Using an *external* DHCPv6 server for prefix-delegation in conjunction with PPPoE

[Per Carlson]

Hi Bjørn.

> > It's even better: You can directly assign a PD address on the WAN
interface:
>
> Really? rfc3633 says
>
>   Upon the receipt of a valid Reply message, for each IA_PD the
>   requesting router assigns a subnet from each of the delegated
>   prefixes to each of the links to which the associated interfaces are
>   attached, with the following exception: 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 don't know the reasoning behind the MUST NOT, but it is configurable and
seams to work fine. Clearly Cisco do violate the RFC here, but without any
apparent harm.

-- 
Pelle
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