CHAPTER 9
Troubleshooting
Diagnosing Problems
Initialization Sequence
Copyright © 2010, Juniper Networks, Inc.
This chapter explains how you can troubleshoot a specific problem, such as abnormal
LED activity or no system power, when you power up the router. It contains the following
sections:
When you first encounter a system problem:
Make sure power connections are secure attached.
1.
Observe the system's LEDs carefully.
2.
Make sure cable connections on the system modules are securely attached.
3.
If a problem is beyond the scope of this chapter, see "Contacting Customer Support and
Returning Hardware" on page 111 for further instructions.
NOTE: Running the show version, show hardware, and show environment
commands is often a good first step when trying to troubleshoot a problem.
Each line module is initialized independently. As a result, the command-line interface
(CLI) on the switch route processor (SRP) module might become available before the
line modules have completed initialization. Commands relating to a line module might
fail if the module has not completed initialization. Use the show version command to
display line module status. Do not enter commands for a line module until its state is
online.
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