With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsOutSegmentPerfOctets
mpls Out Segment Perf Octets
1.3.6.1.3.96.1.7.1.1
This value contains the total number of octets sent on this segment. It MUST be equal to the least significant 32 bits of mplsOutSegmentPerfHCOctets if mplsOutSegmentPerfHCOctets is supported according to the rules spelled out in RFC2863.
Back to MPLS-LSR-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsOutSegmentPerfOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.