| 摘要 |
In prior art, the provision of back-up circuits for ATM cells in ring-type structures is efficiently controlled using linear structures. According to t he invention, this function is extended to ring-type MPLS network architectures as follows: linear MPLS structures are formed into a ring-type MPLS structur e and two unidirectional MPLS connections which respectively connect the same switching devices and run in opposite directions are logically associated to one another, whereby the operating link and the back-up link are routed via different physical paths. |
