With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvsCoreSwitchID
cvs Core Switch ID
1.3.6.1.4.1.9.9.388.1.2.1.1.1
The switch number as an identifier for a core switch. If the priority value is the same, the higher switch number has the precedence to be the active core switch.
Back to CISCO-VIRTUAL-SWITCH-MIB MIB page.
IPHost Network monitor allows you to monitor cvsCoreSwitchID 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.