Chiron Technology IRIS 8xx Series Guía de instalación descargar pdf (Pagina 28)

Iris Management Suite

Technical Guide V1.7C 4/11/07

10 Main IP Link Failure Detection and Action

The Polling Engine has a mechanism to detect a failure of the IP link into

which the IRIS diallers poll. Failure is determined to have occurred when no

polls have been received within a timeout period.

The failure is reported to the ARC via the serial link and during the failure

period Poll status changes are not reported to the ARC.

This prevents ‘flooding’ of the ARC with Poll Overdue messages while the IP

link is in failure.

When the IP link is restored, the Polling Engine waits for a ‘Soft Start’ period

to elapse before starting to report Poll status changes. This gives a period

during which all remote IRIS diallers can reconnect and the system can

stabilise.

This mechanism is enabled by setting the Dialler Link Timeout and Soft Start

periods on the Console configuration menu. By default these are set to 0, i.e.

are disabled.

When deciding what settings to use, the following should be considered:

• The Timeout period should be longer than the shortest poll period. This

prevents a false reporting of link failure, even when the system is

handling only a small number of remote diallers.

• The Timeout period should be less than the shortest Poll Overdue

reporting time (i.e. Poll period plus Overdue Margin). This means that

Link Failure will be reported before any Poll Overdue reports. Poll

Overdue reports will then be suspended until the link is restored.

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Chiron Technology IRIS 8xx Series Guía de instalación Pagina 28