Network Node Aging Prevention via Hello Detection Flag
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Solution Overview
Problem
In RSVP-TE networks, the Hello detection mechanism can lead to network node aging when a node's Hello detection function is disabled, causing neighboring nodes to wait unnecessarily, leading to the suppression of refresh messages and potential node malfunction misinterpretation.
Innovation Solution
A method that analyzes whether a control plane has malfunctioned or simply exited the Hello detection function, adding a specific identification to interaction information to differentiate between malfunctions and intentional Hello detection disabling, allowing continued refresh messaging to prevent node aging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the Hello detection function is disabled to avoid malfunction detection, then the node can exit the detection function, but neighboring nodes will mistakenly interpret this as a malfunction and suppress refresh messages, causing node aging
Solution Approach 1:
The patent introduces a specific identification (flag) as an intermediary element in the interaction information. This flag acts as a mediator that communicates the node's intentional Hello detection disablement status to neighboring nodes, preventing them from misinterpreting it as a malfunction. The flag bridges the communication gap between the node's internal state and external perception, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The patent changes the parameter state of interaction information by adding a specific identification flag. This parameter change transforms the meaning of the interaction information from ambiguous (could indicate malfunction or intentional disablement) to explicit (clearly indicates intentional Hello detection exit). By modifying this parameter, the system resolves the contradiction allowing nodes to disable Hello detection without causing aging.
2Measurement precision
If neighboring nodes wait for a period before sending refresh messages when Hello messages are not received, then they can detect potential malfunctions, but this waiting period causes unnecessary node aging when the node is only disabling Hello detection
Solution Approach 1:
The patent applies preliminary action by having the node set the specific identification flag in the interaction information before disabling the Hello detection function. This preliminary marking ensures that when the node stops sending Hello messages, neighboring nodes can immediately recognize the intentional disablement through the pre-set flag, eliminating the need for waiting periods and preventing unnecessary aging while maintaining accurate malfunction detection.
3Stability of the object's composition
If refresh messages are suppressed during the waiting period to avoid disturbing a potentially restarting node, then the node can restart cleanly, but this suppression causes the node to age when it is only disabling Hello detection
Solution Approach 1:
The specific identification flag serves as an intermediary that prevents the unnecessary suppression of refresh messages. By communicating the intentional Hello detection exit status, the flag allows refresh messages to continue being sent even when Hello messages are not transmitted, thereby maintaining node activity and preventing aging while still allowing clean restarts when actually needed.
Data Source
AI summary
The embodiments of the present disclosure disclose a method, a device and a system for preventing network node aging. The method includes: analyzing whether a control plane of a first node exits a Hello detection function due to malfunction; adding a specific identification to first interaction information in the case that the control plane of the first node is not malfunctioned but exits the Hello detection function, the specific identification being used to indicate the state that the control plane is not malfunctioned but exits the Hello detection function; and sending the first interaction information to a second node neighboring the first node, so that the second node determines that the control plane of the first node is not malfunctioned but exits the Hello detection function via the specific identification, and continues to send a refresh message to the first node.