Timers

RIP uses the following timers to determine the frequency of RIP updates and the duration that routes are maintained.

• update

  Times the interval between periodic routing updates.

• timeout

  This timer is initialized when a route is established and any time an update message is received for the route. When this timer expires, the route is no longer valid. It is retained in the table for a short time, so that neighbors can be notified that the route has been dropped.

• flush

  When the flush timer expires, the route is removed from the tables.