With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcsPortName
Cisco Fabric Configuration Server Port Name
1.3.6.1.4.1.9.9.297.1.1.15.1.1
The WWN of the port for which this row contains information.
Back to CISCO-FCS-MIB MIB page.
IPHost Network monitor allows you to monitor fcsPortName on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.