With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoIfExtUtilIntervalGroup
cisco If Ext Util Interval Group
1.3.6.1.4.1.9.9.276.2.2.14
A collection of objects containing information about calculation interval for utilization rate on interfaces.
Back to CISCO-IF-EXTENSION-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoIfExtUtilIntervalGroup 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.