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Configuration Commands
145
Static ARP configuration
Static ARP entries are permanent in the ARP cache and do not age out like the ARP entries that are
learnt dynamically. Static ARP entries enable the switch to reach the hosts without sending an ARP
broadcast request to the network. Static ARPs are also useful to communicate with devices that do
not respond to ARP requests. Static ARPs can also be configured on some gateways as a protection
against malicious ARP Cache corruption and possible DOS attacks.
The following table describes the Static ARP Configuration commands.
Table 123 Static ARP Configuration commands
Command Description
ip arp <IP address> <MAC
address> <VLAN number> <port
number>
Adds a permanent ARP entry.
Command mode: Global configuration
no ip arp {<IP address>}
Deletes a permanent ARP entry.
Command mode: Global configuration
clear ip arp-cache
Clears static ARP entries.
Command mode: Global configuration
show ip arp static
Displays current static ARP configuration.
Command mode: All except User EXEC