Establishing a TCP connection into a queue-sharing group

Edit the channel initiator initialization parameters. Sample JCL to do this is in thlqual.SCSQPROC(CSQ4XPRM). You must add the name of the TCP address space to the TCPNAME= parameter.

Using WLM/DNS

Edit the channel initiator initialization parameters. You must set DNSWLM=YES; optionally you can add the name of the group name to be used as a hostname to the DNSGROUP= parameter. If you leave the name blank the queue-sharing group name is used.

Figure 89. Channel Initiator initialization parameters

//SYSIN    DD *
        CSQ6CHIP ADAPS=8,                 X
              ACTCHL=200,                 X
              ADOPTMCA=NO,                X
              ADOPTCHK=ALL,               X
              CURRCHL=200,                X
              DISPS=5,                    X
              DNSGROUP=MYGROUP,           X
              DNSWLM=YES,                 X
              LSTRTMR=60,                 X
              LUGROUP=,                   X
              LUNAME=MVSLU,               X
              LU62ARM=,                   X
              LU62CHL=200,                X
              OPORTMIN=0,                 X
              OPORTMAX=0,                 X
              TCPCHL=200,                 X
              TCPKEEP=NO,                 X
              TCPNAME=TCPIP,              X
              TCPTYPE=OESOCKET,           X
              TRAXSTR=YES,                X
              TRAXTBL=2,                  X
              SERVICE=0
          END
/*

WLM/DNS does not offer any support for mapping one incoming port number to a different outgoing port number. This means that each channel initiator must use a different hostname, by one of the following methods:

• Run each channel initiator on a different MVS image
• Run each channel initiator with a different TCP stack on the same MVS image.
• Have multiple Virtual IP Addresses (VIPAs) on one TCP stack.

See z/OS Communications server IP User's Guide, SC31-8780 for more information on VIPA.

See "Redbook: TCP/IP in a sysplex", SG24-5235 for more information on WLM/DNS.

What next?

The TCP connection is now established. You are ready to complete the configuration. Go to WebSphere MQ for z/OS shared channel configuration.