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Cisco Bug: CSCtc52255 - 6.0 1522 on non-dfs backhaul channel changes channels after radar event

Last Modified

Feb 22, 2014

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases

6.0(182.0)

Description (partial)

Symptom:

1522 MAP on 6.0.182.0 wlc appears to drop is Mesh association after detecting a radar event on channel 112 though the MAP is using channel 161 as its backhaul

33 Mon Oct 12 13:36:36 2009 Radar signals have been detected on channel 112 by 802.11a radio with MAC: 00:22:be:43:d6:00 and slot 1                                           
34 Mon Oct 12 13:36:36 2009 AP 'LS06AP0022.be43.d600', MAC: 00:22:be:43:d6:00 disassociated previously due to AP Reset. Uptime: 0 days, 00 h 04 m 47 s . Last reset reason: power loss    LS06

Conditions:

1522 MAP operating on UNII-3 *non-dfs* backhaul channel (161) loses its Mesh association after detecting radar on UNII-2 channel (112).  The AP when it comes back is now using backhaul channel 165.

Cognio traces in the 5Ghz spectrum do show what appear to be radar pulses in the UNII-2 channels.
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