user manual
Table Of Contents
- Cisco Active Network Abstraction Fault Management User Guide Version 3.6 Service Pack 1
- Contents
- About This Guide
- Fault Management Overview
- Fault Detection and Isolation
- CiscoANA Event Correlation and Suppression
- Advanced Correlation Scenarios
- Device Unreachable Alarm
- IP Interface Failure Scenarios
- Multi Route Correlation
- Generic Routing Encapsulation (GRE) Tunnel Down/Up
- BGP Process Down Alarm
- MPLS Interface Removed Alarm
- LDP Neighbor Down Alarm
- Correlation Over Unmanaged Segments
- Event and Alarm Configuration Parameters
- Impact Analysis
- Supported Service Alarms
- Event and Alarm Correlation Flow
CHAPTER
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Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1
OL-14284-01
7
Impact Analysis
This chapter describes the impact analysis functionality:
• Impact Analysis Options—Describes automatic and proactive impact analysis.
• Impact Report Structure—Describes the structure of the impact report that is generated.
• Affected Severities—Describes the severities used for automatic impact analysis.
• Impact Analysis GUI—Describes how the user can view impact analysis information in Cisco ANA
NetworkVision.
• Disabling Impact Analysis—Describes enabling and disabling impact analysis for specific alarm,
and which alarms support this feature.
• Accumulating Affected Parties—Describes how Cisco ANA NetworkVision automatically
calculates the accumulation of affected parties during automatic impact analysis.
Impact Analysis Options
Impact analysis is available in two modes:
• Automatic impact analysis—When a fault occurs which has been identified as potentially service
affecting, Cisco ANA automatically generates the list of potential and actual service resources that
were affected by the fault, and embeds this information in the ticket along with all the correlated
faults.
Note This only applies to specific alarms. Not every alarm initiates affected calculation.
• Proactive impact analysis—Cisco ANA provides “what-if” scenarios for determining the possible
affect of network failures. This enables on-demand calculation of affected service resources for
every link in the network, thus enabling an immediate service availability check and analysis for
potential impact and identification of critical network links. Upon execution of the “what-if”
scenario, the Cisco ANA fabric initiates an end-to-end flow, which determines all the potentially
affected edges.
Note For more information about fault scenarios which are considered as service affecting in an MPLS
network and supported by Cisco ANA, refer to the Cisco Active Network Abstraction MPLS User Guide.