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

[Marshall Eubanks <tme () multicasttech com>]

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 <sean () donelan com> 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