPv6 measurements. &nbsp; It would be
&gt; good
&gt; &nbsp; &nbsp;to name these separately, as obviously the same calculation can not
&gt; produce
&gt; &nbsp; &nbsp;two different results.
&gt;
&gt; Sudhin&gt;&gt;&gt; sure will change.
&gt;
&gt;
&gt;
&gt;
&gt; ------------------------------
&gt;
&gt; Subject: Digest Footer
&gt;
&gt; _______________________________________________
&gt; bmwg mailing list
&gt; bmwg@ietf.org
&gt; https://www.ietf.org/mailman/listinfo/bmwg
&gt; &lt;https://www.ietf.org/mailman/listinfo/bmwg==&gt;
&gt;
&gt;
&gt; ------------------------------
&gt;
&gt; End of bmwg Digest, Vol 200, Issue 6
&gt; ************************************
--=_a8afca3c1c48930cf930419d8c8128cf
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="UTF-8"

Hi Joel,<br /><br />Sure, I will put a note.<br /><br />Regards,<br />Sudhi=
n<br /><br />From: &quot;Joel M. Halpern&quot; &lt;jmh@joelhalpern.com&gt;<=
br />Sent: Thu, 17 Jun 2021 19:23:29<br />To: &quot;bmwg@ietf.org&quot; &lt=
;bmwg@ietf.org&gt;<br />Cc: rtg-dir@ietf.org<br />Subject: Re: [RTG-DIR] bm=
wg Digest, Vol 200, Issue 6<br />&nbsp;<div style=3D"display:block; backgro=
und:#616161; border-radius:10px; padding:15px; width:calc(100% - 45px); flo=
at:left; margin:10px 15px 10px 0;"><p style=3D"padding:0;margin:0; color:#f=
ff; font-size:15px; line-height:30px; "><b style=3D"display:inline-block; m=
argin:0 10px 0 0; background:#fff; border-radius:100%; width:30px; height:3=
0px; font-size:18px; font-family:serif; line-height:30px; text-align:center=
; color:#616161;">i</b>We couldn&#39;t verify the sender of this email.</p>=
</div>Thank you Sudhin. &nbsp;If the observations have to be generic, then =
could<br />you at least say that this will be measured by observing the net=
work<br />management counters that the implementations has chosen to expose=
? &nbsp;And<br />maybe even note that this will likely need to be specific =
to the<br />implementation as said coutners are not currently standardized?=
<br /><br />Yours,<br />Joel<br /><br />On 6/17/2021 6:22 AM, Sudhin wrote:=
<br />&gt; Hi Joel,<br />&gt;<br />&gt; Thank you for the comments. Appreci=
ate it. Kindly find the answers<br />&gt; inline and the modification will =
be done shortly, I will update the new<br />&gt; version in a couple of day=
s.<br />&gt;<br />&gt; Regards,<br />&gt; Sudhin<br />&gt;<br />&gt; From: =
bmwg-request@ietf.org<br />&gt; Sent: Thu, 17 Jun 2021 00:31:11<br />&gt; T=
o: bmwg@ietf.org<br />&gt; Subject: bmwg Digest, Vol 200, Issue 6<br />&gt;=
<br />&gt; Send bmwg mailing list submissions to<br />&gt; &nbsp; &nbsp; &n=
bsp; &nbsp;bmwg@ietf.org<br />&gt;<br />&gt; To subscribe or unsubscribe vi=
a the World Wide Web, visit<br />&gt; <a href=3D"https://www.ietf.org/mailm=
an/listinfo/bmwg=3D=3D" target=3D"_blank">https://www.ietf.org/mailman/list=
info/bmwg</a><br />&gt; &lt;<a href=3D"https://www.ietf.org/mailman/listinf=
o/bmwg=3D=3D" target=3D"_blank">https://www.ietf.org/mailman/listinfo/bmwg<=
/a>=3D=3D&gt;<br />&gt; or, via email, send a message with subject or body =
&#39;help&#39; to<br />&gt; &nbsp; &nbsp; &nbsp; &nbsp;bmwg-request@ietf.or=
g<br />&gt;<br />&gt; You can reach the person managing the list at<br />&g=
t; &nbsp; &nbsp; &nbsp; &nbsp;bmwg-owner@ietf.org<br />&gt;<br />&gt; When =
replying, please edit your Subject line so it is more specific<br />&gt; th=
an &quot;Re: Contents of bmwg digest...&quot;<br />&gt;<br />&gt;<br />&gt;=
 Today&#39;s Topics:<br />&gt;<br />&gt; &nbsp; &nbsp; 1. Rtgdir last call =
review of draft-ietf-bmwg-evpntest-08<br />&gt; &nbsp; &nbsp; &nbsp; &nbsp;=
 &nbsp;(Joel Halpern via Datatracker)<br />&gt;<br />&gt;<br />&gt; -------=
---------------------------------------------------------------<br />&gt;<b=
r />&gt; Message: 1<br />&gt; Date: Wed, 16 Jun 2021 11:59:12 -0700<br />&g=
t; From: Joel Halpern via Datatracker &lt;noreply@ietf.org&gt;<br />&gt; To=
: &lt;rtg-dir@ietf.org&gt;<br />&gt; Cc: bmwg@ietf.org, draft-ietf-bmwg-evp=
ntest.all@ietf.org,<br />&gt; &nbsp; &nbsp; &nbsp; &nbsp;last-call@ietf.org=
<br />&gt; Subject: [bmwg] Rtgdir last call review of draft-ietf-bmwg-evpnt=
est-08<br />&gt; Message-ID: &lt;162386995210.13675.8048702439794738383@iet=
fa.amsl.com&gt;<br />&gt; Content-Type: text/plain; charset=3D&quot;utf-8&q=
uot;<br />&gt;<br />&gt; Reviewer: Joel Halpern<br />&gt; Review result: Ha=
s Issues<br />&gt;<br />&gt; I have been selected as the Routing Directorat=
e reviewer for this draft. The<br />&gt; Routing Directorate seeks to revie=
w all routing or routing-related drafts as<br />&gt; they pass through IETF=
 last call and IESG review, and sometimes on special<br />&gt; request. The=
 purpose of the review is to provide assistance to the<br />&gt; Routing AD=
s.<br />&gt; For more information about the Routing Directorate, please see=
<br />&gt; ?<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir=
=3D=3D" target=3D"_blank">http://trac.tools.ietf.org/area/rtg/trac/wiki/Rtg=
Dir</a><br />&gt; &lt;<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/w=
iki/RtgDir=3D=3D" target=3D"_blank">http://trac.tools.ietf.org/area/rtg/tra=
c/wiki/RtgDir</a>=3D=3D&gt;<br />&gt;<br />&gt; Although these comments are=
 primarily for the use of the Routing ADs, it<br />&gt; would<br />&gt; be =
helpful if you could consider them along with any other IETF Last Call<br /=
>&gt; comments that you receive, and strive to resolve them through discuss=
ion<br />&gt; or by<br />&gt; updating the draft.<br />&gt;<br />&gt; Docum=
ent: draft-name-version.txt<br />&gt; Reviewer: your-name<br />&gt; Review =
Date: date<br />&gt; IETF LC End Date: date-if-known<br />&gt; Intended Sta=
tus: copy-from-I-D<br />&gt;<br />&gt; Summary:<br />&gt; I have some minor=
 concerns about this document that I think should be<br />&gt; resolved<br =
/>&gt; before publication.<br />&gt;<br />&gt; Major Comments: N/A<br />&gt=
;<br />&gt; Minor Comments:<br />&gt; &nbsp; &nbsp; &nbsp; Reading section =
3.1 on the rate for learning addresses, I am left<br />&gt; guessing<br />&=
gt; &nbsp; &nbsp; &nbsp; how the procedure is to be performed. &nbsp; The t=
ext references RFC 2889<br />&gt; section<br />&gt; &nbsp; &nbsp; &nbsp; 5.=
8, but only for the meaning for the terms. &nbsp; The test procedure is<br =
/>&gt; clearly<br />&gt; &nbsp; &nbsp; &nbsp; different since that test rel=
ies on observing flooding. &nbsp; As best I can<br />&gt; &nbsp; &nbsp; &nb=
sp; guess, the test assumes that there is an observable (Netconf ? YANG ?)<=
br />&gt; &nbsp; &nbsp; &nbsp; variable that reports how many local MAC add=
resses the device under test<br />&gt; &nbsp; &nbsp; &nbsp; has learned. &n=
bsp; It would be good to be more explicit about that, if<br />&gt; possible=
<br />&gt; &nbsp; &nbsp; &nbsp; pointing to the YANG module that defines th=
e parameter to be observed.<br />&gt; &nbsp; &nbsp;A similar clarification =
would be helpful on section 3.2 (on control<br />&gt; plane MAC<br />&gt; &=
nbsp; &nbsp;learning). It probably would be helpful if sections 3.3 and 3.4=
 then<br />&gt; &nbsp; &nbsp;referenced sections 3.1 and 3.2 respectively f=
or what is being<br />&gt; observed. This<br />&gt; &nbsp; &nbsp;probably a=
pplies to section 4 as well. &nbsp; If the same variables are to<br />&gt; =
be used,<br />&gt; &nbsp; &nbsp;then a simple reference to the earlier desc=
ription would seem to suffice.<br />&gt;<br />&gt; Sudhin&gt;&gt;&gt;&gt; i=
t must be generic because not all the evpn features are<br />&gt; supported=
 in Yang models and it is up to the user choice that is reason<br />&gt; an=
y specific ways to capture the data is omitted.<br />&gt;<br />&gt; &nbsp; =
&nbsp;I believe that section 3.8 on high availability is intended to cause =
a<br />&gt; switch<br />&gt; &nbsp; &nbsp;of traffic path from DUT to MHPE2=
. &nbsp; &nbsp;However, the text in that section<br />&gt; never<br />&gt; =
&nbsp; &nbsp;refers to MHPE 2. &nbsp; It refers to switch of routing proces=
sor. &nbsp; It is<br />&gt; possible<br />&gt; &nbsp; &nbsp;that this is in=
tended to be a redundancy test within DUT. &nbsp; If so, it would<br />&gt;=
 &nbsp; &nbsp;help to be more explicit, since as far as I know we do not st=
andardize<br />&gt; that<br />&gt; &nbsp; &nbsp;behavior.<br />&gt;<br />&g=
t; I am left puzzled as to the need for MHPE2 in these tests. &nbsp; I assu=
me<br />&gt; there is<br />&gt; some obvious and simple reason for includin=
g it that I missed. &nbsp; Could<br />&gt; you add<br />&gt; an explanation=
?<br />&gt;<br />&gt; Sudhin&gt;&gt;&gt; MHPE2 is very much needed in multi=
 homing scenario, it plays<br />&gt; as a standby role in testing, sure wil=
l add an explnation in the section<br />&gt;<br />&gt; &nbsp; &quot;Test Se=
tup Configuration&quot;.<br />&gt;<br />&gt;<br />&gt; Nits:<br />&gt; &nbs=
p; &nbsp; &nbsp; At the end of section 2, the text reads &quot;The X is use=
d as variable...&quot;<br />&gt; &nbsp; &nbsp; &nbsp; Could you change that=
 to &quot;The X below is used as a variable ...&quot;? &nbsp; I<br />&gt; s=
pent<br />&gt; &nbsp; &nbsp; &nbsp; some time looking backwards for the X.<=
br />&gt;<br />&gt; Sudhin &gt;&gt;&gt;&gt; Sure<br />&gt;<br />&gt; &nbsp;=
 &nbsp;The equation at the end of section 3.9 (ARD / ND scaling) is somewha=
t<br />&gt; &nbsp; &nbsp;misleading. &nbsp; It uses the same v1, v2, ..vn i=
n successive lines to<br />&gt; implicitly<br />&gt; &nbsp; &nbsp;refer to =
the IPv4 measurements and the IPv6 measurements. &nbsp; It would be<br />&g=
t; good<br />&gt; &nbsp; &nbsp;to name these separately, as obviously the s=
ame calculation can not<br />&gt; produce<br />&gt; &nbsp; &nbsp;two differ=
ent results.<br />&gt;<br />&gt; Sudhin&gt;&gt;&gt; sure will change.<br />=
&gt;<br />&gt;<br />&gt;<br />&gt;<br />&gt; ------------------------------=
<br />&gt;<br />&gt; Subject: Digest Footer<br />&gt;<br />&gt; ___________=
____________________________________<br />&gt; bmwg mailing list<br />&gt; =
bmwg@ietf.org<br />&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/bm=
wg=3D=3D" target=3D"_blank">https://www.ietf.org/mailman/listinfo/bmwg</a><=
br />&gt; &lt;<a href=3D"https://www.ietf.org/mailman/listinfo/bmwg=3D=3D" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/bmwg</a>=3D=3D&gt;<=
br />&gt;<br />&gt;<br />&gt; ------------------------------<br />&gt;<br /=
>&gt; End of bmwg Digest, Vol 200, Issue 6<br />&gt; **********************=
**************<br>
--=_a8afca3c1c48930cf930419d8c8128cf--


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Cc: "Yemin (Amy)" <amy.yemin@huawei.com>, =?UTF-8?Q?LucAndr=c3=a9_Burdet?= <laburdet.ietf@gmail.com>, Zhenghaomian <zhenghaomian@huawei.com>
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Subject: [RTG-DIR] Change in Routing Directorate Chairs
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Hi,

After several years of service, Amy has decided to step down as Co-Chair 
of the Routing Directorate.
Please join me in warmly thanking Amy for all the excellent work she has 
done over these years.
Amy, thank you very much !

Haomian has volunteered to take the role, so at the same time please 
join me in welcoming Haomian.
He will work with Luc-André who remains as co-chair and whom I thank for 
his continued engagement.

Martin
(for the routing ADs)


From nobody Mon Jun 21 06:48:44 2021
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From: Alvaro Retana <aretana.ietf@gmail.com>
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Date: Mon, 21 Jun 2021 06:48:30 -0700
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To: Martin Vigoureux <martin.vigoureux@nokia.com>, rtg-dir@ietf.org
Cc: =?UTF-8?Q?LucAndr=C3=A9_Burdet?= <laburdet.ietf@gmail.com>,  Zhenghaomian <zhenghaomian@huawei.com>, "Yemin (Amy)" <amy.yemin@huawei.com>
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Subject: Re: [RTG-DIR] Change in Routing Directorate Chairs
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--000000000000c5d7a805c546ed81
Content-Type: text/plain; charset="UTF-8"
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Thank you Amy for your timely dedication!

Welcome Haomian!


Alvaro.

On June 21, 2021 at 8:34:47 AM, Martin Vigoureux (martin.vigoureux@nokia.co=
m)
wrote:

Hi,

After several years of service, Amy has decided to step down as Co-Chair
of the Routing Directorate.
Please join me in warmly thanking Amy for all the excellent work she has
done over these years.
Amy, thank you very much !

