1. A method of automatically configuring a Service Instance Identifier, I-SID, in a Generalized Multiprotocol Label Switching, GMPLS, controlled network, the method comprising the steps of: identifying a specific I-SID for a specific service in the GMPLS controlled network; and automatically configuring the identified I-SID within a Backbone Edge Bridge, BEB, with a Resource Reservation Protocol-Traffic Engineering, RSVP-TE, extension.