Determine parameters during automatic configuration

The system can be told which parameters should be used for the controller descriptions that get automatically created and varied on. If a model controller description does not exist for a line that supports automatic configuration, then the automatically created, or varied on controller descriptions use the system-supplied defaults for the various parameters. There are two types of parameters that are specified in the automatically configured controller descriptions:

• Those found during the automatic configuration
• Those specified in the model controller or in the system-supplied defaults

Those found during automatic configuration do not use the values that are specified in the model controller or any system values. They are found when the adjacent system on the LAN calls the iSeries system and participates in a swapping of exchange station IDs (XID). A description of these parameters are as follows:

RMTNETID

Remote network identifier.

RMTCPNAME

Remote control-point name.

ADPTADR

LAN adapter address of the remote system.

SSAP

Source service access point for the connection.

DSAP

Destination service access point for the connection.

NODETYPE

Set to *LENNODE if the remote system does not supply a control-point name on its XID. Otherwise, it is set to *CALC.

TMSGRPNBR

Set to *CALC since the system negotiates this value with the adjacent node.

CPSSN

Set to *NO if the NODETYPE parameter in the automatically configured controller gets set to *LENNODE. Otherwise, it is set to *YES. The system determines if it needs to establish a CP-CP session with the adjacent node. This is determined based on the network server list (if the local system is an end node), or the adjacent system's request for CP session services.

SWTLINLST

Set to the token ring, Ethernet, DDI, or WLS line the call was received on. For automatically configured controller descriptions, there is only one line that is listed in the SWTLINLST. The system may change this parameter for automatically configured controllers that already exist.

The other parameters in the automatically created controller descriptions are copied from the model controller description (if the model controller associated with the line that the call was received on is varied on), or are system-supplied defaults. An exception to using system-supplied defaults is the ONLINE parameter. It is set to *NO for automatically configured controller descriptions since various systems may be automatically configured (such as personal computers, iSeries systems, and System/36s), and you may not want all systems varied on at initial program load (IPL).

APPC controllers that are automatically created on a LAN have the CTLOWN (control owner) parameter set to *SYS since the system controls that controller description. If an operator wishes to change any parameters in a controller that was created automatically, the CTLOWN parameter needs to be set to *USER. By setting this parameter to *USER, the system does not automatically vary on, change, or delete this controller description. The operator now owns this controller description.