Haomian has volunteered to take the role, so at the same time please
join me in welcoming Haomian.
He will work with Luc-Andr=C3=A9 who remains as co-chair and whom I thank f=
or
his continued engagement.

Martin
(for the routing ADs)

--000000000000c5d7a805c546ed81
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body><div style=3D"font-family:Helvetica,Arial;font-size:13px">Than=
k you Amy for your timely dedication!</div><div style=3D"font-family:Helvet=
ica,Arial;font-size:13px"><br></div><div style=3D"font-family:Helvetica,Ari=
al;font-size:13px">Welcome Haomian!</div><div style=3D"font-family:Helvetic=
a,Arial;font-size:13px"><br></div><div style=3D"font-family:Helvetica,Arial=
;font-size:13px"><br></div><div style=3D"font-family:Helvetica,Arial;font-s=
ize:13px">Alvaro.</div> <br><p class=3D"airmail_on">On June 21, 2021 at 8:3=
4:47 AM, Martin Vigoureux (<a href=3D"mailto:martin.vigoureux@nokia.com">ma=
rtin.vigoureux@nokia.com</a>) wrote:</p> <blockquote type=3D"cite" class=3D=
"clean_bq"><span><div><div></div><div>Hi,
<br>
<br>After several years of service, Amy has decided to step down as Co-Chai=
r =20
<br>of the Routing Directorate.
<br>Please join me in warmly thanking Amy for all the excellent work she ha=
s =20
<br>done over these years.
<br>Amy, thank you very much !
<br>
<br>Haomian has volunteered to take the role, so at the same time please =
=20
<br>join me in welcoming Haomian.
<br>He will work with Luc-Andr=C3=A9 who remains as co-chair and whom I tha=
nk for =20
<br>his continued engagement.
<br>
<br>Martin
<br>(for the routing ADs)
<br>
<br></div></div></span></blockquote> <div class=3D"gmail_signature"></div><=
/body></html>

--000000000000c5d7a805c546ed81--


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From: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
To: Zhenghaomian <zhenghaomian@huawei.com>, "Yemin (Amy)" <amy.yemin@huawei.com>
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Thread-Topic: [EXTERNAL] Re: [RTG-DIR] Change in Routing Directorate Chairs
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Date: Mon, 21 Jun 2021 15:00:48 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/lq1KxJwGzrCrt3CoLUNXzXO9Rvo>
Subject: Re: [RTG-DIR] [EXTERNAL] Re:  Change in Routing Directorate Chairs
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From nobody Tue Jun 22 03:16:26 2021
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Subject: [RTG-DIR] Rtgdir early review of draft-ietf-mpls-lsp-ping-ospfv3-codepoint-04
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Reviewer: Matthew Bocci
Review result: Has Nits

I have been selected as the RTG DIR reviewer for
draft-ietf-mpls-lsp-ping-ospfv3-codepoint.

Thanks for the draft. This is clear and well written. I have just a couple of
minor editorial nits, below, that should be fixed prior to publication.

Regards
Matthew

Abstract:
s/Segment SUb-TLV/Segment Sub-TLV

1. Introduction
s/"Protocol in the Segment IS Sub-TLV"/"Protocol in the Segment ID Sub-TLV"




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From: Yingzhen Qu <yingzhen.ietf@gmail.com>
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Subject: [RTG-DIR] Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
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I have been selected as the Routing Directorate reviewer for this draft. =
The Routing Directorate seeks to review all routing or routing-related =
drafts as they pass through IETF last call and IESG review, and =
sometimes on special request. The purpose of the review is to provide =
assistance to the Routing ADs. For more information about the Routing =
Directorate, please see =
http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir =
<http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir>

Although these comments are primarily for the use of the Routing ADs, it =
would be helpful if you could consider them along with any other IETF =
Last Call comments that you receive, and strive to resolve them through =
discussion or by updating the draft.

Document: draft-ietf-lsvr-bgp-spf
Reviewer: Yingzhen Qu
Review Date: Jun 15th, 2021
Intended Status: Standards Track

Summary:

This document has some issues that should be at least considered prior =
to publication.

Comments:


Major issues:

Considering	the SPF Status attribute TLV has the same type for Node, =
Link and Prefix NLRI, it is implied that a BGP update message can only =
contain a single kind of NLRI (for example, Node or Link). I=E2=80=99d =
suggest make the draft explicitly state it.

About SPF Status TLV, use the Node NLRI as an example (section 5.2.1.2), =
it says in the draft: =E2=80=9CIf the SPF Status TLV is not included =
with the Node NLRI, the node is considered to be up and is available for =
transit traffic.=E2=80=9D, then later, =E2=80=9CIf a BGP speaker =
received the Node NLRI but the SPF Status TLV is not received, then any =
previously received information is considered as implicitly withdrawn =
and the update is propagated to other BGP speakers. =E2=80=9C. These two =
statements seem to conflict.


Comments inline:

[Line numbers from idnits]

78	       5.2.1.  Node NLRI Usage . . . . . . . . . . . . . . . . . =
. .  11
79	         5.2.1.1.  Node NLRI Attribute SPF Capability TLV  . . . =
. .  11
80	         5.2.1.2.  BGP-LS-SPF Node NLRI Attribute SPF Status TLV =
. .  12

[Minor]: section 5.2.1.1 should be changed to "BGP-LS-SPF Node NLRI =
Attribute SPF Capability TLV" to be consistent with other titles.

226	   Another potential advantage of BGP SPF is that both IPv6 and =
IPv4 can
227	   both be supported using the BGP-LS-SPF SAFI with the same =
BGP-LS-SPF
228	   NLRIs. =20

[Minor]: potential advantage? I'd suggest remove "potential".
[nits]: both IPv6 and IPv4 can both be supported


315	   The BGP SPF extensions reuse the Node, Link, and Prefix NLRI =
defined
316	   in [RFC7752].  The usage of the BGP-LS NLRI, metric =
attributes, and
317	   attribute extensions is described in Section 5.2.1.

[minor]: metric attributes? Might be better just remove it.
s/Section 5.2.1/Section 5.2


357	   hop sessions) and the direct connection discovery and =
liveliness
358	   detection for the interconnecting links are independent of =
the BGP
359	   protocol.  the scope of this document.  For example, =
liveliness

[nits]: unfinished sentence: the scope of this document.


470	5.2.  Extensions to BGP-LS

472	   [RFC7752] describes a mechanism by which link-state and TE
473	   information can be collected from IGPs and shared with =
external
474	   components using the BGP protocol.  It describes both the =
definition
475	   of the BGP-LS-SPF NLRI that advertise links, nodes, and =
prefixes
476	   comprising IGP link-state information and the definition of a =
BGP
477	   path attribute (BGP-LS attribute) that carries link, node, =
and prefix

[Major]: line 475: should be "BGP-LS NLRI"


556	   If the SPF Status TLV is received and the corresponding Node =
NLRI has
557	   not been received, then the SPF Status TLV is ignored and not =
used in
558	   SPF computation but is still announced to other BGP speakers. =
 An
559	   implementation MAY log an error for further analysis.  If a =
BGP
560	   speaker received the Node NLRI but the SPF Status TLV is not
561	   received, then any previously received information is =
considered as
562	   implicitly withdrawn and the update is propagated to other =
BGP
563	   speakers.  A BGP speaker receiving a BGP Update containing a =
SPF
564	   Status TLV in the BGP-LS attribute [RFC7752] with a value =
that is
565	   outside the range of defined values SHOULD be processed and =
announced
566	   to other BGP speakers.  However, a BGP speaker MUST not use =
the
567	   Status TLV in its SPF computation.  An implementation MAY log =
this
568	   condition for further analysis.

[nits]: s/MUST not/MUST NOT
[minor]: s/BGP speaker/BGP SPF speaker
There are multi places in the draft using "BGP speaker" instead of "BGP =
SPF speaker", please go over and fix when applicable.
For example:=20
1408	   excessive SPF calculations.  When a BGP speaker detects that =
its
section 7.1


864	   When a BGP SPF speaker completely loses its sequence number =
state,
865	   i.e., due to a cold start, or in the unlikely possibility =
that that

[nits]: extra "that".


943	   o  Local Route Information Base (LOC-RIB) - This routing =
table
944	      contains reachability information (i.e., next hops) for =
all
945	      prefixes (both IPv4 and IPv6) as well as BGP-LS-SPF node
946	      reachability.  Implementations may choose to implement =
this with
947	      separate RIBs for each address family and/or Prefix versus =
Node
948	      reachability.  It is synonymous with the Loc-RIB specified =
in
949	      [RFC4271].

[nits]: s/Loc-RIB/LOC-RIB


1017	       *  If the Current-Prefix's corresponding prefix is in the =
LOC-RIB
1018	          and the cost is less than the current route's metric, =
the

[major]: I think this meant to be "more than the current route's metric"


1134	   operate today (i.e., "Ships-in-the-Night" mode).  There is no
1135	   implicit route redistribution between the BGP address =
families.

[major]: what about redistribution from other protocols, say OSPF? =20

1167	   prior to withdrawal.  If the link becomes available in that =
period,
1168	   the originator of the BGP-LS-SPF LINK NLRI SHOULD advertise a =
more
1169	   recent version of the BGP-LS-SPF Link NLRI without the SPF =
Status TLV
1170	   in the BGP-LS Link Attributes.=20

[major]: "without SPF Status TLV", this is related with the second =
=E2=80=9CMajor issues=E2=80=9D above.


1263	   A BGP-LS-SPF Speaker MUST perform the following syntactic =
validation
1264	   of the BGP-LS-SPF NLRI to determine if it is malformed.

[minor]: there are a few places in the draft using "BGP-LS-SPF =
Speaker|speaker", may change to "BGP SPF speaker"? =20

1425	   Within a BGP SPF Routing Domain, the IGP metrics for all =
advertised
1426	   links SHOULD be configured or defaulted consistently.=20

[major]: in section 5.2.2, it says "One possible default for metric
   would be to give each interface a cost of 1 making it effectively a
   hop count.". Why not define a default value so all implementations =
will be consistent?


