Re: [addr-select-dt] slide to 6man presentation

Tim Chown <tjc@ecs.soton.ac.uk> Mon, 26 July 2010 15:36 UTC

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From: Tim Chown <tjc@ecs.soton.ac.uk>
Date: Mon, 26 Jul 2010 16:35:52 +0100
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Subject: Re: [addr-select-dt] slide to 6man presentation
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On 26 Jul 2010, at 13:56, Arifumi Matsumoto wrote:

> 
> On 2010/07/26, at 21:35, Tony Hain wrote:
> 
>> I can present it, and don't have any further comments other than a TBD
>> reference for pulling the 'try addr sel again' ICMP from
>> draft-hain-ipv6-fwrh-03.txt
> 
> I don't object to add a reference to that.
> But, as the design team, we have not examined what that approach can solve and cannot.
> 
> And, personally I have a working group item titled draft-ietf-6man-addr-select-sol that covers possible approaches to the address selection problems. One of which approach is very similar to ICMP error based approach.

I think that draft is good in covering general solution spaces, but it does not discuss specifics.   

So Tony has his ICMP draft that is more specific from 3.3 of your draft, and we've implemented an ICMP-based router query message that is a more specific implementation of what's described *very* loosely in 3.2 of your solution space draft.

That said, I think policy distribution is the best way forward, but there may be cases where the other approaches are viable, e.g. if there is no policy distribution (DHCP) server - then the method Tony suggests or the routing hints may offer functionality that's otherwise missing?    But perhaps it's best to discuss these under the Troan draft umbrella and leave the primary DT output to be the policy distribution method?

Tim