EIGRP and IPv6

• Uses protocol 88
• Uses both Multicast and Unicast
  • Multicast FF02::A
  • Unicast to link-local
  • Multicast can be disabled
    • neighbor to link-local address

Configuration Classic Mode:

• Enabling IPv6
  • ‘ipv6 unicast routing’
  • Valid router ID must exist.
    • Uses IPv4 format
    • If there are no IPv4 interfaces then the ID needs to be specifically stated.
      • ‘eigrp router-id’
• Enabling EIGRP with ipv6
  • ‘ipv6 router eigrp <AS>’
  • enable global process
    • ‘no shut’ under eigrp process.
• Enable EIGRP on link level
  • ‘ipv6 eigrp <AS>
• If ipv6 is not enabled on the interface, that also needs to be turned on.
  • ‘ipv6 enable’
  • The adjacency will form with link-local addressing between two nodes.

Configuration Named Mode:

• Enabling IPv6
  • ‘ipv6 unicast routing’
  • ‘router eigrp <name>’
  • Enable Address Family
    • ‘address-family ipv6 unicast autonomous-system <AS>
    • Does not need to match IPv4 AS
    • Process starts automatically on each interface.
      • To disable EIGRP on an interface, must be shutdown under af-interface.

Named mode is preferred – syntax is unified between both address families.