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Cisco 3750 High CPU Load

andreribeiro
Level 1
Level 1

Hello,

 

I'm facing a big issue with my stack of two members os 3750E.

The CPU is so high but there is any process consuming the CPU as you can see bellow.

 

#sh processes cpu sorted
CPU utilization for five seconds: 96%/84%; one minute: 96%; five minutes: 94%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
90 905211 169354 5345 1.80% 1.54% 1.51% 0 RedEarth Tx Mana
179 1348764 988489 1364 1.47% 1.19% 1.16% 0 Hulc LED Process
134 440167 43981 10008 0.98% 0.90% 0.87% 0 hpm counter proc
13 274848 360295 762 0.82% 0.77% 0.73% 0 ARP Input
229 163220 232279 702 0.32% 0.30% 0.27% 0 IP Input
390 3674 1492 2462 0.32% 0.03% 0.02% 5 SSH Process
247 124654 227296 548 0.32% 0.28% 0.28% 0 Spanning Tree
89 396288 233160 1699 0.32% 0.44% 0.51% 0 RedEarth I2C dri

 

I checked the CPU queu frames and in 5 minutes the difference doesn't seems unusual (image attached).

 

On logs nothing special.

Can someone give me an hint here?

Thank you

Model: WS-C3750X-24
Firmware Versoin: 15.0(2)SE11

19 Replies 19

andreribeiro
Level 1
Level 1

The missing image

Hello!

 

 

Are you sure you don't have any Debug running in your device? As a first step I recommend you to use "undebug all", aditionally can you provide me the output of the next commands in a txt file?:

 

show proc cpu detailed process fed | ex 0.0
show proc cpu sorted | ex 0.0
show log
show ver

-----Do not forget to rate/mark useful answers.----

 

Regards,

Hello Diana,
Thank you for replying.

 

The requested commands are on the file attached.

Thank you again for you availability.

Hello Andre thanks for the reply,

 

I also need this outputs:

 

show process memory

show platform tcam utilization

 

Best Regards,

Hi Diana,

Thank you.
The requested commands are attached.

 

 

On the other hand, 

 

Why do you have flapping in those interfaces? (2/0/16 and 2/0/24)? Is this flapp constant in your network?

 

Regards,

I really don't know.
On these 2 ports there are servers (in access mode) connected and are managed by other team.

Interface statistics attached.

It's strange because the interfaces not seen to have errors, what about the OSPF neighbor (10.42.201.250)? I could not find anything strange besides the logs among all the exits that you sent me. 

please provide me the next output:  show controllers cpu-interface

 

Regards,

Here is the requested output.

 

An important finding that we got recently is, we have a aggregator switch connected to this (another 3750) that when this switch has a high value of CPU load the other, the aggregator also have the similar CPU load values).

 

I mean seems that is something that affect both switches and the aggregator switch doesn't "speak" OSPF.

The other neighbor is Firewall PaloAlto and we have around 40 implementations like that without any issue.

Good morning Andre,

 

II know the kind of implementation isn't the problem, but in the logs you provide me there are a lot of logs that indicate flapping with this neighbor and that is not a healty behavior in your network, maybe the constant change in the neighbord ststus is giving you problems. You should review why this is happening.

---Do not forget to rate useful post.---

 

Regards,

There are 2 versions of IOS that Cisco recommends to all users

 

Early Deployment (ED)

Software releases that provide new features and new platform support in addition to bug fixes.

 

Maintenance Deployment (MD)

A Cisco software release that provides bug fix support and ongoing software maintenance.

 

Just download the newest version of IOS for the 3750switch & you should be good to go...

 

Copy the new IOS file from USB or TFTP to flash...

1 - software clean

2 - software install file flash:new IOS image

3 - reload

Leo Laohoo
Hall of Fame
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Post the complete output to the following commands:
1. sh version; and
2. sh proc cpu sort | ex 0.00
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