Network Policy Validation via Golden Traffic Flow Records
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Solution Overview
Problem
Current software-defined networking (SDN) architectures face challenges in cloud-native adoption due to complexity in life cycle management, scale limitations in configuration modules, and the lack of a command-line interface (CLI)-based interface, making it difficult to validate network policies efficiently and automate configuration in large-scale distributed applications.
Innovation Solution
A validation system that uses 'golden traffic' flow records to automatically validate updated network policies against intended packet flows, identifying discrepancies and configuration anomalies, thereby facilitating continuous deployment and integration within the SDN architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual network policy validation is used, then configuration accuracy can be maintained, but productivity and efficiency of network management deteriorate
Solution Approach 1:
The validation system performs automated self-validation of network policies by comparing actual packet flow records against expected flows. The system validates its own configuration without requiring manual intervention, thereby maintaining high configuration accuracy while significantly improving productivity and efficiency of network management.
2Productivity
If automated validation is implemented, then productivity improves, but device complexity increases
Solution Approach 1:
The validation system acts as an intermediary component that sits between network policy deployment and packet flow execution. It collects flow records from the network, compares them against expected behavior models, and reports discrepancies. This modular intermediary approach enables automated validation while keeping the overall system complexity manageable through clear separation of concerns.
3Reliability
If network policies are validated before deployment, then reliability improves, but time for configuration changes increases
Solution Approach 1:
The validation system performs preliminary validation of network policies against expected packet flows before the policies are deployed to production. By validating configurations in advance using collected flow records as a baseline, the system ensures policy correctness while enabling faster, more confident deployment cycles without time-consuming manual verification.
Data Source
AI summary
In an example, a validation system comprises processing circuitry having access to a storage device and is configured to obtain flow records indicative of packet flows among workloads deployed to a cluster of one or more computing devices configured with a network policy, wherein each flow record of the flow records indicates a corresponding packet flow was allowed or denied by the cluster; receive an updated network policy; determine whether a corresponding packet flow for a flow record of the flow records has a discrepancy with the updated network policy; and in response to determining the corresponding packet flow for the flow record of the flow records has a discrepancy with the updated network policy, output an indication of an error.