SR Policy Route Matching Using Dynamic Node Identifier Updates
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Solution Overview
Problem
Existing methods for obtaining Border Gateway Protocol (BGP) router-IDs in network devices are either manual and inefficient or prone to performance bottlenecks, leading to delayed updates and poor network performance when router-IDs change.
Innovation Solution
Forwarding devices proactively send changed node identifiers, such as BGP router-IDs, directly to a controller, ensuring timely and accurate matching with target attributes in SR POLICY routes, thereby improving network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If node identity is transmitted through existing signaling messages, then implementation complexity is reduced, but the signaling messages become overloaded and existing protocols require complex modifications
Solution Approach 1:
The patent segments the node identity transmission function from existing signaling messages by introducing a dedicated dedicated signaling message type. This separates the identity transmission task from the general signaling protocol, avoiding message overload while maintaining implementation simplicity through standardized message formatting.
Solution Approach 2:
The patent introduces a dedicated signaling message as an intermediary carrier for node identity information. This intermediary structure allows efficient transmission without modifying existing protocols, as the dedicated message acts as a bridge between identity storage and communication requirements.
2Adaptability or versatility
If node identity is stored and transmitted using existing protocols, then protocol compatibility is maintained, but the existing protocols become overly complex and require extensive modifications
Solution Approach 1:
The patent makes the dedicated signaling message universal by designing it to work with existing protocol frameworks without requiring protocol changes. The message structure is compatible with current standards while providing the specialized function of node identity transmission, achieving multi-functionality without complexity.
Solution Approach 2:
The patent creates a simplified copy of the node identity transmission function through a dedicated signaling message that replicates the essential functionality without the complexity of modifying existing protocols. This copy approach maintains compatibility while reducing implementation burden.
3Quantity of substance
If a dedicated signaling message is introduced for node identity, then message overload is avoided and implementation is simplified, but new signaling protocols must be developed
Solution Approach 1:
The patent changes the parameter structure of signaling messages by introducing a dedicated message type with specific formatting rules. This parameter change allows efficient identity transmission without requiring fundamental protocol redesign, as the changes are contained within the message structure rather than the overall protocol architecture.
Data Source
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AI summary
Embodiments of this application relate to the communication field, and disclose a node identifier transmission method, a device, and a system, to reduce a limitation on delivery of an SR POLICY route and improve network performance. The method specifically includes: A forwarding device sends a node identifier to a controller. The forwarding device receives a first SR POLICY route from the controller, where a target attribute of the first SR POLICY route is the node identifier. The forwarding device determines that the node identifier matches the target attribute of the first SR POLICY route, and forwards a traffic packet according to the first SR POLICY route.