As with RIPng, EIGRPv6 works much the same as its IPv4 predecessor does—most of the features that EIGRP provided before EIGRPv6 will still be available.
EIGRPv6 is still an advanced distance-vector protocol that has some link-state features. The neighbor discovery process using hellos still happens, and it still provides reliable communication with reliable transport protocol that gives us loop-free fast convergence using the Diffusing Update Algorithm (DUAL).
Hello packets and updates are sent using multicast transmission, and as with RIPng, EIGRPv6’s multicast address stayed almost the same. In IPv4 it was 224.0.0.10; in IPv6, it’s FF02::A (A = 10 in hexadecimal notation).
But obviously, there are differences between the two versions. Most notably, and just as with RIPng, the use of the network command is gone, and the network and interface to be advertised must be enabled from interface configuration mode. But you still have to use the router configuration mode to enable the routing protocol in EIGRPv6 because the routing process must be literally turned on like an interface with the no shutdown command—interesting!
The configuration for EIGRPv6 is going to look like this:
Router1(config)#ipv6 router eigrp 10
The 10 in this case is still the autonomous system (AS) number. The prompt changes to (config-rtr), and from here you must perform a no shutdown:
Router1(config-rtr)#no shutdown
Other options also can be configured in this mode, like redistribution.
So now, let’s go to the interface and enable IPv6:
Router1(config-if)#ipv6 eigrp 10
The 10 in the interface command again references the AS number that was enabled in the configuration mode.
Last to check out in our group is what OSPF looks like in the IPv6 routing protocol.
EIGRPv6 is still an advanced distance-vector protocol that has some link-state features. The neighbor discovery process using hellos still happens, and it still provides reliable communication with reliable transport protocol that gives us loop-free fast convergence using the Diffusing Update Algorithm (DUAL).
Hello packets and updates are sent using multicast transmission, and as with RIPng, EIGRPv6’s multicast address stayed almost the same. In IPv4 it was 224.0.0.10; in IPv6, it’s FF02::A (A = 10 in hexadecimal notation).
But obviously, there are differences between the two versions. Most notably, and just as with RIPng, the use of the network command is gone, and the network and interface to be advertised must be enabled from interface configuration mode. But you still have to use the router configuration mode to enable the routing protocol in EIGRPv6 because the routing process must be literally turned on like an interface with the no shutdown command—interesting!
The configuration for EIGRPv6 is going to look like this:
Router1(config)#ipv6 router eigrp 10
The 10 in this case is still the autonomous system (AS) number. The prompt changes to (config-rtr), and from here you must perform a no shutdown:
Router1(config-rtr)#no shutdown
Other options also can be configured in this mode, like redistribution.
So now, let’s go to the interface and enable IPv6:
Router1(config-if)#ipv6 eigrp 10
The 10 in the interface command again references the AS number that was enabled in the configuration mode.
Last to check out in our group is what OSPF looks like in the IPv6 routing protocol.
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