Specifications

ip proxy-arp
SecureStack C3 Configuration Guide 15-15
ip proxy-arp
UsethiscommandtoenableproxyARPonaninterface.Thenoformofthiscommanddisables
proxyARP.
Syntax
ip proxy-arp
no ip proxy-arp
Parameters
None.
Defaults
Disabled.
Mode
Interfaceconfiguration:C3(su)‐>router(Config‐if(Vlan1))#
Usage
ThisvariationoftheARPprotocolallowstheroutertosendanARPresponseonbehalfofanend
nodetotherequestinghost.ProxyARPcanbeusedtoresolveroutingissuesonendstationsthat
areunabletorouteinthesubnettedenvironment.TheSecureStackC3willanswertoARP
requests
onbehalfoftargetedendstationsonneighboringnetworks.Itisdisabledbydefault.
Example
ThisexampleshowshowtoenableproxyARPonVLAN1:
C3(su)->router(Config)#interface vlan 1
C3(su)->router(Config-if(Vlan 1))#ip proxy-arp
arp timeout
Usethiscommandtosettheduration(inseconds)fordynamicallylearnedentriestoremaininthe
ARPtablebeforeexpiring.Thenoformofthiscommandrestoresthedefaultvalueof14,400 
seconds.
arp timeout seconds
no arp timeout
Parameters
Defaults
14,400seconds.
Mode
Globalconfiguration:C3(su)‐>router(Config)#
seconds SpecifiesthetimeinsecondsthatanentryremainsintheARPcache.Valid
valuesare0‐65535.Avalueof0specifiesthatARPentrieswillneverbe
agedout.