Switch User Manual

ip proxy-arp
19-14 IP Configuration
Defaults
None.
Mode
Globalconfiguration:C3(su)‐>router(Config)#
Usage
TheIPaddressspecifiedforthestaticARPentrymustfallwithinoneofthesubnetsornetworks
definedontheroutedinterfacesofthesystem(orstack,ifapplicable).Thesystemcanthenmatch
theIPaddressofthestaticARPentrywiththeappropriateroutedinterfaceandassociate
itwith
thecorrectVLAN.
Example
ThisexampleshowshowtoaddapermanentARPentryfortheIPaddress130.2.3.1andMAC
address0003.4712.7a99:
C3(su)->router(Config)#arp 130.2.3.1 0003.4712.7a99
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.TheSecureStack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ARPonVLAN1:
C3(su)->router(Config)#interface vlan 1
C3(su)->router(Config-if(Vlan 1))#ip proxy-arp