Avaya Configuring Frame Relay Services Instrukcja Użytkownika Pobierz pdf (Strona 43)

Frame Relay Overview

117376-A Rev. A 2-23

Multiline

Frame relay provides a link redundancy feature called multiline. Multiline is a

Bay Networks proprietary implementation that lets you group two or more

physical lines that back each other up in case of a failure. This ensures that

information arrives at its destination on the network. In addition, if both lines are

up, the router uses both lines simultaneously. Two or more physical lines must be

available for a multiline conﬁguration. F

igure 2-11 illustrates a multiline

conﬁguration.

Figure 2-11. Multiline Network

In this example, when the router receives trafﬁc destined for the network, it

alternates or randomizes (depending on how you conﬁgure it) between line A and

line B to transmit the data. The router uses both lines simultaneously to balance

the trafﬁc between each path. If one of these lines goes down, the router uses the

remaining line.

You can multiline up to four service records together. Each service record must be

on a different physical line on the router. We also recommend that each line be on

a different slot to provide fault tolerance.

You must also match DLCIs in each service record of the multiline. Matching

DLCIs ensures that a backup exists for each PVC.

Line A

Line B

Router

DLCI 100

Router

DLCI 200

Frame

relay

network

FR0009A

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 93 94

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Avaya Configuring Frame Relay Services Instrukcja Użytkownika Strona 43