With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsVpnVrfSecIllegalLabelViolations
mpls Vpn Vrf Sec Illegal Label Violations
1.3.6.1.3.118.1.2.6.1.1
Indicates the number of illegally received labels on this VPN/VRF.
Back to MPLS-VPN-MIB MIB page.
IPHost Network monitor allows you to monitor mplsVpnVrfSecIllegalLabelViolations 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.