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Originally Posted by Stuart C
Actually, if I remember my Cisco training, exactly what route IP packets take through the network can be governed by many things (speed and cost being two). However, you are right, It doesn't matter whether a packet is TCP or UDP, it still follows the same routing rules.
---------- Post added at 13:04 ---------- Previous post was at 13:02 ----------
It's also worth noting that most of the streams from NTL's Broadband Plus package may not work properly without UDP.
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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.