configure ospfv3 interface timer

configure ospfv3 [vlan vlan_name | tunnel tunnel_name | [vlan | tunnel] all] timer {retransmit-interval} retransmit_interval {transit-delay} transit_delay {hello-interval} hello_interval {dead-interval} dead_interval


Configures the timers for all interfaces in the same OSPFv3 area.

Syntax Description

vlan_name Specifies an IPv6 configured VLAN.
tunnel_name Specifies an IPv6 tunnel.
all Specifies all IPv6 configured VLANs or all IPv6 tunnels.
retransmit_interval Specifies the length of time that the router waits before retransmitting an LSA that is not acknowledged. The range is 1 to 3600 seconds.
transit_delay Specifies the length of time it takes to transmit an LSA packet over the interface. The range is 1 to 3600 seconds.
hello_interval Specifies the interval at which routers send hello packets. The range is 1 to 65535 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 65535 seconds.


Usage Guidelines

Use this command to configure the OSPFv3 timers on a per-interface basis.

Specify the following:
  • 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.



The wait interval for the interface is not separately configurable. It is always equal to the dead interval.


The following command sets the timers for the VLAN corporate:

configure ospfv3 vlan corporate timer retransmit-interval 10 transit-delay 2 hello-interval 20 dead-interval 80


This command was first available in ExtremeXOS 11.2.

Platform Availability

This command is available on platforms with Base license, or higher, as described in the Switch Engine 32.2 Feature License Requirements document.