How to alarm on a model in a Spectrum Fault Domain when contact is lost to all models in the Spectrum Fault Domain

Products

• CA Spectrum
• DX NetOps

Issue/Introduction

How to alarm on a model in a Spectrum Fault Domain when contact is lost to all models in the Spectrum Fault Domain

When an alarm shows on the Fault Isolation model, how can that be changed to alarm on a specific device model?  Most users wish to see the Unresolved Fault alarm asserted on a model in the Fault Domain instead of on the Fault Isolation model.

Environment

DX NetOps Spectrum

Cause

This is functioning as designed.

Resolution

This can be done by doing the following:

1. Choose a model in the Fault Domain where you wish the Unresolved Fault alarm to be asserted and set the Criticality attribute (0x1290c) to a value that is higher than any other model in the same Fault Domain. The default value for the Criticality attribute is "1".  Make this value 10 or 100.  You need to do this on ALL devices in different fault domains if you want the alarms specifically generated on certain models as the default Criticality in Spectrum is 1 (if you do not do this, Spectrum will read the list of model handles to see which one is the lowest and will generate the alarm on that model).

2. Set the Unresolved Fault Alarm Disposition value to "Device in Fault Domain". This can be done by doing the following:
     a. Find and select the VNM mode
     b. Click on the Information tab in the Component Detail panel
     c. Find and expand the Fault Isolation folder
     d. Set Unresolved Fault Alarm Disposition to "Device in Fault Domain"

The next time SPECTRUM loses connection to all the models in a Fault Domain, the Unresolved Fault alarm will be asserted on the model with the highest Device Criticality in the Fault Domain. If two or more models have the same Device Criticality, SPECTRUM will generate the Unresolved Fault alarm on the model with the lowest model handle.

 

Additional Information

Fault Domain

A Fault Domain is defined as "A group of two or more models all associated (connected) with each other contiguously in the Universe Topology hierarchy."

During the modeling of the network in SPECTRUM, a user may find they have several Fault Domains when the modeling process is complete. By default, when SPECTRUM loses contact with all models in a Fault Domain, an Unresolved Fault alarm is asserted on the Fault Isolation model stating SPECTRUM has lost contact with all the models in the Fault Domain and cannot determine the root cause. The event will list all the models affected. 

Please reference the "Fault Isolation Settings" section of the documentation for more information.