Originally Posted by James Henry

It all depends really on what the score is with them. With the advent of traffic shaping you can set TOS bits on the traffic and use it with an MPLS / diffserv aware network to cause different routing behaviours depending on the type of traffic.

In ntl's core traffic uses IS-IS and MPLS LSPs for routing traffic. IS-IS on th e ntl core runs solely based on metrics assigned to interfaces and LSPs appear to be set statically. It is possible to set TOS bits / use diffserv to send traffic down different LSPs.

That said I very very much doubt that ntl are doing this ;) The tech support guy is, of course, making this up.