Radio Channel and Transmit Frequency Configuration
Additional Information
3
Radio Channels and Transmit Frequencies
OL-11491-03
Configuring the Radio Channel Spacing
To set the radio channel width, use the following command, beginning in privileged EXEC mode:
channel
{
width
{
5
|
10
|
20
}
| channel_number
|
frequency
|
least_congested
}
Configuring Radio Channel Spacing on Releases Before 12.3(2)JL
To set the radio channel spacing on earlier releases (12.3(2)JL), use the following command:
spacing
{
5
|
10
|
20
}
channel
Additional Information
For general information on channel selection and transmit power, see the “FCC Regulations Update For
2004” white paper at:
http://www.cisco.com/en/US/products/hw/wireless/ps4555/products_white_paper0900aecd801c4a88.s
html
Additional information on DFS and TPC can be found in the Cisco “Dynamic Frequency Selection and
IEEE 802.11h Transmit Power Control” document available at:
http://www.cisco.com/en/US/products/ps6441/products_feature_guide09186a008060f7c2.html
For additional information on the 4.9 GHz (public safety) band, see the “Cisco Support for 4.9 GHz
Public Safety Broadband Spectrum in the US” white paper at:
http://www.cisco.com/en/US/products/hw/routers/ps272/prod_brochure0900aecd802d816e.html
Step 3
channel
{
channel_number
|
frequency
|
least_congested
}
Sets the channel for the wireless device radio.
You can specify which channel to use by providing the
channel’s number or frequency.
To automatically search for the least congested channel on
startup and use this channel for the wireless device radio, use
the
least-congested
option.
When specifying a frequency, enter the center frequency for the
radio channel. The valid frequencies and channel numbers
depend on the channels allowed in the regulatory domain.
Step 4
end
Returns to privileged EXEC mode.
Command
Purpose
Command
Purpose
Step 1
configure terminal
Enters global configuration mode.
Step 2
interface dot11radio
port
Enters interface configuration mode for the radio interface.
Step 3
channel
{
width
{
5
|
10
|
20
}
|
channel_number
|
frequency
|
least_congested
}
Sets the channel
width
to 5 MHz, 10 MHz, or 20 MHz.
Sets the channel number or frequency for the wireless device
radio. Or, you can set the device to seek the least congested
channel.
Step 4
end
Returns to privileged EXEC mode.
