CA-L-Serv › Use the Communications Server › Use of Multiple Communication Services and Protocols

Use of Multiple Communication Services and Protocols

You can use multiple communication services and protocols on the same system. But you can use only one protocol - XCF, VTAM LU 6.2, or VTAM LU 0 - for communication between any two systems at any one time.

A Typical Implementation

The use of multiple communication services and protocols is illustrated below. The z/OS systems S01, S02, and S03 are in a sysplex, while z/OS system S04 is not. XCF is used for communication among S01, S02, and S03, while VTAM LU 0 is used for communication between S03 and S04.

The communication setup shown above allows the following communication between CA-L-Serv applications:

• A CA-L-Serv application running on system S01, S02, or S03 can communicate with any CA-L-Serv application running on system S01, S02, and S03.
• A CA-L-Serv application running on system S03 can communicate with a CA-L-Serv application running on system S04.

Note: A CA-L-Serv application running on S01 or S02 cannot communicate with a CA-L-Serv application running on S04. That is, S03 does not act as a gateway between S01/S02 and S04.