Switching Provider Edge Pseudo Wire Bifurcation
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Solution Overview
Problem
In existing networking systems, the process of pseudo wire protection switchover between customer edges is slow, and it consumes excessive network resources due to the need for single pseudo wire establishment and lengthy switchover procedures.
Innovation Solution
A method and system that enable a switching provider edge to establish multiple pseudo wires at a bifurcation position, using label mapping messages that include information about next hops or outgoing interfaces, allowing for faster protection switchover and resource optimization by establishing multiple pseudo wires from a single switching provider edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single pseudo wire is established between customer edges, then the network structure is simple, but the protection switchover time is long and reliability is reduced
Solution Approach 1:
The patent segments the pseudo wire establishment into multiple parallel pseudo wires (first pseudo wire and second pseudo wire) instead of using a single pseudo wire. This segmentation allows simultaneous establishment of multiple paths, enabling faster protection switchover when one path fails, thus reducing switchover time and improving reliability.
Solution Approach 2:
The patent establishes multiple pseudo wires in advance before failure occurs. The first pseudo wire is established as the primary path, and the second pseudo wire is established as a backup path. This preliminary action ensures that when the first pseudo wire fails, the second pseudo wire is already ready for immediate switchover, eliminating the need for time-consuming re-establishment.
2Speed
If multiple pseudo wires are established at bifurcation position, then protection switchover speed is improved, but device complexity increases
Solution Approach 1:
The patent introduces a switching provider edge (SPE) as an intermediary device at the bifurcation position that manages multiple pseudo wires. The SPE receives label mapping messages, determines bifurcation positions, and establishes multiple pseudo wires to different next-hop provider edges. This intermediary approach simplifies the complexity by centralizing the management logic at the SPE rather than distributing it across all customer edges.
Solution Approach 2:
The switching provider edge automatically determines when it is at a bifurcation position by analyzing the label mapping message, and autonomously establishes multiple pseudo wires without requiring manual configuration. The system self-services by automatically managing the complexity of multiple pseudo wire establishments, reducing the operational burden while maintaining high protection switchover speed.
3Loss of energy
If traditional pseudo wire establishment method is used, then the establishment process is simple, but network resources are wasted due to sequential switchover procedures
Solution Approach 1:
The patent merges the establishment of multiple pseudo wires into a single label mapping message processing operation. Instead of establishing pseudo wires sequentially through separate procedures, the switching provider edge processes one label mapping message to simultaneously establish multiple pseudo wires to different next-hop provider edges. This merging approach improves network resource utilization by eliminating redundant establishment procedures while maintaining ease of implementation through unified message processing.
Data Source
AI summary
A method, a system, and a device for establishing a pseudo wire are disclosed. The method includes: receiving, by a switching provider edge at a bifurcation position, a label mapping message, obtaining information of the switching provider edge at the bifurcation position and information of at least two next hops or outgoing interfaces of the switching provider edge through parsing, comparing the information of the switching provider edge at the bifurcation position with information of a local device, and if the information of the switching provider edge at the bifurcation position matches with the information of the local device, establishing at least two pseudo wires from the switching provider edge according to the information of at least two next hops or outgoing interfaces.