With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdpvmRowStatus
Dynamic Port Vsan Membership Row Status
1.3.6.1.4.1.9.9.421.1.1.2.1.5
The status of this conceptual row. Before setting this object to 'active', the cdpvmLoginDev object MUST be set to a valid value. Only cdpvmLoginDevVsan object can be modified when the value of this object is 'active'.
Back to CISCO-DYNAMIC-PORT-VSAN-MIB MIB page.
IPHost Network monitor allows you to monitor cdpvmRowStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.