ASR-9K CPU troubleshooting
a.slastenov at gmail.com
Wed Apr 20 07:00:32 UTC 2016
You should check a log files during the time of high cpu load. ASR9K do most of the packet processing on NP.
High CPU load may happen during some control plane processing, like bgp neighbor flapping.
Отправлено с iPhone
> 20 апр. 2016 г., в 2:17, Micah Croff <micahcroff at gmail.com> написал(а):
> I've experienced similar behavior on other platforms as well. Sometimes
> the output of the box is not correct. We were able to prove this to the
> vendor by conducting experiments and graphing the CPU. One of the
> protocols they said "couldn't possibly be causing this" turned out to be
> the root of the problem.
> I live by one rule when troubleshooting:
> The box is a lie.
> On Tue, Apr 19, 2016 at 4:06 PM, Laurent Dumont <admin at coldnorthadmin.com>
>> It coincides with nothing else? More traffic? CPU increasing at regular
>> intervals every day without any obvious reasons is probably something worth
>> looking into!
>>> On 4/18/2016 2:14 PM, Scott Weeks wrote:
>>> --- regezos at gmail.com wrote:
>>> From: Rukka Pal <regezos at gmail.com>
>>> How do you guys troubleshoot high CPU utilization on the ASR-9K platform?
>>> Detailed guides are available for IOS platforms, but I can't seem to find
>>> anything useful for the ASR.
>>> The average line-card (0/0/CPU0: A9K-24x10GE-TR) CPU utilization of my
>>> routers is about 10%, however recently I have noticed that 3-5 times a day
>>> it increases to 40% and stays there for about an hour (20% spp + 10% netio
>>> + the rest).
>>> I know this is well withing the acceptable range, but I am the kind of
>>> person who likes to understand every change in his network and during the
>>> investigation I had to realize that I simply don't have the tools to
>>> troubleshoot the ASR CPU.
>>> On cisco: sho proc cpu
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