Quick Reference Guide

394 | Routing Commands
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clear arp-cache
This command causes all ARP entries of type dynamic to be removed from the ARP cache. If the
gateway parameter is specified, the dynamic entries of type gateway are purged as well.
Syntax
clear arp-cache [gateway]
Mode
Privileged Exec
ip proxy-arp
This command enables proxy ARP on a router interface.
Without proxy ARP, a device only responds to an ARP request if the target IP address is an address
configured on the interface where the ARP request arrived. With proxy ARP, the device may also
respond if the target IP address is reachable. The device only responds if all next hops in its route to the
destination are through interfaces other than the interface that received the ARP request.
Syntax
[no] ip proxy-arp
The no version of this command disables proxy ARP on a router interface.
Default
enabled
Mode
Interface Config or Interface VLAN
Command
History
show arp
This command is only available for the Layer 3 software package. It displays the Address Resolution
Protocol (ARP) cache, all the ARP entries learned through the routing engine.
The displayed results are not the total ARP entries. To view the total ARP entries, combine the show
arp results with the show arp switch results (That command is available in the base Layer 2
software package.)
Syntax
show arp
Mode
Privileged Exec
Version 2.3
Modified: Added Interface VLAN
as a mode.