RIP timers

RIP (Routing Information Protocol) uses the following timers:

Update— The time interval between each update. It is set to 30 seconds, by default.

Invalid— The time after which a suspect route becomes invalid. It is set to 180 seconds,

by default.

Hold-down— The time used to suppress the possibility of defective routes being installed in the routing table. The default time is 180 seconds.

Flush— The time after that a route is removed from the Routing Table.It is set to 240 seconds, by default

All these timer values are configurable with timers basic command

Configuration example :

Before the configuration of timers basic command:

Router#show ip protocols   

Routing Protocol is "rip"

  Sending updates every 30 seconds, next due in 10 seconds

  Invalid after 180 seconds, hold down 180, flushed after 240

router rip

timers basic 5 15 15 30

Router#show ip protocols

Routing Protocol is "rip"

  Sending updates every 5 seconds, next due in 28 seconds

  Invalid after 15 seconds, hold down 15, flushed after 30