IPv6 ping not working when pinging other LAN

[Student690]

I configured the simple network below to test the connectivity of the ipv6 in the devices. The configurations are as shown and ipv6 unicast-routing is enabled. When pinging from Router 5 to Router 6 G0/1, it succeeds but when pinging from Router 5 to Router 6 G0/0, it fails. Same thing occurs when pinging Router 7 G0/0 from Router 5. Do anyone know what might be the cause of this? Your help is greatly appreciated 

[Student690]

[Harold Ritter]

Hi @Student690 ,

Pinging from R5 to R6 gi0/1 doesn't require any route on R5, as it is directly connected. Pinging from R5 to R6 gi0/0 does require a route though, as it is not directly connected.

Try adding the following default routes.

R5:

ipv6 route ::/0 <R6 gi0/1 ipv6 address>

R7:

ipv6 route ::/0 <R6 gi0/0 ipv6 address>

You should then be able to ping from R5 to R7 and vice versa.

Regards,