With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cfcmPortNodeWwn
Fibre Channel Management Port Node Wwn
1.3.6.1.4.1.9.10.999999.1.3.1.3
The World Wide Name of the Node which contains this port, or the zero-length string if the port does not have a node WWN.
Back to CISCO-FC-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cfcmPortNodeWwn 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.
