With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvsDomain
cvs Domain
1.3.6.1.4.1.9.9.388.1.1.1
The virtual switch domain identifier to recognize a virtual switch domain. Only Switches with the same domain number can be in the same virtual switch. 0 means no switch domain configured.
Back to CISCO-VIRTUAL-SWITCH-MIB MIB page.
IPHost Network monitor allows you to monitor cvsDomain 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.