Avaya Configuring Dial Services Bedienungsanleitung PDF herunterladen (Seite 51)

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Dial Services Overview

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Figure 1-9. Example of Backup Pools, Lines, and Circuits

You can assign the same backup pool ID to more than one primary circuit. If you

want only one backup line dedicated to a primary circuit, then you should

configure only one line in a pool and assign that pool exclusively to that circuit.

Configuration of the Backup Circuit

The configuration of the backup circuit depends on the protocol for the primary

circuit. If Standard or PPP is running over the primary circuit, the backup circuit

inherits the primary’s network layer address configuration. Unlike the network

layer address configuration, the data link layer configuration can be unique.

If frame relay is running over the primary circuit, the backup circuit can inherit the

primary’s configuration or it can use its own configuration. When the frame relay

primary and backup circuit use the same configuration, it is called the shared

configuration. The shared configuration allows a backup circuit to use the same

network layer address as the primary circuit. The backup circuit’s data link layer

configuration (PVCs, DLCIs, and filters) can be the same or different from the

primary circuit.

DS0029A

128.32.17.0

128.32.18.0

Circuit 1 - 128.32.17.1

(the local interface to Phoenix)

Circuit 2 - 128.32.18.1

(the local interface to San Francisco)

Configuration of the San Diego router:

San Diego

Phoenix

San Francisco

128.32.17.2

128.32.18.2

Backup pool 1:

Backup line 1

ISDN

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 551 552

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