TOS Classic to Aurora Upgrade Paths

What releases can I upgrade From/To?

• To upgrade from TOS Classic to TOS, you must be on TOS Classic R21-3 and must upgrade to TOS R23-1 PHF3.2.0. See Classic to Aurora - Start Here.

• If you are on an earlier release of TOS Classic, you must first upgrade to TOS Classic R21-3. See TOS Classic Lifecycle

• After you upgrade to TOS R23-1 PHF3.2.0, you can upgrade to a later release of TOS. See TOS Release History and Upgrade Paths