With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwSuccessfulSecurityKeyExchange
Cisco's ASN Gateway Successful Security Key Exchange
1.3.6.1.4.1.9.9.638.1.3.1.1.1.84
The number of successful Security Key exchange related to handoff between base stations.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwSuccessfulSecurityKeyExchange on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.