nanog mailing list archives

Re: Link capacity upgrade threshold


From: "Aaron J. Grier" <agrier () poofygoof com>
Date: Tue, 1 Sep 2009 12:18:38 -0700

On Tue, Sep 01, 2009 at 11:55:45AM +0100, Paul Jakma wrote:
On Sun, 30 Aug 2009, Nick Hilliard wrote:
In order to get a really good idea of what's going on at a microburst
level, you would need to poll as often as it takes to fill the buffer
of the port in question.  This is not feasible in the general case,
which is why we resort to hacks like QoS to make sure that when there
is congestion, it is handled semi-sensibly.

Or some enterprising vendor could start recording utilisation stats?

do any router vendors provide something akin to hardware latches to keep
track of highest buffer fill levels?  poll as frequently/infrequently as
you like...

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | agrier () poofygoof com


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