Cisco Systems DL-2159-05 manual Default Radio Channel, Search for Less-Congested Radio Channel

Chapter 3 Radio Configuration and Basic Settings

Radio Configuration

Note If client devices using power-save mode wake up too often when associated to the access point, increase the data beacon rate setting.

Default Radio Channel

The default channel settings on the radios are the lowest channel numbers for your regulatory domain. In North America, the default setting for the internal radio is channel 1 transmitting at 2412 MHz, and the default setting for the radio module is channel 36 transmitting at 5180 MHz. To overcome interference problems, other channel settings are available from the radio channel pull-down menus.

The internal radio operates on 11 channels from 2412 to 2462 MHz. Each channel covers 22 MHz. The bandwidth for channels 1, 6, and 11 does not overlap, so you can set up multiple access points in the same vicinity without causing interference.

The radio module operates on eight channels from 5180 to 5320 MHz. Each channel on the radio module covers 20 MHz, and the bandwidth for the channels overlaps slightly. For best performance, use channels that are not adjacent (44 and 46, for example) for radios that are close to each other.

Note Too many access points in the same vicinity creates radio congestion that can reduce throughput. A careful site survey can determine the best placement of access points for maximum radio coverage and throughput.

Search for Less-Congested Radio Channel

When you select yes from the Search for less-congested radio channel pull-down menu, the access point scans for the radio channel that is least busy and selects that channel for use. The access point scans at power-up and when the radio settings are changed.

Note If you need to keep the access point assigned to a specific channel to keep from interfering with other access points, you should leave this setting at no.

Restrict Searched Channels

Click Restrict Searched Channels to limit the channels that the access point scans when Search for less-congested radio channel is enabled. The AP Radio Restrict Searched Channels page appears when you click Restrict Searched Channels. Figure 3-8shows the AP Radio Restrict Searched Channels page for the internal radio.

Cisco Aironet 1200 Seres Access Point Software Configuration Guide

3-14 OL-2159-05