North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: The Qos PipeDream [Was: RE: Two Tiered Internet]
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 Attachment:
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