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Re: [Anima] Fwd: I-D Action: draft-carpenter-anima-l2acp-scenarios-00.txt

Brian E Carpenter <brian.e.carpenter@gmail.com> Thu, 28 February 2019 01:40 UTC

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To: Michael Richardson <mcr+ietf@sandelman.ca>
Cc: Anima WG <anima@ietf.org>
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Thu, 28 Feb 2019 14:40:14 +1300
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Subject: Re: [Anima] Fwd: I-D Action: draft-carpenter-anima-l2acp-scenarios-00.txt
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On 28-Feb-19 14:22, Michael Richardson wrote:
> 
> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>     > Here is a new draft for ANIMA to consider. We believe it is useful
>     > to explore the idea of an autonomic control plane constructed at
>     > the link layer. Comments please!
> 
> Does this mean it transports L2 packets (a la spanning-tree or TRILL), or
> does this mean it uses L2 technologies like MACSEC to create a tunnel
> for L3 packets?

Well, I don't think the draft in its present form should attempt to
answer that question. In my mind I was thinking of a conventional
LAN set up, i.e. spanning tree, but that doesn't have to be the
only way. In practice that usually needs MLDv2 snooping as well.
 
> i.e. does L3 multicast appear to just work because it more layer-2 tricks?

L3 multicast works automatically if L2 multicast works, surely (remembering
that there is no router). How L2 multicast works is another question, of
course. I don't mean to say it's unimportant, just that it's not in scope
for this particular draft.

    Brian

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