v6 peering at PAIX/Palo Alto

[Nick Hilliard]

On Tue, 2006-08-29 at 10:58 -0400, Joe Abley wrote:
>  S&D  
> themselves insist that the correct prefix length is a /48.

What a peculiar thing to do.  Are they normally in the habit of taking
the POLA out the back of the facility and beating 20 shades of snot out
of it?

> What operational damage might result from a mixture of routers  
> configured with their PAIX address variously in a /48 or a /64? Will  
> it make any practical difference to anything?

It could, if you have proxy nd enabled somewhere.  Some people tried
this at LINX ca. 1998 with ipv4, and ended up proxy arping all traffic
from the 226 network to the 224 network.  It was not a pretty sight.

Otherwise, if S&D ever decide that this is a bad idea, they are going to
have great fun getting everyone to change back to /64, and those that
don't will have great fun with reachability.

Nick