Blackholing delegated prefix (Was: Using an *external* DHCPv6 server for prefix-delegation in conjunction with PPPoE)

[Zuleger, Holger, VF-DE]

> > does anyone know how I can setup a null route for the 
> delegated prefix?
> 
> in my experience, IOS does this automatically;
> 
> gw#sh ipv6 dhcp int | i Prefix:
>         Prefix: 2001:7B8:<XXXX>::/48
> 
> gw#sh ipv6 route 2001:7B8:<XXXX>::/48
> Routing entry for 2001:7B8:<XXXX>::/48
>   Known via "static", distance 1, metric 0
>   Route count is 1/1, share count 0
>   Routing paths:
>     directly connected via Null0
>       Last updated 2w0d ago
Ahh, great.

I tried it first with a manual configured general-prefix command
(w/o DHCPv6 running) and so I was looking for the static route syntax.

Thanks,
 Holger