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Appendix J Troubleshooting
J.10.5 Configuration Center, Chassis View, Diagn ostics Center, and Statistics Report Problems
Figure J-2 Client/Server Architecture for Alarm Components
J.10.5.5.2 XML Schema for Alarm Rules
Alarm rules are defined in XML, specifically, in a file named $HOME/xml/ruledata.xml. These alarm
rules are read once when NMServer starts. When events are processed, the rules are queried from
memory to determine what action, with regard to alarms, should be taken on the event. There are three
types of alarm rules defined in the XML schema: Correlated, Correlated Bitmap, and Transient.
Specifics on each of these three types are as follows.
1. Correlated Alarm Rule Type
The correlated alarm rule type is the most common in ruledata.xml. This rule is used when a network
element can be in only one of many states at any one time. If the entity were to change states, then the
previous alarm state would be cleared. Most network elements managed by CTM fall into this category.
A simple example is the database sync-up status of a node. The sync-up status can be one of Partial
Sync-Up, Sync-Up Failed, or In Sync. Any one of these states correlates out any other. See FigureJ-3.
Alarm Client
Network Monitor Server
(Alarm Components)
Alarm Service
Client
Alarm Repository
Alarm Observer
Client Handler
Object Tree
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Alarm Service