Configure Router Advertisement Parameters

1. Enter Interface Configuration mode for the VLAN 1 interface.

   SEFOS# configure terminal
   SEFOS(config)# interface vlan 1

2. Enable IPv6 support, and assign a unicast address for the interface.

   SEFOS(config-if)# ipv6 enable
   SEFOS(config-if)# ipv6 address fec0::1111:0:1/96

3. Enable IPv6 RA in the interface.

   SEFOS(config-if)# no ipv6 nd suppress-ra

4. Configure RA-related parameters, such as RA flags, hop-limit, and lifetime.
5. Set the M-bit in the router advertisement to either stateful or stateless.
   1. To indicate that the host should configure an address using the stateful address configuration, use the following command:

      SEFOS(config-if)# ipv6 nd managed-config flag

   2. To indicate that the host should configure an address using the stateless address configuration, use the following command:

      SEFOS(config-if)# no ipv6 nd managed-config flag

6. Set the O-bit in the router advertisement to either stateful or stateless.
   1. To indicate that the host should configure nonaddress information by statelful means, use the following command

      SEFOS(config-if)# ipv6 nd other-config flag

   2. To indicate that the host should configure nonaddress information by stateless means, use the following command

      SEFOS(config-if)# no ipv6 nd other-config flag

7. Configure the hop-limit to be placed in the router advertisements sent from the IPv6 interface.

   SEFOS(config-if)# ipv6 hop-limit 10

8. Configure the default router time.

   The default router time is given in seconds. This value represents the time taken until the entity acts as the default router for all of the hosts on the interface.

   SEFOS(config-if)# ipv6 nd ra-lifetime 1000

9. Configure the reachable-time.

   The reachable-time is given in milliseconds. This value represents the time taken until a neighboring node is considered to be reachable after having received the reachability confirmation from that node.

   SEFOS(config-if)# ipv6 nd reachable-time msec 500000

10. Configure the retransmit time.

    The retransmit time is given in milliseconds. This value represents the time taken between retransmitted neighbor solicitations, and it is used during address resolution, reachability detection, and duplicate address detection.

    SEFOS(config-if)# ipv6 nd ns-interval 500000

11. Configure the value to be placed in the MTU options sent by the router on the interface.

    SEFOS(config-if)# ipv6 nd ra-mtu 1500

12. Configure the minimum and maximum router advertisement time.

    Router advertisements are sent periodically at a random interval between the values specified by the minimum and maximum time values.

    SEFOS(config-if)# ipv6 nd ra-interval 300 200

13. Configure the prefix to be advertised in the IPv6 RA.

    SEFOS(config-if)# ipv6 nd prefix fec0::1111:0:0 96 500 400

14. Review the IPv6 information for all of the IPv6 interfaces.

    SEFOS# show ipv6 interface vlan 1
     
    vlan1 is up, line protocol is up
    ...
        ICMP redirects are enabled
        ND DAD is enabled, Number of DAD attempts: 1
        ND router advertisement is enabled
        ND reachable time is 500000 milliseconds
        ND retransmit time is 500000 milliseconds
        ND router advertisements are sent every 300 seconds
        ND router advertisement Link MTU 1500