user manual

4-8
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
Figure 4-6 Interface Example 4
The following failures are identified in the network:
• A link-down alarm is generated on Serial0/0.
• A device unreachable alarm is generated for each CE.
• An ip interface status down alarm is generated for each IP interface above Serial0/0.
• An All interfaces down alarm is generated on Serial0/0.
The following correlation information is provided:
• The device unreachable alarms are correlated to the link-down alarm
• The ip interface status down alarm is correlated to the link-down alarm
• The All interfaces down alarm is correlated to the link-down alarm
• All the traps and syslogs for the subinterfaces are correlated to the link-down alarm
Interface Example 5
In this example on the PE1 device that has multipoint connectivity, one of the circuits under the IP
interface has gone down and the CE1 device which is connected to it has become unreachable. The status
of the IP interface has not changed and other circuits are still operational.
Figure 4-7 General Interface Example
The following failures are identified in the network:
• A device unreachable alarm is generated on CE1.
• A Syslog alarm is generated notifying the user about a circuit down.
interface Serial0/0.100
point-to-point
10.200.1.2
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
180437
All IP interface
above Serial0/0 change
state to "down"
Link is "down"
PE1
180440
CE1 unreachable
Circuit
down
syslog
CE2
CE3
Mixed Multipoint
and Point-to-point
connectivity
Cloud