With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dmLocalPrincipalSwitchSelctns
Cisco Domain Management Local Principal Switch Selctns
1.3.6.1.4.1.9.9.302.1.1.1.1.24
The number of times the local switch became the principal switch on this VSAN.
Back to CISCO-DM-MIB MIB page.
IPHost Network monitor allows you to monitor dmLocalPrincipalSwitchSelctns on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.