With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
busIfIndex
Cisco BUS If Index
1.3.6.1.4.1.9.9.40.1.1.1.6
The interface that a BUS will forward traffic over. The value specified for this object must equate to a value of ifIndex in the ifTable. The interface will be for that particular ATM port (the physical interface, not a logical layer on top of it). This object can only be specified upon row creation and cannot be altered there after.
Back to CISCO-BUS-MIB MIB page.
IPHost Network monitor allows you to monitor busIfIndex 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.