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Cisco Prime Network 4.0 User Guide
OL-29343-01
Chapter 9 Working with Tickets in Prime Network Vision
Impact Analysis in Prime Network
Initially, Prime Network might identify the services as either potentially or real affected. As time
progresses and more information is accumulated from the network, Prime Network updates the
information to indicate which of the potentially affected parties are real or recovered.
The indications for these states are available through both the API and in the GUI.
Note There is no clear state for the affected services when the alarm is cleared.
Accumulating Affected Parties
During automatic impact analysis, Prime Network automatically calculates the accumulation of affected
parties. This information is embedded in the ticket along with all of the correlated faults.
In the following example, these alarm types exist in the correlation tree:
• Ticket root-cause alarm (Card Out).
• An alarm which is correlated to the root cause and has other alarms correlated to it (Link A Down).
• An alarm with no other alarms correlated to it (Link B Down and BGP Neighbor Loss).
An event sequence is correlated to each of these alarms.
Figure 9-4 Correlation Tree Example
Prime Network identifies the affected parties for each type of alarm and accumulates the following
information:
• The affected parties reported on all the events in the alarm event sequence, including flapping
alarms.
• The affected parties reported on the alarms that are correlated to it.
The gathered information includes the accumulation of the affected report of all the events in its own
correlation tree.
For example, in Figure 9-4:
• BGP neighbor loss includes the affected parties of all events in its own event sequence.
• Link A Down includes the affected parties of its own event sequence and the accumulated
information of the BGP Neighbor Loss event.
Accumulating the Affected Parties in an Alarm
If two events form part of the same event sequence in a specific alarm, the recurring affected pairs are
displayed only once in the Affected Parties tab. If different affected severities are reported for the same
pair, the pair is marked with the severity that was reported by the latest event, according to the time
stamp.
Card out
|
----- Link A down
| |
| ------BGP neighbor loss
|
----- Link B down
Card out
|
----- Link A down
| |
| ------BGP neighbor loss
|
----- Link B down
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