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New Member

CPU Utilization

Hi All,

One of our LRE switch CPU utilization always goes up to 95% and because high CPU utilization, HPOV kicks ticket very often.

After reloading switch everything is becoming normal for couple of hours

Reloading becomes work around solution for us

I have noticed that ?LRE Control Chan? is using excessive usage of CPU

22 38684320 2088856 18519 58.12% 55.14% 56.89% 0 LRE Control Chan

So, if you have any suggestion and recommendation for this problem please revert back to me ASAP.




Re: CPU Utilization

Well, what version of IOS is your switch running?

Check for any possible bugs or major problem in your current code and see if you require an upgrade.

Please let me know your feedback,


New Member

Re: CPU Utilization

We are running 12.1(11)YJ3 in some of our switches including this one but others are working fine.

So that is why i have not check realease notes for the same.


sd#show ver

Cisco Internetwork Operating System Software

IOS (tm) C2950lre Software (C2950lre-I6L2Q4-M), Version 12.1(11)YJ3, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Mon 24-Mar-03 13:37 by antonino

Image text-base: 0x80010000, data-base: 0x8057C000

ROM: Bootstrap program is C2950lre boot loader

stdwestgrand01mdfp1lred uptime is 3 days, 21 hours, 30 minutes

System returned to ROM by power-on

System image file is "flash:c2950lre-i6l2q4-mz.121-11.YJ3/c2950lre-i6l2q4-mz.121-11.YJ3.bin"

cisco WS-C2950ST-24-LRE (RC32300) processor (revision C0) with 44832K bytes of memory.

Processor board ID FHK0723Q004

Last reset from system-reset

Running Enhanced Image

2 Gigabit Ethernet/IEEE 802.3 interface(s)

24 Long Reach Ethernet interface(s)

The password-recovery mechanism is enabled.

32K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address: 00:0B:60:7A:E7:00

Motherboard assembly number: 73-7805-10

Power supply part number: 34-0039-01

Motherboard serial number: FOC07170BX4

Power supply serial number: PHI0714014G

Model revision number: C0

Motherboard revision number: A0

Model number: WS-C2950ST-24-LRE

System serial number: FHK0723Q004

SFP Module Board Assembly Part Number: 73-7757-02

SFP Module Board Revision Number: A0

SFP Module Board Serial Number: CAT07190R3L


Configuration register is 0xF



Please help me out as i do not have any clue about this issue.

New Member

Re: CPU Utilization

please help me out from this problem.


Re: CPU Utilization


Below you can find the troubleshooting steps:

1- Upgrade to the latest IOS. You current IOS is no more downloadable.

2- Check the ports status and check if there is high traffic on any port, or anything that is above usual limit and try to shut this port and see if the CPU drops

Let me know if the above works,


New Member

Re: CPU Utilization

Hi Mohammad/ALL,

May I know the reason for upgrade, I know its sounds like silly but my management would ask me the same question? Without finding any problem with current IOS how can we proceed for Upgrade?

It?s a LRE switch and could you please tell me the commands thru which I can find load on ports on LRE switch? Please advice.

Your valuable feedback will be highly appreciated.



New Member

Re: CPU Utilization

Please help me on this problem

New Member

Re: CPU Utilization

I am waiting for ur feedback...

New Member

Re: CPU Utilization

pls help me out


Re: CPU Utilization


I don't want to put assumptions. I honestly have minimal experience on LRE switches. If you feel this is of high priority issue then I advice you open a ticket with Cisco and send them the show tec so that they can look into the problem.

Usually, when I have these kind of problems I first eliminate the software by upgrading the IOS. Therefore, the upgrade may not fix the problem but I take this step just to eliminate software issue.

Sorry for this limited support,


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