With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
srpErrCntCurrHostRxDiscardPkts
srp Err Cnt Curr Host Rx Discard Packets
1.3.6.1.4.1.9.10.60.4.3.1.7
The counter associated with the current number of packets which were prevented from being delivered to the Higher Layer because of a resource limitation, in the current 15 minute interval.
Back to CISCO-SRP-MIB MIB page.
IPHost Network monitor allows you to monitor srpErrCntCurrHostRxDiscardPkts 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.