Avaya Configuring Data Compression Services Instrukcja Użytkownika Pobierz pdf (Strona 47)

Data Compression Overview

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PPP Dial-on-Demand

Dial-on-demand service enables you to establish a circuit only when you want to

transmit and receive data, as opposed to having a leased line, which is always

available. By using a circuit on a demand basis, you can significantly reduce your

line costs.

PPP Dial Backup

PPP also allows you to configure dial backup service. If a primary PPP line fails

and you enabled dial backup, the router automatically establishes a backup line.

You cannot enable any protocols, including compression, on a backup circuit,

because a backup circuit inherits its protocols from the primary circuit. If the

primary circuit uses compression, then the backup circuit does also.

For more information about Bay Networks dial services, see Configuring Dial

Services.

Frame Relay Services

You can use software (WCP only) or hardware data compression with frame relay.

You can use compression with some virtual circuits (VCs), and not with others, as

you choose, both for regular frame relay VCs, and for those you configure in

hybrid mode. You can also use compression with dial-on-demand and dial backup

services.

You must enable compression on both sides of a frame relay link. If you enable

data compression on only one side of the link, data transmission occurs, but in

uncompressed form.

Frame Relay Hybrid Access

Hybrid access enables you to combine bridging and routing over a single frame

relay interface.

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Avaya Configuring Data Compression Services Instrukcja Użytkownika Strona 47