--Apple-Mail=_4F7ECC5E-2B0C-4150-96D4-75E05763E6D2
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">I have been selected as the =
Routing Directorate reviewer for this draft. The Routing Directorate =
seeks to review all routing or routing-related drafts as they pass =
through IETF last call and IESG review, and sometimes on special =
request. The purpose of the review is to provide assistance to the =
Routing ADs. For more information about the Routing Directorate, please =
see <a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" =
class=3D""><span style=3D"font-kerning: none; color: #2e02a4" =
class=3D"">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</span></a>=
</span></div><div style=3D"margin: 0px; font-stretch: normal; font-size: =
14px; line-height: normal; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26); background-color: rgb(255, 253, 242); min-height: =
15px;" class=3D""><span style=3D"font-kerning: none" class=3D""></span><br=
 class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">Although these =
comments are primarily for the use of the Routing ADs, it would be =
helpful if you could consider them along with any other IETF Last Call =
comments that you receive, and strive to resolve them through discussion =
or by updating the draft.</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">Document: draft-ietf-lsvr-bgp-spf</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">Reviewer: Yingzhen =
Qu</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">Review Date: =
Jun 15th, 2021</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">Intended =
Status: Standards Track</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">Summary:</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242); min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" class=3D"">This =
document has some issues that should be at least considered prior to =
publication.</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242); min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">Comments:</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" class=3D"">Major=
 issues:</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div>
<ul class=3D"">
<li style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">Considering<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>the SPF =
Status attribute TLV has the same type for Node, Link and Prefix NLRI, =
it is implied that a BGP update message can only contain a single kind =
of NLRI (for example, Node or Link). I=E2=80=99d suggest make the draft =
explicitly state it.</span></li>
</ul><div style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div>
<ul class=3D"">
<li style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;;" class=3D""><span =
style=3D"color: #1a1a1a" class=3D""></span><span style=3D"font-kerning: =
none; color: #1a1a1a" class=3D"">About SPF Status TLV, use the Node NLRI =
as an example (section 5.2.1.2), it says in the draft: =E2=80=9C</span><sp=
an style=3D"font-kerning: none" class=3D"">If the SPF Status TLV is not =
included with the Node NLRI, the node is considered to be up and is =
available for transit traffic.</span><span style=3D"font-kerning: none; =
color: #1a1a1a" class=3D"">=E2=80=9D, then later, =E2=80=9C</span><span =
style=3D"font-kerning: none" class=3D"">If a BGP speaker received the =
Node NLRI but the SPF Status TLV is not received, then any previously =
received information is considered as implicitly withdrawn and the =
update is propagated to other BGP speakers. =E2=80=9C. These two =
statements seem to conflict.</span></li>
</ul><div style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">Comments inline:</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" class=3D"">[Line=
 numbers from idnits]</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">78<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; &nbsp; &nbsp; 5.2.1.&nbsp; Node NLRI Usage . . . . . . . =
. . . . . . . . . . . .&nbsp; 11</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">79<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; &nbsp; &nbsp; &nbsp; 5.2.1.1.&nbsp; Node NLRI Attribute =
SPF Capability TLV&nbsp; . . . . .&nbsp; 11</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">80<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span> &nbsp; &nbsp; &nbsp; &nbsp; =
5.2.1.2.&nbsp; BGP-LS-SPF Node NLRI Attribute SPF Status TLV . .&nbsp; =
12</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[Minor]: section 5.2.1.1 should be changed to "BGP-LS-SPF =
Node NLRI Attribute SPF Capability TLV" to be consistent with other =
titles.</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">226<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; Another potential advantage of BGP SPF is that both IPv6 =
and IPv4 can</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">227<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
both be supported using the BGP-LS-SPF SAFI with the same =
BGP-LS-SPF</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">228<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
NLRIs. &nbsp;</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242); min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[Minor]: potential advantage? I'd suggest remove =
"potential".</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">[nits]: =
both IPv6 and IPv4 can both be supported</span></div><div style=3D"margin:=
 0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242); min-height: 15px;" class=3D""><span =
style=3D"font-kerning: none" class=3D""></span><br class=3D""></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">315<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
The BGP SPF extensions reuse the Node, Link, and Prefix NLRI =
defined</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">316<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
in [RFC7752].&nbsp; The usage of the BGP-LS NLRI, metric attributes, =
and</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">317<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
attribute extensions is described in Section 5.2.1.</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">[minor]: metric =
attributes? Might be better just remove it.</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">s/Section 5.2.1/Section =
5.2</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">357<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; hop sessions) and the direct connection discovery and =
liveliness</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">358<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
detection for the interconnecting links are independent of the =
BGP</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">359<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
protocol.&nbsp; the scope of this document.&nbsp; For example, =
liveliness</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[nits]: unfinished sentence: the scope of this =
document.</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">470<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>5.2.&nbsp; Extensions to BGP-LS</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242); min-height: 15px;" class=3D""><span =
style=3D"font-kerning: none" class=3D""></span><br class=3D""></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">472<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span> &nbsp; [RFC7752] describes a =
mechanism by which link-state and TE</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">473<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span> &nbsp; information can be =
collected from IGPs and shared with external</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">474<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span> &nbsp; components using the BGP =
protocol.&nbsp; It describes both the definition</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">475<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span> &nbsp; of the BGP-LS-SPF NLRI =
that advertise links, nodes, and prefixes</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">476<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span> &nbsp; comprising IGP link-state =
information and the definition of a BGP</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">477<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span> &nbsp; path attribute (BGP-LS =
attribute) that carries link, node, and prefix</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">[Major]: line =
475: should be "BGP-LS NLRI"</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">556<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; If the SPF Status TLV is received and the corresponding =
Node NLRI has</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">557<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
not been received, then the SPF Status TLV is ignored and not used =
in</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">558<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
SPF computation but is still announced to other BGP speakers.&nbsp; =
An</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">559<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
implementation MAY log an error for further analysis.&nbsp; If a =
BGP</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">560<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
speaker received the Node NLRI but the SPF Status TLV is =
not</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">561<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
received, then any previously received information is considered =
as</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">562<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
implicitly withdrawn and the update is propagated to other =
BGP</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">563<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
speakers.&nbsp; A BGP speaker receiving a BGP Update containing a =
SPF</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">564<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
Status TLV in the BGP-LS attribute [RFC7752] with a value that =
is</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">565<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
outside the range of defined values SHOULD be processed and =
announced</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">566<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
to other BGP speakers.&nbsp; However, a BGP speaker MUST not use =
the</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">567<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
Status TLV in its SPF computation.&nbsp; An implementation MAY log =
this</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">568<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
condition for further analysis.</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[nits]: s/MUST not/MUST NOT</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">[minor]: s/BGP speaker/BGP SPF =
speaker</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">There are multi =
places in the draft using "BGP speaker" instead of "BGP SPF speaker", =
please go over and fix when applicable.</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">For =
example:&nbsp;</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">1408<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
excessive SPF calculations.&nbsp; When a BGP speaker detects that =
its</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">section =
7.1</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">864<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; When a BGP SPF speaker completely loses its sequence =
number state,</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">865<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
i.e., due to a cold start, or in the unlikely possibility that =
that</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[nits]: extra "that".</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">943<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; o&nbsp; Local Route Information Base (LOC-RIB) - This =
routing table</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">944<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>&nbsp; =
&nbsp; &nbsp; contains reachability information (i.e., next hops) for =
all</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">945<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>&nbsp; =
&nbsp; &nbsp; prefixes (both IPv4 and IPv6) as well as BGP-LS-SPF =
node</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">946<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>&nbsp; =
&nbsp; &nbsp; reachability.&nbsp; Implementations may choose to =
implement this with</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">947<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>&nbsp; =
&nbsp; &nbsp; separate RIBs for each address family and/or Prefix versus =
Node</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">948<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>&nbsp; =
&nbsp; &nbsp; reachability.&nbsp; It is synonymous with the Loc-RIB =
specified in</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">949<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>&nbsp; =
&nbsp; &nbsp; [RFC4271].</span></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[nits]: s/Loc-RIB/LOC-RIB</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242); min-height: 15px;" class=3D""><span =
style=3D"font-kerning: none" class=3D""></span><br class=3D""></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">1017<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
&nbsp; &nbsp; *&nbsp; If the Current-Prefix's corresponding prefix is in =
the LOC-RIB</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">1018<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>&nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; and the cost is less than the current =
route's metric, the</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242); min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[major]: I think this meant to be "more than the current =
route's metric"</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242); min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">1134<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; operate today (i.e., "Ships-in-the-Night" mode).&nbsp; =
There is no</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">1135<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
implicit route redistribution between the BGP address =
families.</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">[major]: what about redistribution from other protocols, say =
OSPF? &nbsp;</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242); min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">1167<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; prior to withdrawal.&nbsp; If the link becomes available =
in that period,</span></div><div style=3D"margin: 0px; font-stretch: =
normal; font-size: 14px; line-height: normal; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-kerning: none" class=3D"">1168<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
the originator of the BGP-LS-SPF LINK NLRI SHOULD advertise a =
more</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">1169<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
recent version of the BGP-LS-SPF Link NLRI without the SPF Status =
TLV</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">1170<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
in the BGP-LS Link Attributes.&nbsp;</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242); min-height: 15px;" class=3D""><span =
style=3D"font-kerning: none" class=3D""></span><br class=3D""></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">[major]: "without SPF Status =
TLV", this is related with the second =E2=80=9CMajor issues=E2=80=9D =
above.</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242); =
min-height: 15px;" class=3D""><span style=3D"font-kerning: none" =
class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242); min-height: 15px;" class=3D""><span style=3D"font-kerning: =
none" class=3D""></span><br class=3D""></div><div style=3D"margin: 0px; =
font-stretch: normal; font-size: 14px; line-height: normal; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26); background-color: rgb(255, =
253, 242);" class=3D""><span style=3D"font-kerning: none" =
class=3D"">1263<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span> &nbsp; A BGP-LS-SPF Speaker MUST perform the following syntactic =
validation</span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">1264<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span> &nbsp; =
of the BGP-LS-SPF NLRI to determine if it is malformed.</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">[minor]: there =
are a few places in the draft using "BGP-LS-SPF Speaker|speaker", may =
change to "BGP SPF speaker"? &nbsp;</span></div><div style=3D"margin: =
0px; font-stretch: normal; font-size: 14px; line-height: normal; =
font-family: &quot;PT Mono&quot;; color: rgb(26, 26, 26); =
background-color: rgb(255, 253, 242); min-height: 15px;" class=3D""><span =
style=3D"font-kerning: none" class=3D""></span><br class=3D""></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">1425<span class=3D"Apple-tab-span"=
 style=3D"white-space:pre">	</span> &nbsp; Within a BGP SPF Routing =
Domain, the IGP metrics for all advertised</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">1426<span class=3D"Apple-tab-span"=
 style=3D"white-space:pre">	</span> &nbsp; links SHOULD be =
configured or defaulted consistently.&nbsp;</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242); min-height: 15px;" =
class=3D""><span style=3D"font-kerning: none" class=3D""></span><br =
class=3D""></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26); background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-kerning: none" class=3D"">[major]: in =
section 5.2.2, it says "One possible default for metric</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
26, 26); background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-kerning: none" class=3D"">&nbsp;&nbsp; would be to give =
each interface a cost of 1 making it effectively a</span></div><div =
style=3D"margin: 0px; font-stretch: normal; font-size: 14px; =
line-height: normal; font-family: &quot;PT Mono&quot;; color: rgb(26, =
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not define a default value so all implementations will be =
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From: Jon Hardwick <jonhardwick@microsoft.com>
To: "rtg-dir@ietf.org" <rtg-dir@ietf.org>
Thread-Topic: Rtgdir Last Call review of draft-ietf-rtgwg-policy-model
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/lU_a6zJEXMajRfn2Y0bZAdK3T78>
Subject: [RTG-DIR] FW: Rtgdir Last Call review of draft-ietf-rtgwg-policy-model
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Forwarding to the correct email address for RTG-DIR...

From: Jon Hardwick
Sent: 26 June 2021 11:32
To: rtg-ads@ietf.org; draft-ietf-rtgwg-policy-model.all@ietf.org
Cc: rtgdir@ietf.org; rtgwg@ietf.org
Subject: Rtgdir Last Call review of draft-ietf-rtgwg-policy-model


I have been selected as the Routing Directorate reviewer for this draft. Th=
e Routing Directorate seeks to review all routing or routing-related drafts=
 as they pass through IETF last call and IESG review, and sometimes on spec=
ial request. The purpose of the review is to provide assistance to the Rout=
ing ADs. For more information about the Routing Directorate, please see htt=
p://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir.



Although these comments are primarily for the use of the Routing ADs, it wo=
uld be helpful if you could consider them along with any other IETF Last Ca=
ll comments that you receive, and strive to resolve them through discussion=
 or by updating the draft.



Document: draft-ietf-rtgwg-policy-model-29

Reviewer: Jon Hardwick

Review Date: Jun 26th, 2021

Intended Status: Standards Track



Summary:

This document provides a foundational framework for the definition of routi=
ng protocol policies regarding the filtering in / out of routes when they a=
re imported / exported between routing protocol neighbors and/or routing pr=
otocols and the RIB. Its purpose is to provide a framework which can be aug=
mented by routing protocols in their policy YANG modules. I think that the =
document meets its goal very well.



The document is in good shape. It's clear, well-defined in its scope and ea=
sy to read. I have a few minor concerns that I would like to see addressed =
before publication.



Minor Comments:



Section 4.2

Why no match-set-options for neighbor-set?  Is there no application for dif=
ferentiating between "any of these neighbors" and "none of these neighbors"=
?



You can only match on a single interface. Why is that? Was there no use cas=
e for any ANY / INVERT match on a set of interfaces? I am thinking of multi=
homing use cases.



"Comparison conditions may similarly use options..." - what do you mean by =
a "comparison condition"? The term is not used elsewhere in the document.



Section 5

"If the conditions are not satisfied, then evaluation proceeds to the
   next policy statement"



I think that evaluation also proceeds to the next policy statement if the c=
onditions were satisfied, but the actions did not include either accept-rou=
te or reject-route. Is that correct? I think it would be worth making that =
explicit.



Section 7.2

p21:

      description
        "Mask length range lower bound. It MUST NOT be less than
         the prefix length defined in ip-prefix.";



Why must it not be?  And is there a situation in which it makes sense to al=
low it to be greater than the prefix length defined in ip-prefix?  Should t=
here be a "must" clause to police this constraint?



p29:

            description
              "Policy statements group conditions and actions
               within a policy definition.  They are evaluated in
               the order specified (see the description of policy
               evaluation at the top of this module.";



Missing close-parenthesis in this description.



Best regards

Jon



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<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Forwardin=
g to the correct email address for RTG-DIR&#8230;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
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<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> Jon Hardwick
<br>
<b>Sent:</b> 26 June 2021 11:32<br>
<b>To:</b> rtg-ads@ietf.org; draft-ietf-rtgwg-policy-model.all@ietf.org<br>
<b>Cc:</b> rtgdir@ietf.org; rtgwg@ietf.org<br>
<b>Subject:</b> Rtgdir Last Call review of draft-ietf-rtgwg-policy-model<o:=
p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p style=3D"margin:0cm">I have been selected as the Routing Directorate rev=
iewer for this draft. The Routing Directorate seeks to review all routing o=
r routing-related drafts as they pass through IETF last call and IESG revie=
w, and sometimes on special request.
 The purpose of the review is to provide assistance to the Routing ADs. For=
 more information about the Routing Directorate, please see
<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir">http://tra=
c.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a>.<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Although these comments are primarily for the use o=
f the Routing ADs, it would be helpful if you could consider them along wit=
h any other IETF Last Call comments that you receive, and strive to resolve=
 them through discussion or by updating
 the draft.<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Document: draft-ietf-rtgwg-policy-model-29<o:p></o:=
p></p>
<p style=3D"margin:0cm">Reviewer: Jon Hardwick<o:p></o:p></p>
<p style=3D"margin:0cm">Review Date: Jun 26th, 2021<o:p></o:p></p>
<p style=3D"margin:0cm">Intended Status: Standards Track<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Summary:<o:p></o:p></p>
<p style=3D"margin:0cm">This document provides a foundational framework for=
 the definition of routing protocol policies regarding the filtering in / o=
ut of routes when they are imported / exported between routing protocol nei=
ghbors and/or routing protocols and
 the RIB. Its purpose is to provide a framework which can be augmented by r=
outing protocols in their policy YANG modules. I think that the document me=
ets its goal very well.<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">The document is in good shape. It's clear, well-def=
ined in its scope and easy to read. I have a few minor concerns that I woul=
d like to see addressed before publication.<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Minor Comments:<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Section 4.2<o:p></o:p></p>
<p style=3D"margin:0cm">Why no match-set-options for neighbor-set?&nbsp; Is=
 there no application for differentiating between &quot;any of these neighb=
ors&quot; and &quot;none of these neighbors&quot;?<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">You can only match on a single interface. Why is th=
at? Was there no use case for any ANY / INVERT match on a set of interfaces=
? I am thinking of multihoming use cases.<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">&quot;Comparison conditions may similarly use optio=
ns&#8230;&quot; - what do you mean by a &quot;comparison condition&quot;? T=
he term is not used elsewhere in the document.<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Section 5<o:p></o:p></p>
<p style=3D"margin:0cm">&quot;If the conditions are not satisfied, then eva=
luation proceeds to the<br>
&nbsp;&nbsp; next policy statement&quot;<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">I think that evaluation also proceeds to the next p=
olicy statement if the conditions were satisfied, but the actions did not i=
nclude either accept-route or reject-route. Is that correct? I think it wou=
ld be worth making that explicit.<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Section 7.2<o:p></o:p></p>
<p style=3D"margin:0cm">p21:<o:p></o:p></p>
<p style=3D"margin:0cm"><span style=3D"font-size:10.5pt;font-family:&quot;P=
T Mono&quot;,serif;color:black;background:#FFFDF5">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp; description<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;Mask length range lower bo=
und. It MUST NOT be less than<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the prefix length defined =
in ip-prefix.&quot;;</span><span style=3D"font-size:10.5pt;font-family:&quo=
t;PT Mono&quot;,serif;color:black"><o:p></o:p></span></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Why must it not be?&nbsp; And is there a situation =
in which it makes sense to allow it to be greater than the prefix length de=
fined in ip-prefix?&nbsp; Should there be a &quot;must&quot; clause to poli=
ce this constraint?<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">p29:<o:p></o:p></p>
<p style=3D"margin:0cm"><span style=3D"font-size:10.5pt;font-family:&quot;P=
T Mono&quot;,serif;color:black;background:#FFFDF5">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; description<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp; &quot;Policy statements group conditions and actions<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; within a policy definition.&nbsp; They are evaluated in<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; the order specified (see the description of policy<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; evaluation at the top of this module.&quot;;</span><span style=3D=
"font-size:10.5pt;font-family:&quot;PT Mono&quot;,serif;color:black"><o:p><=
/o:p></span></p>
<p style=3D"margin:0cm"><o:p>&nbsp;</o:p></p>
<p style=3D"margin:0cm">Missing close-parenthesis in this description.<o:p>=
</o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
<p style=3D"margin:0cm">Best regards<o:p></o:p></p>
<p style=3D"margin:0cm">Jon<o:p></o:p></p>
<p style=3D"margin:0cm">&nbsp;<o:p></o:p></p>
</div>
</body>
</html>

--_000_DBAPR83MB045515B86B9943D57F59DFC6A3059DBAPR83MB0455EURP_--


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Reviewer: Mike McBride
Review result: Has Nits

Reviewer: Mike McBride
Review result: Ready with nits

I have been selected to do a routing directorate early review of this draft
which has passed SPRING WG Last Call (copied to SFC WG) , but would benefit
from a larger review.

