Re: Rtgdir last call review of draft-ietf-bess-mvpn-expl-track-09

Eric C Rosen <erosen@juniper.net> Thu, 13 September 2018 13:52 UTC

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Subject: Re: Rtgdir last call review of draft-ietf-bess-mvpn-expl-track-09
To: Carlos Pignataro <cpignata@cisco.com>, rtg-dir@ietf.org
Cc: draft-ietf-bess-mvpn-expl-track.all@ietf.org, ietf@ietf.org, bess@ietf.org
References: <153680921406.9518.6561870388073765884@ietfa.amsl.com>
From: Eric C Rosen <erosen@juniper.net>
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On 9/12/2018 11:26 PM, Carlos Pignataro wrote:
> I found the rational and specific details on what this document "Updates" from
> three previous RFCs to be lacking, and confusing.

Carlos,

Thanks for your review.

I don't want to get caught up in the neverending discussion of exactly 
what constitutes an "Update".  This is being discussed right now on the 
IETF list, and it's quite clear that there is no consensus.  As usual, 
every possible opinion is dogmatically held by someone ;-)

The introduction of the expl-track draft explicitly points out a number 
of situations that are not adequately addressed in the prior RFCs, and 
for which the prior RFCs do not provide clear guidance. This is a 
potential source of interoperability problems.

The introduction also indicates a number of new features that are added 
by the draft.

Anyone implementing RFCs 6514, 6625, and/or 7524 will certainly be 
well-advised to read this draft in order to (a) make sure that they 
properly handle the situations that are not explicitly addressed by the 
prior RFCs, and (b) to make sure that they are aware of the new features 
so they can make an informed decision of whether to implement them.

I think this justifies the "Updates" status.

> I recommend an "Updates from RFC XYZ" section in which there is a textual
> explanation and ideally Old/New specifics on how this document updates previous
> RFCs.

I think the introduction covers this in the appropriate level of detail; 
I really don't know what could be added.

Eric