cIsnsSrvrInstUdpPort 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.