Specifications

Chapter 3 Configuring the Radio and Basic Settings
Radio Configuration
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Cisco Aironet Access Point Software Configuration Guide
OL-0657-07
Note When you enable MIC, only MIC-capable client devices can communicate with
the access point.
Temporal Key Integrity Protocol
This setting enables the temporal key integrity protocol (TKIP, or WEP key
hashing), which defends against an attack on WEP in which the intruder uses the
unencrypted initialization vector (IV) in encrypted packets to calculate the WEP
key. TKIP removes the predictability that an intruder relies on to determine the
WEP key by exploiting IVs. Select Cisco from the drop-down menu and click
Apply to enable TKIP.
Note To use TKIP, the Use Aironet Extensions setting on the AP Radio Advanced page
must be set to yes (the default setting).
Note When you enable TKIP, all WEP-enabled client devices associated to the access
point must support WEP key hashing. WEP-enabled devices that do not support
key hashing cannot communicate with the access point.
Broadcast WEP Key rotation interval (sec)
This option enables broadcast key rotation by setting a key rotation interval. With
broadcast, or multicast, WEP key rotation enabled, the access point provides a
dynamic broadcast WEP key and changes it at the interval you select. Broadcast
key rotation is an excellent alternative to TKIP if your wireless LAN supports
wireless client devices that are not Cisco devices or that cannot be upgraded to the
latest firmware for Cisco client devices.
To enable broadcast key rotation, enter the rotation interval in seconds in the
Broadcast WEP Key rotation interval entry field. If you enter 900, for example,
the access point sends a new broadcast WEP key to all associated client devices
every 15 minutes. To disable broadcast WEP key rotation, enter 0.