Document: draft-ietf-spring-nsh-sr
Review Date: 28 June 2021
Intended Status: Standards Track

Summary:

A couple of nits found but otherwise this document is ready to proceed to the
IESG.

Comments:

The document is well written. Aside from the following recommended changes its
good to go.

There are a couple of long semi-awkward sentences. They still make sense but,
for readability, it would help to reword them. And there are a couple of
recommended grammar related changes.

1. The 3rd paragraph, in the Abstract, says:

"The integration described in this document demonstrates that NSH and
SR can work jointly and complement each other leaving the network
operator with the flexibility to use whichever transport technology
makes sense in specific areas of their network infrastructure, and
still maintain an end-to-end service plane using NSH."

I would recommend rewording this to:

"This integration demonstrates that NSH and SR can work
cooperatively with each other and provide the network
operator with the flexibility to use whichever transport technology
makes sense in specific areas of their network infrastructure while
still maintaining an end-to-end service plane using NSH."

2. In the section 1.1. SFC Overview and Rationale I would recommend changing
this:

"Particularly, cascading SFs at the so-called Third Generation
Partnership Project (3GPP) Gi interface (N6 interface in 5G
architecture) in the context of mobile network infrastructure, have
shown their limitations, such as the same redundant classification
features must be supported by many SFs to execute their function,
some SFs receive traffic that they are not supposed to process (e.g.,
TCP proxies receiving UDP traffic), which inevitably affects their
dimensioning and performance, an increased design complexity related
to the properly ordered invocation of several SFs, etc."

to this:

"For instance, cascading SFs at the 3GPP (Third Generation
Partnership Project) Gi interface (N6 interface in 5G
architecture) has shown limitations such as 1) redundant classification
features must be supported by many SFs to execute their function,
2) some SFs receive traffic that they are not supposed to process (e.g.,
TCP proxies receiving UDP traffic) which inevitably affects their
dimensioning and performance, 3) an increased design complexity related
to the properly ordered invocation of several SFs."

3. Need a comma after "problems":

"In order to solve those problems and to decouple the services
topology from the underlying physical network while allowing for
simplified service delivery, Service Function Chaining (SFC)
techniques have been introduced [RFC7665]."

4. Probably can scratch the "Indeed" and just start with "SFC...":

"Indeed, SFC allows to dynamically create service
planes that can be used by specific traffic flows"




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From: James Guichard <james.n.guichard@futurewei.com>
To: Mike McBride <mmcbride7@gmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "draft-ietf-spring-nsh-sr.all@ietf.org" <draft-ietf-spring-nsh-sr.all@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: Rtgdir early review of draft-ietf-spring-nsh-sr-07
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Date: Tue, 29 Jun 2021 11:19:34 +0000
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-spring-nsh-sr-07
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From: "BRUNGARD, DEBORAH A" <db3546@att.com>
To: Alvaro Retana <aretana.ietf@gmail.com>, Martin Vigoureux <martin.vigoureux@nokia.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: =?utf-8?B?THVjQW5kcsOpIEJ1cmRldA==?= <laburdet.ietf@gmail.com>, "Yemin (Amy)" <amy.yemin@huawei.com>, Zhenghaomian <zhenghaomian@huawei.com>
Thread-Topic: [RTG-DIR] Change in Routing Directorate Chairs
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Date: Tue, 29 Jun 2021 19:05:13 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/3HoPhr1XbNLxjVNBdEu2SPfiy4Q>
Subject: Re: [RTG-DIR] Change in Routing Directorate Chairs
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From: Zhenghaomian <zhenghaomian@huawei.com>
To: "BRUNGARD, DEBORAH A" <db3546@att.com>, Alvaro Retana <aretana.ietf@gmail.com>, Martin Vigoureux <martin.vigoureux@nokia.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
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Thread-Topic: [RTG-DIR] Change in Routing Directorate Chairs
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Date: Wed, 30 Jun 2021 01:10:26 +0000
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Subject: Re: [RTG-DIR] Change in Routing Directorate Chairs
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From: "Hejia (Jia)" <hejia@huawei.com>
To: "BRUNGARD, DEBORAH A" <db3546@att.com>, Alvaro Retana <aretana.ietf@gmail.com>, Martin Vigoureux <martin.vigoureux@nokia.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
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Thread-Topic: [RTG-DIR] Change in Routing Directorate Chairs
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Date: Wed, 30 Jun 2021 06:26:32 +0000
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Subject: Re: [RTG-DIR] Change in Routing Directorate Chairs
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Subject: Re: [RTG-DIR] Change in Routing Directorate Chairs
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Amy =E2=80=93 Thank you for all your effort to keep the routing area =
working weel.=20

Welcome Haomian!=20

=20

Sue=20

=20

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Alvaro =
Retana
Sent: Monday, June 21, 2021 9:49 AM
To: Martin Vigoureux; rtg-dir@ietf.org
Cc: LucAndr=C3=A9 Burdet; Yemin (Amy); Zhenghaomian
Subject: Re: [RTG-DIR] Change in Routing Directorate Chairs

=20

Thank you Amy for your timely dedication!

=20

Welcome Haomian!

=20

=20

Alvaro.

=20

On June 21, 2021 at 8:34:47 AM, Martin Vigoureux =
(martin.vigoureux@nokia.com) wrote:

Hi,=20

After several years of service, Amy has decided to step down as Co-Chair =

of the Routing Directorate.=20
Please join me in warmly thanking Amy for all the excellent work she has =

done over these years.=20
Amy, thank you very much !=20

Haomian has volunteered to take the role, so at the same time please=20
join me in welcoming Haomian.=20
He will work with Luc-Andr=C3=A9 who remains as co-chair and whom I =
thank for=20
his continued engagement.=20

Martin=20
(for the routing ADs)=20


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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Amy =E2=80=93 Thank you for all your effort to keep the routing area =
working weel. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Welcome Haomian! <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
rtg-dir [mailto:rtg-dir-bounces@ietf.org] <b>On Behalf Of </b>Alvaro =
Retana<br><b>Sent:</b> Monday, June 21, 2021 9:49 AM<br><b>To:</b> =
Martin Vigoureux; rtg-dir@ietf.org<br><b>Cc:</b> LucAndr=C3=A9 Burdet; =
Yemin (Amy); Zhenghaomian<br><b>Subject:</b> Re: [RTG-DIR] Change in =
Routing Directorate Chairs<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Thank =
you Amy for your timely dedication!<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'><o:p>&nbs=
p;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Welcome =
Haomian!<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'><o:p>&nbs=
p;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'><o:p>&nbs=
p;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Alvaro.<o=
:p></o:p></span></p></div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'><o:p>&nbs=
p;</o:p></span></p><p class=3Dairmailon><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'>On June =
21, 2021 at 8:34:47 AM, Martin Vigoureux (<a =
href=3D"mailto:martin.vigoureux@nokia.com">martin.vigoureux@nokia.com</a>=
) wrote:<o:p></o:p></span></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Hi, =
<br><br>After several years of service, Amy has decided to step down as =
Co-Chair <br>of the Routing Directorate. <br>Please join me in warmly =
thanking Amy for all the excellent work she has <br>done over these =
years. <br>Amy, thank you very much ! <br><br>Haomian has volunteered to =
take the role, so at the same time please <br>join me in welcoming =
Haomian. <br>He will work with Luc-Andr=C3=A9 who remains as co-chair =
and whom I thank for <br>his continued engagement. <br><br>Martin =
<br>(for the routing ADs) =
<o:p></o:p></span></p></div></div></blockquote></div></body></html>
------=_NextPart_000_0029_01D76D78.E316E2F0--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Yingzhen Qu <yingzhen.ietf@gmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-spf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org>
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Thread-Topic: Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
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Subject: Re: [RTG-DIR] Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
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From: Yingzhen Qu <yingzhen.ietf@gmail.com>
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Cc: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-spf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org>, "guntervandeveldecc@icloud.com" <guntervandeveldecc@icloud.com>, =?utf-8?Q?Luc_Andr=C3=A9_Burdet?= <laburdet.ietf@gmail.com>, "Yemin (Amy)" <amy.yemin@huawei.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
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Subject: Re: [RTG-DIR] Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
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	charset=utf-8

Hi Acee,

Thanks for addressing my comments. I had a quick look at the changes in =
version -14, and have a question about the following comment. The change =
done does make the second point clear, but my original comment was about =
the fourth point. Please also consider make the term consistent, =
=E2=80=9CCurrent-Prefix=E2=80=99s=E2=80=9D vs. =E2=80=9Ccurrent =
route=E2=80=99s=E2=80=9D.

> =20
> 1017       *  If the Current-Prefix's corresponding prefix is in the =
LOC-RIB
> 1018           and the cost is less than the current route's metric, =
the
> =20
> [major]: I think this meant to be "more than the current route's =
metric"
> =20
> Clarified this so that there is no ambiguity as to which metric is =
referenced.
> =20

Thanks,
Yingzhen



> On Jun 30, 2021, at 8:09 AM, Acee Lindem (acee) <acee@cisco.com> =
wrote:
>=20
> Hi Yingzhen,=20
> =20
> Thanks for the review. We=E2=80=99ve incorporated most of your =
comments into the -14 version.
> =20
> From: Yingzhen Qu <yingzhen.ietf@gmail.com =
<mailto:yingzhen.ietf@gmail.com>>
> Date: Tuesday, June 22, 2021 at 3:46 PM
> To: Routing Directorate <rtg-dir@ietf.org <mailto:rtg-dir@ietf.org>>, =
"draft-ietf-lsvr-bgp-spf@ietf.org =
<mailto:draft-ietf-lsvr-bgp-spf@ietf.org>" =
<draft-ietf-lsvr-bgp-spf@ietf.org =
<mailto:draft-ietf-lsvr-bgp-spf@ietf.org>>, "lsvr@ietf.org =
<mailto:lsvr@ietf.org>" <lsvr@ietf.org <mailto:lsvr@ietf.org>>
> Cc: "guntervandeveldecc@icloud.com =
<mailto:guntervandeveldecc@icloud.com>" <guntervandeveldecc@icloud.com =
<mailto:guntervandeveldecc@icloud.com>>, Luc Andr=C3=A9 Burdet =
<laburdet.ietf@gmail.com <mailto:laburdet.ietf@gmail.com>>, "Yemin =
(Amy)" <amy.yemin@huawei.com <mailto:amy.yemin@huawei.com>>
> Subject: Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
> Resent-From: <alias-bounces@ietf.org <mailto:alias-bounces@ietf.org>>
> Resent-To: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Shawn =
Zandi <szandi@linkedin.com <mailto:szandi@linkedin.com>>, Wim Henderickx =
<wim.henderickx@nokia.com <mailto:wim.henderickx@nokia.com>>, Keyur =
Patel <keyur@arrcus.com <mailto:keyur@arrcus.com>>
> Resent-Date: Tuesday, June 22, 2021 at 3:45 PM
> =20
> I have been selected as the Routing Directorate reviewer for this =
draft. The Routing Directorate seeks to review all routing or =
routing-related drafts as they pass through IETF last call and IESG =
review, and sometimes on special request. The purpose of the review is =
to provide assistance to the Routing ADs. For more information about the =
Routing Directorate, please =
seehttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir =
<http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir>
> =20
> Although these comments are primarily for the use of the Routing ADs, =
it would be helpful if you could consider them along with any other IETF =
Last Call comments that you receive, and strive to resolve them through =
discussion or by updating the draft.
> =20
> Document: draft-ietf-lsvr-bgp-spf
> Reviewer: Yingzhen Qu
> Review Date: Jun 15th, 2021
> Intended Status: Standards Track
> =20
> Summary:
> =20
> This document has some issues that should be at least considered prior =
to publication.
> =20
> Comments:
> =20
> =20
> Major issues:
> =20
> =C2=B7         Considering the SPF Status attribute TLV has the same =
type for Node, Link and Prefix NLRI, it is implied that a BGP update =
message can only contain a single kind of NLRI (for example, Node or =
Link). I=E2=80=99d suggest make the draft explicitly state it.
> =20
> I=E2=80=99ve added a paragraph on this in 5.1.1. If we were to make =
this a restriction, we=E2=80=99d need to discuss in WG.=20
> =20
> =20
> =20
> =C2=B7         About SPF Status TLV, use the Node NLRI as an example =
(section 5.2.1.2), it says in the draft: =E2=80=9CIf the SPF Status TLV =
is not included with the Node NLRI, the node is considered to be up and =
is available for transit traffic.=E2=80=9D, then later, =E2=80=9CIf a =
BGP speaker received the Node NLRI but the SPF Status TLV is not =
received, then any previously received information is considered as =
implicitly withdrawn and the update is propagated to other BGP speakers. =
=E2=80=9C. These two statements seem to conflict.
> =20
> I=E2=80=99ve fixed this for all the status TLVs.=20
> =20
> =20
> Comments inline:
> =20
> [Line numbers from idnits]
> =20
> 78       5.2.1.  Node NLRI Usage . . . . . . . . . . . . . . . . . . . =
 11
> 79         5.2.1.1.  Node NLRI Attribute SPF Capability TLV  . . . . . =
 11
> 80         5.2.1.2.  BGP-LS-SPF Node NLRI Attribute SPF Status TLV . . =
 12
> =20
> [Minor]: section 5.2.1.1 should be changed to "BGP-LS-SPF Node NLRI =
Attribute SPF Capability TLV" to be consistent with other titles.
> Fixed.=20
> =20
> 226   Another potential advantage of BGP SPF is that both IPv6 and =
IPv4 can
> 227   both be supported using the BGP-LS-SPF SAFI with the same =
BGP-LS-SPF
> 228   NLRIs. =20
> =20
> [Minor]: potential advantage? I'd suggest remove "potential".
> [nits]: both IPv6 and IPv4 can both be supported
> =20
> Fixed both.
> =20
> =20
> 315   The BGP SPF extensions reuse the Node, Link, and Prefix NLRI =
defined
> 316   in [RFC7752].  The usage of the BGP-LS NLRI, metric attributes, =
and
> 317   attribute extensions is described in Section 5.2.1.
> =20
> [minor]: metric attributes? Might be better just remove it.
> s/Section 5.2.1/Section 5.2
> =20
> Changed to just =E2=80=9Cattributes=E2=80=9D and fixed reference.
> =20
> =20
> 357   hop sessions) and the direct connection discovery and liveliness
> 358   detection for the interconnecting links are independent of the =
BGP
> 359   protocol.  the scope of this document.  For example, liveliness
> =20
> [nits]: unfinished sentence: the scope of this document.
> =20
> Removed.
> =20
> =20
> 470 5.2.  Extensions to BGP-LS
> =20
> 472   [RFC7752] describes a mechanism by which link-state and TE
> 473   information can be collected from IGPs and shared with external
> 474   components using the BGP protocol.  It describes both the =
definition
> 475   of the BGP-LS-SPF NLRI that advertise links, nodes, and prefixes
> 476   comprising IGP link-state information and the definition of a =
BGP
> 477   path attribute (BGP-LS attribute) that carries link, node, and =
prefix
> =20
> [Major]: line 475: should be "BGP-LS NLRI"
> =20
> Good catch =E2=80=93 fixed.
> =20
> =20
> 556   If the SPF Status TLV is received and the corresponding Node =
NLRI has
> 557   not been received, then the SPF Status TLV is ignored and not =
used in
> 558   SPF computation but is still announced to other BGP speakers.  =
An
> 559   implementation MAY log an error for further analysis.  If a BGP
> 560   speaker received the Node NLRI but the SPF Status TLV is not
> 561   received, then any previously received information is considered =
as
> 562   implicitly withdrawn and the update is propagated to other BGP
> 563   speakers.  A BGP speaker receiving a BGP Update containing a SPF
> 564   Status TLV in the BGP-LS attribute [RFC7752] with a value that =
is
> 565   outside the range of defined values SHOULD be processed and =
announced
> 566   to other BGP speakers.  However, a BGP speaker MUST not use the
> 567   Status TLV in its SPF computation.  An implementation MAY log =
this
> 568   condition for further analysis.
> =20
> [nits]: s/MUST not/MUST NOT
> [minor]: s/BGP speaker/BGP SPF speaker
> There are multi places in the draft using "BGP speaker" instead of =
"BGP SPF speaker", please go over and fix when applicable.
> For example:=20
> 1408   excessive SPF calculations.  When a BGP speaker detects that =
its
> section 7.1
> =20
> Used =E2=80=9CBGP SPF Speaker=E2=80=9D consistently and fixed several =
=E2=80=9CMUST not=E2=80=9D instances.
> =20
> =20
> 864   When a BGP SPF speaker completely loses its sequence number =
state,
> 865   i.e., due to a cold start, or in the unlikely possibility that =
that
> =20
> [nits]: extra "that".
> =20
> Removed.
> =20
> =20
> 943   o  Local Route Information Base (LOC-RIB) - This routing table
> 944       contains reachability information (i.e., next hops) for all
> 945       prefixes (both IPv4 and IPv6) as well as BGP-LS-SPF node
> 946       reachability.  Implementations may choose to implement this =
with
> 947       separate RIBs for each address family and/or Prefix versus =
Node
> 948       reachability.  It is synonymous with the Loc-RIB specified =
in
> 949       [RFC4271].
> =20
> [nits]: s/Loc-RIB/LOC-RIB
> =20
> In this case, RFC 4271 uses =E2=80=9CLoc-RIB=E2=80=9D.
> =20
> =20
> 1017       *  If the Current-Prefix's corresponding prefix is in the =
LOC-RIB
> 1018           and the cost is less than the current route's metric, =
the
> =20
> [major]: I think this meant to be "more than the current route's =
metric"
> =20
> Clarified this so that there is no ambiguity as to which metric is =
referenced.
> =20
> =20
> 1134   operate today (i.e., "Ships-in-the-Night" mode).  There is no
> 1135   implicit route redistribution between the BGP address families.
> =20
> [major]: what about redistribution from other protocols, say OSPF? =20
> =20
> This has typically been out of scope in routing protocol documents =E2=80=
=93 although I just saw a new draft dealing with BGP redistribution. In =
any case, I think this topic would warrant further discussion in a =
different draft.=20
> =20
> 1167   prior to withdrawal.  If the link becomes available in that =
period,
> 1168   the originator of the BGP-LS-SPF LINK NLRI SHOULD advertise a =
more
> 1169   recent version of the BGP-LS-SPF Link NLRI without the SPF =
Status TLV
> 1170   in the BGP-LS Link Attributes.=20
> =20
> [major]: "without SPF Status TLV", this is related with the second =
=E2=80=9CMajor issues=E2=80=9D above.
> =20
> Since all the SPF Status conditions indicate unreachability or a =
degraded state, this is correct. =20
> =20
> =20
> 1263   A BGP-LS-SPF Speaker MUST perform the following syntactic =
validation
> 1264   of the BGP-LS-SPF NLRI to determine if it is malformed.
> =20
> [minor]: there are a few places in the draft using "BGP-LS-SPF =
Speaker|speaker", may change to "BGP SPF speaker"?
> =20
> Yup =E2=80=93 fixed all these.
> =20
> =20
> 1425   Within a BGP SPF Routing Domain, the IGP metrics for all =
advertised
> 1426   links SHOULD be configured or defaulted consistently.=20
> =20
> [major]: in section 5.2.2, it says "One possible default for metric
>    would be to give each interface a cost of 1 making it effectively a
>    hop count.". Why not define a default value so all implementations =
will be consistent?
> =20
> We discussed and don=E2=80=99t want to add a default as different =
deployments could have totally different requirements. Also, other IGPs =
don=E2=80=99t have default metrics (at least, the link-state ones).=20
> =20
> Thanks,
> Acee


