With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
lesClientTable
les Client Table
1.3.6.1.4.1.9.9.39.1.2.1
A (conceptual) table listing the clients associated with a LES. Note that the local or network management will not create or destroy rows in this table but may only inspect what LECs are currently joined with the LES.
Back to CISCO-LES-MIB MIB page.
IPHost Network monitor allows you to monitor lesClientTable 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.
