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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 133. 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 an Dell EMC Networking OS switch/router with a single RPM that
is unresponsive.
This is a last resort mechanism 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
show hardware stack-unit {0-11} cpu management statistics
● View driver-level statistics for the data-plane port on the CPU for the specified stack-unit.
EXEC Privilege mode
show hardware stack-unit {0-11} cpu data-plane statistics
This view provides insight into the packet types entering the CPU to see whether CPU-bound traffic is internal (IPC traffic)
or network control traffic, which the CPU must process.
● View the modular packet buffers details per stack unit and the mode of allocation.
EXEC Privilege mode
show hardware stack-unit {0-11} buffer total-buffer
● View the modular packet buffers details per unit and the mode of allocation.
EXEC Privilege mode
Debugging and Diagnostics
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