12-12-2013 07:13 PM - edited 03-07-2019 05:03 PM
Hi All,
I am seeing odd CPU utilization on Cisco switches.
The thing is when no body login to switch the CPU utilizationis around 55 - 58 %. ( Result from monitoring chart and when I login and check CPU, I can see the five min is around 57%)
As soon as I login to switch CPU utilization starts going down and reach to 8% slowly. This is huge difference.
Could someone explain why does this thing happen?
Solved! Go to Solution.
12-12-2013 08:45 PM
Hello,
You may be hitting the next bug:
High CPU when no Console/VTY activity
The bug is fixed in 12.2(58)SE1 and 12.2(55)SE3, or later releases.
Link
------
https://tools.cisco.com/bugsearch/bug/CSCth24278
Haihua
12-12-2013 07:25 PM
What IOS version?
12-12-2013 07:27 PM
Hi Leo
Its 12.2(55)EX2
12-12-2013 07:33 PM
What appliance is this?
When you are doing your monitoring, is it via SNMP?
12-12-2013 07:52 PM
Yeah it is via SNMP v2c. Its Cisco Prime Infrastructure 2.0
12-12-2013 07:57 PM
What is the model of the appliance running 12.2(55)EX2?
12-12-2013 09:05 PM
Hi Leo , they are 3560 Switches.
12-12-2013 09:30 PM
Hi Leo , they are 3560 Switches.
Stop playing games.
Standard 3560 (24- or 48-port) will not run EX2.
EXn-series IOS is an INTERRIM IOS. It is primarily designed to get your switch working and for you to upgrade the IOS.
I would recommend you upgrade to 15.0(2)SE4. Don't even consider upgrading to any of the version as you'll encounter more trouble.
12-22-2013 09:27 PM
Hi Leo,
Upgraded to 15.2(1)E1 which is latest.
High CPU is gone after upgrading to this version but now Memory is very high again.
See the attached screenshot.
Cheers
Zarni
12-23-2013 01:25 PM
Upgraded to 15.2(1)E1 which is latest.
High CPU is gone after upgrading to this version but now Memory is very high again.
Zarni,
Read all of my posts in this thread. I have never recommended this IOS version, 15.2(1)E1. I will NEVER recommend anyone use 15.2(1)E or 15.2(1)E1 because I know there are CPU and memory issues with this version.
12-23-2013 03:52 PM
12.2(55)EX3 resolved my issue mate.
For some reason ( Service Discovery Gateway ), I need to use 15.2 on others 3560s ( 48 Port proper switches ).
Cheers!
12-23-2013 04:00 PM
For some reason ( Service Discovery Gateway ), I need to use 15.2 on others 3560s ( 48 Port proper switches ).
I doubt it. There is no IOS verson 15.2 for plain 3560/3560G.
12-23-2013 07:05 PM
Hi Leo,
Thanks for reminding me.
Ya I forgot to mention that they are 3560X.
Cheers
Zarni
12-12-2013 08:45 PM
Hello,
You may be hitting the next bug:
High CPU when no Console/VTY activity
The bug is fixed in 12.2(58)SE1 and 12.2(55)SE3, or later releases.
Link
------
https://tools.cisco.com/bugsearch/bug/CSCth24278
Haihua
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