Setting the Dead Time of the Neighbor Relationship

If a device does not receive a Hello packet from its neighbor within the dead interval, the device considers the neighbor Down.

Perform the following steps on the OSPFv3 router:

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The interface view is displayed.
Run ospfv3 timer dead interval [ instance instance-id ]
The dead interval is set for the neighbor relationship.

If the dead interval of an OSPFv3 neighbor is shorter than 10s, the session may be closed. Therefore, if dead interval is shorter than 10s, the actual dead interval of an OSPFv3 neighbor is not shorter than 10s. If the conservative mode is configured using the ospfv3 timer hello command, the configured dead timer takes effect even when its value is less than 10s.
Run commit
The configuration is committed.