[Anima-signaling] Remove SONN constrained instance?

Brian E Carpenter <brian.e.carpenter@gmail.com> Wed, 07 December 2016 03:57 UTC

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To: Michael Richardson <mcr+ietf@sandelman.ca>, Anima signaling DT <anima-signaling@ietf.org>
References: <d394fc61-edb7-eb3c-85fb-cd7c10fb2927@gmail.com> <2658.1480552478@obiwan.sandelman.ca> <d76de5d2-cf9f-09ef-653f-098d4c0a3ca0@gmail.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Wed, 7 Dec 2016 16:57:53 +1300
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Subject: [Anima-signaling] Remove SONN constrained instance?
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OK, I've been working on the other issues that I'm aware of
(including adding the dry-run flag - easy - and changing Flood
to associate a locator with each objective - very easy in the draft,
quite a lot of work in the prototype). So unless Michael's re-review
comes up with more, SONN is now the only open issue.

I looked at the text again just now and it's a fairly simple question:
If ACP formation can just use Flood as an announcment for ACP neighbors
to find each other and start IKEv2, I agree that we don't need SONN.

I'm also not at all clear how SONN would work. The text says it
will use TLS but I'm unclear where the certs would come from.

But you ACP folks have to chime in. Please. I'd really like us to
put a new version out to the WG very soon, otherwise we get into the
holidays.

Regards
   Brian



On 01/12/2016 15:33, Brian E Carpenter wrote:
> On 01/12/2016 13:34, Michael Richardson wrote:
>>
>> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>>     > 61.  Is the SONN constrained instance really needed?
>>
>>     > My personal inclination is to say "yes" to #59, #61 and #62.
> 
> (BTW, I meant #60 there.)
> 
>>
>>     > We really need Michael R & Toerless to reach an agreement about #61.
>>
>> I think that I said we didn't need it.
> 
> You did. But Toerless proposed it, so we need his opinion.
> 
>> That all we need is to become aware of the neighbours (which insecure DULL
>> can do with M_FLOOD), and that all the security is best done by IKEv2.
>> (And IKEv2, even if MacSEC is negotiated rather than IPsec)
>>
>> The ACP-04 document imagines a protocol that isn't IKEv2 using some
>> unspecified encapsulation over (d)TLS transporting IP packets, and negotiated
>> using GRASP.  This hardly has any existing specification (one in tsvwg right
>> now), and has no hardware support anywhere.  It's not our place in this WG
>> to create new security protocols.
> 
> Yes, all I would expect to see negotiated over GRASP would be *which* security
> mechanism to use; that's what is assumed in
> https://tools.ietf.org/html/draft-carpenter-anima-ani-objectives-00#section-3.2
> 
> I have no skin in the game though; I'm quite happy with
> https://tools.ietf.org/html/draft-carpenter-anima-ani-objectives-00#section-3.1
> 
> Toerless?
> 
> Rgds
>    Brian
>