z/OS: WLM/DNS no longer supported

z/OS Communications Server

Support for WLM/DNS as an IP address routing mechanism is no longer available in the z/OS Communications Server from z/OS V1R11 onwards.

Queue manager attributes no longer used

The following queue manager attributes no longer cause a WLM/DNS registration to be attempted by an INDISP(GROUP) TCP listener.

DNSGROUP

The name of the group that the TCP listener handling inbound transmissions for the queue-sharing group joined when using Workload Manager for Dynamic Domain Name Services support (WLM/DNS).

If this name was blank, the queue-sharing group name was used.

The PCF parameter identifier for this attribute is MQCA_DNS_GROUP

DNSWLM

Whether the TCP listener that handles inbound transmissions for the queue-sharing group registers with WLM/DNS:

NO

The listener is not to register with Workload Manager.

This is the queue manager's initial default value and the only value supported in IBM MQ for z/OS Version 8.0.

YES

The listener is to register with Workload Manager.

This value is not supported in IBM MQ for z/OS Version 8.0 and if already set will result in message CSQX093I being issued by the CHINIT.

The PCF parameter identifier for this attribute is MQIA_DNS_WLM

Alternate support

Sysplex Distributor can be used as an alternate feature instead of WLM/DNS for generic IP address routing. For more information, see Establishing a TCP connection Using Sysplex Distributor.