Currently I've been working to set up an IPv6 LAN network with ubuntu hosts and routers. but whenever i tried to ping from router to host or the other way around, its not working. i guess there are few steps that i missed out but still couldn't find it out my self.

Here's my current configuration:
iface eth0 inet6 static
address 2001:ac10:101::2
netmask 64
gateway 2001:ac10:101::1

and the configuration in cisco router:
router(config-if)#enable ipv6
router(config-if)#ipv6 address 2001:ac10:101::1/64

We have IPv6 on and its interrupting with my xbox