[c-nsp] CEF fun in SXF

[Gert Doering]

Hi,

coming back to this...

On Fri, Dec 09, 2005 at 04:37:52PM +0200, Saku Ytti wrote:
>  When you see something like this in PFC boxes odds are FIB is not
> syncronized between PFC and MSFC. When there is no route in PFC,
> PFC punts packet to MSFC ratelimited to ~300pps or so, so that MSFC

... is there a way to influence the PPS rate for this rate limiting?

We recently ran into another interesting effect, where an out-of-memory
problem triggered "%FIB-2-FIBDOWN: CEF has been disabled due to a low 
memory condition." -- the box wasn't very busy anyway, so the MSFC should
have managed to keep up.  Instead, we saw packet loss like crazy, which
fits your description.

So it would have been nice to say "yes, we know the box will keep up
with the current load, and tonight we will reboot it" instead of having
to reboot at office hours...

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de