With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dmPrincipalSwitchWwn
Cisco Domain Management Principal Switch Wwn
1.3.6.1.4.1.9.9.302.1.1.1.1.9
The WWN of the Principal Switch on this VSAN, or zero-length string if the identity of the principal switch is unknown.
Back to CISCO-DM-MIB MIB page.
IPHost Network monitor allows you to monitor dmPrincipalSwitchWwn on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.
