With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmnInterfaceGroup
cmn Interface Group
1.3.6.1.4.1.9.9.215.3.2.2
A collection of objects providing the configuration information for MAC notification at each interface.
Back to CISCO-MAC-NOTIFICATION-MIB MIB page.
IPHost Network monitor allows you to monitor cmnInterfaceGroup 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.