With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanErrorIntervalPmdAbortFrames
rpr Span Error Interval Pmd Abort Frames
1.0.8802.17.1.1.1.5.2.1.12
The number of received (PHY to MAC) unicast frames that were aborted by the PMD layer, in a particular interval in the past 24 hours
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanErrorIntervalPmdAbortFrames 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.