LDP LSP Fault Location Identification in IP RAN Networks
Solution Overview
Problem
In IP RAN networks, LDP LSP faults often go undetected due to the lack of intrinsic failure detection mechanisms, leading to inefficient troubleshooting as the location of the fault point is not accurately identified, causing difficulties in resolving issues quickly.
Innovation Solution
A method and device for processing location information of a fault point in IP RAN networks, where an ingress node and transit nodes obtain and send specific location information, including node and interface identifiers, to determine the fault point, enabling more efficient troubleshooting by providing precise location data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LDP LSP tearing process is initiated after fault detection, then the fault is detected and reported, but the location of the fault point cannot be accurately identified
Solution Approach 1:
The patent applies preliminary action by having upstream nodes collect and store location information (such as downstream node identifiers, interface information, and path details) before the LDP LSP tearing process is fully initiated. This ensures that when a fault occurs, the necessary location data is already available and can be immediately provided to the fault detection mechanism, enabling accurate fault location identification even as the LSP is being torn down.
2Productivity
If upstream nodes initiate LDP LSP tearing process, then the faulty LSP is cleaned up, but troubleshooting efficiency is reduced due to lack of specific fault location data
Solution Approach 1:
The patent implements feedback by having upstream nodes provide location information (including downstream node identifiers, interface details, and path routing data) back to the fault detection and management system during or after the LDP LSP tearing process. This feedback mechanism enables the system to accurately identify where the fault occurred, allowing for targeted troubleshooting and significantly reducing the time required for fault resolution compared to blind network scanning.
3Reliability
If no intrinsic failure detection mechanism is used, then the network maintains simplicity, but LDP LSP faults go undetected
Solution Approach 1:
The patent applies universality by leveraging existing LDP protocols and upstream node functions to serve dual purposes: both normal LSP establishment/maintenance and fault detection/location identification. Upstream nodes utilize their existing role in LDP signaling to also collect and provide location information for fault detection, eliminating the need for separate dedicated detection hardware or complex independent mechanisms while significantly improving fault detection reliability.
Data Source
Figure 1~2B
Figure 2C~2D
Figure 3~4
AI summary
Embodiments of the present invention provide a method and a device for processing location information of a fault point. The method includes: obtaining, by an ingress node of an LDP LSP, first location information of a fault point on a link traversed by the LDP LSP, where the first location information of the fault point includes an identifier of an upstream node of the fault point and an identifier of an interface that is connected to the fault point and located on the upstream node of the fault point; and providing, by the ingress node, the first location information of the fault point to a user so that the user determines a location of the fault point corresponding to an LDP LSP fault. By using the technical solutions of the present invention, the location of the fault point corresponding to the LDP LSP fault can be determined, and efficiency of troubleshooting specific to the LDP LSP fault can be improved.