[c-nsp] cisco 6500 sup2 high load
adamk at sch.bme.hu
Sat Oct 2 19:50:41 EDT 2004
On Sat, 2 Oct 2004, Brian Feeny wrote:
> Just for clarification, are you talking about ping times to and from
> the SupII itself,
> or ping times measured thru the SupII?
to the sup2. i never see though the sup2 while this happens. i'm also
not able to open an ssh connection to it, so i cannot mesure ping from the
sup2. before and after everything is normal.
> 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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