On Fri, Dec 23, 2011 at 07:45:36AM +1100, John Elliot wrote:
> Thanks - Fairly certain we are seeing actual drops (And we are seeing
> packet-loss across this link)
I'm convinced you do. As has been previously discussed on this list: 2960- and
3560-series have catastrophically small output buffers.
Just to give you my personal experience: Two video streams (average <10 Mbit/s
each) manage to drop packets on the same outgoing ports when both send their
I-frames simultanously. In this particular setup the tweak mentioned below
actually "fixed" the problem.
> Gi1/0/17 is mapped to asic 0/20
>
> Gi1/0/17 17 17 17 0/20 1 17 17 local Yes Yes
>
> Port-asic Port Drop Statistics - Summary
> ========================================
>
> Port 20 TxQueue Drop Stats: 308277833
>
> And majority appear to be in Queue 1:
>
> So hoping someone can suggest a few tweaks to reduce these drops(And also
> (more importantly!) the packet-loss)
Replace by "real" ethernet switching hardware.
As an alternative: *If* you have the drops on some "output" ports where various
"feeder" ports send their data, then change the feeder ports from 1000-full to
100-full. If you have a more symmetric setup, see my real advice to replace the
hardware.
Sorry to have no better answer for you.
ciao
Jörg
--
Joerg Mayer <[email protected]>
We are stuck with technology when what we really want is just stuff that
works. Some say that should read Microsoft instead of technology.
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
