Firepower: High CPU usage

jds5 · ‎09-15-2022

Hello,

We have observed a 100% CPU consumption on our firewall, FP2130 having caused side effects on production (loss of telephone connections among others...). Today everything seems to be stabilized.
I would like to know what caused it.

You will find attached the graph of the CPU on this FTD

BR,

José

Asmat Sulaiman · ‎09-15-2022

Hi,

Have you checked the interface stat for errors?

"show interface | include error"

Have you checked if there was any capture running. Even if they are paused, they still consume cpu cycles, you will have to remove the capture if that is running.

Also, I would check "show resource usage all" to check if there was any resources exceeded it's limit such as connection limit etc. This will give you some indication including DDOS attack, if you have SNMP monitoring tool, look at the stats during incident. Hope this help.