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тАО01-28-2009 11:14 PM
тАО01-28-2009 11:14 PM
High CPU Utilisation on 5308XL
Does anyone know if its possible to list the processes active on the switch and show which is consuming the cpu cycles?
Cheers
Matt Chan
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тАО01-29-2009 06:20 AM
тАО01-29-2009 06:20 AM
Re: High CPU Utilisation on 5308XL
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тАО01-29-2009 11:25 AM
тАО01-29-2009 11:25 AM
Re: High CPU Utilisation on 5308XL
My first thought was something in the environment, but spanning tree is stable, and the port utilisations are very low nothing is showing in the log, yet the cpu persists in extremely high usage.
I'm going to place a hardware call anyway as I'm having trouble seeing what else it could be.
Cheers
Matt Chan
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тАО01-29-2009 10:14 PM
тАО01-29-2009 10:14 PM
Re: High CPU Utilisation on 5308XL
(enable per task utilization)
# task-monitor cpu
then,
"# show cpu" should show you task specific usage. That can help you identify what might be consuming more cpu.
vishwas
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тАО01-30-2009 12:34 AM
тАО01-30-2009 12:34 AM
Re: High CPU Utilisation on 5308XL
I may have found the culprit though, it appears it may have been syslog traffic from a firewall to a syslog server which had become unstable and not accepting traffic, it appears the firewall sent something in the order of 56 GB of syslog data.
Strangely, neither of the the ports by which these devices were connected to the switch seemed to show unusual utilisation so I'm guessing it was many small packets (it appears there were 111 million packets. but the actual utilisation was very low.
Cheers
Matt Chan
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тАО01-30-2009 02:57 PM
тАО01-30-2009 02:57 PM
Re: High CPU Utilisation on 5308XL
Whats the firewall you have ?
if you can afford some downtime, then you will be having a choice to figure out whats happening by narrowing down the issue if its related to the environment
try after each of following points to monitor the CPU utilization:
- disconnect uplinks to other switches
- disconnect redundant links if you have.
- disconnect Firewall link.
- if you have left up with only end devices ports then it could be from one of these ports.
try also to syslog only Critical info.
Good Luck !!!