CHAPTER 19
Troubleshooting the Software Configuration
This chapter describes how to identify and resolve software problems related to the Cisco IOS software on
the switch. Depending on the nature of the problem, you can use the command-line interface (CLI), Device
Manager, or Network Assistant to identify and solve problems.
Additional troubleshooting information, such as LED descriptions, is provided in the hardware installation
guide.
• Information About Troubleshooting the Software Configuration, on page 389
• How to Troubleshoot the Software Configuration, on page 398
• Troubleshooting Packet Loss, on page 409
• Troubleshooting When Module Not Online, on page 410
• Troubleshooting Interface Problems, on page 411
• Troubleshooting when a Workstation Is Unable to Log In to the Network, on page 411
• Verifying Troubleshooting of the Software Configuration, on page 412
• Scenarios for Troubleshooting the Software Configuration, on page 414
• Configuration Examples for Troubleshooting Software, on page 416
• Additional References for Troubleshooting Software Configuration, on page 418
• Feature History for Troubleshooting Software Configuration, on page 418
Information About Troubleshooting the Software Configuration
Software Failure on a Switch
Switch software can be corrupted during an upgrade by downloading the incorrect file to the switch, and by
deleting the image file. In all of these cases, there is no connectivity.Follow the steps described in the Recovering
from a Software Failure, on page 398 section to recover from a software failure.
Lost or Forgotten Password on a Device
The default configuration for the device allows an end user with physical access to the device to recover from
a lost password by interrupting the boot process during power-on and by entering a new password. These
recovery procedures require that you have physical access to the device.
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
389
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