With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dmEntry
Cisco Domain Management Entry
1.3.6.1.4.1.9.9.302.1.1.1.1
An entry provides information on the domain manager for a VSAN.
Back to CISCO-DM-MIB MIB page.
IPHost Network monitor allows you to monitor dmEntry 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.