
Configuring DLSw Services
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-- Fixed information, such as an organization’s software version
-- Customized information, where one router transfers the information to
another router
-- Negotiation, where routers negotiate the use of proprietary functions (and
only if both routers support the functions under negotiation)
• Rate-based pacing, a new standard for flow control between routers. Flow
control allows a DLSw router to inform another router to slow down or stop
sending data when the receiving buffer(s) fill up. Rate-based flow control uses
a windowing mechanism that allows the routers to send more or fewer
packets, based on the state of the last receive window. If the router
successfully receives the last transmission, it informs the sending router to
continue to send more packets. Flow control is essential for successful
delivery of SNA and NetBIOS data.
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.
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