[c-nsp] cisco 6500 sup2 high load

[Brian Feeny]

Just for clarification, are you talking about ping times to and from 
the SupII itself,
or ping times measured thru the SupII?


On Oct 2, 2004, at 5:52 PM, Adam KOSA wrote:

>
> Hi everyone
>
> I'm asking for your help since i have no experience in finding out the
> cause of high loads.
>
> a cisco 6506 with sup2 is handling a giga ethernet line, and also 
> about 50
> smaller switches (all cisco).
>
> None of the lines are used above 70%, especially the gbit ethernet is
> never used over 40-50%.
>
> Today i recognised that normal ping times (<1.5 ms) are grown even to 
> 8000
> ms or above - only for a couple of minutes.  The ping time suddenly 
> clibs
> to 6000 ms, slowly increases to around 7000 ms, than crawling back to
> 700-900 ms.  After this, it jumps again up to 5000-7000 ms.  This whole
> process takes about 4-5 minutes.  Than, like everything is normal, it
> falls back to 0.5-1 ms.
>
> the 6500 show proc cpu is normal (4%), i never reach its interface.  
> the
> msfc2 is routing, the outside interface gives the pings above, i never
> reach the inside.  the msfc's show proc cpu is the following:
>
> Akiron#sh processes cpu
> CPU utilization for five seconds: 5%/4%; one minute: 46%; five minutes:
> 75%
>
> That 75% bothers me, but i don't know the reason.  This never happened
> before.  The only process which has >1% cpu usage is:
>
> PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
> 41     1018884   5980897        170  2.12%  4.78%  6.92%   0 IP Input
>
> which makes sense.  I still don't know what to do not to let this 
> happen
> again.  This incident occured several times during the past 48 hours 
> (3-4
> times).  During this mrtg shoved minimal traffic on the gbit link.
>
> Sorry for this long description, i just wanted to make sure i describe 
> the
> problem clearly, and english is not my native.
>
> thanks for any help
> Adam
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