Users Guide

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 85. 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 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 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 specied 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 trac is internal (IPC trac) or
network control trac, which the CPU must process.
• View the modular packet buers 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 buers details per unit and the mode of allocation.
EXEC Privilege mode
show hardware stack-unit {0-11} buffer unit {0-1} total-buffer
• View the forwarding plane statistics containing the packet buer usage per port per stack unit.
EXEC Privilege mode
show hardware stack-unit {0-11} buffer unit {0-1} port {1-64 | all} buffer-info
• View the forwarding plane statistics containing the packet buer statistics per COS per port.
EXEC Privilege mode
S-Series Debugging and Diagnostics
977