ONT Authentication via Embedded Switch Logic
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Solution Overview
Problem
Active Ethernet networks face challenges in securing optical fiber links due to the lack of effective authentication mechanisms, allowing unauthorized devices to access the provider network, which requires maintaining a RADIUS server and additional infrastructure.
Innovation Solution
An optical network aggregation device with an authentication unit manages ONT authentication by exchanging authentication messages with ONTs, using pre-programmed keys shared between devices to authorize access, thereby preventing unauthorized access without the need for a RADIUS server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IEEE 802.1X authentication standard is used to prevent unauthorized access, then network security is improved, but additional infrastructure (RADIUS server) and administrative overhead are required
Solution Approach 1:
The patent extracts the authentication functionality from the centralized RADIUS server infrastructure and embeds it directly into the optical network terminal device. The ONT now performs authentication operations locally using pre-stored credential information, eliminating the need for external authentication servers while maintaining security functionality.
Solution Approach 2:
The ONT device is configured with authentication credentials (username/password or digital certificates) and performs self-authentication with the optical Ethernet switch without requiring external authentication infrastructure. The device serves its own authentication needs independently, reducing administrative overhead and infrastructure requirements.
2Ease of operation
If loose coupling between ONT and optical Ethernet switch is maintained for ease of operation, then device compatibility is improved, but unauthorized devices can access the network
Solution Approach 1:
Authentication credentials are pre-configured in the ONT device before deployment. The device performs authentication operations before establishing network connectivity, ensuring that only authorized devices can access the network while maintaining compatibility with standard Ethernet interfaces.
Solution Approach 2:
The patent introduces an authentication message exchange as an intermediary step between the ONT and optical Ethernet switch. This authentication protocol acts as a mediator that verifies device authorization before allowing data transmission, securing the loose-coupled Ethernet interface without compromising compatibility.
Data Source
AI summary
In general, this disclosure relates to maintaining security between an optical network terminal (ONT) and an optical network aggregation device in an Active Ethernet network. An optical network aggregation device includes one or more optical Ethernet switches that can be adaptively configured to support authentication of one or more ONTs. For example, the optical network aggregation device may include a controller with an authentication unit for managing ONT authentication and an optical Ethernet interface for transmitting and receiving data over the optical network. The authentication unit may exchange authentication request messages via the optical Ethernet interface with an ONT and grant the ONT access to the provider network based on the exchange, thereby preventing rogue devices from gaining access to the provider network.