Learning How to Create Behavior Models - How to Use Alarms - Review and Summary -
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Review and Summary

The following section includes exercises and questions to help you review what you have learned in this chapter.

Review Exercises

Complete the following exercises using the skills you learned in this chapter.

1. Create a new alarm that will always fire true triggers. Some of the actions you will take include:
   1. Naming the alarm 1Always
   2. Including two states, Ground and True
   3. Including a transition between the two states prompted by the trigger TrueTrigger
   4. Leaving the actions empty and the alarm off
2. Modify the 1HighTraffic alarm, by changing Scope to Node. Now turn on the 1HighTraffic alarm and the 1CheckTraffic poll.

   What is now different about what the Alarm Summary window displays?

Review Questions

Answer the following questions using the knowledge you learned in this chapter. See the Answers to the Chapter 4 Review Questions.

1. What causes an alarm to move from one state to another?

   

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2. When is it unnecessary to specify a property for an alarm definition?

   

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3. You need an alarm that first checks for high traffic on an interface and only then checks for a high error rate. Assume that you've already defined the necessary polls to collect the appropriate data. Draw an example of the state diagram below:

   

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Summary of What You Learned

In this chapter you learned how to create, modify, and enable alarms in NerveCenter. You also learned several new concepts. The checklist below should help you review once more before going to the next chapter.

You learned:

• How to create an alarm
• How to design a state diagram
• How to enable an alarm
• How to modify an alarm's state diagram
• How to add an additional state to an alarm

You also were introduced to the following concepts:

• Alarm
• State diagram
• Transition