With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdrDot11NewFrequency
Cisco Root Device Dot11 New Frequency
1.3.6.1.4.1.9.9.627.1.2.1
This is the IEEE 802.11a/h channel frequency that specify the new channel that the AP has switched to after (1) it has detected radar, or (2) received report from a client indicating that it has detected radar. The value of zero indicates that dynamic frequency selection has not completed after reset.
Back to CISCO-DOT11-RADAR-MIB MIB page.
IPHost Network monitor allows you to monitor cdrDot11NewFrequency on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.
