Chapter 5 Troubleshooting; System Boot Verification; Using Leds To Identify Startup Problems - Cisco Catalyst 4500e Series Installation Manual

System Boot Verification

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This chapter covers only the chassis component hardware aspects of troubleshooting. For software
Note
configuration issues, refer to the software configuration guide
http://www.cisco.com/en/US/products/hw/switches/ps4324/products_installation_and_configuration_g
uides_list.html
or command reference
http://www.cisco.com/en/US/products/hw/switches/ps4324/prod_command_reference_list.html
for your software release.
System Boot Verification
When the initial system boot is complete, verify the following:
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If all of these conditions are met and the hardware installation is complete, refer to the software
configuration guide and command reference publications for your switch so that you can troubleshoot
the software.
If any of these conditions is not met, use the procedures in this chapter to isolate and, if possible, resolve
the problem.

Using LEDs to Identify Startup Problems

The key to success when troubleshooting the system is to isolate the problem to a specific system
component. Your first step is to compare what the system is doing to what it should be doing. All system
states in the startup sequence are indicated by LEDs. By checking the LEDs, you can determine when
Catalyst 4500 E-Series Switches Installation Guide
5-2
Troubleshooting Backplane Modules, page 5-7
Troubleshooting Switching Modules, page 5-8
Troubleshooting Supervisor Engines, page 5-10
Some Problems and Solutions, page 5-14
That the system software boots successfully
Hook up a terminal and view the startup banner. Use an RJ-45-to-RJ-45 rollover cable to connect
the console port to a PC with terminal emulation software set for 9600 baud, 8 data bits, no parity,
and 1 stop bit. Watch for any system messages after startup.
That the power supplies are supplying power to the system
The power supply's LEDs should be green. Use the show environment Cisco IOS command to view
power supply activity.
That the system fan assembly is operating
Listen for fan activity. The Fan tray LED should be green during operation. Use the show
environment Cisco IOS command to view fan tray activity.
That the supervisor engine and all switching modules are installed properly in their slots, and that
each initialized without problems
Chapter 5 Troubleshooting
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