Cisco aironet 1522 Design And Deployment Manual page 143

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Monitoring DFS
DFS history should be run every morning or more frequently to detect the radar. This information does
not get erased and is stored on the mesh access point flash. Therefore, you only need to match up times.
Information similar to this displays:
Cisco Aironet 1520, 1130, 1240 Series Wireless Mesh Access Points, Design and Deployment Guide, Release 6.0
OL-20213-01
To identify channels available for mesh on the AP console (or using remote debug from the
controller, enter:
ap1520-rap # show mesh channels
HW: Dot11Radio1, Channels:
100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
An asterisk next to a channel indicates that radar has been seen on the channel.
Please do a spot check on the mesh access points for radar information using the following remote
debug commands from the controller:
To invoke remote debug:
(Cisco Controller) > debug ap enable <ap name>
(Cisco Controller) > debug ap command <command> <ap name>
Debug commands to see radar detection and past radar detections on the DFS channel are:
show mesh dfs channel <channel number>
show mesh dfs history
Information similar to these example displays.
ap1520-rap # show mesh dfs channel 132
Channel 132 is available
Time elapsed since radar last detected: 0 day(s), 7 hour(s), 6 minute(s), 51
second(s).
The RAPs should then be run through the channels to determine whether there is active radar on each
of the channels.
ap1520-rap # show mesh dfs channel 132
Radar detected on channel 132, channel becomes unusable (Time Elapsed: 0 day(s), 7
hour(s), 7 minute(s), 11 second(s)).
Channel is set to 100 (Time Elapsed: 0 day(s), 7 hour(s), 7 minute(s), 11 second(s)).
Radar detected on channel 116, channel becomes unusable (Time Elapsed: 0 day(s), 7
hour(s), 6 minute(s), 42 second(s)).
Channel is set to 64 (Time Elapsed: 0 day(s), 7 hour(s), 6 minute(s), 42 second(s)).
Channel 132 becomes usable (Time Elapsed: 0 day(s), 6 hour(s), 37 minute(s), 10
second(s)).
Channel 116 becomes usable (Time Elapsed: 0 day(s), 6 hour(s), 36 minute(s), 42
second(s)).
ap1520-rap # show controller dot11Radio 1
interface Dot11Radio1
Radio Hammer 5, Base Address 001c.0e6c.9c00, BBlock version 0.00, Software version
0.05.30
Serial number: FOC11174XCW
Number of supported simultaneous BSSID on Dot11Radio1: 16
Carrier Set: ETSI (OFDM) (EU) (-E)
Uniform Spreading Required: Yes
Current Frequency: 5540 MHz Channel 108 (DFS enabled)
Allowed Frequencies: *5500(100) *5520(104) *5540(108) *5560(112) *5580(116) *560
Troubleshooting
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