Administrator Guide

Example of the show arp Command
These entries do not age and can only be removed manually. To remove a static ARP entry, use the no arp
ip-address
command.
To view the static entries in the ARP cache, use the show arp static command in EXEC privilege mode.
Dell#show arp
Protocol Address Age(min) Hardware Address Interface VLAN CPU
-----------------------------------------------------------------------------------
------
Internet 10.11.68.14 94 00:01:e9:45:00:03 Ma 0/0 - CP
Internet 10.11.209.254 0 00:01:e9:45:00:03 Ma 0/0 - CP
Dell#
Enabling Proxy ARP
By default, Proxy ARP is enabled. To disable Proxy ARP, use the no proxy-arp command in the interface
mode.
To re-enable Proxy ARP, use the following command.
• Re-enable Proxy ARP.
INTERFACE mode
ip proxy-arp
To view if Proxy ARP is enabled on the interface, use the show config command in INTERFACE mode. If it is
not listed in the
show config command output, it is enabled. Only non-default information is displayed in
the show config command output.
Clearing ARP Cache
To clear the ARP cache of dynamically learnt ARP information, use the following command.
• Clear the ARP caches for all interfaces or for a specific interface by entering the following information.
EXEC privilege
clear arp-cache [interface | ip ip-address] [no-refresh]
• ip ip-address (OPTIONAL): enter the keyword ip then the IP address of the ARP entry you wish
to clear.
• no-refresh (OPTIONAL): enter the keywords no-refresh to delete the ARP entry from CAM. Or
to specify which dynamic ARP entries you want to delete, use this option with
interface or ip
ip-address.
• For a port channel interface, enter the keywords port-channel then a number from 1 to 128.
• For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port
information.
• For a VLAN interface, enter the keyword vlan then a number between 1 and 4094.
NOTE: Transit traffic may not be forwarded during the period when deleted ARP entries are resolved again
and re-installed in CAM. Use this option with extreme caution.
IPv4 Routing 458