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Trace Logs
In addition to the syslog buer, Dell Networking OS buers 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 buer. You can
save the messages to a le either manually or automatically after failover.
Auto Save on Crash or Rollover
Exception information for MASTER or standby units is stored in the ash:/TRACE_LOG_DIR directory. This directory contains les that
save trace information when there has been a task crash or timeout.
• On a MASTER unit, you can reach the TRACE_LOG_DIR les by FTP or by using the show file command from the ash://
TRACE_LOG_DIR directory.
• On a Standby unit, you can reach the TRACE_LOG_DIR les only by using the show file command from the ash://
TRACE_LOG_DIR directory.
NOTE: Non-management member units do not support this functionality.
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
These commands display information from a hardware sub-component and from hardware-based feature tables.
The following lists the show hardware commands available as of the latest Dell Networking OS version.
NOTE
: Only use the show hardware commands under the guidance of Dell Networking Technical Assistance Center.
• 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 {0-10} total-buffer
• View the forwarding plane statistics containing the packet buer usage per port per stack unit.
S5000 Debugging and Diagnostics
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