With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cermResUserTypeResGroupCount
Cisco Embedded Resource Manager Resource User Type Resource Group Count
1.3.6.1.4.1.9.9.510.1.2.4.1.6
This object indicates the number of resource groups in the resource user type. This object value will be equal to the number of resource group entries present in the cermResGroupTable for the resource user type.
Back to CISCO-ERM-MIB MIB page.
IPHost Network monitor allows you to monitor cermResUserTypeResGroupCount 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.