[9482] in North American Network Operators' Group
Re: QoS/CoS interest
daemon@ATHENA.MIT.EDU (Greg Soprovich)
Thu May 22 12:26:11 1997
Date: Thu, 22 May 1997 11:10:58 -0500
To: nanog@merit.edu
From: gsoprovi@MTS.Net (Greg Soprovich)
I have to agree with a lot of the comments that P Kavi made. My greatest
issue with any attempt at GOS is that one MUST be able to control ingress
traffic. Unless one can do so in a fairly clean manner, I don't see how it
will work in practice.
> * No policing at ingress: You can't have QoS unless
> you can limit how much traffic enters the network,
> and discard, or at least mark the excess traffic.
> * No effective Class of Service mechanism:
The support issue between ASes is, I believe, the largest one. I think
getting such a policy in place will dwarf the carrier agreement woes
between major Telcos. Can you imagine trying to build a common framework
for Qos/Cos across the majority of providers any time soon? The
administrative headaches will, I think, far outweigh any technical
issues...
> 3. No support across ASes. First of all, BGP provides no QoS
> metrics. So there is no way to determine if a particular AS
> should even be considered in setting up a QoS path. Second, while
> a single AS could be upgraded to QoS-capable equipment, a forklift
> upgrade across the Internet to QoS-capable equipment won't happen
> anytime soon.
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Greg Soprovich *
Manitoba Telephone System * Manitoba Telephone System
System Analyst * 1700 Ellice Ave
(204) 784-6549 * Winnipeg, MB
* R3C 3V6
Greg.Soprovich@MTS.MB.CA *
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