With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwrThroughput
Cisco Wireless Throughput
1.3.6.1.4.1.9.9.136.1.3.2.1.3
This represents an throughput expected of the identified radio link. There are 3 possible settings. The settings provide a tradeoff between bandwidth and the reliability of the radio link. The settings are: high(1): For a high throughput. The radio hardware will be configured such that it, favors throughput over error correction. It may not be able to correct all received errors. medium(2): This is a balance between high and low. low(3): The radio hardware is configured such that it trades off throughput for latency and error correction. It tries its very best to correct errors it detects.
Back to CISCO-WIRELESS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwrThroughput 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.