EIGRP
EIGRP has been expanded to support IPv6, although you’ll need to verify that
a specific version of IOS is capable of doing this. EIGRP for IPv6 is based
on the IPv4 version. EIGRP is still an advanced distance vector routing protocol
that uses a complex metric. EIGRP still has a reliable update mechanism and
uses DUAL to retain fall-back paths. Like EIGRP in IPv4, it sends multicast
hellos every five seconds (but the multicast address is now FF02::A). EIGRP
is enabled as described in the following:
Router(config)#ipv6 router eigrp as
Router(config-rtr)#router-id ipv4-address|ipv6-address
Router(config-rtr)#interface type number
Router(config-if)#ipv6 eigrp as
Like EIGRP for IPv4, troubleshoot by looking at the routing table (show
ipv6 route), by reviewing the routing protocols (show ipv6 protocols), and
by monitoring neighbors (show ipv6 eigrp neighbors). Example 8-4 shows
the configuration for IPv6 EIGRP. Notice that the routing protocol must be
enabled under each interface.