cIsnsSrvrInstTcpPort 1.3.6.1.4.1.9.10.116.1.1.1.1.7

Indicates the TCP port this iSNS instance is accepting iSNSP messages on, generally the iSNS well known port. The well known TCP port for iSNSP is 3205. If TCP is not supported by this server instance, then the value is 0.