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
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Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1
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Chapter 4 Advanced Correlation Scenarios
Multi Route Correlation
Figure 4-11 Multi Route Correlation Example 2
In this case the system will provide the following report:
• Root cause—Device Unreachable. Link Down #1, Link Down #2 or Link Down #3 is identified as
the root cause for Device Unreachable (CE2), depending on which one occurred closest in time to
the Device Unreachable event.
Multi Route Correlation Example 3
In this example, two paths exists from CE1 to PE2. Several links went down and as a result router CE1
became unreachable. In addition, router P4 is an unmanaged device.
Figure 4-12 Multi Route Correlation Example 3
In this case the system will provide the following report:
• Root cause—Device Unreachable. Link Down #1 or Link Down #2 is identified as the root cause for
Device Unreachable (CE1), depending on which one occurred closest in time to the Device
Unreachable event.
CE1
CE2
Device
unreachable
PE1
P7
P8PE3
P1
P4
P2 P3
P5
P6 PE2
Link down
#2
MNG core MNG core
182429
Link
down #1
Link
down #1
Link
down #3
Link
down #2
Device
unreachable
CE1 PE1 P1
P4
P2 P3
P5
P6 PE2
Link down
#1
Link down
#2
MNG core
Unmanaged
device
MNG core
182430