Cisco Catalyst 9400 User Manual

• Bad cabling
• A bad port
• Speed and Duplex mismatch
• Network interface card (NIC) issues
1. If you troubleshoot these common reasons and you are not able to narrow down the problem, enter the
show platform hardware iomd 1/0 data-path command to check the packet loss. If there are symptoms
of packet loss, enter the reload command to soft reset the switch.
2. If the reload results in supervisor module diagnostic failure, power cycle the switch.
3. Enter the Generic On Line Diagnostics (GOLD) show diagnostic bootup command to determine if
diagnostics fail.
If diagnostics fail again, the problem is most likely the hardware.
Contact Cisco Technical Support for further assistance.
4. If the supervisor module passes the diagnostic tests without any failure after the power cycle in Step 2,
perform these steps:
a. Collect the output from the show tech-support command.
b. Remove all power supplies from the box, and collect the serial numbers, Cisco part number, and
manufacturer of the power supplies.
c. Contact Cisco Technical Support with the information that you collected.
Troubleshooting When Module Not Online
You may have a module failure if you see a red status LED or if you see one of these statuses in the output
of the show module command:
• other
Make sure that the module is properly seated and that you have completely screwed down the module.
If the module still does not come online, enter the hw-module slot slot-number reset command. If the
module still does not come online, try the module in a spare slot, swap the module with the slot of a
module that works, or try the module in a different chassis.
• faulty
If the status is "faulty", run the shutdown and then no shutdown comands on the port. If this does not
resolve the problem, run the Generic Online Diagnostics (GOLD) diagnostic start module mod-number
test command to start the diagnostics on the selected module.
• power-deny
If the status is "power-deny,” the switch does not have enough power available to power this module.
Enter the show power command in order to confirm whether enough power is available.
• power-bad
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
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Troubleshooting the Software Configuration
Troubleshooting When Module Not Online

Cisco Catalyst 9400 Specifications

General

Brand	Cisco
Model	Catalyst 9400
Category	Switch
Language	English