Interfaces Overview

This manual describes the steps you take to investigate interface problems. For each interface type, the investigation process is described in three corresponding chapters:

• Monitor the interface
• Perform a loopback test on the interface
• Locate alarms and errors

The monitor interfaces chapter helps you determine the nature of the interface problem. The loopback test chapter provides information to assist you isolate the source of the problem, and the locate alarms and errors chapter explains some of the alarms and errors for that occur on that interface.

This chapter discusses the following topics:

• Interfaces Covered in These Topics
• Interfaces Supported by the Junos OS
• Interface Descriptors
• Interface Naming
• Interface and Router Clock Sources