Re: FW: 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 Mon, 5 Apr 2010 08:51:40 -0500 you wrote:
>>So, what is wrong with that scenario?
>
>Section 12.1 of RFC 3633 forbids it:
>
>"the requesting router MUST NOT assign any delegated prefixes or subnets
>from the delegated prefix(es) to the link through which it received the
>DHCP message from the delegating router."

I know, but why?

I always see a MUST NOT as something that would cause major harm or
interoperability problems. But the DHCP PD RFC just says 'MUST NOT' without
giving any reason what so ever.

So maybe it is time to revisit that requirement instead of using that to 
force the weak host model onto CPEs.