With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanErrorIntervalScffErrors
rpr Span Error Interval Scff Errors
1.0.8802.17.1.1.1.5.2.1.16
The number of received (PHY to MAC) errored SCFF, with bad parity, bad FCS, or both.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanErrorIntervalScffErrors 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.