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
4-7
Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1
OL-14284-01
Chapter 4 Advanced Correlation Scenarios
IP Interface Failure Scenarios
• An ip interface status down alarm is generated on the PE.
The following correlation information is provided:
• The root cause is device unreachable:
–
The ip interface status down alarm is correlated to the device unreachable alarm.
–
The syslogs and traps for the related subinterfaces are correlated to the ip interface status down
alarm.
Interface Example 3
In this example there is a failure of multiple IP interfaces above the same physical port (mixed
point-to-point and multipoint Frame Relay connectivity). CE1 (Router2) has a point-to-point connection
to PE1 (Router10). CE1 and CE2 (Router3) have multipoint connections to PE1. The IP interfaces on
PE1 that are connected to CE1, and CE2 are all configured above Serial0/0. The “keep alive” option is
enabled. A link is disconnected inside the unmanaged network that has caused all the CEs to become
unreachable.
Figure 4-5 Interface Example 3
The following failures are identified in the network:
• All the CEs become unreachable.
• An ip interface status down alarm is generated for each IP interface above Serial0/0 that has failed.
The following correlation information is provided:
• The root cause is All IP interfaces down on Serial0/0 port:
–
The ip interface status down alarms are correlated to the All IP interfaces down alarm.
–
The device unreachable alarms are correlated to the All IP interfaces down alarm.
–
The syslogs and traps for the related subinterfaces are correlated to the All IP interfaces down
alarm.
Interface Example 4
In this example there is a link down. In a situation where a link down occurs, whether it involves a cloud
or not, the link failure is considered to be the most probable root cause for any other failures. In this
example, a link is disconnected between the unmanaged network and the PE.
interface Serial0/0.100
point-to-point
10.200.1.2
interface Serial0/0.100
point-to-point
10.200.3.3
interface Serial0/0.100
point-to-point
10.200.3.10
interface Serial0/0.101
point-to-point
10.200.1.3
interface Serial0/0.55
multipoint
10.200.1.10
unreachable
Router2
10.222.1.2
unreachable
Router2
10.222.1.3
Frame-Relay
cloud
Mixed Multipoint and
Point-to-point
connectivity
Router10
10.222.1.10
180436
All IP interface
above Serial0/0 change
state to "down"