Specifications
5-22
Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-5260-01
Chapter 5 Administering the Access Point
Managing the System Time and Date
Optional ARP Caching
When a non-Cisco client device is associated to an access point and is not passing data, the access point
might not know the client’s IP address. If this situation occurs frequently on your wireless LAN, you can
enable optional ARP caching. When ARP caching is optional, the access point responds on behalf of
clients with IP addresses known to the access point but forwards out its radio port any ARP requests
addressed to unknown clients. When the access point learns the IP addresses for all associated clients, it
drops ARP requests not directed to its associated clients.
Configuring ARP Caching
Beginning in privileged EXEC mode, follow these steps to configure the access point to maintain an ARP
cache for associated clients:
This example shows how to configure ARP caching on an access point:
AP# configure terminal
AP(config)# dot11 arp-cache
AP(config)# end
Managing the System Time and Date
You can manage the system time and date on your access point automatically, using the Network Time
Protocol (NTP), or manually, by setting the time and date on the access point.
Note For complete syntax and usage information for the commands used in this section, refer to the Cisco IOS
Configuration Fundamentals Command Reference for Release 12.2.
This section contains this configuration information:
• Understanding the System Clock, page 5-23
• Understanding Network Time Protocol, page 5-23
• Configuring NTP, page 5-24
• Configuring Time and Date Manually, page 5-32
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
dot11 arp-cache [ optional ] Enable ARP caching on the access point.
• (Optional) Use the optional keyword to enable ARP caching only for
the client devices whose IP addresses are known to the access point.
Step 3
end Return to privileged EXEC mode.
Step 4
show running-config Verify your entries.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.