With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cd11IfVlanBcastKeyCapabilChange
Cisco DOT11 Interfaces Vlan Bcast Key Capabil Change
1.3.6.1.4.1.9.9.272.1.1.1.10.1.4
If it is 'true', a new key will be used every time when the common set of encryption capability among clients of this radio on this VLAN is changed.
Back to CISCO-DOT11-IF-MIB MIB page.
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