CHAPTER 7
Troubleshooting
• About this Section, on page 105
• System Boot Verification, on page 105
• Using LEDs to Identify Startup Problems, on page 106
• System Messages, on page 107
• Troubleshooting with Software , on page 107
• Troubleshooting the Power Supply, on page 107
• Troubleshooting the Fan Tray Assembly, on page 109
• Troubleshooting High Temperature Alarms , on page 110
• Troubleshooting the Switching Module, on page 111
• Troubleshooting Supervisor Modules, on page 111
• Contacting the Cisco Technical Assistance Center, on page 115
About this Section
This chapter describes how to perform basic troubleshooting on Cisco Catalyst 9400 Series Switches. Problems
with the initial startup are often caused by a switching module that has become dislodged from the backplane
or a power cord that is disconnected from the power supply.
Although temperature conditions above the maximum acceptable level rarely occur at initial startup, some
environmental monitoring functions are included in this chapter because they also monitor power supply
output voltages.
This chapter covers only the chassis component hardware aspects of troubleshooting. For software configuration
issues, refer to the software configuration guide
Note
System Boot Verification
When the initial system boot is complete, verify the following:
• That the system software boots successfully
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
105
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