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10G switch drops traffic for a split second
- Subject: 10G switch drops traffic for a split second
- From: ler762 at gmail.com (Lee)
- Date: Wed, 30 Nov 2016 11:58:06 -0500
- In-reply-to: <[email protected]>
- References: <CAP5r2csgw-1AE1O5kgYtp57V_pcMqa=otGj+Bn-o+j1h0VYoBA@mail.gmail.com> <[email protected]> <CAP5r2ctOm1v8axHrUqMz5jcov2gdgJ7VD3bE=a4MCMUe0A3Vbw@mail.gmail.com> <[email protected]>
On 11/30/16, Mikael Abrahamsson <swmike at swm.pp.se> wrote:
> On Tue, 29 Nov 2016, TJ Trout wrote:
>
>> Is it possible to over run the buffers of a 320gbps backplane switch
>> with only 1.5gbps traffic? I think the switch is rated for 140m PPS and
>> I'm only pushing 100k PPS
>
> If your switch is the typical small-buffered-switch that has become more
> and more common the past few years, then the entire switch might have
> buffer to keep packets for 0.1ms or less. So if someone says "flow control
> off" for 0.1ms, depending on the implementation, you might then start
> seeing packet drops on all ports until that device turns flow control
> back on.
I always disabled flow control on the theory that VoIP & flow control
are incompatible.
just out of curiosity - anyone have it enabled? if so, why?
Lee