Re: Reg: Quality of Service routing

awduche@UU.NET (Daniel Awduche) Tue, 22 December 1998 00:17 UTC

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From: awduche@UU.NET (Daniel Awduche)
Message-Id: <QQfure13620.199812210538@neserve0.uu.net>
Subject: Re: Reg: Quality of Service routing
To: prz@dnrc.bell-labs.com (Antoni Przygienda)
Date: Mon, 21 Dec 1998 00:38:54 -0500 (EST)
Cc: ragu@krdl.org.sg, iprsvp@yahoo.com, qosr@newbridge.com, ipng@sunroof.Eng.Sun.COM, mpls@external.cisco.com
In-Reply-To: <367DAE12.F66AB40C@dnrc.bell-labs.com> from "Antoni Przygienda" at Dec 20, 98 09:10:26 pm
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Tony P. has captured the basic issues very nicely. 

The fundamental problem is that of resource management. 
Specifically, the controlled mapping of traffic onto network 
elements to achieve desired performance objectives. The
Internet being an economic system, the problem of resource
management will persist even as technology and terminology
evolve.

Constraint based routing (of which QoS routing is a subset),
allows the mapping of traffic onto network assets to be effected 
in a controlled fashion. Diffserv provides additional mechanisms 
for localized control.

In general, cost structure, revenue model, competition, and
other miscellaneous factors will impact optimization policy.

Even if bandwidth becomes cheap and plentiful, and we suppose 
no imaginative entrepreneurs exist to create new services that 
exploit this abundance (thereby creating a new cycle of demand), 
the issue of effectiveness concerning resource management will 
remain a significant aspect for many ISPs who must derive a 
return on their investment in infrastructure.

/Dan.

Antoni Przygienda said:
> 
> Let me bring the economical and philosophical component into this
> discussion 
> that I tried not to touch so far but probably needs being spelled out:
> 
> 1. Any amount of bandwidth can be thrown at the problem. 100 Gb/s on
> transmission media
> 	and beyond are not a dream but as CPU, bus & memory technologies taught
> us, 
> 	matter of years at most.