RE: QoS attributes

[<Pasi.Eronen@nokia.com>]

Hi,

I think at least some people are intending to use the bandwidth
RADIUS attributes for configuring some sort of "bandwidth
limiting" mechanism in a WLAN access point. This is very different 
from QoS signalling for, e.g., reserving bandwidth along the route 
to some destination.

I agree with John in that using AAA protocols for QoS signalling
is not a good idea; however, using them to provide parameters
for some "bandwidth limiting" mechanism seems very appropriate. 

Diameter even provides an AVP data format (QoSFilterRule) for 
exactly this purpose. It seems that this AVP data format is 
not yet used by any AVP type, though. It is quite complex, so 
perhaps something like a simple "maximum uplink/downlink bandwidth" 
attribute would be sufficient for many purposes.

BTW, it seems the actual text describing the "dscp" and "metering"
options is missing from RFC 3588. The latest draft that still
explains their parameters seems to be -09, available from:
http://www.watersprings.org/pub/id/draft-ietf-aaa-diameter-09.txt

Best regards,
Pasi

> -----Original Message-----
> From: owner-radiusext@ops.ietf.org On Behalf Of ext Avi Lior
> Sent: Monday, January 05, 2004 6:18 PM
> To: Loughney John (Nokia-NRC/Helsinki); rrroy@att.com;
> jari.arkko@piuha.net; Madjid.Nakhjiri@motorola.com
> Cc: Avi Lior; radiusext@ops.ietf.org
> Subject: RE: QoS attributes
> 
> 
> Good question John,
> 
> Well what do you call Bandwidth attributes and transporting them?
> We are certainly talking about tranpsorting Bandwidth parameters in
> a RADIUS message.  It certainly makes sense to me to include
> Bandwidth attributes as part of the authorization of a given
> service.
> 
> Is Bandwidth part of QoS?  I think it is.
> 
> 
> > -----Original Message-----
> > From: john.loughney@nokia.com [mailto:john.loughney@nokia.com] 
> > Sent: Sunday, January 04, 2004 3:52 AM
> > To: rrroy@att.com; jari.arkko@piuha.net; Madjid.Nakhjiri@motorola.com
> > Cc: avi@bridgewatersystems.com; radiusext@ops.ietf.org
> > Subject: RE: QoS attributes
> > 
> > 
> > Roy, Avi,
> > 
> > I am getting quite confused by this discussion.  Could I ask what 
> > we are actually discussing?  RADIUS/Diameter are not 
> > signaling protocols, they are AAA protocols.  RADIUS/Diameter 
> > should not transport QoS information.  My expectation is that 
> > they would be involved in authorization for QoS for some 
> > services, but doing more would seem to be out of scope for 
> > AAA protocols.
> > 
> > Am I missing something?
> > 
> > John


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