Installation guide

4-3
Catalyst 3750 Switch Hardware Installation Guide
78-15136-02
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.