System Messages; Troubleshooting With Software; Troubleshooting The Power Supply - Cisco Catalyst 9404R Switch Hardware Installation Manual

Troubleshooting
• The MANAGEMENT LED turns green when the module is operational (online) and a link is established
• If there is a problem with the supervisor module, try reseating the supervisor module in the chassis and
• Verify that the STATUS LEDs on each switching module is green when the supervisor module completes
• If the boot information and system banner are not displayed, verify that the terminal is set for 9600 baud,

System Messages

System messages appear on the console if you have enabled console logging or appear in the syslog if you
have enabled syslog. Many messages are for informational purposes only and do not indicate an error condition.
Enter the show logging command to display the log messages. To better understand a specific system message,
refer to the system message guide for your software release.

Troubleshooting with Software

Many problems can be identified with CLI commands, and following sections will mention them as appropriate.
Certain problems can be due to not having the right software to support your hardware. For the most recent
software release to get the current recommended version for a particular system component, please refer to
the release notes at:
products-release-notes-list.html

Troubleshooting the Power Supply

To help isolate a power subsystem problem, follow these steps:
• If the system software is unable to start up, this LED turns red.
If the LED is red, connect a console to the management port and use the show environment command
to check for possible problems.
with another network device. If no signal is detected, the LED turns off.
restarting the switch. For more troubleshooting information, see the "Troubleshooting Supervisor Modules"
section.
initialization.
This LED indicates that the supervisor module and switching modules are receiving power, have been
recognized by the supervisor module, and contain a valid Flash code version. However, this LED does
not indicate the state of the individual interfaces on the switching modules. If a STATUS LED is red,
try reseating the switching module or supervisor module and restarting the switch. For more information,
see the "Troubleshooting Switching Modules" section. If you determine that the switching module is not
operating, contact Cisco TAC as described in the "Some Problems and Solutions" section.
8 data bits, no parity, and 1 stop bit and connected properly to the console port.
https://www.cisco.com/c/en/us/support/switches/catalyst-9400-series-switches/
Cisco Catalyst 9400 Series Switches Hardware Installation Guide

System Messages

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