[e2e] Queue size of routers

RJ Atkinson rja at extremenetworks.com
Tue Jan 21 06:09:57 PST 2003

On Monday, Jan 20, 2003, at 22:33 America/Montreal, Vadim Antonov wrote:
> 3) because of smoothing of the flows, the probability of congestion in
> backbone circuits is relatively low

	A more direct and proximal cause for the low probability of backbone
link congestion is that most large ISPs deliberately over-engineer their
backbones to have visibly more capacity than the max offered load.  No 
of flow smoothing could counteract congestion caused by an absence of
over-provisioning of backbone links.

	(This was probably so obvious to Vadim that he forgot to mention it,
but it is not necessarily so obvious to folks who aren't in regular
touch with large ISP folks. :-)

rja at extremenetworks.com

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