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

[Daniel Verlouw]

On Wed, 2011-01-19 at 16:42 +0100, Zuleger, Holger, VF-DE wrote:
> 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

(no static route configured)

   --Daniel.