Avaya Configuring Frame Relay Services Bedienungsanleitung PDF herunterladen (Seite 25)

114058 Rev. A 2-1

Chapter 2

Frame Relay Overview

Frame Relay is a high-speed, packet-switching WAN protocol that connects

geographically dispersed LANs. Frame Relay is usually offered by a public

network provider; however, private organizations can acquire and manage their

own Frame Relay networks as well.

Frame Relay is a connection-oriented protocol, which means that it relies on

existing end-to-end paths between devices connected across the network. It

implements these connections using permanent virtual circuits (PVCs).

A PVC is a logical path the network provides to connect two devices. This path

between the source and destination point is a dedicated connection, so the PVC is

always available to the connected devices. Since many PVCs can coexist, devices

can share the bandwidth of the transmission line.

Figure 2-1 illustrates a Frame Relay network.

Figure 2-1. Frame Relay Network

Router

Frame Relay

Network

Router

VC=virtual circuit

Switch

Frame Relay defines the interface between

the DTE (router) and the DCE (switch)

Switch

FR0001A

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Avaya Configuring Frame Relay Services Bedienungsanleitung Seite 25