| 摘要 |
The invention relates to a method of supporting communication between a first network node (AH1) and a second network node (ISR1) of a communications network (KN), to the communications network, to the first and second network nodes, and to a switch controller for the second network node for carrying out the method. Between the second network node (ISR1) and one or more further network nodes (ISR2, ISR3) of the communications network, information about label resources is exchanged using a label distribution protocol (LDP), whereby the establishment of shortcuts, each of which is formed by a direct Layer 2 connection assigned to a Layer 3 forwarding relationship, is made possible between the second network node (ISR1) and the further network nodes (ISR2, ISR3).The first network node (AH1) is preconfigured with a set of label resources. The second network node (ISR1) manages the assignment of the label resources available for a connection between the first network node (AH1) and the second network node (ISR1) and preconfigured in the first network node (AH1). The second network node (ISR1) assigns to a shortcut one of the labels from the set of label resources which are available for the connection with the first network node (AH1) and are preconfigured in the first network node (AH1), thus extending this shortcut through the second network node (ISR1) to the first network node (AH1). <IMAGE> |
