Ethernet Security Unit for Bandwidth Integrity

The patent introduces a security unit as an intermediary component between the PHY unit and MAC unit. This security unit acts as a mediator that monitors and controls data streams passing through the Ethernet communications device, preventing compromised nodes from affecting network security while maintaining connectivity. The security unit extracts frame information, compares it with pre-defined policies, and manipulates data streams accordingly without disrupting normal network operations.

The security unit performs self-service by autonomously monitoring data streams, extracting frame information, comparing against policies, and taking corrective actions without external intervention. The system enables each Ethernet communications device to protect itself by implementing security functions locally at the device level, allowing individual nodes to independently identify and block malicious traffic while maintaining network-wide security.

The patent merges the security unit with existing Ethernet device components (PHY unit, MAC unit, or MII) to implement security functions without adding separate standalone security hardware. By integrating security capabilities into the existing data path infrastructure, the system enhances network security while minimizing increases in overall device complexity. The security unit leverages existing frame processing mechanisms already present in Ethernet devices.

The system performs preliminary action by pre-defining security policies before data streams are processed. These pre-defined policies establish security criteria in advance, allowing the security unit to quickly compare incoming frame information against established rules without requiring complex real-time analysis. This approach simplifies the security enforcement process while maintaining high reliability.