With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mpcStatRxMpoaResolveReplyInsufECResources
mpc Stat Rx Mpoa Resolve Reply Insuf EC Resources
1.3.6.1.4.1.353.5.8.1.1.2.5.1.3
The number of MPOA Resolution Replies received with an 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 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 mpcStatRxMpoaResolveReplyInsufECResources on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.