Re: [bess] Shepherd's review of draft-ietf-bess-mvpn-expl-track

Eric C Rosen <erosen@juniper.net> Wed, 07 February 2018 16:57 UTC

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From: Eric C Rosen <erosen@juniper.net>
To: stephane.litkowski@orange.com, "draft-ietf-bess-mvpn-expl-track.authors@ietf.org" <draft-ietf-bess-mvpn-expl-track.authors@ietf.org>
Cc: "bess@ietf.org" <bess@ietf.org>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/qfOqafjX532lVigasPNGeKA7arY>
Subject: Re: [bess] Shepherd's review of draft-ietf-bess-mvpn-expl-track
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On 1/16/2018 11:29 AM, Eric C Rosen wrote:
>> “If the LIR-pF flag is set in a given PTA, the LIR flag of that PTA
>>    SHOULD also be set.”
>> [SLI] Why not using a MUST ?
>
> [Eric] If all the PEs support the LIR-pF flag, the procedures will 
> work as intended even if the LIR flag is not set.  So I don't think a 
> MUST is appropriate.

Thinking about this more, I now think you are right that MUST would be 
better.  By saying MUST, we remove an unnecessary variation in behavior.