Avaya Configuring Data Compression Services Manuel d'utilisateur télécharger pdf (Page 33)

Implementation Notes

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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.

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, see Conﬁguring Line

Services or Conﬁguring Customer Access (BNX Software).

Multilink

The multilink feature of PPP provides capabilities beyond those of multiline

circuits. Multilink consists of a bundle of lines between two peers, consisting of

up to four links. Multilink has the ability to

• Distribute trafﬁc across the lines in the bundle in amounts roughly

proportional to the effective bandwidth of each link.

• Use lines that have different speeds, proportionally distributing trafﬁc over

those lines

• Balance trafﬁc load and restore packet sequence

• Use switched lines (such as ISDN-B channels) as well as leased lines

• Monitor trafﬁc volume

Bandwidth-on-Demand

Bandwidth-on-demand allows a secondary, dial-up line to augment a primary,

leased line when the primary line experiences congestion. Congestion occurs

when trafﬁc volume exceeds line capacity. When congestion abates, the secondary

line becomes inactive.

Dial-on-Demand

Dial-on-demand 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.

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Avaya Configuring Data Compression Services Manuel d'utilisateur Page 33