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 LED 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 and all switching modules are installed properly in their slots, and that each initialized
without problems.
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
with what
it should be doing
. All system states in the
startup sequence are indicated by LEDs. By checking the LEDs, you can determine when and where the system
failed in the startup sequence. If you have problems after the switch is on, refer to the following subsystem
troubleshooting information and the configuration procedures in the software configuration guide for your
switch.
After you connect the power cords to your switch, follow these steps to determine whether your system is
operating properly:
Procedure
Step 1
Check the power supply LEDs:
The INPUT LED should turn green when power is applied to the supply. The LED should remain on during
normal system operation.
If the INPUT LED does not light, or if the LED labeled FAIL lights, see the “Troubleshooting the Power
Supply” section.
If a power supply is installed and not connected to a power source, power supply LEDs are not lit.
Note
Step 2
Listen for the system fan assembly. The system fan assembly should be operating whenever system power is
on. If you do not hear it when the switch is on, see the “Troubleshooting the Fan Assembly” section.
Step 3
Check that the LEDs on the supervisor module light as follows:
• The STATUS LED flashes amber once and stays amber during diagnostic boot tests.
• It turns green when the module is operational (online).
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
130
Troubleshooting
Using LEDs to Identify Startup Problems
Содержание Catalyst 9400 Series
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