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 16:55:22 +0200 you wrote:
>isn't that obvious?

No it isn't.

>if you generate an ICMP message from e.g Ethernet0 destined to a 
>destination on Serial0?
>since the error happened on Ethernet0, that's the address you want to 
>use as a source for the ICMP. you cannot do this with the strong host 
>model.

Suppose we have a packet with source S, and destination D. At Ethernet0 with
address I we discover that we cannot forward the packet anymore. So we
generate an ICMP with source I and destination S and use Ethernet0's default
router (probably internal to the node because we a talking about a router) to
send the packet on its way to S.

Whether destination D is at Serial0 or not is irrelant.