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Re: QoS/CoS in the real world?

  • From: Marshall Eubanks
  • Date: Sat Jul 13 19:58:10 2002

On Sun, 14 Jul 2002 00:46:31 +0100 (BST)
 "Stephen J. Wilcox" <steve@opaltelecom.co.uk> wrote:
> 

Boy, this is what people are always telling me about multicast!
(Except I never hear about ATM being popular.)
And I've heard the same about IPv6.

Has the Internet really fallen into old age so rapidly ?

Regards
Marshall Eubanks


> Well, end of the week and the responses dried up pretty quickly, I think
> thats a
> response in itself to my question!
> 
> Okay, heres a summary which was requested by a few people:
> 
> Other people too are interested in my questions, they dont implement QoS in
> any
> saleable manner and wonder how it can be done and whats actually required. 
> 
> A number of people think QoS was interesting for a while but that its never
> either found its true use or is dead.
> 
> There are unresolved questions from a customer point of view as to what they
> are
> actually going to get, what difference it will make and how they can measure
> their performance and the improvements from QoS.
> 
> There is a real demand for guaranteed bandwidth, however this tends to be in
> the
> form of absolute guarantees rather than improvements above "normal" hence
> ATM remaining a popular solution.
> 
> There is a requirement to differentiate voice traffic, however this is
> necessarily done by the network anyway in order to offer the service, this
> being
> the case the customer doesnt pay extra or gets to know much about how all the
> fancy bits are done.
> 
> 
> On the face of it this is all negative. Nobody has responded saying there are
> genuine requirements for services to be offered to customers. Nor has anybody
> responded with any descriptions of implementations.
> 
> I conclude either the people doing this are successful and keep their secret
> safe or the world is yet to sell largescale QoS across IP.
> 
> Steve
> 
> 
> On Mon, 8 Jul 2002, Stephen J. Wilcox wrote:
> 
> > 
> > Hi all,
> >  I've been looking through the various qos/cos options available, my
> particular
> > area was in how IP (MPLS perhaps) compares and can be a substitute for ATM.
> > 
> > Well, theres lots of talk and hype out there, from simple IP queuing eg
> cisco
> > priority queuing, rsvp, diffserv, mpls traffic engineering etc
> > 
> > But two things are bugging me..
> > 
> > 1. To what extent have providers implemented QoS for their customers
> > 
> > 2. Hype aside, to what extent do customers actually want this (and by this
> I
> > dont just mean that they want the latest QoS because its the 'latest
> thing',
> > there has to be a genuine reason for them to want it). And this takes me
> back to
> > my ATM reference where there is a clear major market still out there of ATM
> > users and what would it take to migrate them to an IP solution?
> > 
> > Also, how are people implementing bandwidth on demand (dynamic allocation
> > controlled by the customer) solutions to customers
> > 
> > Cheers
> > 
> > Steve
> > 
> > 
> 
> 
> 
> 
> 
>