Specifications

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Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges
0L-24115-01
Chapter 2 Cisco IOS Commands for Access Points and Bridges
dot11 arp-cache
dot11 arp-cache
Use the dot11 arp-cache global configuration command to enable client ARP caching on the access
point. ARP caching on the access point reduces the traffic on your wireless LAN and increases client
battery life by stopping ARP requests for client devices at the access point. Instead of forwarding ARP
requests to client devices, the access point responds to requests on behalf of associated client devices
and drops ARP requests that are not directed to clients associated to the access point. When ARP caching
is optional, the access point responds on behalf of clients with IP addresses known to the access point
but forwards through its radio port any ARP requests addressed to unknown clients. When the access
point knows all the IP addresses for associated clients, it drops any ARP requests not directed to its
clients. In its beacon, the access point includes an information element to alert client devices that they
can safely ignore broadcast messages to increase battery life.
[no] dot11 arp-cache [optional]
Syntax Description
Defaults ARP caching is disabled by default.
Command Modes Global configuration
Command History
Examples This example shows how to enable ARP caching:
AP(config)# dot11 arp-cache
optional Configures the access point to respond to ARP requests addressed to clients
for which the access point knows the IP address but forward through its
radio port ARP requests addressed to client devices that the access point
does not recognize. When the access point learns all the IP addresses for
associated clients, it drops any ARP requests not directed to its clients.
Release Modification
12.2(13)JA This command was introduced.