[c-nsp] Flow Control and 10GE interfaces

Gert Doering gert at greenie.muc.de
Mon Nov 23 11:31:15 EST 2009


Hi,

On Mon, Nov 23, 2009 at 04:05:16PM +0000, Phil Mayers wrote:
> >So indeed, flow control is not a panacea.  I agree with this :-)
> 
> An interesting wrinkle (to some) is that stock flow control is not QoS 
> (i.e. 802.1p codepoint) aware - it's all-or-nothing, meaning your 
> low-bandwidth diffserv/EF flow gets paused as well as your less-then 
> best-effort 999.9mbit/sec FTP transfer :o(

Oh.  Even better point.  So yes,  flow control definitely needs to be
activated with care.

"Big buffers" is it, then :-) - plus "big pipes!".

gert
-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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