The MPLS WG Archive

[Grenville Armitage <gja@research.bell-labs.com>]

B/W isn't QoS.

B/W may become cheap(er), but the premium service will
be constrained jitter/loss (or predictable delay/loss, take
your choice of poison).

It isn't even clear that one can solely say "overprovision"
as the magic words to clear up jitter and loss. Realities
such as slow provisioning schedules and technology limitations
can cause your B/W growth to fall behind the demand growth,
creating congestion points.

Which suggests anything that helps distribute congestion points
(e.g. MPLS TE) and helps differentiate traffic at congestion
points (e.g. Diffserv+MPLS) will find use.

cheers,
gja