IPv6 on a Cisco 877w doesn’t work… well it does… providing you don’t want to use the wireless bit.

rtr1(config)#int dot11radio0
rtr1(config-if)#ipv6 ?
% Unrecognized command
rtr1(config-if)#

Despite what you might read on the interwebs, you can’t actually apply an IPv6 address to either the dot11radio interface or sub interfaces.

In my current config I use a single vlan for ethernet & wireless, IPv6 works perfectly on the LAN but not on the wireless side.

rtr1#p ipv6.google.com so vl1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:4860:0:2001::68, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 408/411/424 ms
rtr1#

On the LAN side hosts get an address and have full connectivity, however epic fail awaits if you try when connected to the wireless. According to what I’ve read Cisco TAC say “Integrated Routing and Bridging (IRB) does not support IPV6 at all.”

Bah, so now I’ll have to be tethered to the desk to use IPv6 or maybe I should get that Airport Extreme fired up and doing something useful instead of collecting dust 🙂