Chapter 33: Enterprise Extender: A Better Way to Use IP Networks

Richard J. Tobacco

MOST BUSINESSES RELY ON LEGACY APPLICATIONS RESIDING ON MAINFRAMES. Access to these applications and databases were through networks based on Systems Network Architecture (SNA). Newer application development is often aimed at E-business, and these applications are generally based on TCP/IP networks. Initially, business created and supported these SNA and TCP/IP networks separately. Today’s cost-conscious network managers are seeking ways to consolidate their SNA traffic onto the TCP/IP network. Rewrite of the estimated $3 billion dollar investment in legacy SNA-based applications is clearly not justified.

Many businesses use TN3270e as their method of accessing ...

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