All EIGRPv6 show commands are preceded by the keyword “ipv6.” All show commands are available this way, and all resemble the same commands used in EIGRP (IPv4) administration.
Notice that IPv6 does not require neighboring interfaces to be on a common subnet… this is because the hellos are sent using link-local addressing. This is the only fundamental difference between neighbor rules.
Here are the most useful show commands to run when troubleshooting EIGRPv6:
Stuck-in-Active: Journal of an IT-Network Administrator 