NAS Pre-Processing rules are not excluding alarms

Products

• DX Unified Infrastructure Management (Nimsoft / UIM)

Issue/Introduction

After creating a pre-processing rule in NAS to exclude some alarms, and removing the alarm, they still come back at the probe's next polling interval and are still visible in the IM and OC.

Environment

Release : Any UIM 

Component : UIM NAS

Cause

If the pre-processing "exclude" rule is not excluding the alarm despite the matching criteria applies to the alarm it might be because the alarm is coming from a different replication nas/hub. 

Resolution

If the alarm comes from a  probe attached to a remote hub with its own nas (therefore not the nas the pre-processing profile has been defined on) then the alarm replication will bypass the pre-processing rule. If the alarm comes from a remote hub/nas  try to add the pre-processing in the remote hub/nas. 

The pre-processing intercepts alarms before they reach the nas. NAS Replication happens from nas to nas. So if an alarm reaches one of the replication nas'es, pre-processing rules are not applied.