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Re: [bess] Éric Vyncke's Discuss on draft-ietf-bess-evpn-igmp-mld-proxy-18: (with DISCUSS and COMMENT)

John E Drake <jdrake@juniper.net> Fri, 04 March 2022 14:00 UTC

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From: John E Drake <jdrake@juniper.net>
To: =?utf-8?B?w4lyaWMgVnluY2tl?= <evyncke@cisco.com>, The IESG <iesg@ietf.org>
CC: "draft-ietf-bess-evpn-igmp-mld-proxy@ietf.org" <draft-ietf-bess-evpn-igmp-mld-proxy@ietf.org>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "bess@ietf.org" <bess@ietf.org>, "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>
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Date: Fri, 4 Mar 2022 13:59:58 +0000
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Subject: Re: [bess] =?utf-8?q?=C3=89ric_Vyncke=27s_Discuss_on_draft-ietf-bess?= =?utf-8?q?-evpn-igmp-mld-proxy-18=3A_=28with_DISCUSS_and_COMMENT=29?=
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Hi,

Snipped, comments inline

Yours Irrespectively,

John


Juniper Business Use Only

> -----Original Message-----

> DISCUSS:
> ----------------------------------------------------------------------
> 
> As Martin Vigoureux's term is near its end, I took the liberty to re-evaluate the
> ballot status of this document and clearing parts of my original block DISCUSS
> points and many of my original non-blocking COMMENT points.
> 
> See below this line for updated version
> ----------------------------------------------
> 
> Thank you for the work put into this document. I have to state that I am neither
> a EVPN expert not a multicast one.
> 
> Please find below some blocking DISCUSS points (probably easy to address),
> some non-blocking COMMENT points (but replies would be appreciated even if
> only for my own education), and some nits.
> 
> Special thanks to Stéphane Litkowski for his shepherd's write-up about the WG
> consensus.
> 
> I hope that this helps to improve the document,
> 
> Regards,
> 
> -éric
> 
> == DISCUSS ==
> 
> The text covers in details how to map MLD/IGMP into BGP routes but does not
> say a word on how to recreate the MLD/IGMP packets. Should there be any such
> specification (e.g., in section 4.1) ?

[JD]  We added: 

9.1.2.  Reconstructing IGMP / MLD Membership Reports from Selective Multicast Route

9.2.2.  Reconstructing IGMP / MLD Membership Reports from Multicast Membership Report Sync Route

9.3.2.  Reconstructing IGMP / MLD Leave from Multicast Leave Sync Route

> 
> -- Section 1 --
> In the same vein, is it about IGMP only ? Or does it include MLD as well ? It is
> really unclear.

[JD]  The Abstract states:   This document describes how to support efficiently endpoints running IGMP
(Internet Group Management Protocol) or MLD (Multicast Listener  Discovery) for the multicast services
over an EVPN network by incorporating IGMP/MLD proxy procedures on EVPN (Ethernet VPN) PEs.

We also added this paragraph to section 3 at Ben's behest:

It is important to note when there is text considering whether a PE indicates support for IGMP proxying,
the corresponding behavior has a natural analogue for indication of support for MLD proxying, and the
analogous requirements apply as well.

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