With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
lecMaxUnknownFrameTime
Lan Emulation Client Max Unknown Frame Time
1.3.6.1.4.1.353.5.3.1.1.1.1.11
C11 Maximum Unknown Frame Time. Within the period of time defined by the Maximum Unknown Frame Time, a LE Client will send no more than Maximum Unknown Frame Count frames to the BUS for a given unicast LAN Destination, and it must also initiate the address resolution protocol to resolve that LAN Destination. This time value is expressed in seconds.
Back to LAN-EMULATION-CLIENT-MIB MIB page.
IPHost Network monitor allows you to monitor lecMaxUnknownFrameTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.