Networking

z/OS® Communications Server generic resources

A CICS system can register as a Communications Server generic resource. It can then be known either by its unique APPLID or by the generic resource name, which is shared by a number of CICS regions, all of which are registered to the same generic resource.

TCP/IP Port sharing

TCP/IP port sharing enables multiple CICS regions to listen to the same port from the same IP stack. Requests addressing this IP stack's port are distributed equally between the active regions, based on the number and health of sockets in each CICS region.

DVIPA and Sysplex Distributor

DVIPA can be used if the CICS region runs in a separate LPAR or connects to separate IP stacks in the same LPAR.

Sysplex distributor enables an IP workload to be distributed to multiple server instances within the sysplex but without requiring changes to clients or networking hardware, and without delays in connection setup.

Sysplex distributor can be used with port sharing to provide a combined high availability approach across CICS regions in the same LPAR and across a sysplex in different LPARs.