How to troubleshoot continuous Sensor reboots resulting in bad health

1. Stop the Sensor from rebooting:
   1. Connect to the Sensor via HyperTerminal, using a console cable.
      NOTE: View the Quick Start or Quick Tour Guide for your release of Sensor software, for further information.
       
   2. When the boot process finishes and you see a logon prompt, type the following command and press ENTER to turn off the watchdog task:
      
      watchdog off
      
      NOTE: You can confirm the status of the watchdog with the watchdog status command.
       
   3. For M-8000 only: Ensure that the cross-connect cables are connected properly and the link is up. If they are not, reseat the cables and confirm that the Sensor boots normally.
       
2. Verify details through the Sensor CLI by logging to Debug mode:
   1. Log on to the Sensor as admin
   2. Issue the following commands:

3. Log on to Debug mode. Type the following command and press ENTER:

4. Type the following commands and press ENTER after each command:

show startup stats
show sensor health
show eccerrors
show datapath processingunits
perf

NOTE: If you have an issue related to Incomplete Init Procedure at the Sensor, you can recover it by a Sensor power cycle:

1. Power cycle the Sensor (unplug the power cord from the back). This action reinitializes the internal Sibytes in the Sensor.
2. Wait for a while, then plug the power cord in and allow the Sensor to reboot.
3. Verify whether the Health Status is good and the Sensor reboot stopped after the power cycle. If not, follow the instructions from steps 2a to 2e again, collect the statistics, and continue to step 3 for further troubleshooting.

1. Perform a reload of the Sensor software via TFTP using the loadimage command. For more information, see KB56426.
2. If you have reloaded the Sensor via TFTP and the Sensor is booting properly, the troubleshooting process is complete. If not, continue to step 4 for further troubleshooting.