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DIGITAL SNA access server migration guide

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Step 3: Plan Your Migration Strategy

There are many reasons for choosing one migration strategy over another; this guide does not discuss how or why to make that decision. Whatever the strategy, the primary choice is whether the migration is planned to occur gradually and in stages or all at once.

• If the migration is to occur in stages, both the DECnet SNA Gateway and the Access Server Gateway will functionally coexist, at least for some (possibly indefinite) period of time.
• If the migration will occur all at once, the Access Server Gateway will completely replace the DECnet SNA Gateway at a designated date and time.

These two strategies have different planning and implementation consequences, which are discussed in the following two sections.

NOTE

DIGITAL SNA Access Server does not support LU6.2 communication. If you need to maintain LU6.2 functionality, the DECnet SNA Gateway and the Access Server Gateway must coexist.