Basic Troubleshooting Tips - HP 650 Installation Manual

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Troubleshooting

Basic Troubleshooting Tips

Basic Troubleshooting Tips
Some of the router's console commands are used for the troubleshooting
instructions in this chapter. Refer to "Connect a console" (page 1-14) for
details on connecting to the console port. For details on the Configura-
tion Editor, refer to chapter 4 of the User's Guide. For details on NCL
(Network Command Language Interpreter) commands, refer to chapter
16 of the Operator's Reference.
Make sure that you have a valid network topology. If you have
trouble after a recent change to the network, switch back to the
previous topology. If you no longer have trouble, the new topology is
probably at fault.
Make sure that the router is plugged in and that cable connections
are secure.
If the console port does not work, refer to "Connect a console" (page
1-14), and then check "Troubleshooting a Terminal or Modem
Connection" (page 3-14.)
Check the router status, module status, and port status LEDs. For
information about using patterns of these LEDs to diagnose failures,
refer to tables 3-1 and 3-2 (pages 3-3 through 3-8). For more details
regarding these LEDs, refer to "LEDs and Buttons" in chapter 2
(page 2-4).
If none of the troubleshooting procedures in this chapter solves the
problem, press the Diag button on the routing engine. If the problem
persists, call for service from your HP dealer or service provider.