Segment Identifier Routing for Multi-Homing Mirror Protection
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Solution Overview
Problem
In scenarios where single-homing and multi-homing coexist in IP network traffic forwarding, traffic interruptions occur due to incorrect mirror protection, causing packets to be discarded even when the link between network devices is not faulty, leading to unnecessary service disruptions.
Innovation Solution
A routing information processing method where a network device determines segment identifiers corresponding to single-homing and multi-homing devices, sending specific routing information to establish mirror protection only for multi-homed devices, ensuring that packets are routed correctly and avoiding traffic interruptions by distinguishing between single-homed and multi-homed network devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mirror protection is configured for all network devices in a single-homing and multi-homing scenario, then fault protection capability is improved, but traffic of non-faulty single-homed devices is interrupted
Solution Approach 1:
The patent applies local quality by differentiating mirror protection configuration based on device type: multi-homed devices receive mirror protection while single-homed devices do not. This is achieved by identifying whether a device is single-homed or multi-homed through routing information analysis, and then selectively applying mirror protection only to multi-homed devices, thus protecting against faults without interrupting traffic for single-homed devices.
2Device complexity
If routing information is simplified without segment identifiers, then device complexity is reduced, but traffic loop prevention and fault detection capability deteriorate
Solution Approach 1:
The patent extracts the essential protection functionality by separating mirror protection configuration from general routing information. Instead of including complete segment identifiers and locator information in all routing messages, the system extracts only the necessary mirror protection attributes for multi-homed devices, reducing routing information complexity while maintaining loop prevention capability through selective attribute inclusion.
Data Source
AI summary
A routing information processing method and apparatus. The method includes a first network device determines a first segment identifier corresponding to a second network device and a first locator. The first network device determines a second segment identifier corresponding to a third network device and a second locator. The first network device sends routing information that includes the first segment identifier and the second segment identifier. A fourth network device advertises mirror routing information specific to the first network device, where the mirror routing information includes the second segment identifier or the second locator.