RE: [Isis-wg] Further short CCAMP WG Last Call ondraft-ietf-ccamp-te-node-cap-03.txt
"LE ROUX Jean-Louis RD-CORE-LAN" <jeanlouis.leroux@orange-ftgroup.com> Mon, 18 December 2006 17:52 UTC
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Subject: RE: [Isis-wg] Further short CCAMP WG Last Call ondraft-ietf-ccamp-te-node-cap-03.txt
Date: Mon, 18 Dec 2006 18:39:42 +0100
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Thread-Topic: [Isis-wg] Further short CCAMP WG Last Call ondraft-ietf-ccamp-te-node-cap-03.txt
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From: LE ROUX Jean-Louis RD-CORE-LAN <jeanlouis.leroux@orange-ftgroup.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, adrian@olddog.co.uk, ccamp@ops.ietf.org
Cc: ospf@ietf.org, isis-wg@ietf.org
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Hi Lee We've just submitted v04 that accounts for your comments. Thanks, JL > -----Message d'origine----- > De : Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com] > Envoyé : vendredi 15 décembre 2006 19:23 > À : zzx-adrian@olddog.co.uk; LE ROUX Jean-Louis RD-CORE-LAN; > ccamp@ops.ietf.org > Cc : ospf@ietf.org; isis-wg@ietf.org > Objet : RE: [Isis-wg] Further short CCAMP WG Last Call > ondraft-ietf-ccamp-te-node-cap-03.txt > > 1)The use of TLV and sub-TLV is not consistent throughout the > document regarding IS-IS. For example, in the second and > third paragraphs of Section 4.2: > > The IS-IS TE Node Capability Descriptor TLV is carried > within an IS- > IS CAPABILITY TLV which is defined in [OSPF-CAP]. > > The format of the IS-IS TE Node Capability sub-TLV is the > same as the > TLV format used by the Traffic Engineering Extensions to IS-IS > [RFC3784]. That is, the TLV is composed of 1 octet for the type, 1 > octet specifying the TLV length and a value field. > > "TLV" should be "sub-TLV" in all cases except when referring > to the IS-IS CAPABILITY TLV. > Also [OSPF-CAP] should be [IS-IS-CAP] > > Similar changes needed in Section 5.2 and some other places. > > 2)In Section 5.2: > > The TE Node Capability Descriptor TLV is OPTIONAL and MUST > NOT appear > more than once in an ISIS Router Capability TLV. If a TE Node > Capability Descriptor TLV appears more than once in an ISIS > Capability TLV, only the first occurrence MUST be processed, other > occurrences MUST be ignored. > > I would prefer that the second sentence be omitted - for > reasons that have been discussed in the context of the PCE > draft - I have repeated the relevant comments here: > > <snip> > In cases where a TLV may move from one LSP fragment to > another (for example because of the addition of information > which exceeds the carrying capacity of the original LSP > fragment) a router may have multiple copies of the same TLV > as a transient condition. It is impossible to know which of > the copies is newer and therefore impossible to > deterministically decide which is the first instance of a > subTLV. So it is better to leave the behavior in this case as > undefined. > <end snip> > > Les > > > > -----Original Message----- > > From: Adrian Farrel [mailto:adrian@olddog.co.uk] > > Sent: Friday, December 15, 2006 3:33 AM > > To: LE ROUX Jean-Louis RD-CORE-LAN; ccamp@ops.ietf.org > > Cc: ospf@ietf.org; isis-wg@ietf.org > > Subject: [Isis-wg] Further short CCAMP WG Last Call > > ondraft-ietf-ccamp-te- node-cap-03.txt > > > > Hi, > > > > Sorry, I fumbled this. > > > > Jean-Louis made some significant changes after we completed the > > working group last call. He took on board the comments from CCAMP, > > ISIS and OSPF and made the changes that he describes below. > > > > Since one of these changes is relatively substantial (the > conflation > > of two bit-fields into one) I want to give everyone a chance to > > comment before we go forward to the ADs. > > > > So, there is a one week last call running on the CCAMP mailing list > > until noon GMT 22nd December 2006. > > > > Thanks, > > Adrian > > > > ----- Original Message ----- > > From: "LE ROUX Jean-Louis RD-CORE-LAN" <jeanlouis.leroux@orange- > > ftgroup.com> > > To: <ccamp@ops.ietf.org> > > Sent: Wednesday, November 22, 2006 7:25 AM > > Subject: RE: I-D ACTION:draft-ietf-ccamp-te-node-cap-03.txt > > > > > > Hi all, > > > > This new version accounts for comments received during the > CCAMP ISIS > > and OSPF WG last call. > > > > Here are the main changes: > > > > -The data plane and control plane cap sub-TLVs have been > removed. The > > capabilities are now carried directly with the TE Node Capability > > Descriptor TLV, and there is a single registry for both control and > > data plane capabilities. > > > > -In section 5: > > "other occurences MUST be discarded" replaced by "other occurrences > > MUST be ignored" > > > > -In section 6: > > "a router not supporting the TE Node Capability Descriptor TLV MUST > > just silently ignore the TLV" > > Replaced by: "a router not supporting the TE Node Capability > > Descriptor TLV will just silently ignore the TLV" > > > > Regards, > > > > JL > > > > > -----Message d'origine----- > > > De : owner-ccamp@ops.ietf.org > > > [mailto:owner-ccamp@ops.ietf.org] De la part de > > > Internet-Drafts@ietf.org Envoyé : mardi 21 novembre 2006 > 21:50 À : > > > i-d-announce@ietf.org Cc : ccamp@ops.ietf.org Objet : I-D > > > ACTION:draft-ietf-ccamp-te-node-cap-03.txt > > > > > > A New Internet-Draft is available from the on-line > Internet-Drafts > > > directories. > > > This draft is a work item of the Common Control and Measurement > > > Plane Working Group of the IETF. > > > > > > Title : IGP Routing Protocol Extensions for Discovery of Traffic > > > Engineering Node Capabilities > > > Author(s) : J. Vasseur, et al. > > > Filename : draft-ietf-ccamp-te-node-cap-03.txt > > > Pages : 13 > > > Date : 2006-11-21 > > > > > > It is highly desired in several cases, to take into > account Traffic > > > Engineering (TE) node capabilities during Multi Protocol Label > > > Switching (MPLS) and Generalized MPLS (GMPLS) Traffic > Engineered > > > Label Switched Path (TE-LSP) selection, such as for > instance the > > > capability to act as a branch Label Switching Router (LSR) of a > > > Point-To-MultiPoint (P2MP) LSP. This requires advertising these > > > capabilities within the Interior Gateway Protocol > (IGP). For that > > > purpose, this document specifies Open Shortest Path First > > > (OSPF) and > > > Intermediate System-Intermediate System (IS-IS) traffic > > > engineering > > > extensions for the advertisement of control plane and > data plane > > > traffic engineering node capabilities. > > > > > > A URL for this Internet-Draft is: > > > > http://www.ietf.org/internet-drafts/draft-ietf-ccamp-te-node-cap-03. > > > txt > > > > > > > > _______________________________________________ > > Isis-wg mailing list > > Isis-wg@ietf.org > > https://www1.ietf.org/mailman/listinfo/isis-wg >
- RE: [Isis-wg] Further short CCAMP WG Last Call on… LE ROUX Jean-Louis RD-CORE-LAN