With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csiSessionPeerNwwn
csi Session Peer Nwwn
1.3.6.1.4.1.9.9.378.1.1.2.1.7
The WWN of the remote node for this session.
Back to CISCO-SVC-INTERFACE-MIB MIB page.
IPHost Network monitor allows you to monitor csiSessionPeerNwwn on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.