2
Radio Transmit Power
OL-14978-01
Configuring Radio Transmit Power
Determine the Radio Type
Determine the radio type to establish the frequency range and power setting of the radio. Use the
show
controllers dot11Radio
command to show the radio type, frequency, and current channel for the
wireless device. For example:
WD#
show controllers dot11Radio
0
interface Dot11Radio0
!
Radio AIR-AP1242GA, Base Address 0014.1b58.08f
! AIR-AP1242GA radio type shown
Version 5.80.12
Serial number: GAM09200992
Number of supported simultaneous BSSID on Dot1
Carrier Set: Americas (US)
! Domain
DFS Required: No
! DFS requirement
!
Current Frequency: 2412 MHz Channel 1
! Frequency
Configuring Radio Transmit Power
To set the transmit power on the wireless device radio to one of the power levels allowed in your
regulatory domain, use the
power local
interface command.
For all 802.11b 2.4 GHz radios, the settings are in mW:
power local
[
1
|
5
|
20
|
30
|
50
|
100
|
maximum
]
For 802.11g, 2.4 GHz radios where the settings are in mW:
power local
{
cck
|
ofdm
} [
1
|
5
|
20
|
30
|
50
|
100
|
maximum
]
For the 802.11g, 2.4 GHz radio where the settings are in dBm:
power local
{
cck
|
ofdm
} [
1
|
2
|
5
|
8
|
11
|
14
|
16
|
17
|
20
|
maximum
]
For 802.11a, 5 GHz radios or 4.9 GHz radios where the settings are in mW:
power local
{
cck
|
ofdm
} [
5
|
10
|
20
|
40
|
maximum
]
The maximum power level for a 4.9 GHz (US Only, Public Safety) radio is 40 mW.
For 802.11a, 5 GHz radio where the settings are in dBm:
power local
{
cck
|
ofdm
} [
1
|
2
|
5
|
8
|
11
|
14
|
16
|
17
|
maximum
]
Complementary Code Keying (CCK) is supported by 802.11b and 802.11g devices. Orthogonal
Frequency Division Multiplexing (OFDM) is supported by 802.11g and 802.11a devices.
Note
The structure of this command is determined by the radio in the wireless device and the settings
allowed in your regulatory domain. To display the options for your wireless infrastructure device
running your image, use the
power local ?
command in privileged EXEC mode.
Use the
no
form of the power command to return the power setting to
maximum
, the default setting.