--Apple-Mail=_B29582CB-B8A7-443A-8324-A2566C128347
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hi =
Acee,<div class=3D""><br class=3D""></div><div class=3D"">Thanks for =
addressing my comments. I had a quick look at the changes in version =
-14, and have a question about the following comment. The change done =
does make the second point clear, but my original comment was about the =
fourth point. Please also consider make the term consistent, =
=E2=80=9CCurrent-Prefix=E2=80=99s=E2=80=9D vs. =E2=80=9Ccurrent =
route=E2=80=99s=E2=80=9D.</div><div class=3D""><br class=3D""></div><div =
class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1;"><div class=3D""><div =
class=3D"" style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);"><span class=3D"" style=3D"font-size: 10.5pt; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, =
26);">&nbsp;</span></div></div><div class=3D""><div class=3D"" =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);"><span =
class=3D"" style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26);">1017<span =
class=3D"apple-tab-span">&nbsp;</span>&nbsp; &nbsp; &nbsp; *&nbsp; If =
the Current-Prefix's corresponding prefix is in the LOC-RIB<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div class=3D"" =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);"><span =
class=3D"" style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26);">1018<span =
class=3D"apple-tab-span">&nbsp;</span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
and the cost is less than the current route's metric, the<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div class=3D"" =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);"><span =
class=3D"" style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; =
color: rgb(26, 26, 26);">&nbsp;</span></div></div><div class=3D""><div =
class=3D"" style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);"><span class=3D"" style=3D"font-size: 10.5pt; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26);">[major]: I think this =
meant to be "more than the current route's metric"<o:p =
class=3D""></o:p></span></div><div class=3D"" style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
rgb(255, 253, 242);"><o:p class=3D"">&nbsp;</o:p></div><div class=3D"" =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);"><span class=3D"">Clarified this =
so that there is no ambiguity as to which metric is =
referenced.</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
class=3D"" style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);"><span class=3D"" style=3D"font-size: 10.5pt; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, =
26);">&nbsp;</span></div></div></div></blockquote><div class=3D""><br =
class=3D""></div><div class=3D"">Thanks,</div><div =
class=3D"">Yingzhen</div><div class=3D""><br class=3D""></div><br =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Jun 30, 2021, at 8:09 AM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" class=3D"">acee@cisco.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><meta =
charset=3D"UTF-8" class=3D""><div class=3D"WordSection1" style=3D"page: =
WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"><div style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Hi Yingzhen,<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Thanks for the review. =
We=E2=80=99ve incorporated most of your comments into the -14 =
version.<o:p class=3D""></o:p></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"border-style: solid none =
none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in 0in =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D""><span style=3D"font-size: 12pt;" class=3D"">From:<span =
class=3D"Apple-converted-space">&nbsp;</span></span></b><span =
style=3D"font-size: 12pt;" class=3D"">Yingzhen Qu &lt;<a =
href=3D"mailto:yingzhen.ietf@gmail.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">yingzhen.ietf@gmail.com</a>&gt;<br=
 class=3D""><b class=3D"">Date:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Tuesday, June 22, 2021 =
at 3:46 PM<br class=3D""><b class=3D"">To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Routing Directorate =
&lt;<a href=3D"mailto:rtg-dir@ietf.org" style=3D"color: blue; =
text-decoration: underline;" class=3D"">rtg-dir@ietf.org</a>&gt;, "<a =
href=3D"mailto:draft-ietf-lsvr-bgp-spf@ietf.org" style=3D"color: blue; =
text-decoration: underline;" =
class=3D"">draft-ietf-lsvr-bgp-spf@ietf.org</a>" &lt;<a =
href=3D"mailto:draft-ietf-lsvr-bgp-spf@ietf.org" style=3D"color: blue; =
text-decoration: underline;" =
class=3D"">draft-ietf-lsvr-bgp-spf@ietf.org</a>&gt;, "<a =
href=3D"mailto:lsvr@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">lsvr@ietf.org</a>" &lt;<a =
href=3D"mailto:lsvr@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">lsvr@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Cc:<span class=3D"Apple-converted-space">&nbsp;</span></b>"<a =
href=3D"mailto:guntervandeveldecc@icloud.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">guntervandeveldecc@icloud.com</a>"=
 &lt;<a href=3D"mailto:guntervandeveldecc@icloud.com" style=3D"color: =
blue; text-decoration: underline;" =
class=3D"">guntervandeveldecc@icloud.com</a>&gt;, Luc Andr=C3=A9 Burdet =
&lt;<a href=3D"mailto:laburdet.ietf@gmail.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">laburdet.ietf@gmail.com</a>&gt;, =
"Yemin (Amy)" &lt;<a href=3D"mailto:amy.yemin@huawei.com" style=3D"color: =
blue; text-decoration: underline;" =
class=3D"">amy.yemin@huawei.com</a>&gt;<br class=3D""><b =
class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Rtgdir Last Call review =
of draft-ietf-lsvr-bgp-spf-13<br class=3D""><b =
class=3D"">Resent-From:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>&lt;<a =
href=3D"mailto:alias-bounces@ietf.org" style=3D"color: blue; =
text-decoration: underline;" class=3D"">alias-bounces@ietf.org</a>&gt;<br =
class=3D""><b class=3D"">Resent-To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Acee Lindem &lt;<a =
href=3D"mailto:acee@cisco.com" style=3D"color: blue; text-decoration: =
underline;" class=3D"">acee@cisco.com</a>&gt;, Shawn Zandi &lt;<a =
href=3D"mailto:szandi@linkedin.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">szandi@linkedin.com</a>&gt;, Wim =
Henderickx &lt;<a href=3D"mailto:wim.henderickx@nokia.com" style=3D"color:=
 blue; text-decoration: underline;" =
class=3D"">wim.henderickx@nokia.com</a>&gt;, Keyur Patel &lt;<a =
href=3D"mailto:keyur@arrcus.com" style=3D"color: blue; text-decoration: =
underline;" class=3D"">keyur@arrcus.com</a>&gt;<br class=3D""><b =
class=3D"">Resent-Date:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Tuesday, June 22, 2021 =
at 3:45 PM<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">I have been selected as the Routing =
Directorate reviewer for this draft. The Routing Directorate seeks to =
review all routing or routing-related drafts as they pass through IETF =
last call and IESG review, and sometimes on special request. The purpose =
of the review is to provide assistance to the Routing ADs. For more =
information about the Routing Directorate, please see<a =
href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" =
style=3D"color: blue; text-decoration: underline;" class=3D""><span =
style=3D"color: rgb(46, 2, 164);" =
class=3D"">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</span></a>=
<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Although these comments =
are primarily for the use of the Routing ADs, it would be helpful if you =
could consider them along with any other IETF Last Call comments that =
you receive, and strive to resolve them through discussion or by =
updating the draft.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Document: =
draft-ietf-lsvr-bgp-spf<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Reviewer: Yingzhen =
Qu<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Review Date: Jun 15th, =
2021<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Intended Status: =
Standards Track<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Summary:<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">This document has some =
issues that should be at least considered prior to publication.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Comments:<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Major issues:<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div style=3D"margin: 0in 0in =
0in 1in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in; background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10pt; font-family: Symbol; color: rgb(26, 26, 26);" =
class=3D""><span class=3D"">=C2=B7<span style=3D"font-style: normal; =
font-variant-caps: normal; font-weight: normal; font-stretch: normal; =
font-size: 7pt; line-height: normal; font-family: &quot;Times New =
Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Considering<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>the SPF Status =
attribute TLV has the same type for Node, Link and Prefix NLRI, it is =
implied that a BGP update message can only contain a single kind of NLRI =
(for example, Node or Link). I=E2=80=99d suggest make the draft =
explicitly state it.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">I=E2=80=99ve added a paragraph on =
this in 5.1.1. If we were to make this a restriction, we=E2=80=99d need =
to discuss in WG.&nbsp;</span><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div style=3D"margin: 0in 0in =
0in 1in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Symbol;" class=3D""><span class=3D"">=C2=B7<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">About SPF Status TLV, use the Node NLRI as =
an example (section 5.2.1.2), it says in the draft: =E2=80=9C</span><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;;" =
class=3D"">If the SPF Status TLV is not included with the Node NLRI, the =
node is considered to be up and is available for transit traffic.<span =
style=3D"color: rgb(26, 26, 26);" class=3D"">=E2=80=9D, then later, =
=E2=80=9C</span>If a BGP speaker received the Node NLRI but the SPF =
Status TLV is not received, then any previously received information is =
considered as implicitly withdrawn and the update is propagated to other =
BGP speakers. =E2=80=9C. These two statements seem to conflict.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">I=E2=80=99ve fixed this =
for all the status TLVs.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div class=3D""><div style=3D"margin: 0in 0in 0in =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Comments inline:<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[Line numbers from =
idnits]<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">78<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
5.2.1.&nbsp; Node NLRI Usage . . . . . . . . . . . . . . . . . . .&nbsp; =
11<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">79<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
&nbsp; 5.2.1.1.&nbsp; Node NLRI Attribute SPF Capability TLV&nbsp; . . . =
. .&nbsp; 11<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">80<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
&nbsp; 5.2.1.2.&nbsp; BGP-LS-SPF Node NLRI Attribute SPF Status TLV . =
.&nbsp; 12<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[Minor]: section 5.2.1.1 =
should be changed to "BGP-LS-SPF Node NLRI Attribute SPF Capability TLV" =
to be consistent with other titles.<o:p class=3D""></o:p></span></div><div=
 style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif; background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"" class=3D"">Fixed.<span =
class=3D"Apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">226<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; Another =
potential advantage of BGP SPF is that both IPv6 and IPv4 can<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">227<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; both be =
supported using the BGP-LS-SPF SAFI with the same BGP-LS-SPF<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">228<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; NLRIs. =
&nbsp;<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[Minor]: potential =
advantage? I'd suggest remove "potential".<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[nits]: both IPv6 and IPv4 can both be =
supported<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
rgb(255, 253, 242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Fixed both.</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">315<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; The BGP SPF =
extensions reuse the Node, Link, and Prefix NLRI defined<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">316<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; in =
[RFC7752].&nbsp; The usage of the BGP-LS NLRI, metric attributes, =
and<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">317<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; attribute =
extensions is described in Section 5.2.1.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[minor]: metric =
attributes? Might be better just remove it.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">s/Section 5.2.1/Section 5.2<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Changed to just =E2=80=9Cattributes=E2=80=9D and fixed =
reference.</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">357<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; hop sessions) =
and the direct connection discovery and liveliness<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">358<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; detection for =
the interconnecting links are independent of the BGP<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">359<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; =
protocol.&nbsp; the scope of this document.&nbsp; For example, =
liveliness<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[nits]: unfinished =
sentence: the scope of this document.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Removed.</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">470<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>5.2.&nbsp; =
Extensions to BGP-LS<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">472<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; [RFC7752] =
describes a mechanism by which link-state and TE<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">473<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; information =
can be collected from IGPs and shared with external<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">474<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; components =
using the BGP protocol.&nbsp; It describes both the definition<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">475<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; of the =
BGP-LS-SPF NLRI that advertise links, nodes, and prefixes<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">476<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; comprising =
IGP link-state information and the definition of a BGP<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">477<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; path =
attribute (BGP-LS attribute) that carries link, node, and prefix<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[Major]: line 475: =
should be "BGP-LS NLRI"<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Good catch =E2=80=93 =
fixed.</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">556<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; If the SPF =
Status TLV is received and the corresponding Node NLRI has<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">557<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; not been =
received, then the SPF Status TLV is ignored and not used in<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">558<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; SPF =
computation but is still announced to other BGP speakers.&nbsp; An<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">559<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; =
implementation MAY log an error for further analysis.&nbsp; If a BGP<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">560<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; speaker =
received the Node NLRI but the SPF Status TLV is not<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">561<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; received, =
then any previously received information is considered as<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">562<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; implicitly =
withdrawn and the update is propagated to other BGP<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">563<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; =
speakers.&nbsp; A BGP speaker receiving a BGP Update containing a =
SPF<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">564<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; Status TLV in =
the BGP-LS attribute [RFC7752] with a value that is<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">565<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; outside the =
range of defined values SHOULD be processed and announced<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">566<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; to other BGP =
speakers.&nbsp; However, a BGP speaker MUST not use the<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">567<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; Status TLV in =
its SPF computation.&nbsp; An implementation MAY log this<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">568<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; condition for =
further analysis.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[nits]: s/MUST not/MUST =
NOT<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[minor]: s/BGP =
speaker/BGP SPF speaker<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">There are multi places =
in the draft using "BGP speaker" instead of "BGP SPF speaker", please go =
over and fix when applicable.<o:p class=3D""></o:p></span></div></div><div=
 class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">For example:&nbsp;<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1408<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; excessive SPF =
calculations.&nbsp; When a BGP speaker detects that its<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">section 7.1<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Used =E2=80=9CBGP SPF Speaker=E2=80=9D consistently and fixed =
several =E2=80=9CMUST not=E2=80=9D instances.</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">864<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; When a BGP =
SPF speaker completely loses its sequence number state,<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">865<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; i.e., due to =
a cold start, or in the unlikely possibility that that<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[nits]: extra =
"that".<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
rgb(255, 253, 242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Removed.</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">943<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; o&nbsp; Local =
Route Information Base (LOC-RIB) - This routing table<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">944<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
contains reachability information (i.e., next hops) for all<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">945<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
prefixes (both IPv4 and IPv6) as well as BGP-LS-SPF node<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">946<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
reachability.&nbsp; Implementations may choose to implement this =
with<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">947<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
separate RIBs for each address family and/or Prefix versus Node<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">948<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
reachability.&nbsp; It is synonymous with the Loc-RIB specified in<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">949<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
[RFC4271].<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[nits]: =
s/Loc-RIB/LOC-RIB<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">In this case, RFC 4271 uses =
=E2=80=9CLoc-RIB=E2=80=9D.</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">1017<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
*&nbsp; If the Current-Prefix's corresponding prefix is in the =
LOC-RIB<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">1018<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp; and the cost is less than the current route's metric, =
the<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[major]: I think this =
meant to be "more than the current route's metric"<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Clarified this so that there is no ambiguity as to which =
metric is referenced.</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">1134<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; operate today =
(i.e., "Ships-in-the-Night" mode).&nbsp; There is no<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1135<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; implicit =
route redistribution between the BGP address families.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[major]: what about =
redistribution from other protocols, say OSPF? &nbsp;<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">This has typically been out of scope in routing protocol =
documents =E2=80=93 although I just saw a new draft dealing with BGP =
redistribution. In any case, I think this topic would warrant further =
discussion in a different draft.<span =
class=3D"Apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">1167<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; prior to =
withdrawal.&nbsp; If the link becomes available in that period,<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1168<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; the =
originator of the BGP-LS-SPF LINK NLRI SHOULD advertise a more<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1169<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; recent =
version of the BGP-LS-SPF Link NLRI without the SPF Status TLV<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1170<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; in the BGP-LS =
Link Attributes.&nbsp;<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[major]: "without SPF =
Status TLV", this is related with the second =E2=80=9CMajor issues=E2=80=9D=
 above.<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
rgb(255, 253, 242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Since all the SPF Status conditions indicate unreachability =
or a degraded state, this is correct. &nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">1263<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; A BGP-LS-SPF =
Speaker MUST perform the following syntactic validation<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1264<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; of the =
BGP-LS-SPF NLRI to determine if it is malformed.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[minor]: there are a few =
places in the draft using "BGP-LS-SPF Speaker|speaker", may change to =
"BGP SPF speaker"?</span><span style=3D"font-size: 10.5pt; font-family: =
&quot;PT Mono&quot;;" class=3D""><o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Yup =E2=80=93 fixed all =
these.</span><o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">1425<span =
class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; Within a BGP =
SPF Routing Domain, the IGP metrics for all advertised<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1426<span class=3D"apple-tab-span"><span =
class=3D"Apple-converted-space">&nbsp;</span></span>&nbsp; links SHOULD =
be configured or defaulted consistently.&nbsp;<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[major]: in section =
5.2.2, it says "One possible default for metric<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;&nbsp; would be to give each =
interface a cost of 1 making it effectively a<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;&nbsp; hop count.". Why not define a =
default value so all implementations will be consistent?<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">We discussed and don=E2=80=99t want to add a default as =
different deployments could have totally different requirements. Also, =
other IGPs don=E2=80=99t have default metrics (at least, the link-state =
ones).<span class=3D"Apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
rgb(255, 253, 242);" class=3D""><span style=3D"" class=3D"">Thanks,<br =
class=3D"">Acee</span></div></div></div></div></blockquote></div><br =
class=3D""></div></body></html>=

