To obtain system installation parameters during startup, DB2 reads the BSDS (Bootstrap Data Set). One of the records stored in the BSDS is the DDF record. This record contains information used by DDF to connect to VTAM.
If you are installing DB2, use the DDF installation panel DSNTIPR to provide:
DDF location name
DDF LUNAME
Password used when connecting DB2 to VTAM, if a password is required
If DB2 is already installed, use the change log inventory utility (DSNJU003) to update this information in BSDS.
Record the DDF location name. You will use it for the Database Server Name during data source configuration on the desktop. You can also determine the DDF location name from the syslog. Look for a DB2 message DSNL004I (starting DDF) that contains the location name. Also record the DDF LUNAME, which you will need for SNA configuration.
This is an example of a BSDS updated with a location name of STARDB, LU name of DSNV510, and a password of STARPASS.
//*
//DSNTLOG EXEC PGM=DSNJU003,COND=(4,LT)
//STEPLIB DD DISP=SHR,DSN=DSN510.SDSNLOAD
//SYSUT1 DD DISP=OLD,DSN=DSN5CAT.BSDS01
//SYSUT2 DD DISP=OLD,DSN=DSN5CAT.BSDS02
//SYSPRINT DD SYSOUT=*
//SYSIN DD *
DDF LOCATION=STARDB,LUNAME=DSNV510,
PASSWORD=STARPASS,RESPORT=5020,PORT=446
//*
If your system does not require a password to connect DB2 to VTAM, leave the PASSWORD field blank.
The PORT and RESPORT parameters are required for TCP/IP access. If you are using SNA only, you can omit them.