How To Troubleshoot The Software Configuration; Recovering From A Software Failure - Cisco Catalyst 9500 Manual

How to Troubleshoot the Software Configuration

• DHCP or IEEE 802.1x failures if the switch does not forward or respond to requests
How to Troubleshoot the Software Configuration

Recovering from a Software Failure

Before you begin
Note
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 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:
System Management Configuration Guide, Cisco IOS XE Amsterdam 17.2.x (Catalyst 9500 Switches)
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Emergency install feature is not supported on the Cisco Catalyst 9500 Series High Performance Switches.
Troubleshooting the Software Configuration