--Apple-Mail=_B29582CB-B8A7-443A-8324-A2566C128347--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Yingzhen Qu <yingzhen.ietf@gmail.com>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-spf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org>, "guntervandeveldecc@icloud.com" <guntervandeveldecc@icloud.com>, =?utf-8?B?THVjIEFuZHLDqSBCdXJkZXQ=?= <laburdet.ietf@gmail.com>, "Yemin (Amy)" <amy.yemin@huawei.com>
Thread-Topic: Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
Thread-Index: AQHXZ59ANzP3r4lPy0uer8J93loFPasscX4AgACzPgD//+VpAA==
Date: Thu, 1 Jul 2021 00:15:42 +0000
Message-ID: <932A097A-5314-4DC1-97A7-0314FB70A4E4@cisco.com>
References: <305FC57A-8B6B-4718-B61E-A5E7D30431D1@gmail.com> <F6C9EA73-1BCF-4C3C-AC9E-9261D180C1C7@cisco.com> <8152FDDD-A8DE-4930-B53E-5A0D3E0ACF90@gmail.com>
In-Reply-To: <8152FDDD-A8DE-4930-B53E-5A0D3E0ACF90@gmail.com>
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From: Yingzhen Qu <yingzhen.ietf@gmail.com>
Message-Id: <859A82FB-4E85-4595-A0A2-87E811D39034@gmail.com>
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Date: Wed, 30 Jun 2021 17:37:20 -0700
In-Reply-To: <932A097A-5314-4DC1-97A7-0314FB70A4E4@cisco.com>
Cc: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-spf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org>, "guntervandeveldecc@icloud.com" <guntervandeveldecc@icloud.com>, =?utf-8?Q?Luc_Andr=C3=A9_Burdet?= <laburdet.ietf@gmail.com>, "Yemin (Amy)" <amy.yemin@huawei.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
References: <305FC57A-8B6B-4718-B61E-A5E7D30431D1@gmail.com> <F6C9EA73-1BCF-4C3C-AC9E-9261D180C1C7@cisco.com> <8152FDDD-A8DE-4930-B53E-5A0D3E0ACF90@gmail.com> <932A097A-5314-4DC1-97A7-0314FB70A4E4@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/NmnVjV6e8n6qbh-gdN5fGD_mwkE>
Subject: Re: [RTG-DIR] Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
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Hi Acee,

Thanks for the clarification. I thought =E2=80=9Ccurrent route=E2=80=9D =
meant =E2=80=9Cthe Current-Prefix=E2=80=99s=E2=80=9D, hence the =
confusion.

