With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwr1MinErrorFreeSeconds
cwr1 Minimum Error Free Seconds
1.3.6.1.4.1.9.9.136.1.6.5.1.3
This object represents the cumulative Codeword Error Free Seconds (EFS) detected since link power up, captured at cwr1MinUpdateTime.
Back to CISCO-WIRELESS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwr1MinErrorFreeSeconds 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.