With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dmLocalSwitchWwn
Cisco Domain Management Local Switch Wwn
1.3.6.1.4.1.9.9.302.1.1.1.1.10
The WWN of the local Switch on this VSAN.
Back to CISCO-DM-MIB MIB page.
IPHost Network monitor allows you to monitor dmLocalSwitchWwn on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.