The port number is the logical port number for the node. This number is used with the database manager instance name to identify a TCP/IP service name entry in the etc/services file. This number is stored in the db2nodes.cfg file.
The combination of the IP address (host name) and the logical port is used as a well-known address, and must be unique among all applications to support communication connections between nodes.
For each displayed host name, one port number will be 0. Port number 0 indicates the default node on the host to which clients connect. (To override this behavior, use the DB2NODE environment variable in db2profile script.)
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