ADVA Optical Networking ADVA Optical Networking Juniper Networks Juniper Networks Juniper Networks Deutsche Telekom Deutsche Telekom Coriant GmbH Coriant GmbH Telefonica Ericcsson This memo is a companion document to [RFC4208]. It describes how the client domain networking in the overlay model can be enhanced via presenting to the client the network domain as an overlay topology made of Virtual TE Links.