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

[Per Carlson]

Hi Mikael.

> If you create a loopback interface with an PD address and use that as
> unnumbered addresson the WAN interface, does that work?

Yes, at least on a 1841 running 15.1(3)T [0].

> That's what I advocated for the CPE router draft anyway, I sure hope it
> works to do what you want to do (make the customer only have IPs from the PD
> space).

I don't really see how this would improve anything. What's the point
on assigning an IPv6 address on the WAN interface the BNG (PE) doesn't
know about? And informing it by running SLAAC "backwards" (CPE assigns
addresses to BNG) seams rather wierd... Risking the CPE sending a
default route towards the BNG is even worse!

[0] Tried this first with 12.4(23), but that one is broken. DHCPv6
Solicits are sourced with the loopback LL address, but it never
listened on that address on the physical interface.

-- 
Pelle

RFC1925, truth 11:
 Every old idea will be proposed again with a different name and
 a different presentation, regardless of whether it works.