With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIsnsTcpPortNotifctn
Cisco iSNS Tcp Port Notifctn
1.3.6.1.4.1.9.10.116.1.3.1.4
Indicates the TCP port the iSNS server is using, or 0 if TCP based registrations are not supported.
Back to CISCO-IETF-ISNS-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cIsnsTcpPortNotifctn 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.