With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c2900PortAddrSecureAddrViolations
Cisco 2900 Port Address Secure Address Violations
1.3.6.1.4.1.9.9.87.1.4.1.1.12
The number of times a source address was seen on this port which duplicates a secured address configured on another port, plus the number of times a source address was seen on this port which does not match any addresses secured for the port.
Back to CISCO-C2900-MIB MIB page.
IPHost Network monitor allows you to monitor c2900PortAddrSecureAddrViolations 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.