Dynamic Bidi-LSP Binding Update via Request-Reply Packets
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Solution Overview
Problem
Current methods for setting up and managing bidirectional label switched paths (Bidi-LSPs) are inflexible and error-prone, especially as network size increases, due to reliance on static manual configuration, which limits flexibility and feasibility.
Innovation Solution
A method and apparatus that utilize request and reply packets to dynamically update the binding relationship of associated Bidi-LSPs, with an operation flag indicating actions such as setup, removal, or change, allowing for dynamic management of Bidi-LSPs between source and destination nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static manual configuration is used to set up Bidi-LSP, then the binding relationship can be established between forward LSP and backward LSP, but the configuration workload increases and errors increase as network size grows
Solution Approach 1:
The system performs self-configuration through automatic binding relationship establishment. The source node automatically binds the forward LSP and backward LSP based on received RSVP-TE messages, eliminating the need for manual configuration at both source and destination nodes. This self-service mechanism reduces configuration workload and errors while maintaining reliable binding relationships.
Solution Approach 2:
The binding relationship is established preliminarily during the LSP setup process itself. When the source node receives the RESV message containing backward LSP information, it immediately performs the binding operation automatically, rather than requiring separate manual configuration steps later. This preliminary action integrates binding establishment into the natural LSP setup flow.
2Adaptability or versatility
If manual configuration is used to remove or change Bidi-LSP binding, then the binding relationship can be managed, but flexibility and feasibility are low
Solution Approach 1:
The system implements dynamic Bidi-LSP management through automated binding establishment and modification. The source node can dynamically bind or unbind LSPs based on real-time network conditions and received messages, allowing flexible adaptation without rigid manual reconfiguration. This dynamic approach significantly improves both flexibility and operational ease compared to static manual methods.
Solution Approach 2:
The destination node sends RSVP-TE messages containing backward LSP information back to the source node, providing feedback that enables automatic binding relationship establishment. This feedback mechanism allows the system to adapt and manage Bidi-LSPs flexibly based on actual network state, eliminating the need for manual intervention while improving operational ease.
3Reliability
If static configuration method is used, then the associated Bidi-LSP can be established, but the method is error-prone and inflexible as network size increases
Solution Approach 1:
The source node automatically performs binding relationship establishment based on received RSVP-TE messages, eliminating manual configuration operations. This self-service approach ensures consistent and error-free binding while significantly improving configuration efficiency, especially in large-scale networks where manual operations become increasingly error-prone and time-consuming.
Solution Approach 2:
The patent replaces manual mechanical configuration operations with automated message-based processing. Instead of operators manually configuring binding relationships, the system uses RSVP-TE message exchange and automatic processing at the source node to establish and manage bindings, thereby improving both reliability and productivity.
Data Source
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AI summary
Embodiments of the present invention provide a method for updating a binding relationship of an associated bidirectional label switched path (Bidi-LSP). The method includes: sending a request packet to a destination node, where the request packet carries a parameter for updating the binding relationship and is designed to request updating of the binding relationship; receiving a reply packet from the destination node, where the reply packet carries a binding updating processed result and is designed to respond to the request packet; and updating the binding relationship of the associated Bidi-LSP according to the binding updating processed result carried in the reply packet.