Users Guide

Trace Logs
In addition to the syslog buffer, Dell Networking OS buffers 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 buffer. You can save the messages to a file either manually or automatically after failover.
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.
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.
Enabling Environmental Monitoring
The device components use environmental monitoring hardware to detect transmit power readings, receive
power readings, and temperature updates.
To receive periodic power updates, you must enable the following command.
• Enable environmental monitoring.
enable optic-info-update interval
Example of the show interfaces transceiver Command
Dell#show interfaces fortyGigE 1/52 transceiver
QSFP 52 Serial ID Base Fields
QSFP 52 Id = 0x0d
QSFP 52 Ext Id = 0x00
QSFP 52 Connector = 0x0c
QSFP 52 Transceiver Code = 0x04 0x00 0x00 0x00 0x00 0x00 0x00 0x00
QSFP 52 Encoding = 0x05
Debugging and Diagnostics 1152