


THIS DOCUMENT PROVIDES SOME INFORMATION ON CONFIGURING AN OS/2 COMMUNICATIONS

MANAGER GATEWAY TO BE USED FOR AN OS/2 DATABASE MANAGER DATABASES.




    Note: The heavier the activity on the database the more cycle time will be
    used. Therefore, when the gateway begins to transfer etc., there is little
    or no remaining cycle time, bogging the system down.

    The following settings were recommended by the commo development area:


      Gateway.cfg file (system)

       The following parameter introduces the potential for down time if
       there is a lull in the traffic.

       Example of Problem area:

        - under SDLC DLC Adapter Profile, FREE UNUSED LINK = "yes"

        - under SNA Gateway Profiles, HOST CONNECTION, PERMANENT = "yes"


       To avoid potential down time it is suggested that you set
       FREE UNUSED LINK = "no" in the SDLC environment.



      SNA feature profiles:


        - use LOCAL vs UNIVERSAL addresses.

        - DLC SDLC RU SIZE = 1024
                     COUNT = 7

        - DLC Token Ring RU SIZE = 1024 (to match the above)
                            SEND = 1
                         RECEIVE = 2

          HINT: Check the workstation settings for send and receive and
                always set the GW settings reversed. (eg. If the
                workstation is set as above the GW settings would be:
                SEND = 2, RECEIVE = 1).



      LAN Feature IEEE 802.2:

        - TRANSMIT BUFFER SIZE set to RU + 24 = (1024 +24) = 1024

        - RECEIVE BUFFER SIZE set to 1048

        - MINIMUM RECIEVE BUFFER SIZE set to 10


      Workstation.cfg file (system)

       The DATA TRANSFER BUFFER SIZE override should be set at 2K if
       you are doing file transfer.


      VTAM:

       - Check into the line address = (05,half)
       - suggested settings MAXDATA = 1033
                             MAXOUT = 7
                            PASSLIM = 7

       - Make sure PACING/VPACING at the PU is set to 0. This will prevent
         everything from being passed to the gateway during each operation.





    REF: Guide To Information (toolkit)

         Administrator's Guide for Communications
           (Additional Manuals are also listed in the guide)

         Parameter Tuning Guide (DEMO DISKETTE)

