358 | S-Series Debugging and Diagnostics
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Auto Save on Crash or Rollover
Exception information on 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, the TRACE_LOG_DIR
files can be reached by FTP or by using the show file command
from the flash://TRACE_LOG_DIR directory.
On a Standby unit, the TRACE_LOG_DIR
files can be reached only by using the show file command
from the flash://TRACE_LOG_DIR directory.
Last restart reason
If an S4810 system restarted for some reason (automatically or manually), the show system command
output includes the reason for the restart. The following table shows the reasons displayed in the output
and their corresponding causes.
Hardware watchdog timer
The hardware watchdog command automatically reboots an FTOS switch/router with a single RPM that is
unresponsive. This is a last resort mechanism intended to prevent a manual power cycle.
Note: Non-management member units do not support this functionality.
Table 14-1. Line card restart causes and reasons
Causes Displayed Reasons
Remote power cycle of the chassis push button reset
reload soft reset
reboot after a crash soft reset
Table 14-2. Hardware Watchdog Command
Command Description
hardware watchdog Enable the hardware watchdog mechanism.
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