Configure a CPCSCOPE dynamic VIPA for each CPC for use by a group of DataPower target applications

A CPCSCOPE DVIPA is specific to the CPC on which it is defined, and cannot be moved to or taken over by another TCP/IP stack that is in a different CPC.

Code a VIPADEFINE or VIPABACKUP statement within the VIPADYNAMIC block of the TCP/IP profile, and include the CPCSCOPE parameter to indicate that the DVIPA specified by an IP address on this statement is specific to the CPC on which it is defined.

Requirements:

The CPCSCOPE DVIPA must be in the same subnet as the DataPower® appliances that are using that site.
The address and subnet mask combination must define a unique subnet for each CPC.
The CPCSCOPE DVIPA and the tier 2 DVIPA must be on stacks that are in the same CPC.

Using the CPCSCOPE subnet mask, the tier 1 distributor determines the DataPower appliances that are in its subnet. The distributor associates these DataPower appliances with a tier 2 distributor in the CPC of the stack where the CPCSCOPE DVIPA was defined. When determining the composite weights for these DataPower appliances, the distributor uses the tier 2 combined CPC weights received from the tier 2 distributor on that CPC.

The following example shows the definition on an LPAR on site 1:

VIPADEFINE CPCSCOPE 255.255.255.0 201.81.10.7

As shown in Figure 1, the tier 1 distributor uses the CPCSCOPE subnet mask (201.81.10.0/24) to determine that DATAP1 and DATAP2 are in that subnet. The distributor associates these DataPower appliances with the tier 2 distributor for address 10.81.1.1, because it is defined on a stack in CPC1 and this CPCSCOPE DVIPA is also defined on a stack in CPC1. As the distributor receives a tier 2 weight for GROUP1 (combined CPC weights for CICS1 and CICS2) from this distributor, it finds the matching tier 1 GROUP1 DataPower targets and uses this weight when determining the composite weights for DATAP1 and DATAP2.

LPAR3 in CPC2 contains the tier 2 distributor for that site, so a CPCSCOPE DVIPA for CPC2 is defined on one of the LPARs in CPC2:

VIPADEFINE CPCSCOPE 255.255.255.240 201.81.20.7

The VIPABACKUP statements for the tier 2 DVIPA and CPCSCOPE DVIPA defined in CPC1 are defined in one or more other stacks in that CPC:

VIPABACKUP TIER2 CPCSCOPE 201.81.1.1 
VIPABACKUP CPCSCOPE 255.255.255.240 201.81.10.7

Similarly, the VIPABACKUP statements for the tier 2 DVIPA and CPCSCOPE DVIPA defined in CPC2 are defined in one or more other stacks in that CPC:

VIPABACKUP TIER2 CPCSCOPE 201.81.2.2 
VIPABACKUP CPCSCOPE 255.255.255.240 201.81.20.7