If your routers have been configured to use eigrpv6. while troubleshooting a routing issue, you decide that you need to view the current state of the ipv6 routing protocol processes on each router. then show ipv6 eigrp neighbors
Routing in IPv6 is almost identical to IPv4 routing under CIDR. The only difference is the addresses are 128-bit IPv6 addresses instead of 32-bit IPv4 addresses. With very straightforward extensions, all of IPv4's routing algorithms, such as OSPF, RIP, IDRP, IS-IS, can be used to route IPv6.
IPv6 also includes simple routing extensions that support powerful new routing capabilities. The following list describes the new routing capabilities:
Provider selection that is based on policy, performance, cost, and so on
Host mobility, route to current location
Auto-readdressing, route to new address
You obtain the new routing capability by creating sequences of IPv6 addresses that use the IPv6 routing option. An IPv6 source uses the routing option to list one or more intermediate nodes, or topological group, to be visited on the way to a packet's destination. This function is very similar in function to IPv4's loose source and record route option.
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