CCNA Certification: Configure RIP Timers

The RIP routing protocol has 4 occasions that it used them to handle the interval time between two consecutive updates, managing RIP routes, and stopping RIP routing loops. Every timer is expressed in seconds. Within the coming paragraphs, you'll find out how every timer works and the right way to set its worth and confirm whether it is relevant or not.

RIP timers are replace, invalid, holddown, and flush. The replace timer is the period of time at which the router sends RIP updates. By default, RIP updates are despatched each 30 seconds. The invalid timer specifics the period of time that the router ought to wait earlier than it considers a particular route as invalid. This implies, if the router didn’t obtain a RIP replace together with a particular route "X" inside the invalid time interval after the final replace (together with the "X" route), then the route "X" will probably be marked as invalid. The holddown timer determines the period of time that the router ought to wait earlier than accepting new routing details about an unreachable route. The flush timer defines the period of time that router will wait earlier than eradicating an invalid route from the routing desk.

To alter one or all of those timers, use the timers fundamental command. The timers fundamental command has the next syntax:

timers fundamental replace invalid holddown flush

The default values ​​for the replace, invalid, holddown, and flush parameters are 30 seconds, 180 seconds, 180 seconds, and 240 seconds, respectively. This command was launched within the Cisco IOS Software program Launch 10.zero.

The next configuration units the values ​​of replace, invalid, holddown, and flush timers on a router named R1 to 10 seconds, 60 seconds, 60 seconds, and 80 seconds, respectively.

R1 (config) #rout rip
R1 (config-router) #model 2
R1 (config-router) #community 10.zero.zero.zero
R1 (config-router) #community 140.1.zero.zero
R1 (config-router) #no auto-summary
R1 (config-router) #timers fundamental 10 60 60 80
R1 (config-router) # ^ Z
R1 #

To confirm your configuration, you should utilize the present ip protocols command within the privileged EXEC mode. Take into account that brief replace timer may cause congestion over show-speed serial hyperlinks.

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