Specifies the time period for which a neighbor router waits for a hello packet from the device before declaring the router down.
The specified time period is 40 seconds.
Interface subtype configuration mode
If you change the dead interval, the hello interval is automatically changed to a value that is one fourth that of the new dead interval, unless the hello interval is also explicitly configured using the ipv6 ospf hello-interval command.
The recommended setting is that:
The running-config command displays only explicitly configured values of the hello interval, which means that a value that was automatically changed as the result of a dead-interval change is not displayed.
The no form of the command restores the default value.
The following example sets the dead interval to 80 on a specific OSPFv3 Ethernet interface.
device# configure terminal device(config)# interface ethernet 1/1 device(conf-if-eth-1/1)# ipv6 ospf dead-interval 80