With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
qosDstMacAddress
qos Dst Mac Address
1.3.6.1.4.1.9.18.2.1.6.1.1.3
The destination MAC address of the L2 frame.
Back to CISCO-QOS-PIB-MIB MIB page.
IPHost Network monitor allows you to monitor qosDstMacAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.