[c-nsp] cisco 6500 sup2 high load
adamk at sch.bme.hu
Sat Oct 2 18:52:07 EDT 2004
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:
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
More information about the cisco-nsp