A method and device for managing E-tree services in an MPLS network having domains comprising network nodes and links, wherein the network is adapted to accommodate an E-tree structure formed by the network nodes for a specific E-tree service. The E-tree structure comprises a root point communicating with a number of leaf points, so that any network node of the E-tree structure is connected via its ports to links leading to a root point and/or a leaf point of said structure. The method comprises: marking ports of a specific node associated with links leading only to leaf points of the structure while marking differently ports of a specific node, associated with links leading to the root point; marking ports of a specific node connected to incoming or outgoing links of the same domain, and ensuring that traffic will not be returned thereby creating network loops.