With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwFailedCMACKeyUpdate
Cisco's ASN Gateway Failed CMAC Key Update
1.3.6.1.4.1.9.9.638.1.3.1.1.1.83
The number of failed CMAC Key count updates related to handoff between base stations.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwFailedCMACKeyUpdate 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.
