Re: [Idr] AD Review of draft-ietf-idr-tunnel-encaps-15

John Scudder <jgs@juniper.net> Fri, 01 May 2020 21:07 UTC

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From: John Scudder <jgs@juniper.net>
To: Alvaro Retana <aretana.ietf@gmail.com>
CC: "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf. org" <idr@ietf.org>
Thread-Topic: AD Review of draft-ietf-idr-tunnel-encaps-15
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Date: Fri, 1 May 2020 21:06:56 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/tR8F3cE7Slf2dLxiD3IBXKrXY-k>
Subject: Re: [Idr] AD Review of draft-ietf-idr-tunnel-encaps-15
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Hi Alvaro,

On Feb 21, 2020, at 7:47 AM, Alvaro Retana <aretana.ietf@gmail.com<mailto:aretana.ietf@gmail.com>> wrote:

[major] rfc5512 said that "Unknown types are to be ignored and skipped
upon receipt."  Is that still the case?

Yes. As I read it, this is covered in greater detail by section 11:

   If a Tunnel Encapsulation attribute can be parsed correctly, but
   contains a TLV whose tunnel type is not recognized by a particular
   BGP speaker, that BGP speaker MUST NOT consider the attribute to be
   malformed.  Rather, the TLV with the unrecognized tunnel type MUST be
   ignored, and the BGP speaker MUST interpret the attribute as if that
   TLV had not been present.

—John