Trace Logs; Auto Save On Crash Or Rollover; Last Restart Reason - Dell S3048-ON Configuration Manual

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.
Dell#00:09:42 : Diagnostic test results are stored on file: flash:/TestReport-SU-0.txt
Diags completed... Rebooting the system now!!!
Mar 12 10:40:35: %S6000:0 %DIAGAGT-6-DA_DIAG_DONE: Diags finished on stack unit 1
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
Examples of Running Offline Diagnostics

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 97. Line Card Restart Causes and Reasons
Causes
Remote power cycle of the chassis
reload
reboot after a crash
Displayed Reasons
push button reset
soft reset
soft reset
Debugging and Diagnostics 999