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Re: [v6ops] question about draft-jjmb-v6ops-unique-ipv6-prefix-per-host

Brian E Carpenter <brian.e.carpenter@gmail.com> Mon, 03 July 2017 23:31 UTC

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To: Ted Lemon <mellon@fugue.com>, Ole Troan <otroan@employees.org>
Cc: v6ops@ietf.org
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Tue, 04 Jul 2017 11:31:14 +1200
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Subject: Re: [v6ops] question about draft-jjmb-v6ops-unique-ipv6-prefix-per-host
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On 04/07/2017 09:49, Ted Lemon wrote:
> On Jul 3, 2017, at 5:41 PM, Ole Troan <otroan@employees.org> wrote:
>> It breaks the assumption that everything you want discovered is within the same broadcast domain. Many think that assumption was broken anyway. 
> 
> Given the document I'm presently working on, I wouldn't really argue with that, except to say that it's still the default assumption in most environments.

Yes, and that has deeply impacted both a document I'm working on
(draft-ietf-anima-grasp) and a demo implementation thereof
(https://github.com/becarpenter/graspy/blob/master/grasp.py).

The cost of *not* having link-local multicast is considerable,
because it means that every node, however dumb, must replicate
and relay discovery in one way or another.

    Brian

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