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Reviewing and Configuring the ARP Table
19-12 IP Configuration
Reviewing and Configuring the ARP Table
Purpose
ToreviewandconfiguretheroutingARPtable,toenableproxyARPonaninterface,and toseta
MACaddressonaninterface.
Commands
show ip arp
UsethiscommandtodisplayentriesintheARP(AddressResolutionProtocol)table.ARP
convertsanIPaddressintoaphysicaladdress.
Syntax
show ip arp [ip-address]|[vlan vlan-id]|[output-modifier]
Parameters
Defaults
Ifnoparametersarespecified,allentriesintheARPcachewillbedisplayed.
Mode
Anyroutermode.
For information about... Refer to page...
show ip arp 19-12
arp 19-13
ip proxy-arp 19-14
arp timeout 19-15
clear arp-cache 19-15
ip‐address (Optional)DisplaysARPentriesrelatedtoaspecificIPaddress.
vlanvlan‐id (Optional)DisplaysonlyARPentrieslearnedthroughaspecificVLAN
interface.ThisVLANmustbeconfiguredforIProutingasdescribedin
“Pre‐RoutingConfigurationTasks”onpage 18‐1.
output‐modifier (Optional)DisplaysARPentrieswithina
specificrange.Optionsare:
–|beginip‐address—DisplaysonlyARPentriesthatbeginwiththe
specifiedIPaddress.
–|excludeip‐address—ExcludesARPentriesmatchingthespecified
IPaddress.
–|includeip‐address—IncludesARPentriesmatchingthespecified
IPaddress.