ipv6 unicast-routing
ipv6 cef


!
interface Tunnel8
 description Comcast 6to4
 no ip address
 no ip redirects
 ipv6 address 2002:XXXX:YYYY::1/128
 ipv6 enable
 ipv6 traffic-filter IPV6-OUTSIDE in
 tunnel source Fa0/0
 tunnel mode ipv6ip 6to4
end

ipv6 route 2002::/16 Tunnel8
ipv6 route ::/0 2002:C058:6301::


ipv6 access-list IPV6-OUTSIDE
 permit icmp any any