The timers ripng command configures RIPng timers.
The undo timers ripng command restores the default values of timers.
By default, the interval for sending RIPng Update packets is 30s, the aging time of routes is 180s, and the time for deleting routes from an IPv6 routing table is 120s.
| Parameter | Description | Value |
|---|---|---|
| update | Specifies the interval for sending Update packets. This parameter is the basic timing parameter of routing protocols. | The value is an integer that ranges from 1 to 86400, in seconds. The default value is 30 seconds. |
| age | Specifies the aging time of routes. The value of age must be at least three times the value of update. If no Update packet of a route is received within the aging time, the route becomes invalid (unreachable). | The value is an integer that ranges from 1 to 86400, in seconds. The default value is 180 seconds. |
| garbage-collect | Specifies the time from when a route is found invalid until it is deleted from the routing table. | The value is an integer that ranges from 1 to 86400, in seconds. The default value is 120 seconds. |
The basic timing parameters of RIPng can be adjusted because RIPng adopts a distributed asynchronous routing algorithm. On the network, these parameters on switches need to be consistent with those on access servers.
The command can take effect only after the global IPv6 is enabled.
If the values of the preceding four timers are set improperly, route flapping occurs. The relationship of the values of the four timers is: update < age and update < garbage-collect. For example, if the update time is longer than the aging time, switches cannot inform neighbors on time if RIPng routes change during the update time.