Installation and Configuration Supplement

Configuring Communications Server for OS/2

The following example assumes:

IBM Communications Server for OS/2 V5 is installed
SPMNAME is the local LU name
SPM_NAME is set to SPMNAME.

These requirements must be met:

The SPM_NAME Database Manager Configuration parameter must specify the local LU to be used by SPM. The SPM_NAME cannot represent the Control Point LU. There is no need to configure the LU 6.2 profile. DB2 will dynamically create or modify the necessary profiles. Ensure the LU represented by the SPM_NAME parameter is only used by DB2.
SPM_NAME can be set using the following command:
```
   update database manager configuration using spm_name SPMNAME
```
If your DB2 Universal Database SPM workstation will be used as a server accepting DB2 Universal Database client connections through APPC, you will need to ensure that you configure the database manager configuration parameter tpname with an appropriate value. For example:
```
db2 update dbm cfg using tpname NYSERVER
```

Note:

If all of the following apply to your environment:

You are using the SPM workstation to connect to host or AS/400 database servers.
You are using the SPM workstation to accept connections from host or AS/400 database clients.
You have DB2 Universal Database clients accessing the SPM workstation through APPC.

then the DB2 Universal Database clients and the host or AS/400 database clients must:

Use the same transaction program name to connect to the SPM workstation.
Use the SPM_NAME LU as their partner logical unit.

Communications Server Operational Considerations

Communications Server for OS/2 requires that syncpoint LUs be registered by the SPM before they can be used. Thus DB2 must be started explicitly beforehand so that the SPM can register the syncpoint LU. Otherwise you may encounter the following message:

 SQL0859N Access to the Transaction Manager Database failed with
 SQLCODE "-1032".  SQLSTATE=08502.

To execute a one-phase commit successfully when DB2 is not started, the default LU should specify a non-SPM LU. You can use the APPCLLU environment variable to specify an LU name that is not the same as the value in SPM_NAME. Otherwise you may encounter the following message:

SQL30081N  A communication error has been detected. Communication protocol
being used: "APPC". Communication API being used: "CPI-C". Location where
the error was detected: "". Communication function detecting the error:
"xcstp". Protocol specific error codes: "20", "*", "*".  SQLSTATE=08001

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