|Topology Services, Group Services, and Event Management allocate |their port numbers when their control scripts, respectively |hatsctrl, hagsctrl, and haemctrl are run with |the -a flag. Allocated port numbers are saved in the |System Data Repository (SDR). If port numbers are found in the SDR from |a previous invocation of a control script, the saved port numbers are used and |new values are not allocated.
|When the syspar_ctrl -A command is invoked, the |hatsctrl, hagsctrl, and haemctrl scripts are |invoked with the -a flag. As part of installation and |migration procedures, syspar_ctrl -A is invoked. |Specifically, it is invoked as part of the |"Start RSCT subsystems" step in Chapter 2, Installing and configuring a new RS/6000 SP system and in Chapter 4, Migrating the software on your RS/6000 SP system. If port numbers must be |reserved in /etc/services, it must be done prior to |"Start RSCT subsystems" in Chapter 2, Installing and configuring a new RS/6000 SP system or when preparing to migrate as described in Chapter 4, Migrating the software on your RS/6000 SP system.
To reserve a port number, enter it in the /etc/services file on the control workstation using an editor or by invoking the smit clientnet command. The service name and protocol should be specified for the application or subsystem that is using the port number. If the application or subsystem does not run on the control workstation, the port numbers can be reserved by using "dummy" service names. In the latter case, reserve the port number for use with both the tcp and udp protocols.