Quality of Service support plays a major role in the Next Generation Internet. QoS routing protocols must cope with service differentiation to enhance this support. This paper proposes a service aware QoS routing protocol, the Multi-Service routing, which is an extension to traditional intra-domain routing protocols. It proposes a new path selection policy that guides higher priority traffic through the shortest path and diverts lower priority traffic through longer paths when service

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... e degradation is foreseen. Simulations results shows that the proposed routing performs better than existing QoS routing and linkstate protocols. • Forwarding rule 1: Priority traffic if (pkt (i,t) ∈ ag sc (z 1 ) ) ⇒ hop (z,x) ← f l cache (z 1 ,xs ,−) ; f orward(xs, pkt (i,t) ) • Forwarding Rule 2: Non priority traffic over an non congestioned network • Forwarding Rule 3: Non priority traffic over a global congestioned network if (pkt (i,t) ∈ ag sc (z np) ∧ ns (i,C) ) ⇒ drop(pkt (i,t) )