294 | Z-Series Debugging and Diagnosticsw w w . d e l l . c o m | s u p p o r t . d e l l . c o mLast restart reasonIf a Z9000 system restarted for some reason (automatically or manually), the show system commandoutput includes the reason for the restart. The following table shows the reasons displayed in the outputand their corresponding causes.Hardware watchdog timerThe hardware watchdog command automatically reboots an FTOS switch/router when a unit isunresponsive. This is a last resort mechanism intended to prevent a manual power cycle.show hardware commandsThe show hardware command tree consists of EXEC Privilege commands used with the Z9000 system.These commands display information from a hardware sub-component and from hardware-based featuretables. 0Table 12-2 lists the show hardware commands available as of the latest FTOS version on the Z9000.Table 12-1. Line card restart causes and reasonsCauses Displayed ReasonsRemote power cycle of the chassis push button resetreload soft resetreboot after a crash soft resetCommand Descriptionhardware watchdog Enable the hardware watchdog mechanism.Note: The show hardware command tree is supported on the S4810 and Z9000.Note: The show hardware commands should only be used under the guidance of the Dell Force10Technical Assistance Center.
