DLSw

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DLSw

(Data Link SWitching) An IBM method for integrating and forwarding SNA and LAN traffic over wide area networks (WANs) by encapsulating the data in TCP/IP packets. DLSw supports the SDLC (SNA) and LLC2 (Token Ring) data link protocols and is generally employed in routers. Multiprotocol over frame relay (MPOFR) is a later technology designed to move SNA and LAN traffic over frame relay. See MPOFR.
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The Tolly Group benchmark examined the performance of SDLC-connected end-user devices linked to a host via Data Link Switching and measured the impact of competing LAN traffic on SDLC throughput.
Proteon will implement BAN as an enhancement to its existing Data Link Switching (DLSw), Frame Relay and bridging software implementations.
A major issue for customers who utilize Data Link Switching (DLSw) to build tunneled networks is the ability to prioritize mission-critical traffic, generally from SNA applications supporting such real-time transaction processing systems as Point of Sale and Automatic Teller networks.
The extended joint development agreement provides for additional hardware configurations, future software extensions in areas such as Data Link Switching (DLSw) and network management, and continued interoperability testing at IBM's Research Triangle Park facility.
LLSw is a RFC1490-compliant level 2 frame switching technique which provides the benefits of Data Link Switching (DLSw)-SDLC-to-LLC2 conversion, LLC2 WAN transport, non-disruptive alternate routing, and local serial SDLC and LAN LLC2 termination -- but without DLSw's bandwidth robbing overhead, lack of determinism, and operational complexity.
The routers also support every important LAN and WAN protocol, including TCP/IP, DECnet Phase IV, IPX, VINES, AppleTalk, XNS, Transparent Bridge, Source Route Bridge, Data Link Switching, and other extensive features.
The popularity of Data Link Switching is evidence that it meets an important customer need," said Louise Herndon Wells, director of IBM Internetworking at Internetwork Technology Institute and chair of the Data Link Switching Related Interest Group.
Nasdaq: PTON), reinforcing its leadership role in SNA internetworking, today announced it has dramatically outpaced the competition in a Data Link Switching (DLSw) industry benchmark performance test.
While other participants used bridging or data link switching to transport SNA over the Frame Relay network, OmniLinx was the only product to utilize RFC 1490 for this benchmark testing.
Data Link Switching (DLSw), Proteon's Intelligent End Node Routing,
Besides offering support for Data Link Switching (DLSw) and APPN, Cabletron's OpenSNA strategy offers the ability to merger environments using the company's SecureFast Switching and Virtual Network Services (VNS) technology.