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Listeners

 

The group LU 6.2 and TCP/IP listeners listen on an address that is logically connected to the generic address.

For the LU 6.2 listener, the specified LUGROUP is mapped to the VTAM generic resource associated with the queue-sharing group. For an example of setting up this technology, see Table 1 .

For the TCP/IP listener, the specifed port has three mutually exclusive means of being connected to the generic address:

• In the case of a front-end router such as the IBM Network dispatcher (see Network Dispatcher User's Guide, GC31–8496–03), inbound connect requests are forwarded from the router to the members of the queue-sharing group.

• In the case of TCP/IP WLM/DNS, each listener registers as being part of the WLM group. This is a registration type model, similar to the VTAM generic resource for LU 6.2. For an example of setting up this technology, see Using WLM/DNS. WLM/DNS only maps hostname and does not map port numbers. This means that all the group listeners in a queue-sharing group must use the same port number. Use the WebSphere MQ command (MQSC) as shown in the following examples:

  • On queue manager QM1:

    START LSTR PORT(2424) INDISP(GROUP) +
    IPADDR(QM1.MACH.IBM.COM)

  • On queue manager QM2:

    START LSTR PORT(2424) INDISP(GROUP) +
    IPADDR(QM2.MACH.IBM.COM)

• In the case of TCP/IP's Sysplex Distributor, each listener that is running and is listening on a particular address that is set up as a Distributed DVIPA will be allocated a proportion of the incoming requests. For an example of setting up this technology, see Using Sysplex Distributor

 

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ic15370_

 

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