Comcast enables 6to4 relays

Jeroen Massar jeroen at
Tue Aug 31 06:46:52 UTC 2010

On 2010-08-31 08:22, Mitchell Warden wrote:
> Is there a reason not to advertise more specific prefixes from 2002::/16 to ensure that traffic for your v4 routes comes back to your own 6to4 router?
> If for example all my users have v4 addresses in, I could advertise 2002:C002:0000::/40 instead of or in addition to the full 2002::/16.

The RFC forbids that with a good reason, as then we'll end up importing
the IPv4 BGP table into IPv6... not something we want to see (unless one
loves to import 300k routes in there, I guess people will really start
whining about that though ;).


More information about the NANOG mailing list