With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsInterfaceOutLabelsUsed
mpls Interface Out Labels Used
1.3.6.1.3.96.1.2.1.5
Indicates the number of top-most labels in the outgoing label stacks that are in use at this point in time on this interface.
Back to MPLS-LSR-MIB MIB page.
IPHost Network monitor allows you to monitor mplsInterfaceOutLabelsUsed 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.