Avaya Configuring SMDS Manual de usuario descargar pdf (Pagina 15)

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1-1

Chapter 1

SMDS Overview

Switched Multimegabit Data Service (SMDS) is a public, high-speed,

packet-switched network service that enables you to connect local area networks

(LANs) across wide area networks (WANs). SMDS technology combines cell

relay technology and IEEE Standard 802.6, the link control protocol standard that

controls cell transmission. To send information across the network, SMDS divides

data into ﬁxed 53-byte cells. The use of cell technology makes SMDS well suited

for trafﬁc that consumes high bandwidth for short periods of time.

igure 1-1 illustrates an SMDS network. In this illustration, LAN 1 communicates

to LANs 2 and 3 through a router connected to an SMDS Digital Service

Unit/Channel Service Unit (DSU/CSU). The DSU/CSU changes the frame-based

data from the router into cells that can then be sent across the SMDS network.

Figure 1-1. SMDS Sample Network

Router

DSU/

CSU

Router

DSU/

CSU

LAN 1

LAN 3

SNI

SMDS

network

SMDS

switch

LAN 2

SNI

Router

DSU/

CSU

SMS0001A

SMDS

switch

SMDS

switch

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Avaya Configuring SMDS Manual de usuario Pagina 15