6to4 sample config?

[Mikael Abrahamsson]

On Mon, 18 Apr 2011, Garry Glendown wrote:

> even though we have v6 on and active on our network, with v6-addresses 
> handed out to DSL dial-ins that ask for it, I was looking into setting 
> up a 6to4 gateway for the customers that don't use v6-capable CPEs ... 
> is there any sample config available for Cisco gear? I have a 2800 
> router humming away in one of our racks that could be used exclusively 
> for this ...

Please first make sure you don't have a nice performing 6to4 relay close 
to you, that might actually give your customers a better experience than 
if you run your own on your fairly lowly 2800.

We're running it on our 7600 (which does this in wirespeed) with the 
following config:

interface Tunnel2002
  description 6to4
  no ip address
  no ip redirects
  load-interval 30
  ipv6 address 2002:82F4:1F::1/128
  tunnel source Loopback2002
  tunnel mode ipv6ip 6to4

interface Loopback2002
  description 6to4
  ip address 192.88.99.1 255.255.255.0

You have to change the ipv6 address to match the IPv4 address of your 
relay.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se