Thanks,
Yingzhen

> On Jun 30, 2021, at 5:15 PM, Acee Lindem (acee) <acee@cisco.com> =
wrote:
>=20
> Hi Yingzhen,=20
> =20
> From: Yingzhen Qu <yingzhen.ietf@gmail.com =
<mailto:yingzhen.ietf@gmail.com>>
> Date: Wednesday, June 30, 2021 at 5:51 PM
> To: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
> Cc: Routing Directorate <rtg-dir@ietf.org <mailto:rtg-dir@ietf.org>>, =
"draft-ietf-lsvr-bgp-spf@ietf.org =
<mailto:draft-ietf-lsvr-bgp-spf@ietf.org>" =
<draft-ietf-lsvr-bgp-spf@ietf.org =
<mailto:draft-ietf-lsvr-bgp-spf@ietf.org>>, "lsvr@ietf.org =
<mailto:lsvr@ietf.org>" <lsvr@ietf.org <mailto:lsvr@ietf.org>>, =
"guntervandeveldecc@icloud.com <mailto:guntervandeveldecc@icloud.com>" =
<guntervandeveldecc@icloud.com <mailto:guntervandeveldecc@icloud.com>>, =
Luc Andr=C3=A9 Burdet <laburdet.ietf@gmail.com =
<mailto:laburdet.ietf@gmail.com>>, "Yemin (Amy)" <amy.yemin@huawei.com =
<mailto:amy.yemin@huawei.com>>
> Subject: Re: Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
> =20
> Hi Acee,
> =20
> Thanks for addressing my comments. I had a quick look at the changes =
in version -14, and have a question about the following comment. The =
change done does make the second point clear, but my original comment =
was about the fourth point. Please also consider make the term =
consistent, =E2=80=9CCurrent-Prefix=E2=80=99s=E2=80=9D vs. =E2=80=9Ccurren=
t route=E2=80=99s=E2=80=9D.
> =20
> This is inconsistent but in the case =E2=80=9Ccurrent route=E2=80=99s=E2=
=80=9D should be =E2=80=9CLOC-RIB route=E2=80=99s=E2=80=9D to be correct =
with respect to the rule. There were two instances of this =
inconsistency. I will fix in the next revision along with a couple =
comments from Haibo.=20
> =20
> Thanks,
> Acee
> =20
>> =20
>> 1017       *  If the Current-Prefix's corresponding prefix is in the =
LOC-RIB
>> 1018           and the cost is less than the current route's metric, =
the
>> =20
>> [major]: I think this meant to be "more than the current route's =
metric"
>> =20
>> Clarified this so that there is no ambiguity as to which metric is =
referenced.
>> =20
> =20
> Thanks,
> Yingzhen
> =20
> =20
>=20
>=20
>> On Jun 30, 2021, at 8:09 AM, Acee Lindem (acee) <acee@cisco.com =
<mailto:acee@cisco.com>> wrote:
>> =20
>> Hi Yingzhen,=20
>> =20
>> Thanks for the review. We=E2=80=99ve incorporated most of your =
comments into the -14 version.
>> =20
>> From: Yingzhen Qu <yingzhen.ietf@gmail.com =
<mailto:yingzhen.ietf@gmail.com>>
>> Date: Tuesday, June 22, 2021 at 3:46 PM
>> To: Routing Directorate <rtg-dir@ietf.org <mailto:rtg-dir@ietf.org>>, =
"draft-ietf-lsvr-bgp-spf@ietf.org =
<mailto:draft-ietf-lsvr-bgp-spf@ietf.org>" =
<draft-ietf-lsvr-bgp-spf@ietf.org =
<mailto:draft-ietf-lsvr-bgp-spf@ietf.org>>, "lsvr@ietf.org =
<mailto:lsvr@ietf.org>" <lsvr@ietf.org <mailto:lsvr@ietf.org>>
>> Cc: "guntervandeveldecc@icloud.com =
<mailto:guntervandeveldecc@icloud.com>" <guntervandeveldecc@icloud.com =
<mailto:guntervandeveldecc@icloud.com>>, Luc Andr=C3=A9 Burdet =
<laburdet.ietf@gmail.com <mailto:laburdet.ietf@gmail.com>>, "Yemin =
(Amy)" <amy.yemin@huawei.com <mailto:amy.yemin@huawei.com>>
>> Subject: Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
>> Resent-From: <alias-bounces@ietf.org <mailto:alias-bounces@ietf.org>>
>> Resent-To: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, =
Shawn Zandi <szandi@linkedin.com <mailto:szandi@linkedin.com>>, Wim =
Henderickx <wim.henderickx@nokia.com <mailto:wim.henderickx@nokia.com>>, =
Keyur Patel <keyur@arrcus.com <mailto:keyur@arrcus.com>>
>> Resent-Date: Tuesday, June 22, 2021 at 3:45 PM
>> =20
>> I have been selected as the Routing Directorate reviewer for this =
draft. The Routing Directorate seeks to review all routing or =
routing-related drafts as they pass through IETF last call and IESG =
review, and sometimes on special request. The purpose of the review is =
to provide assistance to the Routing ADs. For more information about the =
Routing Directorate, please =
seehttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir =
<http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir>
>> =20
>> Although these comments are primarily for the use of the Routing ADs, =
it would be helpful if you could consider them along with any other IETF =
Last Call comments that you receive, and strive to resolve them through =
discussion or by updating the draft.
>> =20
>> Document: draft-ietf-lsvr-bgp-spf
>> Reviewer: Yingzhen Qu
>> Review Date: Jun 15th, 2021
>> Intended Status: Standards Track
>> =20
>> Summary:
>> =20
>> This document has some issues that should be at least considered =
prior to publication.
>> =20
>> Comments:
>> =20
>> =20
>> Major issues:
>> =20
>> =C2=B7         Considering the SPF Status attribute TLV has the same =
type for Node, Link and Prefix NLRI, it is implied that a BGP update =
message can only contain a single kind of NLRI (for example, Node or =
Link). I=E2=80=99d suggest make the draft explicitly state it.
>> =20
>> I=E2=80=99ve added a paragraph on this in 5.1.1. If we were to make =
this a restriction, we=E2=80=99d need to discuss in WG.=20
>> =20
>> =20
>> =20
>> =C2=B7         About SPF Status TLV, use the Node NLRI as an example =
(section 5.2.1.2), it says in the draft: =E2=80=9CIf the SPF Status TLV =
is not included with the Node NLRI, the node is considered to be up and =
is available for transit traffic.=E2=80=9D, then later, =E2=80=9CIf a =
BGP speaker received the Node NLRI but the SPF Status TLV is not =
received, then any previously received information is considered as =
implicitly withdrawn and the update is propagated to other BGP speakers. =
=E2=80=9C. These two statements seem to conflict.
>> =20
>> I=E2=80=99ve fixed this for all the status TLVs.=20
>> =20
>> =20
>> Comments inline:
>> =20
>> [Line numbers from idnits]
>> =20
>> 78       5.2.1.  Node NLRI Usage . . . . . . . . . . . . . . . . . . =
.  11
>> 79         5.2.1.1.  Node NLRI Attribute SPF Capability TLV  . . . . =
.  11
>> 80         5.2.1.2.  BGP-LS-SPF Node NLRI Attribute SPF Status TLV . =
.  12
>> =20
>> [Minor]: section 5.2.1.1 should be changed to "BGP-LS-SPF Node NLRI =
Attribute SPF Capability TLV" to be consistent with other titles.
>> Fixed.=20
>> =20
>> 226   Another potential advantage of BGP SPF is that both IPv6 and =
IPv4 can
>> 227   both be supported using the BGP-LS-SPF SAFI with the same =
BGP-LS-SPF
>> 228   NLRIs. =20
>> =20
>> [Minor]: potential advantage? I'd suggest remove "potential".
>> [nits]: both IPv6 and IPv4 can both be supported
>> =20
>> Fixed both.
>> =20
>> =20
>> 315   The BGP SPF extensions reuse the Node, Link, and Prefix NLRI =
defined
>> 316   in [RFC7752].  The usage of the BGP-LS NLRI, metric attributes, =
and
>> 317   attribute extensions is described in Section 5.2.1.
>> =20
>> [minor]: metric attributes? Might be better just remove it.
>> s/Section 5.2.1/Section 5.2
>> =20
>> Changed to just =E2=80=9Cattributes=E2=80=9D and fixed reference.
>> =20
>> =20
>> 357   hop sessions) and the direct connection discovery and =
liveliness
>> 358   detection for the interconnecting links are independent of the =
BGP
>> 359   protocol.  the scope of this document.  For example, liveliness
>> =20
>> [nits]: unfinished sentence: the scope of this document.
>> =20
>> Removed.
>> =20
>> =20
>> 470 5.2.  Extensions to BGP-LS
>> =20
>> 472   [RFC7752] describes a mechanism by which link-state and TE
>> 473   information can be collected from IGPs and shared with external
>> 474   components using the BGP protocol.  It describes both the =
definition
>> 475   of the BGP-LS-SPF NLRI that advertise links, nodes, and =
prefixes
>> 476   comprising IGP link-state information and the definition of a =
BGP
>> 477   path attribute (BGP-LS attribute) that carries link, node, and =
prefix
>> =20
>> [Major]: line 475: should be "BGP-LS NLRI"
>> =20
>> Good catch =E2=80=93 fixed.
>> =20
>> =20
>> 556   If the SPF Status TLV is received and the corresponding Node =
NLRI has
>> 557   not been received, then the SPF Status TLV is ignored and not =
used in
>> 558   SPF computation but is still announced to other BGP speakers.  =
An
>> 559   implementation MAY log an error for further analysis.  If a BGP
>> 560   speaker received the Node NLRI but the SPF Status TLV is not
>> 561   received, then any previously received information is =
considered as
>> 562   implicitly withdrawn and the update is propagated to other BGP
>> 563   speakers.  A BGP speaker receiving a BGP Update containing a =
SPF
>> 564   Status TLV in the BGP-LS attribute [RFC7752] with a value that =
is
>> 565   outside the range of defined values SHOULD be processed and =
announced
>> 566   to other BGP speakers.  However, a BGP speaker MUST not use the
>> 567   Status TLV in its SPF computation.  An implementation MAY log =
this
>> 568   condition for further analysis.
>> =20
>> [nits]: s/MUST not/MUST NOT
>> [minor]: s/BGP speaker/BGP SPF speaker
>> There are multi places in the draft using "BGP speaker" instead of =
"BGP SPF speaker", please go over and fix when applicable.
>> For example:=20
>> 1408   excessive SPF calculations.  When a BGP speaker detects that =
its
>> section 7.1
>> =20
>> Used =E2=80=9CBGP SPF Speaker=E2=80=9D consistently and fixed several =
=E2=80=9CMUST not=E2=80=9D instances.
>> =20
>> =20
>> 864   When a BGP SPF speaker completely loses its sequence number =
state,
>> 865   i.e., due to a cold start, or in the unlikely possibility that =
that
>> =20
>> [nits]: extra "that".
>> =20
>> Removed.
>> =20
>> =20
>> 943   o  Local Route Information Base (LOC-RIB) - This routing table
>> 944       contains reachability information (i.e., next hops) for all
>> 945       prefixes (both IPv4 and IPv6) as well as BGP-LS-SPF node
>> 946       reachability.  Implementations may choose to implement this =
with
>> 947       separate RIBs for each address family and/or Prefix versus =
Node
>> 948       reachability.  It is synonymous with the Loc-RIB specified =
in
>> 949       [RFC4271].
>> =20
>> [nits]: s/Loc-RIB/LOC-RIB
>> =20
>> In this case, RFC 4271 uses =E2=80=9CLoc-RIB=E2=80=9D.
>> =20
>> =20
>> 1017       *  If the Current-Prefix's corresponding prefix is in the =
LOC-RIB
>> 1018           and the cost is less than the current route's metric, =
the
>> =20
>> [major]: I think this meant to be "more than the current route's =
metric"
>> =20
>> Clarified this so that there is no ambiguity as to which metric is =
referenced.
>> =20
>> =20
>> 1134   operate today (i.e., "Ships-in-the-Night" mode).  There is no
>> 1135   implicit route redistribution between the BGP address =
families.
>> =20
>> [major]: what about redistribution from other protocols, say OSPF? =20=

>> =20
>> This has typically been out of scope in routing protocol documents =
=E2=80=93 although I just saw a new draft dealing with BGP =
redistribution. In any case, I think this topic would warrant further =
discussion in a different draft.=20
>> =20
>> 1167   prior to withdrawal.  If the link becomes available in that =
period,
>> 1168   the originator of the BGP-LS-SPF LINK NLRI SHOULD advertise a =
more
>> 1169   recent version of the BGP-LS-SPF Link NLRI without the SPF =
Status TLV
>> 1170   in the BGP-LS Link Attributes.=20
>> =20
>> [major]: "without SPF Status TLV", this is related with the second =
=E2=80=9CMajor issues=E2=80=9D above.
>> =20
>> Since all the SPF Status conditions indicate unreachability or a =
degraded state, this is correct. =20
>> =20
>> =20
>> 1263   A BGP-LS-SPF Speaker MUST perform the following syntactic =
validation
>> 1264   of the BGP-LS-SPF NLRI to determine if it is malformed.
>> =20
>> [minor]: there are a few places in the draft using "BGP-LS-SPF =
Speaker|speaker", may change to "BGP SPF speaker"?
>> =20
>> Yup =E2=80=93 fixed all these.
>> =20
>> =20
>> 1425   Within a BGP SPF Routing Domain, the IGP metrics for all =
advertised
>> 1426   links SHOULD be configured or defaulted consistently.=20
>> =20
>> [major]: in section 5.2.2, it says "One possible default for metric
>>    would be to give each interface a cost of 1 making it effectively =
a
>>    hop count.". Why not define a default value so all implementations =
will be consistent?
>> =20
>> We discussed and don=E2=80=99t want to add a default as different =
deployments could have totally different requirements. Also, other IGPs =
don=E2=80=99t have default metrics (at least, the link-state ones).=20
>> =20
>> Thanks,
>> Acee


