Configures the timers for all interfaces in the same OSPFv3 area.
| area_identifier | Specifies an OSPFv3 area, a four-byte, dotted decimal number. |
| retransmit_interval | Specifies the length of time that the router waits before retransmitting an LSA that is not acknowledged. The range is 1 to 1,800 seconds. |
| transit_delay | Specifies the length of time it takes to transmit an LSA packet over the interface. The range is 1 to 1,800 seconds. |
| hello_interval | Specifies the interval at which routers send hello packets. The range is 1 to 65,535 seconds. |
| dead_interval | Specifies the interval after which a neighboring router is declared down due to the fact that hello packets are no longer received from the neighbor. The range is 1 to 65,535 seconds. |
Retransmit interval—Default: 5 seconds
Transit delay—Default: 1 second
Hello interval—Default: 10 seconds
Dead interval—Default: 40 seconds
Configuring OSPFv3 timers on a per-area basis is a shorthand for applying the timers to each VLAN and tunnel in the area at the time of configuration. If you add more VLANs or tunnels to the area, you must configure the timers for them explicitly.
Retransmit interval—If you set an interval that is too short, unnecessary retransmissions will result.
Transit delay—The transit delay must be greater than 0.
Hello interval—Smaller times allow routers to discover each other more quickly, but also increase network traffic.
Dead interval—This interval should be a multiple of the hello interval.
The value of the dead interval and the hello interval must be same for all OSPFv3 routers connected to a common link. The value of the dead interval and the hello interval are advertised by OSPFv3 in Hello packets. The shorter the hello interval, the earlier topological changes will be detected, but more routing traffic will ensue.
The retransmit interval must be greater than the expected round trip delay between any two routers on the attached network. The setting of this parameter must be conservative, or needless retransmission will result.
Note
The wait interval for the interface is not separately configurable. It is always equal to the dead interval.
The following command sets the timers in area 0.0.0.2:
configure ospfv3 area 0.0.0.2 timer 10 1 20 200
This command was first available in ExtremeXOS 11.2.
This command is available on platforms with Base license, or higher, as described in the Switch Engine v33.1.1 Licensing Guide document.