With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
lecMappingIndex
Lan Emulation Client Mapping Index
1.3.6.1.4.1.353.5.3.1.1.3.1.1
The 'lecIndex' of the client which implements the specified interface.
Back to LAN-EMULATION-CLIENT-MIB MIB page.
IPHost Network monitor allows you to monitor lecMappingIndex 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.