With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dot5StatsLineErrors
dot5 Stats Line Errors
1.3.6.1.2.1.10.9.2.1.2
This counter is incremented when a frame or token is copied or repeated by a station, the E bit is zero in the frame or token and one of the following conditions exists: 1) there is a non-data bit (J or K bit) between the SD and the ED of the frame or token, or 2) there is an FCS error in the frame.
Back to TOKENRING-MIB MIB page.
IPHost Network monitor allows you to monitor dot5StatsLineErrors 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.