Specifications

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Cisco Wireless LAN Controller Configuration Guide
OL-21524-02
Chapter 4 Configuring Controller Settings
Configuring 802.11 Bands
Figure 4-11 802.11a Global Parameters Page
Step 2
Select the 802.11a (or 802.11b/g) Network Status check box to enable the 802.11a or 802.11b/g band.
To disable the band, unselect the check box. The default value is enabled. You can enable both the
802.11a and 802.11b/g bands.
Step 3 If you enabled the 802.11b/g band in Step 2, select the 802.11g Support check box if you want to enable
802.11g network support. The default value is enabled. If you disable this feature, the 802.11b band is
enabled without 802.11g support.
Step 4 Specify the rate at which the SSID is broadcast by the access point by entering a value between 100 and
600 milliseconds (inclusive) in the Beacon Period text box. The default value is 100 milliseconds.
Note The beacon period in controllers is listed in terms of milliseconds. The beacon period can also be
measured in time units, where one time unit equals 1024 microseconds or 102.4 milliseconds. If a beacon
interval is listed as 100 milliseconds in a controller, it is only a rounded off value for 102.4 milliseconds.
Due to hardware limitation in certain radios, even though the beacon interval is, say 100 time units, it is
adjusted to 102 time units, which roughly equals 1044.48 milliseconds. When the beacon period is to be
represented in terms of time units, the value is adjusted to the nearest multiple of 17.
Step 5 Specify the size at which packets are fragmented by entering a value between 256 and 2346 bytes
(inclusive) in the Fragmentation Threshold text box. Enter a low number for areas where communication
is poor or where there is a great deal of radio interference.
Step 6 Make access points advertise their channel and transmit power level in beacons and probe responses.
Select the DTPC Support check box. Otherwise, unselect this check box. The default value is enabled.
Client devices using dynamic transmit power control (DTPC) receive the channel and power level
information from the access points and adjust their settings automatically. For example, a client device
used primarily in Japan could rely on DTPC to adjust its channel and power settings automatically when
it travels to Italy and joins a network there.