With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsOutSegmentPerfErrors
mpls Out Segment Perf Errors
1.3.6.1.3.96.1.7.1.3
Number of packets that could not be sent due to errors on this segment.
Back to MPLS-LSR-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsOutSegmentPerfErrors on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.