Re: (IPng 6939) Re: Reg: Quality of Service routing

Lloyd Wood <L.Wood@surrey.ac.uk> Tue, 22 December 1998 00:03 UTC

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Date: Mon, 21 Dec 1998 18:19:21 +0000 (GMT)
From: Lloyd Wood <L.Wood@surrey.ac.uk>
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To: Parag M Panse <parag@utdallas.edu>
cc: Masilamany Raguparan <ragu@krdl.org.sg>, "Raghu V.V.J Vadapalli" <iprsvp@yahoo.com>, routing quality <qosr@newbridge.com>, Internet Protocol <ipng@sunroof.eng.sun.com>, MultiProtocol Label Switching <mpls@external.cisco.com>
Subject: Re: (IPng 6939) Re: Reg: Quality of Service routing
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On Mon, 21 Dec 1998, Parag M Panse wrote:

> On Mon, 21 Dec 1998, Masilamany Raguparan wrote:
> 
> > Raghu,
> > 
> > | Do we need QoS routing if we have enough infinite (I mean 
> > | large ) bandwidth. 
> > | 
> > | From my poor knowledge:
> > | 
> > | We need QoS routing b'cos we have limited BW and we want 
> > | to give priority to QoS flows. If some one comes with 
> > | a Tx system which supports 100s Gb/s,(say 128 channel WDM system)
> > | Do we need to support the "special"  status for the QoS flows. 
> > 
> > Nature of the traffic can be very bursty and suck up your 100s of Gb/s
> > bandwidth easily at any given time slot. Therefore, having just large bit
> > pipes does not solve the QoS problem. 
> > 
> > Your delay = propagation time + queuing time + processing time equation
> > certainly works, if you have enough capacity left on the link at the time
> > of your request.
> 
> An implicit assumption that seems to be made here is regarding 'number of
> data sources'. 

A second assumption is that this is appropriate to all the lists it's
being cc'd to.

Followups set to qosr only; give those of us subscribed to all the
lists a break.

L.

<L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>