Re: [Idr] Adoption call for draft-ketant-idr-rfc7752bis-01.txt [8/8 to 8/22]

"Dongjie (Jimmy)" <> Fri, 09 August 2019 02:43 UTC

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From: "Dongjie (Jimmy)" <>
To: Susan Hares <>, 'idr wg' <>
Thread-Topic: [Idr] Adoption call for draft-ketant-idr-rfc7752bis-01.txt [8/8 to 8/22]
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Date: Fri, 09 Aug 2019 02:43:35 +0000
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Subject: Re: [Idr] Adoption call for draft-ketant-idr-rfc7752bis-01.txt [8/8 to 8/22]
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In general I support the adoption of this document. It helps to clarify some confusions in RFC7752, and to solve some issues we realized during the progress of subsequent BGP-LS extensions.

And here are the comments I raised on the mic during IDR session in Montreal:

In section 4.2.2 of this -bis document, there are some changes to the encoding rules of link local/remote identifiers in the Link descriptors.

"    If interface and neighbor addresses, either IPv4 or IPv6, are
      present, then the IP address TLVs MUST be included and the Link
      Local/Remote Identifiers TLV MUST NOT be included in the Link
      Descriptor.  The Link Local/Remote Identifiers TLV MAY be included
      in the link attribute when available.

      If interface and neighbor addresses are not present and the link
      local/remote identifiers are present, then the Link Local/Remote
      Identifiers TLV MUST be included in the Link Descriptor."

While in draft-ietf-idr-bgpls-segment-routing-epe-19, section 4.2, it says:

" o  Link Descriptors MUST include the following TLV, as defined in

      *  Link Local/Remote Identifiers (TLV 258) contains the 4-octet
         Link Local Identifier followed by the 4-octet Link Remote
         Identifier.  The value 0 is used by default when the link
         remote identifier is unknown.

   o  Additional Link Descriptors TLVs, as defined in [RFC7752], MAY
      also be included to describe the addresses corresponding to the
      link between the BGP routers:

      *  IPv4 Interface Address (Sub-TLV 259) contains the address of
         the local interface through which the BGP session is

Thus it seems the above text in -7752bis is somewhat inconsistent with the bgp-ls-epe draft. Could this be considered in next revision of the bis draft, or the bgp-ls-epe draft? Thanks.

Best regards,

From: Idr [] On Behalf Of Susan Hares
Sent: Friday, August 09, 2019 3:31 AM
To: 'idr wg' <>
Subject: [Idr] Adoption call for draft-ketant-idr-rfc7752bis-01.txt [8/8 to 8/22]

This begins a 2 week adoption call for draft-ketant-idr-rfc7752bis-01.txt [8/8 to 8/22/2019]

In your comments please indicate "support" or "no support".

The chair and AD feel that a revision to RFC7752 is needed
to specify additional error handling.  Please consider
if this draft is a good place to start for this revision.

Cheerily, Susan Hares