Migrate multiple domains that perform different functions in your environment.
Development and test domains must be migrated before production domains. Migrating the development domain first minimizes potential downtime associated with any migration activity. In addition, development domains typically require access to new broker functions before test and production domains. When you develop message flows that make use of new functions, you must migrate the test and production domains before you deploy the new message flows to them.
Because each Message Broker Toolkit can administer multiple domains, be careful when migrating instances of the Message Broker Toolkit not to affect any domains that have not been migrated yet.
Message Broker ToolkitVersion 6.1 can administer Version 6.0 domains; similarly, Message Broker ToolkitVersion 6.0 can administer Version 6.1 domains
Before you start to perform migration, back up your resources.