Configuration manual

Last Restart Reason
If a Z9000 system restarted 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.
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 when a
unit is unresponsive.
This is a last resort mechanism intended to prevent a manual power cycle.
show hardware Commands
These commands display information from a hardware subcomponent and from hardware-based feature
tables.
NOTE: Use the show hardware commands only under the guidance of the Dell Networking
Technical Assistance Center (TAC).
• View internal interface status of the stack-unit CPU port which connects to the external management
interface.
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.
show hardware stack-unit {0-11} cpu data-plane statistics
It 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.
show hardware stack-unit {0-11} buffer total-buffer
• View the modular packet buffers details per unit and the mode of allocation.
show hardware stack-unit {0-11} buffer unit {0-1} total-buffer
• View the forwarding plane statistics containing the packet buffer usage per port per stack unit.
show hardware stack-unit {0-11} buffer unit {0-1} port {1-64 | all} buffer-
info
• View the forwarding plane statistics containing the packet buffer statistics per COS per port.
show hardware stack-unit {0-11} buffer unit {0-1} port {1-64} queue {0-14 |
all} buffer-info
• View input and output statistics on the party bus, which carries inter-process communication traffic
between CPUs.
Z-Series Debugging and Diagnostics
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