With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanErrorCountersDayEntry
rpr Span Error Counters Day Entry
1.0.8802.17.1.1.1.5.3.1
An entry in the RPR Error Day table.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanErrorCountersDayEntry 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.