With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsLabelStackGroup
mpls Label Stack Group
1.3.6.1.3.96.3.1.8
Objects needed to support label stacking.
Back to MPLS-LSR-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsLabelStackGroup 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.