With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vsanWwnListWwn
vsan Wwn List Wwn
1.3.6.1.4.1.9.9.282.1.2.3.1.3
The Port WWN associated with this entry.
Back to CISCO-VSAN-MIB MIB page.
IPHost Network monitor allows you to monitor vsanWwnListWwn 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.