With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mpsStatRxMpoaImpReplyInsufECResources
mps Stat Rx Mpoa Imp Reply Insuf EC Resources
1.3.6.1.4.1.353.5.8.1.1.3.4.1.13
The number of MPOA Cache Imposition Replies received by this MPS which contain the MPOA CIE Code of 0x81, `Insufficient resources to accept egress cache entry'. Discontinuities in the value of this counter can occur at re-initialization of the management system, and/or re-initialization of the MPS, and at other times, as indicated by the value of mpsDiscontinuityTime.
Back to MPOA-MIB MIB page.
IPHost Network monitor allows you to monitor mpsStatRxMpoaImpReplyInsufECResources 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.