[c-nsp] TCP Timer 70% CPU

[Xu Hu]

Is anyway we can see the tcp connections in the router through show tcp or something like that?

Thanks and regards,
Xu Hu

On 13 Aug, 2012, at 16:31, Chris Knipe <savage at savage.za.org> wrote:

> Hi,
> 
> Saw 4 sessions that was down and "sh tcp" showed thousands of
> connections in a CLOSEWAIT state to those neighbors.  I presume that's
> my culprit.
> 
> I shutted the neighbors that was down, but the connections are still
> in an CLOSEWAIT - looking now to see about resetting them.  CPU usage
> for the process is slowly starting to come down though, presumably the
> connections are timing out and not being re-created.
> 
> Many thanks,
> Chris.
> 
> 
> 
> On Mon, Aug 13, 2012 at 9:48 AM, Tim Warnock <timoid at timoid.org> wrote:
>>> I have a Cisco 3825 with 1GB Ram doing some BGP peering (VERY low
>>> traffic, not even 5mbit/s sustained throughput).  Memory usage is
>>> absolutely fine and sitting at less than 50% utilization, and stable.
>>> 
>>> The Router's CPU is showing an almost linear increases, and the 'TCP
>>> Timer' process is currently sitting at over 70% CPU load.  Cisco
>>> documentation suggests:
>>> TCP Timer
>>> 
>>> What can I look at possibly to determine root cause and fix?
>>> 
>> 
>> Hi Chris,
>> 
>> Any chance one of your BGP sessions are down?
>> 
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> 
> 
> 
> -- 
> 
> Regards,
> Chris Knipe
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