user manual

5-3
Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1
OL-14284-01
Chapter 5 Correlation Over Unmanaged Segments
Cloud Problem Alarm
Cloud Problem Alarm
For some events, when there is no root cause found, a special cloud problem alarm is created. These
events are then correlated to the alarm. The cloud problem alarm has a major severity, and is
automatically cleared after a delay.
Note When required a correlation filter, filters the cloud problem. This enables or disables the ability of an
alarm to create a cloud problem alarm, and to correlate to it. The default value is false for all alarms in
the system, meaning that an alarm does not correlate to the cloud problem alarm by default. However,
there are several alarms that override the default configuration and are set to true, as follows:
BGP neighbor down syslog
OSPF neighbor loss syslog
EIGRP router query to neighbors timeouted syslog
ipx 3 bad igrp sap syslog
Cloud Correlation Example
In this example, two devices that have OSPF configured are connected through a cloud. A malfunction
occurs inside the unmanaged network that causes the OPSF neighbor down alarm to be generated. In this
case the OSPF neighbor down alarm is correlated to the cloud problem.
Figure 5-1 Cloud Correlation Example
On the PE1 device, the OSPF neighbor down alarm was received, and no root cause was detected in any
of the managed devices. A disconnected link inside the unmanaged network caused the OSPF neighbor
down alarm. The following alarms are generated and correlated:
• Cloud problem on the cloud:
– OSPF neighbor down on the PE1 is correlated to the cloud problem alarm.
ISDN
Backup
Frame Relay
CE1
60.60.60.4
PE1
80.80.80.69
Point-to-point
interface
State "down"
Interface Serial
1/0.500
point-to-point
102.0.0.2
Interface Serial
1/0.100
point-to-point
102.0.0.2
Routing Protocol
neighbor down syslog
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