Transparent Bypass Mechanism for Network Traffic Management
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Solution Overview
Problem
Existing network bypass methods change network topology and routing behavior, leading to undesirable traffic changes and capacity issues, especially when traffic volume exceeds router capacity.
Innovation Solution
Implementing a packet-aware transport box that interfaces between the physical and higher layers to automatically configure a transparent bypass path by snooping path reservation messages and forwarding data frames without passing them through routers, while ensuring control frames are routed normally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a bypass path is configured to reduce traffic volume through intermediate routers, then router capacity utilization is improved, but network topology changes and routing behavior is altered
Solution Approach 1:
The system segments traffic into control frames and data frames, applying different routing behaviors. Control frames continue to traverse intermediate routers to maintain routing behavior, while data frames are diverted through the bypass path to reduce router capacity utilization.
Solution Approach 2:
The bypass mechanism acts as an intermediary path that handles only data traffic, allowing the separation of control plane and data plane traffic. This enables capacity relief for data frames while preserving the original routing topology for control frames.
2Quantity of substance
If data frames are diverted away from routers through bypass paths, then traffic volume through routers is reduced, but control frame routing may be affected
Solution Approach 1:
The system segments frames into control frames and data frames based on frame type identification. Data frames are diverted through the bypass path to reduce router traffic volume, while control frames are explicitly excluded and continue to traverse the normal routing path to maintain routing reliability.
Solution Approach 2:
Different quality of service is applied to different frame types: data frames receive the bypass treatment for capacity relief, while control frames receive standard routing treatment to ensure proper network operation and routing behavior.
3Productivity
If a transparent bypass path is implemented to handle increased traffic, then router capacity requirements are reduced, but device complexity increases
Solution Approach 1:
The bypass path is pre-configured with the same routing information as the original path using path reservation messages. This preliminary configuration allows the bypass to automatically handle data frames without requiring complex real-time routing decisions, reducing operational complexity.
Solution Approach 2:
The bypass path is created as a copy of the original routing path, inheriting the same routing information and path characteristics. This copying approach simplifies bypass configuration and ensures consistent routing behavior while enabling additional traffic handling capacity.
Data Source
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AI summary
A network component comprising at least one processor configured to implement a method comprising analyzing a path reservation message comprising a reserved path identifier, analyzing a plurality of frames each comprising a path identifier, and diverting at least some of the frames away from a router, wherein the path identifier in the diverted frames matches the reserved path identifier. Included is a system comprising a packet-aware transport box configured to receive a plurality of frames destined for a first router, snoop the frames, determine whether at least some of the frames should bypass the first router, and forward any frames that should bypass the first router to a second router without passing the frames to the first router.