--Apple-Mail=_27A5A589-9BBA-4B72-AD64-0B77C812BFEE
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hi =
Acee,<div class=3D""><br class=3D""></div><div class=3D"">Thanks for the =
clarification. I thought =E2=80=9Ccurrent route=E2=80=9D meant =E2=80=9Cth=
e Current-Prefix=E2=80=99s=E2=80=9D, hence the confusion.</div><div =
class=3D""><br class=3D""></div><div class=3D"">Thanks,</div><div =
class=3D"">Yingzhen<br class=3D""><div><br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D"">On Jun 30, 2021, at 5:15 PM, =
Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" =
class=3D"">acee@cisco.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><meta =
charset=3D"UTF-8" class=3D""><div class=3D"WordSection1" style=3D"page: =
WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"><div style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Hi Yingzhen,<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"border-style: solid none =
none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in 0in =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D""><span style=3D"font-size: 12pt;" class=3D"">From:<span =
class=3D"Apple-converted-space">&nbsp;</span></span></b><span =
style=3D"font-size: 12pt;" class=3D"">Yingzhen Qu &lt;<a =
href=3D"mailto:yingzhen.ietf@gmail.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">yingzhen.ietf@gmail.com</a>&gt;<br=
 class=3D""><b class=3D"">Date:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Wednesday, June 30, =
2021 at 5:51 PM<br class=3D""><b class=3D"">To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Acee Lindem &lt;<a =
href=3D"mailto:acee@cisco.com" style=3D"color: blue; text-decoration: =
underline;" class=3D"">acee@cisco.com</a>&gt;<br class=3D""><b =
class=3D"">Cc:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Routing Directorate =
&lt;<a href=3D"mailto:rtg-dir@ietf.org" style=3D"color: blue; =
text-decoration: underline;" class=3D"">rtg-dir@ietf.org</a>&gt;, "<a =
href=3D"mailto:draft-ietf-lsvr-bgp-spf@ietf.org" style=3D"color: blue; =
text-decoration: underline;" =
class=3D"">draft-ietf-lsvr-bgp-spf@ietf.org</a>" &lt;<a =
href=3D"mailto:draft-ietf-lsvr-bgp-spf@ietf.org" style=3D"color: blue; =
text-decoration: underline;" =
class=3D"">draft-ietf-lsvr-bgp-spf@ietf.org</a>&gt;, "<a =
href=3D"mailto:lsvr@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">lsvr@ietf.org</a>" &lt;<a =
href=3D"mailto:lsvr@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">lsvr@ietf.org</a>&gt;, "<a =
href=3D"mailto:guntervandeveldecc@icloud.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">guntervandeveldecc@icloud.com</a>"=
 &lt;<a href=3D"mailto:guntervandeveldecc@icloud.com" style=3D"color: =
blue; text-decoration: underline;" =
class=3D"">guntervandeveldecc@icloud.com</a>&gt;, Luc Andr=C3=A9 Burdet =
&lt;<a href=3D"mailto:laburdet.ietf@gmail.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">laburdet.ietf@gmail.com</a>&gt;, =
"Yemin (Amy)" &lt;<a href=3D"mailto:amy.yemin@huawei.com" style=3D"color: =
blue; text-decoration: underline;" =
class=3D"">amy.yemin@huawei.com</a>&gt;<br class=3D""><b =
class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Re: Rtgdir Last Call =
review of draft-ietf-lsvr-bgp-spf-13<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">Hi Acee,<o:p class=3D""></o:p></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">Thanks for addressing my comments. I had a quick look at the =
changes in version -14, and have a question about the following comment. =
The change done does make the second point clear, but my original =
comment was about the fourth point. Please also consider make the term =
consistent, =E2=80=9CCurrent-Prefix=E2=80=99s=E2=80=9D vs. =E2=80=9Ccurren=
t route=E2=80=99s=E2=80=9D.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">This is inconsistent but in the case =E2=80=9Ccurr=
ent route=E2=80=99s=E2=80=9D should be =E2=80=9CLOC-RIB route=E2=80=99s=E2=
=80=9D to be correct with respect to the rule. There were two instances =
of this inconsistency. I will fix in the next revision along with a =
couple comments from Haibo.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Thanks,<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Acee<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div =
class=3D""><blockquote style=3D"margin-top: 5pt; margin-bottom: 5pt;" =
class=3D"" type=3D"cite"><div class=3D""><div style=3D"margin-left: =
0.5in;" class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-size: 10.5pt; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p=
 class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1017<span =
class=3D"apple-tab-span">&nbsp;</span>&nbsp; &nbsp; &nbsp; *&nbsp; If =
the Current-Prefix's corresponding prefix is in the LOC-RIB</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1018<span =
class=3D"apple-tab-span">&nbsp;</span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
and the cost is less than the current route's metric, the</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[major]: I think this meant to be "more =
than the current route's metric"</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Clarified this so that there is =
no ambiguity as to which metric is referenced.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div></blockquote><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">Thanks,<o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Yingzhen<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div style=3D"margin: =
0in 0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><br class=3D""><br class=3D""><o:p =
class=3D""></o:p></div><blockquote style=3D"margin-top: 5pt; =
margin-bottom: 5pt;" class=3D"" type=3D"cite"><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">On Jun 30, 2021, at 8:09 AM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" style=3D"color: =
blue; text-decoration: underline;" class=3D"">acee@cisco.com</a>&gt; =
wrote:<o:p class=3D""></o:p></div></div><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div><div class=3D""><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Hi Yingzhen,<span =
class=3D"apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Thanks for the review. We=E2=80=99ve =
incorporated most of your comments into the -14 version.<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div></div><div =
style=3D"border-style: solid none none; border-top-width: 1pt; =
border-top-color: rgb(181, 196, 223); padding: 3pt 0in 0in;" =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><b class=3D""><span style=3D"font-size: =
12pt;" class=3D"">From:<span =
class=3D"apple-converted-space">&nbsp;</span></span></b><span =
style=3D"font-size: 12pt;" class=3D"">Yingzhen Qu &lt;<a =
href=3D"mailto:yingzhen.ietf@gmail.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">yingzhen.ietf@gmail.com</a>&gt;<br=
 class=3D""><b class=3D"">Date:<span =
class=3D"apple-converted-space">&nbsp;</span></b>Tuesday, June 22, 2021 =
at 3:46 PM<br class=3D""><b class=3D"">To:<span =
class=3D"apple-converted-space">&nbsp;</span></b>Routing Directorate =
&lt;<a href=3D"mailto:rtg-dir@ietf.org" style=3D"color: blue; =
text-decoration: underline;" class=3D"">rtg-dir@ietf.org</a>&gt;, "<a =
href=3D"mailto:draft-ietf-lsvr-bgp-spf@ietf.org" style=3D"color: blue; =
text-decoration: underline;" =
class=3D"">draft-ietf-lsvr-bgp-spf@ietf.org</a>" &lt;<a =
href=3D"mailto:draft-ietf-lsvr-bgp-spf@ietf.org" style=3D"color: blue; =
text-decoration: underline;" =
class=3D"">draft-ietf-lsvr-bgp-spf@ietf.org</a>&gt;, "<a =
href=3D"mailto:lsvr@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">lsvr@ietf.org</a>" &lt;<a =
href=3D"mailto:lsvr@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">lsvr@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Cc:<span class=3D"apple-converted-space">&nbsp;</span></b>"<a =
href=3D"mailto:guntervandeveldecc@icloud.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">guntervandeveldecc@icloud.com</a>"=
 &lt;<a href=3D"mailto:guntervandeveldecc@icloud.com" style=3D"color: =
blue; text-decoration: underline;" =
class=3D"">guntervandeveldecc@icloud.com</a>&gt;, Luc Andr=C3=A9 Burdet =
&lt;<a href=3D"mailto:laburdet.ietf@gmail.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">laburdet.ietf@gmail.com</a>&gt;, =
"Yemin (Amy)" &lt;<a href=3D"mailto:amy.yemin@huawei.com" style=3D"color: =
blue; text-decoration: underline;" =
class=3D"">amy.yemin@huawei.com</a>&gt;<br class=3D""><b =
class=3D"">Subject:<span =
class=3D"apple-converted-space">&nbsp;</span></b>Rtgdir Last Call review =
of draft-ietf-lsvr-bgp-spf-13<br class=3D""><b =
class=3D"">Resent-From:<span =
class=3D"apple-converted-space">&nbsp;</span></b>&lt;<a =
href=3D"mailto:alias-bounces@ietf.org" style=3D"color: blue; =
text-decoration: underline;" class=3D"">alias-bounces@ietf.org</a>&gt;<br =
class=3D""><b class=3D"">Resent-To:<span =
class=3D"apple-converted-space">&nbsp;</span></b>Acee Lindem &lt;<a =
href=3D"mailto:acee@cisco.com" style=3D"color: blue; text-decoration: =
underline;" class=3D"">acee@cisco.com</a>&gt;, Shawn Zandi &lt;<a =
href=3D"mailto:szandi@linkedin.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">szandi@linkedin.com</a>&gt;, Wim =
Henderickx &lt;<a href=3D"mailto:wim.henderickx@nokia.com" style=3D"color:=
 blue; text-decoration: underline;" =
class=3D"">wim.henderickx@nokia.com</a>&gt;, Keyur Patel &lt;<a =
href=3D"mailto:keyur@arrcus.com" style=3D"color: blue; text-decoration: =
underline;" class=3D"">keyur@arrcus.com</a>&gt;<br class=3D""><b =
class=3D"">Resent-Date:<span =
class=3D"apple-converted-space">&nbsp;</span></b>Tuesday, June 22, 2021 =
at 3:45 PM</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">I have been selected as the Routing =
Directorate reviewer for this draft. The Routing Directorate seeks to =
review all routing or routing-related drafts as they pass through IETF =
last call and IESG review, and sometimes on special request. The purpose =
of the review is to provide assistance to the Routing ADs. For more =
information about the Routing Directorate, please see<a =
href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" =
style=3D"color: blue; text-decoration: underline;" class=3D""><span =
style=3D"color: rgb(46, 2, 164);" =
class=3D"">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</span></a>=
</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Although these comments are primarily for =
the use of the Routing ADs, it would be helpful if you could consider =
them along with any other IETF Last Call comments that you receive, and =
strive to resolve them through discussion or by updating the =
draft.</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Document: =
draft-ietf-lsvr-bgp-spf</span><o:p class=3D""></o:p></div></div></div><div=
 class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">Reviewer: Yingzhen =
Qu</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Review Date: Jun 15th, 2021</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Intended Status: Standards Track</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Summary:</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">This document has some issues that should =
be at least considered prior to publication.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Comments:</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Major issues:</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div style=3D"margin-left: 1in;" =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; text-indent: -0.25in; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10pt; font-family: Symbol; color: rgb(26, 26, 26);" =
class=3D"">=C2=B7</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif; color: rgb(26, 26, 26);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Considering<span =
class=3D"apple-converted-space">&nbsp;</span>the SPF Status attribute =
TLV has the same type for Node, Link and Prefix NLRI, it is implied that =
a BGP update message can only contain a single kind of NLRI (for =
example, Node or Link). I=E2=80=99d suggest make the draft explicitly =
state it.</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">I=E2=80=99ve added a paragraph on this in 5.1.1. If we were =
to make this a restriction, we=E2=80=99d need to discuss in =
WG.&nbsp;</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div style=3D"margin-left: 1in;" =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Symbol;" class=3D"">=C2=B7</span><s=
pan style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">About SPF Status TLV, use the Node NLRI as =
an example (section 5.2.1.2), it says in the draft: =E2=80=9C</span><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;;" =
class=3D"">If the SPF Status TLV is not included with the Node NLRI, the =
node is considered to be up and is available for transit traffic.<span =
style=3D"color: rgb(26, 26, 26);" class=3D"">=E2=80=9D, then later, =
=E2=80=9C</span>If a BGP speaker received the Node NLRI but the SPF =
Status TLV is not received, then any previously received information is =
considered as implicitly withdrawn and the update is propagated to other =
BGP speakers. =E2=80=9C. These two statements seem to =
conflict.</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">I=E2=80=99ve fixed this for all the status TLVs.<span =
class=3D"apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin-left: =
0.5in;" class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: =
11pt; font-family: Calibri, sans-serif; background-color: rgb(255, 253, =
242);" class=3D""><span style=3D"font-size: 10.5pt; font-family: =
&quot;PT Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p=
 class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">Comments inline:</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[Line numbers from idnits]</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">78<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
5.2.1.&nbsp; Node NLRI Usage . . . . . . . . . . . . . . . . . . .&nbsp; =
11</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">79<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; &nbsp; =
5.2.1.1.&nbsp; Node NLRI Attribute SPF Capability TLV&nbsp; . . . . =
.&nbsp; 11</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">80<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; &nbsp; =
5.2.1.2.&nbsp; BGP-LS-SPF Node NLRI Attribute SPF Status TLV . .&nbsp; =
12</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[Minor]: section 5.2.1.1 should be changed =
to "BGP-LS-SPF Node NLRI Attribute SPF Capability TLV" to be consistent =
with other titles.</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Fixed.<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">226<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; Another potential =
advantage of BGP SPF is that both IPv6 and IPv4 can</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">227<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; both be supported =
using the BGP-LS-SPF SAFI with the same BGP-LS-SPF</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">228<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; NLRIs. =
&nbsp;</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[Minor]: potential advantage? I'd suggest =
remove "potential".</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">[nits]: both IPv6 and =
IPv4 can both be supported</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Fixed both.</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">315<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; The BGP SPF =
extensions reuse the Node, Link, and Prefix NLRI defined</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">316<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; in [RFC7752].&nbsp; =
The usage of the BGP-LS NLRI, metric attributes, and</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">317<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; attribute extensions =
is described in Section 5.2.1.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[minor]: metric attributes? Might be better =
just remove it.</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">s/Section 5.2.1/Section =
5.2</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Changed to just =E2=80=9Cattributes=E2=80=9D and fixed =
reference.</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">357<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; hop sessions) and =
the direct connection discovery and liveliness</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">358<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; detection for the =
interconnecting links are independent of the BGP</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">359<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; protocol.&nbsp; the =
scope of this document.&nbsp; For example, liveliness</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[nits]: unfinished sentence: the scope of =
this document.</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Removed.</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">470<span =
class=3D"apple-converted-space">&nbsp;</span>5.2.&nbsp; Extensions to =
BGP-LS</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">472<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; [RFC7752] describes =
a mechanism by which link-state and TE</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">473<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; information can be =
collected from IGPs and shared with external</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">474<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; components using the =
BGP protocol.&nbsp; It describes both the definition</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">475<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; of the BGP-LS-SPF =
NLRI that advertise links, nodes, and prefixes</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">476<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; comprising IGP =
link-state information and the definition of a BGP</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">477<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; path attribute =
(BGP-LS attribute) that carries link, node, and prefix</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[Major]: line 475: should be "BGP-LS =
NLRI"</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Good catch =E2=80=93 fixed.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">556<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; If the SPF Status =
TLV is received and the corresponding Node NLRI has</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">557<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; not been received, =
then the SPF Status TLV is ignored and not used in</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">558<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; SPF computation but =
is still announced to other BGP speakers.&nbsp; An</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">559<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; implementation MAY =
log an error for further analysis.&nbsp; If a BGP</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">560<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; speaker received the =
Node NLRI but the SPF Status TLV is not</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">561<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; received, then any =
previously received information is considered as</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">562<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; implicitly withdrawn =
and the update is propagated to other BGP</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">563<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; speakers.&nbsp; A =
BGP speaker receiving a BGP Update containing a SPF</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">564<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; Status TLV in the =
BGP-LS attribute [RFC7752] with a value that is</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">565<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; outside the range of =
defined values SHOULD be processed and announced</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">566<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; to other BGP =
speakers.&nbsp; However, a BGP speaker MUST not use the</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">567<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; Status TLV in its =
SPF computation.&nbsp; An implementation MAY log this</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">568<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; condition for =
further analysis.</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[nits]: s/MUST not/MUST NOT</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[minor]: s/BGP speaker/BGP SPF =
speaker</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div=
 style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">There are multi places in the draft using =
"BGP speaker" instead of "BGP SPF speaker", please go over and fix when =
applicable.</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">For =
example:&nbsp;</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">1408<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; excessive SPF =
calculations.&nbsp; When a BGP speaker detects that its</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">section 7.1</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Used =E2=80=9CBGP SPF Speaker=E2=80=
=9D consistently and fixed several =E2=80=9CMUST not=E2=80=9D =
instances.</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">864<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; When a BGP SPF =
speaker completely loses its sequence number state,</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">865<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; i.e., due to a cold =
start, or in the unlikely possibility that that</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[nits]: extra "that".</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Removed.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">943<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; o&nbsp; Local Route =
Information Base (LOC-RIB) - This routing table</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">944<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
contains reachability information (i.e., next hops) for all</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">945<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
prefixes (both IPv4 and IPv6) as well as BGP-LS-SPF node</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">946<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
reachability.&nbsp; Implementations may choose to implement this =
with</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">947<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
separate RIBs for each address family and/or Prefix versus =
Node</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">948<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
reachability.&nbsp; It is synonymous with the Loc-RIB specified =
in</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">949<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
[RFC4271].</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[nits]: s/Loc-RIB/LOC-RIB</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">In this case, RFC 4271 uses =
=E2=80=9CLoc-RIB=E2=80=9D.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1017<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; =
*&nbsp; If the Current-Prefix's corresponding prefix is in the =
LOC-RIB</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div=
 style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1018<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; and the cost is less than the current route's metric, =
the</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[major]: I think this meant to be "more =
than the current route's metric"</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Clarified this so that there is =
no ambiguity as to which metric is referenced.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1134<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; operate today (i.e., =
"Ships-in-the-Night" mode).&nbsp; There is no</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1135<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; implicit route =
redistribution between the BGP address families.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[major]: what about redistribution from =
other protocols, say OSPF? &nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">This has typically been out of =
scope in routing protocol documents =E2=80=93 although I just saw a new =
draft dealing with BGP redistribution. In any case, I think this topic =
would warrant further discussion in a different draft.<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1167<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; prior to =
withdrawal.&nbsp; If the link becomes available in that =
period,</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div=
 style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1168<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; the originator of =
the BGP-LS-SPF LINK NLRI SHOULD advertise a more</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1169<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; recent version of =
the BGP-LS-SPF Link NLRI without the SPF Status TLV</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1170<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; in the BGP-LS Link =
Attributes.&nbsp;</span><o:p class=3D""></o:p></div></div></div><div =
class=3D""><div style=3D"margin-left: 0.5in;" class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[major]: "without SPF Status TLV", this is =
related with the second =E2=80=9CMajor issues=E2=80=9D above.</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Since all the SPF Status =
conditions indicate unreachability or a degraded state, this is correct. =
&nbsp;</span><o:p class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1263<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; A BGP-LS-SPF Speaker =
MUST perform the following syntactic validation</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1264<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; of the BGP-LS-SPF =
NLRI to determine if it is malformed.</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[minor]: there are a few places in the =
draft using "BGP-LS-SPF Speaker|speaker", may change to "BGP SPF =
speaker"?</span><o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">Yup =E2=80=93 fixed all these.</span><o:p =
class=3D""></o:p></div></div><div style=3D"margin-left: 0.5in;" =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;PT =
Mono&quot;; color: rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1425<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; Within a BGP SPF =
Routing Domain, the IGP metrics for all advertised</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">1426<span =
class=3D"apple-converted-space">&nbsp;</span>&nbsp; links SHOULD be =
configured or defaulted consistently.&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">[major]: in section 5.2.2, it says "One =
possible default for metric</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;&nbsp; would be to give each =
interface a cost of 1 making it effectively a</span><o:p =
class=3D""></o:p></div></div></div><div class=3D""><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;PT Mono&quot;; color: =
rgb(26, 26, 26);" class=3D"">&nbsp;&nbsp; hop count.". Why not define a =
default value so all implementations will be consistent?</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">We discussed and don=E2=80=99t =
want to add a default as different deployments could have totally =
different requirements. Also, other IGPs don=E2=80=99t have default =
metrics (at least, the link-state ones).<span =
class=3D"apple-converted-space">&nbsp;</span></span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0in 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: rgb(255, 253, 242);" class=3D""><span style=3D"" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0in 0.5in; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: rgb(255, 253, 242);" =
class=3D""><span style=3D"" class=3D"">Thanks,<br =
class=3D"">Acee</span></div></div></div></div></blockquote></div></div></d=
iv></div></blockquote></div><br class=3D""></div></body></html>=

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Yingzhen Qu <yingzhen.ietf@gmail.com>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "Yemin (Amy)" <amy.yemin@huawei.com>, "guntervandeveldecc@icloud.com" <guntervandeveldecc@icloud.com>, "lsvr@ietf.org" <lsvr@ietf.org>, "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-spf@ietf.org>, =?utf-8?B?THVjIEFuZHLDqSBCdXJkZXQ=?= <laburdet.ietf@gmail.com>
Thread-Topic: [RTG-DIR] Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
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Date: Thu, 1 Jul 2021 00:42:47 +0000
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Subject: Re: [RTG-DIR] Rtgdir Last Call review of draft-ietf-lsvr-bgp-spf-13
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