1. For use in a transport network having a first device of a first type communicatively coupled with a first device of a second type, and a second device of the first type communicatively coupled with a second device of the second type, a method comprising: a) receiving, by the first device of the second type, information about a newly added port associated with a transparent LAN segment, of the second device of the first type, the information including a set of labels, an identifier associated with the transparent LAN segment and an identifier of the second device of the first type in the context of the transparent LAN segment; b) at the first device of the second type, determining a send label for sending addressed data to the transparent LAN segment of the second device of the first type, wherein the send label is determined based on the set of labels and an identifier of the second device of the first type in the context of the transparent LAN segment; c) at the first device of the second type, determining a differentiator label based on a second set or labels and an identifier of the second device of the first type in the context of the transparent LAN segment; and d) at the first device of the second type, generating forwarding information associating the differentiator label with the send label.