With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIsnsSrvrInstUdpPort
Cisco iSNS Srvr Inst Udp Port
1.3.6.1.4.1.9.10.116.1.1.1.1.8
Indicates the UDP port this iSNS instance is accepting iSNSP messages on, generally the iSNS well known port. The well known UDP port for iSNSP is 3205. If UDP is not supported by this server instance, then the value is 0.
Back to CISCO-IETF-ISNS-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cIsnsSrvrInstUdpPort on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.