The TCPPORT option specifies the port number on which the server TCP/IP communication driver is to wait for requests for client sessions.
Using different port numbers for the options TCPPORT and TCPADMINPORT enables you to create one set of firewall rules for client sessions and another set for other session types (administrative sessions, server-to-server sessions, Simple Network Management Protocol (SNMP) subagent sessions, storage agent sessions, library client sessions, managed server sessions, and event server sessions). If the two port numbers are different, separate threads will be used to service client sessions and the other session types. If you allow the two options to use the same port number (by default or by explicitly setting them to the same port number), a single server thread will be used to service all session requests.
You can change this option with the SETOPT command. When you change a port, the Tivoli® Storage Manager server starts listening on the new port immediately. All current connections remain in use until closed.
tcpport 1500