Administrator Guide

Table Of Contents
The following example shows the offline stack-unit stack-unit-number command.
DellEMC#offline stack-unit 1
Warning - Taking unit offline for running diagnostics
will make it operationally down, causing traffic disruption through the unit.
Please make sure that stacking/fanout not configured for Diagnostics execution.
Also reboot/online command is necessary for normal operation after the offline command is
issued.
Proceed with Offline [confirm yes/no]:yes
Trace Logs
In addition to the syslog buffer, Dell EMC Networking OS buffers trace messages which are continuously written by various Dell EMC
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 EMC 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.
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.
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
DellEMC#show interfaces tengigabitethernet 1/1/2/1 transceiver
QSFP 1/2/1 Serial ID Base Fields
QSFP 1/2/1 Id = 0x0d
QSFP 1/2/1 Ext Id = 0x00
QSFP 1/2/1 Connector = 0x23
QSFP 1/2/1 Transceiver Code = 0x08 0x00 0x00 0x00 0x00 0x00 0x00 0x00
QSFP 1/2/1 Encoding = 0x00
QSFP 1/2/1 Length(SFM) Km = 0x00
QSFP 1/2/1 Length(OM3) 2m = 0x00
QSFP 1/2/1 Length(OM2) 1m = 0x00
QSFP 1/2/1 Length(OM1) 1m = 0x00
QSFP 1/2/1 Length(Copper) 1m = 0x01
QSFP 1/2/1 Vendor Rev = A
QSFP 1/2/1 Laser Wavelength = 38.65 nm
QSFP 1/2/1 CheckCodeBase = 0x0d
QSFP 1/2/1 Serial ID Extended Fields
QSFP 1/2/1 BR max = 0
QSFP 1/2/1 BR min = 0
QSFP 1/2/1 Vendor SN = APF12380010GME
QSFP 1/2/1 Datecode = 120925
QSFP 1/2/1 CheckCodeExt = 0xf2
Debugging and Diagnostics
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