Installation and Upgrade Guides › SiteMinder Upgrade Guide › Upgrading from CA SiteMinder® r12.x › How a Parallel Upgrade Works

How a Parallel Upgrade Works

You do not have to migrate an existing r12.x environment to 12.51. Rather, you can configure a parallel 12.51 environment with an existing deployment.

The following figure illustrates a simple parallel upgrade and details:

• An r12.x environment that continues to protect existing resources.
• An r12.x Administrative UI that is used to manage CA SiteMinder® objects in the r12.x policy store.
• An 12.51 environment that protects new resources.
• An 12.51 Administrative UI that is used to manage CA SiteMinder® objects in the 12.51 policy store.
• A common r12.x key store. The common key store enables single sign-on between both environments.

  Note: Although not illustrated, you can enable single sign–on between both environments using multiple key stores.