Network Interconnect Node Status Assignment for Failure Isolation
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Solution Overview
Problem
Node redundant network interconnects based on type III service interfaces fail to adequately handle network changes such as node failures, internal link failures, or external link failures, leading to potential propagation of failures between connected networks.
Innovation Solution
A method is introduced to determine an interconnect node status for establishing a forwarding path within a network system, where nodes are assigned active or passive statuses based on status information, allowing only active nodes to transmit service-based data, and enabling flexible reaction to network changes by prioritizing interconnect nodes and external links independently in each network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If node redundant network interconnect based on type III service interfaces is used, then network interconnect can survive node failure, but it cannot adequately handle network changes such as node failures, internal link failures, or external link failures
Solution Approach 1:
The patent implements dynamic status assignment where interconnect nodes can transition between active and passive statuses based on real-time network conditions. This allows the system to adapt to various network changes (node failures, link failures) by dynamically reconfiguring which nodes are active for data transmission, rather than relying on a fixed node redundant structure.
Solution Approach 2:
The invention changes the operational parameters of interconnect nodes by introducing status information (active/passive) that can be assigned and reassigned based on network conditions. This parameter change enables flexible reaction to network changes, allowing the system to handle not just node failures but also internal and external link failures by adjusting node statuses rather than being constrained by fixed type III service interface configurations.
2Reliability
If active service interface link changes due to network failure, then network can react to failure, but failure propagates to second network and service assignments become coupled
Solution Approach 1:
The patent segments the network interconnect operation by allowing each network to independently assign status information to its own interconnect nodes. This segmentation prevents failure propagation because when a failure occurs in one network, only that network's node statuses change, while the other network maintains its active nodes and continues operating without being affected by the failure or requiring to adapt its service assignments.
Solution Approach 2:
The system performs preliminary status assignment to interconnect nodes before failures occur, establishing which nodes are active and which are passive. This preliminary configuration allows the network to react to failures by simply maintaining or reassigning these pre-established statuses rather than requiring active service interface link changes that would propagate failures to the other network.
Data Source
AI summary
A method and network for determining an interconnect node for establishing a forwarding path for service based data within a network system. The method includes assigning, interconnect node status information to network interconnect nodes, wherein a network interconnect node to which a passive status is assigned is only allowed to transmit service based data between an external link and another interconnect node of the network, or between two other interconnect nodes of the network. Only a network interconnect node with active status is allowed to send or receive service based data to or from the network. The method includes determining, for a given service, an interconnect node with active status for establishment of a forwarding path including the interconnect node with active status and an external link, wherein the determination is based on the respective status information assigned to the network interconnect nodes for the service.