Serial Number : Z1FX111100005Part Number : 7520051802Product Revision : 02Version : 8-3-11-631--More-TRACE LogsIn addition to the syslog buffer, to report hardware and software events and status information, Dell Networking OS buffers tracemessages which are continuously written by various Dell Networking OS software tasks.Each TRACE message provides the date, time, and name of the Dell Networking OS process. All messages are stored in a ring bufferthat you can save 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 filesthat 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.NOTE: Non-management member units do not support this functionality.Last Restart ReasonIf a Z9000 system restarted for some reason (automatically or manually), the show system command output includes the reasonfor the restart.The following table shows the reasons displayed in the output and their corresponding causes.Line Card Restart Causes and ReasonsCauses Displayed ReasonsRemote power cycle of the chassis push-button resetreload soft resetreboot after a crash soft resetHardware Watchdog TimerThe 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 CommandsThese 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 AssistanceCenter (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 statisticsZ-Series Debugging and Diagnostics 825
