Users Guide
NOTE: The system reboots when the offline diagnostics complete. This is an automatic process. The following
warning message appears when you implement the offline stack-unit command: Warning - Diagnostic
execution will cause stack-unit to reboot after completion of diags. Proceed with Offline-
Diags [confirm yes/no]:y
After the system goes offline, you must reload or run the online stack-unit
stack-unit-number
command for the normal operation.
2. Confirm the offline status.
EXEC Privilege mode
show system brief
3. Start diagnostics on the unit.
diag stack-unit stack-unit-number
When the tests are complete, the system displays the following message and automatically reboots the unit.
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 Networking OS buffers trace messages which are continuously written by various Dell 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 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 92. 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
Debugging and Diagnostics 833