With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dmAreaTable
Cisco Domain Management Area Table
1.3.6.1.4.1.9.9.302.1.2.1
This table contains area statistics on this domain manager per VSAN. Each octet in the dmAssignedAreaList can be used to index this table to find information on each area.
Back to CISCO-DM-MIB MIB page.
IPHost Network monitor allows you to monitor dmAreaTable 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.