With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanStatsInTopoChkSumFrames
rpr Span Stats In Topo Chk Sum Frames
1.0.8802.17.1.1.1.3.4.1.24
The number of received (PHY to MAC) topology checksum frames processed by this MAC.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanStatsInTopoChkSumFrames on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.