With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mpcStatRxErrInvalidExtensions
mpc Stat Rx Error Invalid Extensions
1.3.6.1.4.1.353.5.8.1.1.2.5.1.30
The number of Error Indication packets received by this MPC with the error code `Invalid Extensions'. Discontinuities in the value of this counter can occur at re-initialization of the management system, and/or re-initialization of the MPC, and at other times, as indicated by the value of mpcDiscontinuityTime.
Back to MPOA-MIB MIB page.
IPHost Network monitor allows you to monitor mpcStatRxErrInvalidExtensions 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.