Packet Header Scoping for Virtual Network Boundary Enforcement
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Solution Overview
Problem
Existing cloud infrastructure systems lack effective mechanisms to control packet flows across virtual networks, leading to potential security breaches and routing errors due to incorrect security policies or software bugs.
Innovation Solution
Implementing scoping data in packet headers to enforce packet flow rules, allowing network virtualization devices to determine and enforce permitted network boundaries, ensuring packets are only forwarded within authorized network boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet flow control mechanisms are added to virtual network devices, then security and routing accuracy are improved, but device complexity increases
Solution Approach 1:
The packet flow control mechanism is segmented into distinct components: scoping data extraction from packet headers, network boundary determination based on configuration information, and packet forwarding decisions. This modular approach allows each component to be optimized independently while maintaining overall security and routing accuracy.
Solution Approach 2:
Network boundary information is determined and stored as configuration information before packets arrive. When packets are processed, the scoping data is extracted and compared against pre-determined boundaries, enabling rapid forwarding decisions without complex real-time calculations, thus improving security while managing device complexity.
2Manufacturing precision
If scoping data is extracted and enforced from packet headers, then routing accuracy is improved, but processing time increases
Solution Approach 1:
Scoping data is extracted directly from packet headers at the network virtualization device. This extraction process is optimized to retrieve only the necessary boundary information needed for routing decisions, minimizing processing overhead while ensuring routing accuracy by enforcing permitted network boundaries.
Solution Approach 2:
The scoping data in packet headers is structured with specific parameters that directly map to network boundary definitions. By standardizing these parameters and pre-configuring boundary information, the device can perform rapid parameter matching and comparison operations, improving routing accuracy while maintaining efficient processing speeds.
Data Source
AI summary
Techniques for controlling packet flows are described. In an example, a packet is sent on a virtual network. The packet's header includes scoping data that indicates a network boundary within which the packet is permitted and/or prohibited to flow. A network virtualization device of a substrate network receives the packet. The network virtualization device determines the scoping data from the header and, based on network configuration information, determines the forward flow of the packet. If the forward flow falls within a permitted network boundary indicated by the scoping data, the network virtualization device sends the packet forward. Otherwise, the packet is dropped.