How to troubleshoot high CPU usage on ATP/USG FLEX?

Zyxel_Emily

If you notice occasional high CPU usage on the ATP/USG FLEX, which is causing slow web page loading or management interface access delays, you can follow these steps to collect important diagnostic information:

Steps to analyze high CPU usage:

1. Log in to the device console during high CPU usage.
2. Run the following commands and collect the output:
   - debug system show cpu status
   - show cpu average
   - debug system ps
   - debug system top iterations 3
3. Ensure you save the command outputs into a log file. For example, if using PuTTY, enable logging with Session Logging and save it as putty.log.

Collecting data from these commands during the issue occurrence will help determine the cause of high CPU usage.