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DLSw (Data Link Switching)
Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
DLSw is a standard for encapsulating and tunneling IBM SNA (Systems Network Architecture) and NetBIOS traffic across IP (Internet Protocol) networks. The protocol is the result of a need to integrate SNA and non-SNA networks (i.e., Token Ring and Ethernet LANs), rather than deploy two separate networks or use a variety of proprietary schemes to tunnel SNA data over non-SNA networks.
As LANs became more popular throughout the enterprise, IBM and other vendors saw the benefits of using these networks for interconnecting SNA devices and as a way to allow network-connected PC users to access SNA mainframes. APPN (Advanced Peer-to-Peer Networking) was IBM's solution for building router-connected internetworks, but TCP/IP has since become more popular. DLSw was developed to meet the needs of sending SNA traffic over IP networks.
This topic continues in "The Encyclopedia of Networking and Telecommunications."
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.