topic RE: cpu utilization for new switch in ExtremeSwitching (EXOS/Switch Engine)

cpu utilization for new switch

Gaurav_Madan — Fri, 08 Jul 2016 14:54:00 GMT

Hi

We have a new switch and it shows as follows :

sh cpu-monitoring

CPU Utilization Statistics - Monitored every 5 seconds
-----------------------------------------------------------------------

Process 5 10 30 1 5 30 1 Max Total
secs secs secs min mins mins hour User/System
util util util util util util util util CPU Usage
(%) (%) (%) (%) (%) (%) (%) (%) (secs)
-----------------------------------------------------------------------

System 5.5 5.3 5.1 5.1 5.0 5.1 5.1 99.9 1492.62 62333.95
aaa 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.0 11.35 14.54
acl 0.1 0.0 0.1 0.1 0.1 0.1 0.1 3.3 576.56 1129.24
bfd 0.0 0.0 0.0 0.1 0.1 0.0 0.0 2.6 154.27 224.24
bgp 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.00
brm 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.00
ces 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.3 0.16 0.06
cfgmgr 0.0 0.0 0.0 0.0 0.0 0.1 0.1 5.9 91.84 41.25
cli 0.1 0.0 0.0 0.5 0.1 0.3 0.2 46.3 38.72 18.30
devmgr 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21.9 25.00 9.01
dirser 0.0 0.0 0.0 0.1 0.0 0.0 0.0 50.0 0.37 0.66
dosprotect 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.5 0.17 0.05
dot1ag 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.6 5.79 7.25
eaps 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.3 0.60 0.39

Any idea why 99.9% cpu util was caused here ?

version running :ExtremeXOS version 15.6.4.2

It has 4 links up with very less traffic .

Thanks
Gaurav Madan

RE: cpu utilization for new switch

Ron_Huygens — Fri, 08 Jul 2016 15:49:00 GMT

The 99.9% in the max column means that there was a moment in the history that the CPU spiked to 99.9%
The current reading does not show any high CPU usage.

https://gtacknowledge.extremenetworks.com/articles/Q_A/Difference-between-Top-and-show-cpu-monitorin...

RE: cpu utilization for new switch

Gaurav_Madan — Fri, 08 Jul 2016 21:43:00 GMT

Hello Ron ,
I do understand that .. What I am wondering is that what could have caused cpu spike at 99.9 % when there is very minimum config and data traffic passing through switch

RE: cpu utilization for new switch

Drew_C — Fri, 08 Jul 2016 21:43:00 GMT

It's possible that information still exists in the log (show log) that can show which process spiked the CPU. It depends on the amount of log messages you receive and how long ago this happened.
You can use the clear cpu-monitoring command to reset these values.