Multitech FR111A Guía de usuario descargar pdf (Pagina 29)

Chapter 4 - MultiFRAD Software

FR111A

Frame Relay Setup

The Frame Relay Setup dialog box displays the CIR Measurement Interval in milliseconds, the

Management Type, and details of that management type. The MultiFRAD can detect the DLCI and

the Management Type at power-up if you are connected to an active frame relay service. If you

change any frame relay parameters, it is important that the new parameters agree with the way your

frame relay service is provisioned.

In this dialog box, you can change the Management Type by choosing one of the three options and

then the detail parameters for that option are displayed to the right of the Management Type. For

example, in the above dialog box, Annex D is the chosen management type with the Full Status

Enquiry Interval [N391] set to 6 down through Polling Verification Timer [T392] set to 15.

Usually, you will have no need to change the management type because the MultiFRAD will

automatically detect the network’s management type at power-up, or when the network becomes

active. This auto-detection feature takes about 1 to 2 minutes to detect the management type and list

the DLCI.

Occasionally the Management Type parameters can be changed to correct a problem. In these

cases, making the following changes could alleviate the problem:

1. Change the Link Integrity Verification Timer. This feature sets how often the MultiFRAD

verifies that the link is good. Changing the setting from the default value of 10 seconds, to a

lower value, i.e., 5 seconds, will increase the frequency of those verifications.

2. Change the Full Status Enquiry Interval to affect how often DCLI Status is updated. This

parameter defines how often the MultiFRAD will send a request for DLCI status information along

with the Link Integrity Verification request. The default value is to include such a request every

sixth time the link integrity is checked. A value less than every sixth request will allow faster

detection of active/inactive DLCIs, but will also produce a slight increase in management

overhead.

3. Change the Monitored Events Count and the Error Threshold to affect the MultiFRAD’s

sensitivity to errors on the link. Every management frame received by the MultiFRAD is

considered an event, and if the link integrity sequence numbers are wrong, for example, it is

considered an “errored” event. With the default settings (Error Threshold is 3 and Monitored

Events Count is 4), and 3 out of 4 events are “errored”, then the link is considered to be bad,

and the FRAD stops sending on the DLCI and restarts the initial procedures to activate the link.

4. Change the CIR Measurement Interval to change the time frame in which the FRAD calculates

throughput for the DLCI. By default, every 1000 milliseconds (1 second), the MultiFRAD

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Multitech FR111A Guía de usuario Pagina 29