With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIsnsRegPortalAddr
Cisco iSNS Registered Portal Address
1.3.6.1.4.1.9.10.116.1.1.7.2.1.1.3
The Internet Address for this Portal as defined in the iSNS Specification [iSNS].
Back to CISCO-IETF-ISNS-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cIsnsRegPortalAddr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.