With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cl2DevMonActiveEntry
Cisco Layer 2 Device Monitoring Device Monitor Active Entry
1.3.6.1.4.1.9.9.271.1.1.3.1
An entry in the cl2DevMonActiveTable table.
Back to CISCO-L2-DEV-MONITORING-MIB MIB page.
IPHost Network monitor allows you to monitor cl2DevMonActiveEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.