With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanChanges
rpr Span Changes
1.0.8802.17.1.1.1.1.3.1.7
Indicates number of times rprSpanLastChange changed. The discontinued counter value is indicated by the ifCounterDiscontinuityTime value.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanChanges on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.