[c-nsp] 3750 12.2(44)SE1 CPU 5% weirdness

sthaug at nethelp.no sthaug at nethelp.no
Fri May 16 12:42:25 EDT 2008


> I assumed that to be the case because on the first 3750 that hit my
> lab, I configured the (unsupported on that platform) NetFlow data
> export and I seem to remember that I have seen *some* traffic, but
> it was just a very small trickle, orders of magnitude below the
> actual flows going through the box. I assumed that what I see are
> just the punts.

You saw traffic being CPU switched for some reason.

> Or was this the broken counters on SVIs? Damn LRU brain cache line
> dropping...

None of the 3550/3560/3750 family have functioning SVI counters -
the hardware to do it just isn's there.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no


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