4-3
Catalyst 3750 Switch Hardware Installation Guide
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Chapter 4 Troubleshooting
Diagnosing Problems
Note
If the switch is not configured, the mode buttons are all green. You can
omit Step 2 and run Express Setup to configure the switch.
Step 2
Continue holding down the Mode button. The LEDs stop blinking after 8
additional seconds, and then the switch reboots.
Note
These steps only work on a previously-configured switch.
The switch now behaves like an unconfigured switch. You can configure the
switch by using Express Setup as described in these sections.
•
“Starting Express Setup” section on page 1-4
•
“Configuring the Switch Settings” section on page 1-9
•
“Verifying Switch IP Address (Optional)” section on page 1-10
You can also configure the switch by using the command-line interface (CLI)
setup procedure described in these sections:
•
“Starting the Terminal Emulation Software” section on page D-9
•
“Entering the Initial Configuration Information” section on page D-10
Diagnosing Problems
Common switch problems fall into these categories:
•
Poor performance
•
No connectivity
•
Corrupted software
Table 4-1
describes how to detect and resolve these problems.