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Re: The Qos PipeDream [Was: RE: Two Tiered Internet]

  • From: Marshall Eubanks
  • Date: Thu Dec 15 22:49:54 2005 
Hello Dave;

This won't open for me.

Do you have a pdf of these slides ?

Regards;
Marshall

On Dec 15, 2005, at 10:39 PM, David Meyer wrote:


On Thu, Dec 15, 2005 at 07:34:56PM -0800, David Meyer wrote:
On Fri, Dec 16, 2005 at 03:29:29AM +0000, Christopher L. Morrow wrote:
On Thu, 15 Dec 2005, John Kristoff wrote:


On Thu, 15 Dec 2005 19:15:49 -0500 (EST)
Sean Donelan <[email protected]> wrote:


AT&T, Global Crossing, Level3, MCI, Savvis, Sprint, etc have sold
QOS services for years. Level3 says 20% of the traffic over its
What do they mean by QoS? Is it IntServ, DiffServ, PVCs, the law of
I think also mostly this applies to private network things as well...
which mostly ends up being: "backups get 20% of the pipe and oracle-forms
gets 70%" (or some variation on that mix... what with 8 queues or whatever
on the private network you can just go to town :) )

Speaking to MCI's offering on the public network it's (not sold much) just
qos on the end link to the customer... It's supposed to help VOIP or other
jitter prone things behave 'better'. I'm not sure that we do much in the
way of qos towards the customer aside from respecting the bits on the
packets that arrive (no remarking as I recall). So, what does this get you
aside from 'feeling better' ?

averages or something else? I've had to deploy it on a campus network
and in doing so it seems like I've tread into territory where few if
any big networks are to be found. Nortel apparently removed DiffServ
most large networks (as was said a few times I think) don't really need it
in their cores. I think I've seen a nice presentation regarding the
queuing delay induced on 'large pipe' networks, basically showing that qos
is pointless if your links are +ds3 and not 100% full. Someone might have
a pointer handy for that?
	You might check slides 35-38 in

	 http://www.1-4-5.net/~dmm/sprintlink_and_mpls.ppt

	Dave