IPV6 – Network Setup Lab Tips

  • Always do IPV6 unicast-routing to enable IPV6 on router and switches.
  • Switches require sdm prefer dual-ipv4-and-ipv6 default to enable IPV6 (will require a reboot)
  • Always hard code the interface link-local address e.g. FE80::1 link-local as most routing protocols uses the link local address when forming adjacencies (ospf) and / or sourcing updates. Assign the same link-local address on all the IPV6 interfaces of that router as it will make life easier e.g. FE80::1 link-local on all IPV6 interfaces of R1, including tunnel interfaces
  • Exception to the above is when configuring eui-64 address, do not hard code the link-local as the dynamic address will not be created.
  • Make sure link local addresses are mapped in the Frame Relay statements as it will break OSPFV3 across frame-relay.
  • Frame-relay broadcast statement only need to be used once per DLCI, so no need to use it for both the link-local and global address map statements.
  • IPV6 does not use Arp, it uses Neighbour Discovery which relies on ICMP. If you see nothing under show iv6 neighbour then ping the destination router and you should see that show command populate. This is basically equivalent to a show ip arp
  • Site Local address starts with FEC0