A migration is the process of upgrading individual SiteMinder components until your environment is operating at r12.5. Upgrading individual components consists of one or more steps during which you:
You upgrade individual components over an extended period to maintain system availability. A key to maintaining system availability is the order in which you upgrade components. During a migration, specific components that have been upgraded can continue to communicate with prior versions. This type of communication is known as mixed–mode support.
The following diagram illustrates the concept of a migration. For more information about migrating from r6.x or r12.x, see the respective chapter:
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