Re: High CPU Utilization

Hello,

Thanks for your replies Guys.

I have now worked out what the problem was: I had configured the native VLAN
on the trunks as an unused VLAN to prevent VLAN hopping but I had not
actually configured the VLAN on the switches at each end of the trunks. Once
I did this the CPU utilization went right down:

CPU utilization for five seconds: 6%/0%; one minute: 5%; five minutes: 5%
 PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
 319 6250 1492 4189 0.47% 0.03% 0.18% 5 SSH
Process
   4 371297 32106 11564 0.47% 0.11% 0.11% 0 Check
heaps
 191 188562 442160 426 0.31% 0.08% 0.05% 0 IP
Input
  92 1081515 1783874 606 0.15% 0.01% 0.00% 0 hpm main
process
   5 74 1025 72 0.00% 0.00% 0.00% 0 Pool
Manager

The reason I configured it this way is that I had done so before but only
between switches and ESX hosts without any issues.

In this case the switch was performing fine: routing, spanning-tree etc. but
obviously I was concerned about the high CPU usage.

Thanks again for your replies

Jezz

On Sat, Jan 22, 2011 at 9:37 PM, <istong_at_stong.org> wrote:

>
> Any spanning tree issues going on? What's the output from
> show spanning, etc
> Are you using vtp?
>
> Ian
>
> > Hello All,
> >
> > I am seeing very high CPU utilization on a stack of 2 x
> > 3750s:
> >
> > CPU utilization for five seconds: 99%/14%; one minute: 99%
> > ; five minutes: 99%
> > PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min
> > TTY Process
> > 270 167303594 789523 211909 77.53% 79.32% 79.49%
> > 0 VLAN Manager
> >
> > 200 1108075 875272 1265 0.62% 0.57% 0.56%
> > 0 Spanning Tree
> > 36 122992 4860 25306 0.46% 0.05% 0.00%
> > 0 Per-minute Jobs
> > 96 245844 341634 719 0.30% 0.11% 0.12%
> > 0 hpm counter proc
> > 4 360969 31240 11554 0.30% 0.13% 0.11%
> > 0 Check heaps
> >
> > The VLAN Manager process appears to be the culprit using
> > approx 79% - does anyone have any idea why this might be
> > happening ?
> >
> > Thanks,
> >
> > Jezz
> >
> >
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Received on Sat Jan 22 2011 - 22:29:58 ART