Configure IPv6 Router Advertisement

As a best practice, ensure that the interval between router advertisement transmission is less than or equal to the router lifetime value if the router is advertised as a default route.

Access global configuration mode.
```
device# configure terminal
```
Access interface configuration mode.
```
device# interface ethernet 0/1
```
Configure the number of seconds that a router is advertised as the default router on an interface.
```
device(config-if-eth-0/1)# ipv6 nd ra-lifetime 1900
```
If you set the lifetime to 0, the router is not advertised as a default router.
Configure the maximum and minimum intervals (in seconds) during which router advertisement messages are sent randomly.
```
device(config-if-eth-0/1)# ipv6 nd ra-interval 1200 min 400
```
Specify the maximum number of hops to advertise in advertisement messages.
```
device(config-if-eth-0/1)# ipv6 nd hoplimit 32
```
Specify the size of the maximum transmission unit (MTU) that is advertised in an advertisement message.
```
device(config-if-eth-0/1)# ipv6 nd mtu 2400
```