High CPU in Cisco 3560 where all processes are showing on upper side

[Pavinder Singh]

Hi Guys,

We are seeing high CPU utilization in one of our sites where we have 3560 as our core switches. Generally both switches show high CPU but not on same time.

One thing in common is that almost all the processes add to this issue had it been one side i.e. STP, IGMP, IP Input etc we would have consider to check something but this is causing OSPF to break sessions with WAN routers and firewall.

Any clue what can be checked to fix this up?? 

IOS :- 12.2(53r)SE2

License Level: ipservices

[Leo Laohoo]

IOS :- 12.2(53r)SE2

That's not the IOS.  That is the Bootstrap version. 

What is the IOS?

[Pavinder Singh]

Hi Leo,

Sorry may bad.

IOS - 15.2(2)E3

[Leo Laohoo]

IOS version 15.X (on 3560G/E/X & 3750G/E/X appliances) and high CPU goes hand-in-hand.  

For stability purposes, unless there is a need to use 15.X due to feature requirement(s), I'd recommend using 12.(55)SE10 instead.

[Pavinder Singh]

Thanks Leo. We will consider this option too.