With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
haMNAuthenticationFailure
ha MN Authentication Failure
1.3.6.1.2.1.44.1.6.3.8
Total number of Registration Requests denied by home agent -- mobile node failed authentication (Code 131).
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IPHost Network monitor allows you to monitor haMNAuthenticationFailure on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.