Administrator Guide

Diagnostic results are printed to a file in the flash using the filename format TestReport-SU-<stack-unit-id>.txt.
Log messages differ somewhat when diagnostics are done on a standalone unit and on a stack member.
4. View the results of the diagnostic tests.
EXEC Privilege mode
show file flash://TestReport-SU-stack-unit-id.txt
Trace Logs
In addition to the syslog buffer, Dell EMC Networking OS buffers trace messages which are continuously written by various Dell EMC
Networking OS software tasks to report hardware and software events and status information.
Each trace message provides the date, time, and name of the Dell EMC Networking OS process. All messages are stored in a ring buffer.
You can save the messages to a file either manually or automatically after failover.
Auto Save on Crash or Rollover
Exception information for MASTER or standby units is stored in the flash:/TRACE_LOG_DIR directory. This directory contains files that
save trace information when there has been a task crash or timeout.
• On a MASTER unit, you can reach the TRACE_LOG_DIR files by FTP or by using the show file command from the flash://
TRACE_LOG_DIR directory.
• On a Standby unit, you can reach the TRACE_LOG_DIR files only by using the show file command from the flash://
TRACE_LOG_DIR directory.
NOTE: Non-management member units do not support this functionality.
Last Restart Reason
If the system restarts for some reason (automatically or manually), the show system command output includes the reason for the
restart.
The following table shows the reasons displayed in the output and their corresponding causes.
Table 122. Line Card Restart Causes and Reasons
Causes Displayed Reasons
Remote power cycle of the chassis push button reset
reload soft reset
reboot after a crash soft reset
Hardware Watchdog Timer
The hardware watchdog command automatically reboots a Dell EMC Networking OS switch or router with a single RPM that is
unresponsive.
This is a last resort mechanism that is intended to prevent a manual power cycle.
Using the Show Hardware Commands
The show hardware command tree consists of commands used with the system. These commands display information from a
hardware sub-component and from hardware-based feature tables.
NOTE: Use the show hardware commands only under the guidance of the Dell Technical Assistance Center.
The following lists the show hardware commands available as of the latest Dell EMC Networking OS version.
• View internal interface status of the stack-unit CPU port which connects to the external management interface.
EXEC Privilege mode
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Debugging and Diagnostics