Ring network label switching path creation method, related equipment and communication system

Abstract

The embodiment of the invention discloses a ring network label switching path creation method, equipment and communication system. A method for creating a label-switched path in a ring network, comprising: a first node receiving a first Path message from a second node for creating a first label-switched path; assigning a first label to the first label-switched path; The second node sends the first Resv message carrying the first label; if the first node receives the second Path message used to create the second label switched path from the second node, and determines the second label switched path and the second label switched path The destination node of a label switched path is the same, and the first node, the second node and the destination node are in the same ring network, then the first node allocates the first label for the second label switched path, and sends a message carrying the first label to the second node The second Resv message. The solution of the embodiment of the present invention is beneficial to reduce the creation amount and maintenance complexity of the ring network label switching path.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for creating a ring network label switching path, related equipment and a communication system. Background technique [0002] Network availability is a crucial indicator for operators, and network availability directly affects the achievement of their Service Level Agreement (SLA, Service Level Agreement). [0003] The ring network protection mechanism is an important means to ensure high availability of the network. In order to realize communication and protection between nodes, two primary and secondary point-to-point (P2P, Point to Point) label switching paths (LSP, Label Switch Path) are created between every two nodes of the existing access ring network. [0004] LSP protection switching mainly adopts Wrapping or Steering mode. [0005] Practice has found that because the existing technology creates two primary and secondary point-to-point LSPs for ring netw...

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Problems solved by technology

[0005] Practice has found that because the existing technology creates two primary and secondary point-to-point LSPs for ring network protection between every two nodes connected to the ring network, as the number of nodes on the ring network increases, the number of point-to-point LSPs created by ring network protection The number will increase geometrically, and the control overhead of point-to-point LSP will be very large

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