3 Start diagnostics on the unit.diag stack-unit stack-unit-numberWhen the tests are complete, the system displays the following message and automatically reboots the unit.Dell#00:09:42 : Diagnostic test results are stored on file: flash:/TestReport-SU-1.txtDiags completed... Rebooting the system now!!!Mar 12 10:40:35: %S6000:0 %DIAGAGT-6-DA_DIAG_DONE: Diags finished on stack unit 1Diagnostic results are printed to a file in the flash using the filename format TestReport-SU-.txt.Log messages differ somewhat when diagnostics are done on a standalone unit and on a stack member.4 View the results of the diagnostic tests.EXEC Privilege modeshow file flash://TestReport-SU-stack-unit-id.txtExamples of Running Offline DiagnosticsThe following example shows the offline stack-unit stack-unit-number command.Dell#offline stack-unit 1Warning - Taking unit offline for running diagnosticswill 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 isissued.Proceed with Offline [confirm yes/no]:yesTrace LogsIn addition to the syslog buffer, Dell Networking OS buffers trace messages which are continuously written by various Dell Networking OSsoftware 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 cansave the messages to a file either manually or automatically after failover.Auto Save on Crash or RolloverException information for MASTER or standby units is stored in the flash:/TRACE_LOG_DIR directory. This directory contains files thatsave 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 TimerThe 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 MonitoringThe device components use environmental monitoring hardware to detect transmit power readings, receive power readings, andtemperature updates.To receive periodic power updates, you must enable the following command.• Enable environmental monitoring.enable optic-info-update intervalDebugging and Diagnostics 1049
