High CPU on Cisco CSS 11503

kevin-shaw · ‎07-19-2012

All,

I have a CSS that is consistently reporting high cpu utilization.

Name Slot Sub 5Sec 1Min 5Min

--------------------------------------------

CSS5-SCM-2GE F0 1 1 96% 65% 66%

It appears that the below process is to blame:

NAME ENTRY TID PRI total % (ticks) delta % (ticks)

-------- -------- ----- --- --------------- ---------------

tFlowMgrPktR 8ba01df0 50 82% ( 657) 86% ( 261)

Below is some info on the Keepalive configuration:

Maximum Configured Remaining Permitted

Class A: 2048 39 2009 1869

ICMP: 2048 0 2048 1869

TCP: 2048 39 2009 1869

SSL: 2048 0 2048 1869

HTTP: 2048 0 2048 1869

Class B: 512 140 372 372

FTP: 256 0 256 256

HTTP: 256 139 117 117

Script: 256 1 255 255

Use Output: (16) ( 0) (16) (16)

System(A+B): 2048 179 1869 1869

Can anyone provide any next steps?

Thanks in advance.

Kev

chrhiggi · ‎08-10-2012

Kev-

Get a TAC case opened for this. tFlowMgrPktR is the process that handles receiving packets. If it is high, either your packets/second, new sessions/second, or unknown/malicious packets are arriving to the CSS.

Regards,

Chris Higgins

TAC ANS Escalation

kevin-shaw · ‎08-10-2012

Chris,

Thanks for the reply. I did just that. But in the meantime, I took a trace the traffic and noticed some serious traffic, that did not require load balancing. I had the application developer move that process to an app server and the CPU cleared up, instantly. The image below shows the interface usage:

chrhiggi · ‎08-13-2012

Good to hear, thank you for the follow up Kevin!

Regards,

Chris Higgins