With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
filterVendorId
filter Vendor Id
1.3.6.1.4.1.9.5.1.7.2.1.3
source or destination MAC address has the same vendor ID, a match occurs. The packet is dropped if a match occurs and deny(1) was specified. The packet is dropped if a match doesn't occur and at least one Vendor ID filter was specified with permit(3).
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor filterVendorId 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.