With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwdIfUpChannelSubChannelNumber
cwd If Up Channel Sub Channel Number
1.3.6.1.4.1.9.9.167.1.1.4.1.1
This identifies the sub-channel used by this upstream.
Back to CISCO-WIRELESS-DOCS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwdIfUpChannelSubChannelNumber on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.