With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cDot11ClientWepErrors
Cisco Dot11 Client Wep Errors
1.3.6.1.4.1.9.9.273.1.3.1.1.13
This is the number of packets received from this client which failed to be properly decrypted via the WEP security mechanism.
Back to CISCO-DOT11-ASSOCIATION-MIB MIB page.
IPHost Network monitor allows you to monitor cDot11ClientWepErrors 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.