With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dsgIfVendorOUI
dsg If Vendor OUI
The Vendor assigned Organization Unique Id (OUI).
Back to DSG-IF-MIB MIB page.
IPHost Network monitor allows you to monitor dsgIfVendorOUI on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.