Create a diagram (or table or written description) illustrating the flow of information on your system. This will serve as a reference for the migration team. Include the following information:
Servers, including file, print and application servers:
Sybase name and aliases
Number of users
Routers, brouters, bridges
For example, you can create a diagram like the this high-level view of the Acme Brokerage, a firm with business in several cities and two main computing centers:
You can write a high-level business description in addition to or instead of a diagram.