BGP-Triggered SBFD Session Creation for Dynamic Fault Detection
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Solution Overview
Problem
Conventional BFD session configurations are manually intensive, leading to configuration errors and increased workload, especially when a large number of sessions are involved, and they do not efficiently adapt to service changes or network scenarios.
Innovation Solution
A method that dynamically creates seamless bidirectional forwarding detection (SBFD) sessions based on Border Gateway Protocol (BGP) messages, allowing automatic configuration and deletion of sessions, reducing manual intervention and resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual static configuration is used for BFD sessions, then configuration precision can be controlled, but workload increases and configuration errors occur
Solution Approach 1:
The system enables automatic BFD session configuration through BGP route advertisement. The second communication apparatus automatically advertises BFD discriminator information via BGP messages, and the first communication apparatus automatically creates SBFD sessions based on received routes, eliminating manual configuration requirements while maintaining accuracy
Solution Approach 2:
The BFD discriminator information is pre-configured and stored in the communication apparatuses. When BGP routing is established, the discrimination information is automatically advertised and used to create SBFD sessions without requiring real-time manual intervention
2Ease of operation
If manual static configuration is used for BFD sessions, then configuration control is maintained, but operation and maintenance convenience deteriorates
Solution Approach 1:
The system performs self-configuration of BFD sessions through automatic advertisement of BFD discriminator information via BGP messages. The communication apparatuses automatically establish and maintain SBFD sessions based on routing changes, eliminating the need for manual configuration and simplifying operation and maintenance
Solution Approach 2:
The BFD session configuration transitions from static manual setup to dynamic automatic establishment. SBFD sessions are automatically created when BGP routes are received and automatically deleted when routes are withdrawn, allowing the system to adapt dynamically to network changes
3Reliability
If a large quantity of BFD sessions are configured, then fault detection coverage is improved, but negotiation time increases becoming a bottleneck
Solution Approach 1:
The patent extracts the BFD discriminator information advertisement function from traditional BFD protocol and integrates it into BGP routing messages. This allows BFD session parameters to be transmitted along with routing information, eliminating separate negotiation processes and reducing time overhead
Solution Approach 2:
The patent combines BFD session establishment with BGP route advertisement into a single integrated process. The SBFD session is automatically created when the BGP route is received, merging two previously separate operations into one unified action that reduces negotiation time
Data Source
AI summary
This application provides a fault detection method, an apparatus, and a system. The method includes: A transmit end apparatus includes, when sending a border gateway protocol BGP message used for advertising a route, a bidirectional forwarding detection discriminator BFD discriminator configured by the transmit end apparatus, to trigger a receive end apparatus to automatically create an SBFD session used for detecting reachability of a target object associated with the transmit end apparatus, where the target object may be a locator address or a next-hop address of the route.