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Data Compression Overview

117352-A Rev. A 2-9

The backup circuit can inherit the primary’s conﬁguration, or it can use its own.

When the Frame Relay primary and backup use the same conﬁguration, they have

a shared conﬁguration. The backup circuit uses the same network-layer address as

the primary circuit. The data-link layer conﬁguration, that is, the backup PVCs,

DLCIs, and ﬁlters can be the same or different from the primary.

If the backup uses a unique conﬁguration, it is a secondary conﬁguration. A

secondary conﬁguration uses a different network-layer address, PVCs, and ﬁlters

from the primary.

To use data compression with dial backup for Frame Relay, you must conﬁgure

compression on the backup circuit, because with either a shared or secondary

conﬁguration, the backup PVCs can use different conﬁgurations from the primary.

For further information on Bay Networks dial services, refer to Conﬁguring Dial

Services.

Frame Relay Multiline

Multiline is a feature that enables you to conﬁgure a single circuit that consists of

one or more WAN data paths. A data path is a logical point-to-point channel; it

can be a permanent or dial-up physical line, or it can be a virtual circuit

connection. Multiline provides both increased fault tolerance and greater

bandwidth between two sites.

For more information about Bay Networks multiline, refer to Conﬁguring WAN

Line Services.

PPP Services

You can use software or hardware data compression on all PPP circuits, including

multiline and multilink, bandwidth-on-demand, dial-on-demand, and dial backup

lines. When you use compression on a bandwidth-on-demand, dial-on-demand, or

dial backup circuit, WCP automatically conﬁgures or deletes compression as lines

are added to or removed from the circuit.

PPP Multiline

Multiline is a feature that enables you to conﬁgure a single circuit that consists of

one or more WAN data paths. A data path is a logical point-to-point channel; it

can be a permanent or dial-up physical line, or it can be a virtual circuit

connection. Multiline provides both increased fault tolerance and greater

bandwidth between two sites.

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Avaya Configuring Data Compression Services Manuale Utente Pagina 31