Cisco Catalyst 9400 User Manual

How to Troubleshoot the Software Configuration
Recovering from a Software Failure
Before you begin
This recovery procedure requires that you have physical access to the switch.
This procedure uses boot loader commands and TFTP to recover from a corrupted or incorrect image file.
Set the baud rate of the terminal to match the the default rate of 9600 bits per second [bps] of the switch
console port. If the baud rate is set to a value other than 9600 bps, access to the console will be lost until the
speed is set back to the dafault.
Procedure
Step 1 From your PC, download the software image file (image.bin) from Cisco.com.
Step 2 Load the software image to your TFTP server.
Step 3 Connect your PC to the switch Ethernet management port.
Step 4 Unplug the switch power cord.
Step 5 Press the Mode button, and at the same time, reconnect the power cord to the switch.
Step 6 From the bootloader (ROMMON) prompt, ensure that you can ping your TFTP server.
a) Set switch IP address: set IP_ADDRESS ip_address
Example:
switch: set IP_ADDRESS 192.0.2.123
b) Set switch subnet mask: set IP_SUBNET_MASK subnet_mask
Example:
switch: set IP_SUBNET_MASK 255.255.255.0
c) Set default gateway: set DEFAULT_GATEWAY ip_address
Example:
switch: set DEFAULT_ROUTER 192.0.2.1
d) Verify that you can ping the TFTP server switch: ping ip_address_of_TFTP_server
Example:
switch: ping 192.0.2.15
ping 192.0.2.1 with 32 bytes of data...
Host 192.0.2.1 is alive.
switch:
Step 7 Choose one of the following:
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
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Troubleshooting the Software Configuration
How to Troubleshoot the Software Configuration

Cisco Catalyst 9400 Specifications

General

Brand	Cisco
Model	Catalyst 9400
Category	Switch
Language	English