With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsTunnelIsIf
mpls Tunnel Is If
Denotes whether or not this tunnel corresponds to an interface represented in the interfaces group table. Note that if this variable is set to true then the ifName of the interface corresponding to this tunnel should have a value equal to mplsTunnelName. Also see the description of ifName in RFC 2863. This object is meaningful only at the ingress and egress LSRs.
Back to MPLS-TE-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsTunnelIsIf on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.