QoS Considered Harmful

Categories: VoIP.

Cringlely has an interesting take on QoS. What happens when the ISP tags the traffic for its own services to have a higher class of service than that of all those third party services? I’ve heard lots of arguments that best effort is good enough for VoIP if you have sufficient bandwidth. But that will fall apart pretty quickly if it has to compete with lots of higher priority traffic.

This could be the big ISP’s best shot ever at breaking that annoying end-to-end internet. Now, Cringely did not present any evidence the ISP’s were actually doing this–but I keep hearing more and more carrier-associated people claiming that VoIP is not deployable without QoS. This, in spite of all the services that work “well enough” without it.

(And yes, I just violated my on policy of not posting things already on slashdot again.)