The timers ripng command sets the time for updating, aging, and the time for collecting garbage.
The undo timers ripng command restores the default setting.
By default, the time for updating is 30s, for aging is 180s, and for collecting garbage is 120s.
| Parameter | Description | Value |
|---|---|---|
| update | Specifies the interval for sending Update packets. This is the basic timing parameter of the routing protocol. | The value is an integer ranging from 1 to 86400, in seconds. By default, it is 30 seconds. |
| age | Specifies the time for aging RIPng 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 ranging from 1 to 86400, in seconds. By default, it is 180 seconds. |
| garbage-collect | Specifies the elapsed time from when the suppression time expires to when a route is deleted from the routing table. | The value is an integer ranging from 1 to 86400, in seconds. By default, it 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 routers 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, FWs cannot inform neighbors on time if RIPng routes change during the update time.