[c-nsp] OSM POS Latency

[kevin gannon]

The errors are clean on a "show controller". Is there
some form of error correction that might slow the packets
down but still allow the packet to be received fine ?

Thanks & Regards
Kevin

On 8/17/06, Peter Salanki <peter.salanki at bahnhof.net> wrote:
>
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> Try cleaning the fibers. But you should se errors somewhere if it was
> a bad/dirty fiber issue.
>
> 17 aug 2006 kl. 17.52 skrev kevin gannon:
>
> > We are running OSM-2OC12-POS-SI 's in 7600's on 121-26.E7.
> > We notice that some links run with a end to end latency of 4ms
> > while on the same box another link will have a latency of 1ms.
> >
> > The two links have similar traffic levels and the distance of the
> > links
> > is 40km vs 65km so the circuit length should not affect by this much
> > at least the latency.
> >
> > I have compared the configs and nothing seems different. Running out
> > of ideas of what the issue might be. I have checked the following:
> >
> > 1. CPU <1%
> > 2. Traffic levels equal on both links
> > 3. No CEF funnies a "sh ip cef exact-route <pos end A> <pos end B> "
> >    shows the traffic pointing out the correct interface. Traceroute
> > also
> > shows
> >    expected 1 hop path.
> > 4. No SDH errors seen on the "sh controller" during the problem.
> > 5. The links run over DWDM so changed them to clock internal both
> >     ends to ensure no clock slipage.
> >
> > Any ideas ?
> >
> > Thanks
> > Kevin
> > _______________________________________________
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>
> Sincerely
>
> Peter Salanki
> Chief Network Engineer
> Bahnhof AB (AS8473)
> www.bahnhof.se
> Office: +46855577132
> Cell: +46709174932
>
>
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