Confirming That Dfs Is Enabled; Cli Commands - Cisco 1941W Configuration Manual
Cisco 3900 series, cisco 2900 series,
cisco 1900 series
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- Hardware installation manual (102 pages) ,
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Configuring Radio Channel Settings
The maximum legal transmit power is greater for some 5-GHz channels than for others. When it
Note
randomly selects a 5-GHz channel on which power is restricted, the access point automatically reduces
transmit power to comply with power limits for that channel.
Note
Cisco recommends that you use the world-mode dot11d country-code configuration interface command
to configure a country code on DFS-enabled radios. The IEEE 802.11h protocol requires access points
to include the country information element (IE) in beacons and probe responses. By default, however,
the country code in the IE is blank. You use the world-mode command to populate the country code IE.
CLI Commands
The following sections describe CLI commands that apply to DFS.
Confirming that DFS is Enabled
Use the show controllers dot11radio1 command to confirm that DFS is enabled. The command also
includes indications that uniform spreading is required and channels that are in the non-occupancy
period due to radar detection.
This example shows a line from the output for the show controller command for a channel on which DFS
is enabled. The indications listed in the previous paragraph are shown in bold:
ap# show controller dot11radio1
!
interface Dot11Radio1
Radio <model>, Base Address 011.9290ec0, BBlock version 0.00, Software version 6.00.0
Serial number FOCO83114WK
Number of supported simultaneous BSSID on Dot11Radio1: 8
Carrier Set: Americas (OFDM) (US )
Uniform Spreading Required: Yes
Current Frequency: 5300 MHz Channel 60 (DFS enabled)
Current Frequency: 5300 MHz
Allowed Frequencies: 5180(36) 5200(40) 5220(44) 5240(48) *5260(52) *5280(56) *53
00(60) *5320(64) *5500(100) *5520(104) *5540(108) *5560(112) *5580(116) *5660(13
2) *5680(136) *5700(140) 5745(149) 5765(153) 5785(157) 5805(161)
* = May only be selected by Dynamic Frequency Selection (DFS)
Listen Frequencies: 5170(34) 5190(38) 5210(42) 5230(46) 5180(36) 5200(40) 5220(4
4) 5240(48) 5260(52) 5280(56) 5300(60) 5320(64) 5500(100) 5520(104) 5540(108) 55
60(112) 5580(116) 5600(120) 5620(124) 5640(128) 5660(132) 5680(136) 5700(140) 57
45(149) 5765(153) 5785(157) 5805(161) 5825(165)
DFS Blocked Frequencies: none
Beacon Flags: 0; Beacons are enabled; Probes are enabled
Current Power: 17 dBm
Allowed Power Levels: -1 2 5 8 11 14 15 17
Allowed Client Power Levels: 2 5 8 11 14 15 17
...
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
276
Channel 60 (DFS enabled)
Chapter
Configuring Radio Settings
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