Avaya Configuring Dial Services Manual do Utilizador descarregar pdf (Página 52)

Configuring Dial Services

1-24

117353-B Rev. 00

Initially, the router brings up one secondary line to alleviate congestion. If the

congestion persists, the router activates a second and then a third line until the

congestion subsides. Each new line the router activates becomes part of a

multilink bundle. The router then balances traffic over the bundle. After the traffic

decreases, the router deactivates the secondary lines, one at a time.

A router on one side of the connection monitors byte counts for the data it sends

and receives. This router is called the monitor router. The monitor router uses

these byte counts, along with bandwidth-on-demand monitor parameters, to

determine when to activate additional lines for more bandwidth. The router then

uses all the available lines in the bundle to send data across the network.

The router on the other side of the connection is the non-monitor router. The

non-monitor router cannot activate additional dial-up lines. If you configure BAP

for ISDN connections, the non-monitor router has a more active role in

determining how additional lines are activated for more bandwidth. For more

information about BAP, see Chapter 8, “Bandwidth-on-Demand Implementation

Notes.”

Bandwidth-on-Demand Lines and Pools

A bandwidth-on-demand pool is a collection of dial-up lines that a congested

leased line, demand line, or multilink bundle can use. Each bandwidth-on-demand

pool is identified by a bandwidth-on-demand pool ID.

In a bandwidth-on-demand pool, you can combine asynchronous, synchronous, or

ISDN lines in a single pool. Lines in a backup pool can connect to a modem,

directly to a PSTN (using the ARN with the V.34 Modem Adapter Module), or

directly to an ISDN network (using a router with integral ISDN capability).

You can combine asynchronous, synchronous, and ISDN interfaces in a single

pool. The synchronous interfaces can use Raise DTR or V.25bis signaling for

modem connections. The asynchronous interfaces can use Raise DTR, V.25bis, or

Hayes signaling for modem connections. Hayes signaling requires that you use AT

modem commands to send dialing instructions to the modem. The ISDN lines use

ISDN signaling for network connections.

Lines in a bandwidth pool may operate at different speeds. PPP multilink, the

protocol that the router uses for bandwidth-on-demand circuits, can manage lines

of varying speed, distribute traffic across lines, and monitor traffic. The router

may also use BAP to manage bandwidth allocation.

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Avaya Configuring Dial Services Manual do Utilizador Página 52