Re: WPD-6, WAA-8, and WAA-9 of draft-ietf-v6ops-ipv6-cpe-router-04

[Philip Homburg <pch-v6ops@u-1.phicoh.com>]

In your letter dated Tue, 6 Apr 2010 10:24:44 +0200 you wrote:
>> I prefer to avoid unnumbered links. I think it is much less confusing =
>if=20
>> source addresses of error ICMPs are always addresses from the =
>interface that
>> generated the error.
>
>these two paragraphs are mutually exclusive. you cannot require that an 
>ICMP error is sourced from the interface that generated the error and at 
>the same time require that a router use the strong host model.

Why? 

In the strong host model, every interface has a global address and some way 
of forwarding packets to a default router. 

So the interface that generates the ICMP uses it's own address as the source
of the ICMP and forwards it to a default router, which is typically the system
itself because we are talking about a router, but it could be an default
router.