Chapter Organization

Most chapters in this guide consist of a checklist at the beginning of the chapter listing the tasks and commands for monitoring the basic functions of a router and a network. Tasks include displaying various types of information about a router and the network, upgrading and reinstalling JUNOS software, tracing users and accounts, and collecting crash data. The tasks and commands are then explained in step-by-step procedures.

Each step-by-step procedure consists of some or all of the following parts:

• Purpose—Describes what is affected if this task is not performed or what is accomplished with this task.
• What Is... —Describes a component (usually hardware).
• Step(s) To Take—Lists the steps in the task.
• Action—Describes an action to perform in order to complete the step.
• Sample Output—Presents sample output relevant to the procedure.
• What It Means—Describes or summarizes what is presented in the sample output.
• Symptom/Indications—Describes a problem with the software or hardware.
• See Also—Lists other topics related to this task.
• Alternative Actions—Describes other commands or ways of doing the task.
• Syntax—Describes the full syntax of the command or configuration statement. For an explanation of how to read the syntax statements, see Documentation Conventions.