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Triggered on Demand RIP Commands

5-144 Configuring the Internet Protocol

Syntax of the “no” Form

Thenocommandresetsmaximumretransmissionstothedefault:

no ip rip polling interval

Mode

Interfaceconfiguration:XSR(config-if<xx>)#

Default

30seconds

Example

Thefollowingexamplesetsthepollingintervalto120seconds:

XSR(config)#interface serial 1/0

XSR(config-if<S1/0>)#ip address 1.0.0.0 255.0.0.0

XSR(config-if<S1/0>)#no shutdown

XSR(config-if<S1/0>)#ip rip triggered-on-demand

XSR(config-if<S1/0>)#ip rip polling-interval 120

XSR(config)#router rip

XSR(config-router)#network 1.0.0.0

ip rip triggered-on-demand

Thiscommandenablestriggered‐on‐demandRIPonthespecifiedinterface.Itisavailableona

point‐to‐pointSerial(WAN)interfaceonly.

On‐demandRIPpermitstheupdateofanXSR’sRIProutingtableonlywhenthedatabasechanges

orwhenanexthop’sreachabilityisdetectedontheWAN

sideoftheconnection.This

functionalityreducestheon‐demandWANcircuit’sroutingtrafficandallowsthelinktobe

broughtdownwhenapplicationtrafficceases.RegularRIPupdateswouldpreventtheconnection

frombeingtorndownwhenapplicationuseends.

On‐demandRIPisavailableunderconditionswheretheroute

islearnedthroughadialerordialer

backupconnectionandadialondemandlink.

Thefollowingconditionsgovernthecommand’suse:

•RIPmustbeenabled.

•IPsplithorizonmustbeenabled(default).Whetherpoisonisenabledornot,triggeredon

demandwillstillsenditsupdateswithpoison.

Anothercommand

, ip rip disable-triggered-updates,withthedefaultenforced(triggered

updatesenabled),invokestriggeredupdatesinatimelyfashionasdescribedbyRFCs‐1058and

2453(RIPandRIPv2protocol)anddoesnotteardowntheconnection.Thetwofeatureswork

independentofeachother.

Syntax

ip rip triggered-on-demand

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