[c-nsp] 3850 and output drops

[Saku Ytti]

On 6 September 2016 at 19:58, Gert Doering <gert at greenie.muc.de> wrote:
> Maybe "the 3750 has reasonable buffers, while the 3850 is from the
> new regime of 'make it cheap, make small buffers' switches"...

http://www.cisco.com/assets/global/DK/pdfs/cisco_virtual_update_-_unified_access_c3850.pdf
https://people.ucsc.edu/~warner/buffer.html

Seem to support that 3750 has about half the buffers compared to 3850,
but double the queues.

Even in 3750 enabling 'mls qos' makes things far worse for bursty
packets, because you have less buffer for any specific queue, however
correctly configured QoS and 3750 outperforms with 'mls qos' compared
to without it.
I assume 3850 configuration needs some thought too, to best cope with
bursty traffic.

-- 
  ++ytti