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Re: [Softwires] [Gen-art] Genart telechat review of draft-ietf-softwire-mesh-multicast-23

Alissa Cooper <alissa@cooperw.in> Wed, 26 September 2018 23:28 UTC

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From: Alissa Cooper <alissa@cooperw.in>
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Date: Wed, 26 Sep 2018 16:28:43 -0700
Cc: gen-art@ietf.org, softwires@ietf.org, draft-ietf-softwire-mesh-multicast.all@ietf.org
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To: Brian Carpenter <brian.e.carpenter@gmail.com>
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Subject: Re: [Softwires] [Gen-art] Genart telechat review of draft-ietf-softwire-mesh-multicast-23
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Brian, thanks for your reviews of this document. WG, thanks for your responses. 

I entered a No Objection ballot. I think Ole’s response on your point below clarified this.

Alissa

> On Sep 21, 2018, at 8:19 PM, Brian Carpenter <brian.e.carpenter@gmail.com> wrote:
> 
> Reviewer: Brian Carpenter
> Review result: Ready with Issues
> 
> Gen-ART telechat review of draft-ietf-softwire-mesh-multicast-23
> 
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair. Please wait for direction from your
> document shepherd or AD before posting a new version of the draft.
> 
> For more information, please see the FAQ at
> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
> 
> Document: draft-ietf-softwire-mesh-multicast-23.txt
> Reviewer: Brian Carpenter
> Review Date: 2018-09-22
> IETF LC End Date: 2018-09-06
> IESG Telechat date: 2018-09-27 
> 
> Summary: Ready with issues
> --------
> 
> Comments: 
> ---------
> 
> Thank you for handling my Last Call comments. I am mentioning my previous
> issue again in case the IESG thinks any further change is needed.
> 
> Issue:
> ------
> 
> "7.3.  Fragmentation
> 
>   The encapsulation performed by an upstream AFBR will increase the
>   size of packets.  As a result, the outgoing I-IP link MTU may not
>   accommodate the larger packet size.  It is not always possible for
>   core operators to increase the MTU of every link, thus fragmentation
>   after encapsulation and reassembling of encapsulated packets MUST be
>   supported by AFBRs [RFC5565].  The specific requirements for
>   fragmentation and tunnel configuration COULD be referred to in
>   [I-D.ietf-intarea-tunnels], which is under revision currently."
> 
> This text is significantly improved. However, I still wonder, if I-IP is
> IPv6, how does the originator of the IPv6 packet (the AFBR) know that it
> needs to include a fragment header? In addition to the discussion in
> [I-D.ietf-intarea-tunnels], isn't it necessary to specify that PMTUD
> should be enabled and that ICMPv6 packets must not be filtered?
> 
> Nit:
> ----
> 
> Please change COULD to SHOULD in the above paragraph.
> 
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