Data Link Switching Overview
1-3
DLSw runs on all Bay Networks router platforms using local and wide area
network facilities, including
• LAN media, including Ethernet, Token Ring, and Frame Relay
• Other LAN media using SRB formats over Ethernet, FDDI, SMDS, Frame
Relay, and Point-to-Point (PPP) protocols
• SDLC links in point-to-point and multipoint configurations
You can use DLSw services to support connections between SNA and NetBIOS
systems on one type of network (such as Token Ring/802.5) and systems on
different types of networks (such as Frame Relay).
DLSw Single and Dual Switch-to-Switch Services
Bay Networks routers that you configure to support DLSw services can operate in
two modes:
• A DLSw single-switch configuration involving a single local router with two
(or more) interfaces configured for DLSw.
• A DLSw dual switch-to-switch configuration involving paired routers each
connected to an intervening TCP/IP network.
A Bay Networks router simultaneously supports both single- and dual-switch
operation. Figure 1-1 illustrates DLSw single-switch and dual switch-to-switch
networks.
Note:
In this manual, the term LAN refers to all source-route-bridge types of
LANs and transparent-bridge Ethernet/802.3 LANs. Source-route-bridge
LANs include, but are not limited to, Token Ring/802.5, FDDI, Ethernet/802.3,
SMDS, Frame Relay, and other synchronous media protocols. See
Configuring
Bridging Services
for more information on the media that source route
bridging supports.
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