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.

************************************************************* 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 * * *************************************************************