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Re: [pim] draft-ietf-pim-igmp-mld-extension WGLC

"Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net> Wed, 16 December 2020 02:21 UTC

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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: Michael McBride <michael.mcbride@futurewei.com>, "pim@ietf.org" <pim@ietf.org>
Thread-Topic: draft-ietf-pim-igmp-mld-extension WGLC
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Date: Wed, 16 Dec 2020 02:21:18 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/pim/nTtxHYXGthw4136nrLkL8nLVX-E>
Subject: Re: [pim] draft-ietf-pim-igmp-mld-extension WGLC
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Support progressing this work.

I have a couple of curiosity questions on the following:

   Note that there may be additional data following this extension.  The
   Total Extension Length field would indicate where this extension
   ends, and the additional data starts.

How would you have additional data following this extension? The TLV mechanism seems to be universal/generic to handle all possible extensions, so why would you have another extension blob after this, and how would you indicate so? By another bit in the reserved field?
Just wondering if this additional data needs to be mentioned at all.

  Also, there is a possibility
   that an implementation uses the Additional Data part of IGMP/MLD
   messages, but not according to this extension scheme.

Do you mean a non-standard existing implementation? Now that you mention that, are we supposed to define the interop procedures? Are they supposed to interop with the implementations following this draft at all?

Also, for the following:


   The extension will be part of additional data as mentioned in

   [RFC3810] Section 5.1.12<https://tools.ietf.org/html/rfc3810#section-5.1.12> (resp.  [RFC3376] Section 4.1.10<https://tools.ietf.org/html/rfc3376#section-4.1.10>) for query

   messages and [RFC3810] Section 5.2.12<https://tools.ietf.org/html/rfc3810#section-5.2.12> (resp.  [RFC3376]<https://tools.ietf.org/html/rfc3376#section-4.2.11>

   Section 4.2.11<https://tools.ietf.org/html/rfc3376#section-4.2.11>) for report messages.

5.2.12 should be 5.2.11.

Jeffrey

From: pim <pim-bounces@ietf.org> On Behalf Of Michael McBride
Sent: Monday, December 7, 2020 7:24 PM
To: pim@ietf.org
Subject: [pim] draft-ietf-pim-igmp-mld-extension WGLC

[External Email. Be cautious of content]

Hello all,

Today begins a two week wglc for https://tools.ietf.org/html/draft-ietf-pim-igmp-mld-extension-02<https://urldefense.com/v3/__https:/tools.ietf.org/html/draft-ietf-pim-igmp-mld-extension-02__;!!NEt6yMaO-gk!U4mK606KM0ZrTIM1QF0yL3WB9NyFG1GlMc4OewxOWjcDUuzrpumqho-EBxMMejks$>

Please review (it's a quick read) and let us know your opinion on it's readiness to progress to the iesg.

Thanks,
mike


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