Avaya Configuring Dial Services Manual de usuario Pagina 269

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Customizing Demand Circuits
308621-14.00 Rev 00
12-41
Scheduling PPP Standby Circuits
There are two scheduling parameters specific to PPP hot standby circuits. You can
configure these using the BCC or Site Manager.
Using Schedules to Manage Standby Circuit Availability
Part of the standby circuit configuration is to schedule the circuit’s availability.
The time of day schedule defines the interval that the standby circuit is available.
It also determines how the router uses the primary and standby circuits when they
are both active.
You can configure several time of day schedules for a circuit in a 24-hour period.
If you do not set up a schedule for the circuit, the circuit’s availability defaults to
24 hours a day.
The Failback Time parameter is part of the time of day schedule. Depending on
how you set this parameter, there may be a delay between the time the standby
circuit is disconnected and the time traffic returns to the primary circuit.
Therefore, it is important to balance the use of the primary and standby circuits to
ensure that data reaches the remote destination.
Be aware that the router monitors the primary circuit during the failback time. If
the primary circuit fails, the router continues to use the standby circuit.
Configuring Multiple Time of Day Schedules
Configuring multiple time of day schedules for a circuit can cause schedule
conflicts. This section provides two examples of when this happens.
If the failback time for the active time of day schedule overlaps the failback time
of the next schedule, the router uses the failback time of the latter schedule. The
router deducts the amount of failback time already elapsed from the latter
schedule (see “Example 1: Failback Times That Overlap
”).
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