Alcatel Alcatel Alcatel Alcatel The objective of this draft is to propose an IP service model for a non-packet switch capable optical network where G.LSPs are dynamically triggered by the IP layer and subsequently advertised for IP routing. The business model assumes that several IP service domains, some of which represent different administrative entities, share the same optical backbone and focuses therefore primarily on an overlay model. G-MPLS signaling (refer to [g-mpls]) with UNI support is assumed as underlying control plane protocol.