Ring network label switch path creation method and associated devices and communication system

Abstract

An embodiment of the invention discloses a ring network label switch path creation method and associated devices and a communication system. The ring network label switch path creation method comprises the steps of enabling a first node to receive first Path information coming from a second node and used for creating a first label switch path; distributing first labels for the first label switch path; sending first Resv information carrying the first labels to the second node; and if the first node receives second Path information coming from the second node and used for establishing a second label switch path, a destination node of the second label switch path and a destination node of the first label switch path are the same and the first node, the second node and the destination node are positioned on an identical ring network, enabling the first node to distribute the first labels for the second label switch path, and sending second Resv information carrying the first labels to the second node. According to the technical scheme, the ring network label switch path creation method is favorable for reducing creation quantity and maintenance complexity of ring network label switch paths.

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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