Standby Node SID Protection for Unified SRv6 Failure Recovery
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Solution Overview
Problem
Existing failure protection technologies in Segment Routing (SR)/Segment Routing Internet Protocol Version 6 (SRv6) networks require different approaches for intermediate and tail node protection, leading to difficulties in device deployment.
Innovation Solution
A method where a protection relationship is configured on a standby node, with SID information from a primary node being matched to generate a protection entry, allowing the standby node to forward messages according to this entry in case of primary node or link failure, ensuring consistent functionality with the original path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different technologies are used for intermediate node protection and tail node protection, then specific protection functions can be achieved, but device deployment becomes difficult
Solution Approach 1:
The patent merges intermediate node protection and tail node protection into a unified technology framework. Both protection types use the same mirror SID mechanism, where a standby node maintains a protection entry corresponding to a primary node's SID. This allows both intermediate and tail nodes to be protected using identical procedures, eliminating the need for separate technology stacks and simplifying device deployment while maintaining comprehensive failure protection coverage
Solution Approach 2:
The patent creates a universal protection mechanism that can serve both intermediate nodes and tail nodes. The mirror SID and protection entry structure are designed to be functionally equivalent for both node types, allowing a single technology solution to provide failure protection across the entire network path regardless of node position, thereby reducing deployment complexity while ensuring reliable protection
2Reliability
If new types of mirrored SID are defined for egress protection, then fast convergence can be achieved, but compatibility with old devices is reduced
Solution Approach 1:
The patent uses a mirror SID mechanism where the standby node creates a copied or mirrored version of the primary node's SID. This mirror SID is propagated through the network and allows traffic to be quickly redirected to the standby node upon failure. The copying approach enables fast convergence while maintaining compatibility because the mirror SID follows the same structural and protocol rules as traditional SIDs, allowing both new and old devices to process them using existing mechanisms
Data Source
AI summary
Provided are a failure protection method and apparatus, a storage medium, and an electronic device. The method includes: configuring a protection relationship on a standby node, wherein the protection relationship is configured to indicate an object to be protected by the standby node; receiving SID information advertised by a primary node, wherein the SID information at least includes: an SID network programming function type and an SID value; matching the SID network programming function type with an SID network programming function type of the standby node, matching the SID value with the protection relationship, and in a case where the SID network programming function type is successfully matched with an SID network programming function type of the standby node and the SID value is successfully matched with the protection relationship, generating a protection entry.