Aggregation Node Pseudowire Routing Diffusion
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Solution Overview
Problem
In multi-segment pseudowire scenarios, existing methods for diffusing pseudowire routes increase the complexity and burden of access equipment by requiring an upgrade to the control plane from layer 2 to layer 3.
Innovation Solution
An aggregation node equipment receives non-routing protocol messages from access equipment, extracts or searches for pseudowire route information, and generates routing protocol messages to be sent to switching equipment, allowing the pseudowire route to be diffused without the access equipment needing to send routing protocol messages, thereby maintaining only the pseudowire route and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access equipment adopts IGP or MP-BGP messages to diffuse the pseudowire route, then the pseudowire route can be transmitted, but the complexity and burden of the access equipment increases due to requiring control plane upgrade from layer 2 to layer 3
Solution Approach 1:
The patent introduces an intermediary mechanism where the access equipment's pseudowire route information is extracted and re-encapsulated by network equipment (such as aggregation nodes or routing switches) that operate at layer 3. This intermediary process allows layer 2 access equipment to share route information without needing to upgrade their control planes, thus resolving the contradiction between reliable route transmission and equipment complexity.
Solution Approach 2:
The patent creates a copy of the pseudowire route information from the access equipment's layer 2 management protocol messages. This copied information is then re-encapsulated into routing protocol format by layer 3 capable equipment, allowing the original layer 2 equipment to remain simple while still achieving route diffusion through the copied and reprocessed information.
2Adaptability or versatility
If the access equipment upgrades control plane to layer 3 to support PW route diffusion, then route diffusion capability is achieved, but the burden on access equipment increases
Solution Approach 1:
The patent uses network equipment with layer 3 capabilities as an intermediary to perform the route diffusion function. This intermediary extracts pseudowire route information from layer 2 management messages and re-encapsulates it into routing protocol format, enabling route diffusion capability without requiring the access equipment itself to upgrade to layer 3, thus maintaining adaptability while reducing burden.
Solution Approach 2:
The patent segments the route diffusion function into two parts: the access equipment generates layer 2 management messages containing route information, and separate layer 3 capable network equipment handles the extraction and re-encapsulation into routing protocols. This segmentation allows the access equipment to remain simple layer 2 devices while the system as a whole achieves route diffusion capability.
Data Source
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AI summary
The embodiments of the present invention relate to the field of communications technologies, and provide a method and an aggregation node equipment for diffusing pseudowire routing. The method includes: receiving a non-routing protocol message sent by an access equipment, where the non-routing protocol message is an Access Node Control Protocol message; according to information carried in the Access Node Control Protocol message, obtaining a pseudowire route, and sending a routing protocol message carrying the pseudowire route to a switching equipment, so that the switching equipment diffuses the pseudowire route. The implementation of the embodiments of the present invention is capable of reducing complexity of the access equipment.