Host Application Outbound Source Path Control
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Solution Overview
Problem
In data processing networks, existing systems lack the ability for host applications to control the selection of outbound source paths for data transmission, which can lead to suboptimal performance due to reliance on operating system-driven path selection, especially in scenarios requiring specific network interfaces or high bandwidth.
Innovation Solution
The network layer of a host computer allows applications to specify particular outbound source paths when establishing remote connections, enabling control over data transmission paths and creating private connections by using application-specified paths instead of operating system-supplied routes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operating system automatically selects outbound source paths based on availability and loading conditions, then the system maintains transparency and ease of operation for host applications, but the host application loses control over which specific network interface or path is used for data transmission
Solution Approach 1:
The system dynamically adapts between two modes: automatic OS-driven path selection for general transparency, and application-specified path selection when control is needed. The network layer program allows applications to override default behavior by specifying outbound source paths, creating a flexible hybrid approach that balances automation with user control.
2Reliability
If the host application specifies particular outbound source paths, then the application gains control over data transmission paths for improved performance and reliability, but the system complexity increases due to additional configuration requirements
Solution Approach 1:
The host application itself performs the path selection configuration rather than relying on external system configuration. The application specifies its own outbound source paths directly through the network layer program, eliminating the need for complex system-wide configuration mechanisms and reducing overall system complexity.
3Reliability
If multiple outbound source paths are available for data transmission, then the system provides increased bandwidth and reliability, but the host application cannot guarantee use of specific high-bandwidth paths without explicit specification
Solution Approach 1:
The host application pre-specifies the desired outbound source paths before data transmission begins. By declaring the intended paths in advance through the network layer program, the application ensures that high-bandwidth paths are used from the outset, eliminating the need for runtime path negotiation or monitoring.
Data Source
AI summary
An application program of a multi-homed host computer at a multi-homed Internet site specifies a destination IP address, a local network interface device and a local site gateway to the network layer of the host computer when establishing a remote TCP connection to the destination IP address, and then the network layer of the operating system of the host computer uses only this specified outbound source path for the remote TCP connection instead of an outbound source path from an operating system supplied routing table. This allows the host application to have control over its remote output paths and provides the host application with the ability to create private remote connections.