Network Requirements

As in any large corporation, some paranoia surrounds the performance and fault tolerance of the network. Alpha.com has some very strict requirements about design: Managers want complete Layer 2 redundancy, full load-sharing capability, unfailing optimal routing, faster convergence, and failure recovery without major impact.

The company uses a large IBM SNA network, and has specific time limits for network convergence. The customer wants the routing protocol to converge so that none of its LLC2 SNA sessions is terminated.

As in any large corporation, Alpha.com does not assign all of its employees to the same department or locate them in the same building; employees are dispersed around the campus, or even in different cities around the world. Alpha.com wants to build a 5000-node network that will scale today and continue to be successful for years to come.

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