With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
portTable
port Table
1.3.6.1.4.1.52.259.10.3.2.4.1
determined by the number of modules in the chassis and the number of ports on each module.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor portTable 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.