Concept Guide

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 {1–12} 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 {1–12} 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 input and output statistics on the party bus, which carries inter-process communication trac between CPUs.
EXEC Privilege mode
show hardware stack-unit {1–12} cpu party-bus statistics
• View the ingress and egress internal packet-drop counters, MAC counters drop, and FP packet drops for the stack unit on per port
basis.
EXEC Privilege mode
show hardware stack-unit {1–12} drops unit {0-0}
This view helps identifying the stack unit/port pipe/port that may experience internal drops.
• View the input and output statistics for a stack-port interface.
EXEC Privilege mode
show hardware stack-unit {1–12} stack-port {portnumber}
• View the counters in the eld processors of the stack unit.
EXEC Privilege mode
show hardware stack-unit {1–12} unit {0-0} counters
• View the details of the FP Devices and Hi gig ports on the stack-unit.
EXEC Privilege mode
show hardware stack-unit {1–12} unit {0-0} details
• View the Multicast IPMC replication table from the bShell.
EXEC Privilege mode
show hardware stack-unit {1–12} unit {0-0} ipmc-replication
• View the internal statistics for each port-pipe (unit) on per port basis.
Debugging and Diagnostics
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