[j-nsp] Use cases for IntServ in MPLS backbones

[Saku Ytti]

Hey James,

> Yeah so not already using RSVP means that we're not going to deploy it
> just to deploy an IntServ QoS model. We also use DSCP and scrub it off
> of dirty Internet packets.

Have you considered full or short pipe? It would be nice if we'd
transport DSCP bits as-is, when we don't have to care about them.
Far-ends may be able to utilise them for improved UX if we don't strip
them.

-- 
  ++ytti