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Enterasys Networks XSR CLI Router User Manual

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Virtual Router Redundancy Protocol Commands

5-196 Configuring the Internet Protocol

vrrp <group> track

ThiscommandallowsaVirtualRouter(VR)totrackanotherinterface(FastEthernet,Serial,Dialer

orMultilinkPPP)oroneormoeroutesonthesamerouter.

WheninterfaceAisconfiguredtotrackinterfaceB,interfaceAwillmonitorthestatusofinterface

Btodecideifitwantstobecome

themasterofaVR.WheninterfaceBgoesdown,itwilllowerits

priorityto0(zero)andrefrainfromparticipatingintheVRmasterselection.butwillcontinueto

monitorinterfaceB.WheninterfaceBcomesup,interfaceAwillincreaseitsVRprioritybackto

theoriginalvalue.

IfinterfaceAisoriginallyconfiguredasabackupVR,nopreemptionwill

occur,butinterfaceAwillresumebeingthebackupVR.

Thiscommandshouldbeusedontheinterfacethatismostlikelytobeselectedasmasterofthe

correspondingVR.Iftheinterfaceisconfiguredasa

backupVR,thecommandhasnoeffect.

Whenyouconfigurewatchlisttracking,ifallroutesfail,theVRwillloweritspriorityto0and

whenatleastoneoftheroutescomeup,theVRwillreturntoitsoriginalpriority.When

specifyingawatch‐group,beawarethatyou

canusetheassociated dialer watch-list

command.

Syntax of the “no” Form

vrrp <group> track <interface-type> watch-group watch-list-number

Syntax of the “no” Form

Thenoformofthiscommanddisablesthefunctionality:

no vrrp group track

Defaults

•Nointerfacetracking.

•Ifnogroupisprovided,thedefaultgroupis1.

Mode

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

Example

ThisexampleenablesthetrackingofinterfaceSerial1/0byinterfaceF1onVR2:

Notes: This command should be used on the interface most likely to be chosen master of the

corresponding VR. The command has no effect if the interface is configured as a backup VR.

The XSR supports one track interface per VR only, so every time it is configured, the router will

overwrite the previous one.

Caution: When you configure the track interface, the VR IP address you specify must be different

than the physical IP address of the interface otherwise client ARP tables will not be correctly

updated.

group

VRgroupnumber,rangingfrom1to255.

interface-type

Nameandnumberoftheinterfacetomonitor.

watch-list-number

NumberoftheDialerwatch‐listtomonitor,rangingfrom1to255.

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