Specifying the LU names of requesters

As part of configuring a data sharing group for group-generic access, you must specify the LU names of requesters.

About this task

Installation job DSNTIJSG inserts a default row into the SYSIBM.LUNAMES table unless the installation process has been altered to remove this step. The default row enables access by any requester that is not defined by a row in the table. The following table shows the default row in the SYSIBM.LUNAMES table of a Db2 server.

Table 1. An example of the default row in the SYSIBM.LUNAMES table of a Db2 server. This example shows only those columns that are accessed when Db2 is a server.
LUNAME SYSMODENAME SECURITY_IN GENERIC
(8 blanks) 'A' 'N'  

You can change the values in the default row before you start DDF.

Individual requesters include Db2 for z/OS® and the members of requesting data sharing groups.

Procedure

To specify LU names of requesters:

  1. Use the INSERT statement to add the LU names of requesters to the LUNAME column of the SYSIBM.LUNAMES table of the server.
  2. To limit the number of conversations that a Db2 server can accept from a DRDA SNA LU partner, change or add the row for the partner LU in the SYSIBM.LUNAMES table to specify an SNA MODENAME. You must also add or update a row in the SYSIBM.LUMODES table that contains the SNA MODENAME.
  3. To block inbound already-verified conversations from another partner LU name, change or add a row for the LU name to specify 'V' for SECURITY_IN.
  4. To perform inbound userid translation from a partner LU name, update or add a row in the SYSIBM.LUNAMES table to specify 'I' or 'B' in the USERNAMES column. You must also update entries in the SYSIBM.USERNAMES table.

Example

Begin general-use programming interface information.

Assume that the LU names of the members of one requesting data sharing group are LUMEM1, LUMEM2, and LUMEM3, and that the LU names of the members of another requesting data sharing group are LUMEMA and LUMEMB. The following statements insert the LU names of requesters into the SYSIBM.LUNAMES table.

INSERT INTO SYSIBM.LUNAMES (LUNAME)
   VALUES ('LUMEM1');
INSERT INTO SYSIBM.LUNAMES (LUNAME)
   VALUES ('LUMEM2');
INSERT INTO SYSIBM.LUNAMES (LUNAME)
   VALUES ('LUMEM3');
INSERT INTO SYSIBM.LUNAMES (LUNAME)
   VALUES ('LUMEMA');
INSERT INTO SYSIBM.LUNAMES (LUNAME)
   VALUES ('LUMEMB');

End general-use programming interface information.

An excerpt of the server's SYSIBM.LUNAMES table would look similar to the following table.

Table 2. LU names of requesters in a SYSIBM.LUNAMES table of a Db2 server. Not all columns are shown.
LUNAME SYSMODENAME SECURITY_IN USERNAMES GENERIC
LUMEM1        
LUMEM2        
LUMEM3        
LUMEMA        
LUMEMB