## CIU prerequisites 

The CIU facility supports LICCC upgrades only. It does not support I/O upgrades. All other capacity that is required for an upgrade must be previously installed. Extra processor drawers or I/O cards cannot be installed as part of an order that is placed through the CIU facility. The sum of CPs, unassigned CPs, ICFs, zIIPs, IFLs, and unassigned IFLs cannot exceed the client (characterized) PU count of the installed processor drawers. The total number of zIIPs can be twice the number of purchased CPs. 

## CIU registration and contract for CIU 

To use the CIU facility, a client must be registered and the system must be set up. After you complete the CIU registration, access to the CIU application is available through the IBM Resource Link website. 

As part of the setup, provide one resource link ID for configuring and placing CIU orders and, if required, a second ID as an approver. The IDs are then set up for access to the CIU support. The CIU facility allows upgrades to be ordered and delivered much faster than through the regular MES process. 

To order and activate the upgrade, log on to the IBM Resource Link website and start the CIU application to upgrade a system for processors or memory. You can request a client order approval to conform to your operational policies. You also can allow the definition of more IDs to be authorized to access the CIU. More IDs can be authorized to enter or approve CIU orders, or only view orders. 

## Permanent upgrades 

Permanent upgrades can be ordered by using the CIU facility. Through the CIU facility, you can generate online permanent upgrade orders to concurrently add processors (CPs, ICFs, zIIPs, IFLs, and SAPs) and memory, or change the model capacity identifier. You can do so up to the limits of the installed processor drawers on a system. 

## Temporary upgrades 

The base model z14 server describes permanent and dormant capacity by using the capacity marker and the number of PU features that are installed on the system. Up to eight temporary offerings can be present. Each offering includes its own policies and controls, and each can be activated or deactivated independently in any sequence and combination. Although multiple offerings can be active at any time, only one On/Off CoD offering can be active at any time if enough resources are available to fulfill the offering specifications. 

Temporary upgrades are represented in the system by a record . All temporary upgrade records are on the SE hard disk drive (HDD). The records can be downloaded from the RSF or installed from portable media. At the time of activation, you can control everything locally. 

