Multi-port Ethernet PHY Port Redirection via Multiplexed Datapaths
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Solution Overview
Problem
Multi-port Ethernet devices lack the ability to flexibly and independently assign receive and transmit data paths from any port to any Media Access Control (MAC) interface, limiting features like media conversion, cable extension, and port mirroring.
Innovation Solution
Implementing multiplexed datapaths and control logic within the multi-port Ethernet Physical (PHY) layer device to map each transmit data connection to any combination of MAC layers and each receive data connection independently to any combination of MAC layers and transmit data connections from other ports, enabling flexible configurations such as normal and port swap modes, failover switching, cable extension, media conversion, and various network topologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional multi-component designs are used in multi-port Ethernet PHY devices, then device structure is simplified, but functionality is limited and cannot support features like media conversion, cable extension, and port mirroring
Solution Approach 1:
The patent combines multiple Ethernet PHY ports and their associated transmit and receive datapaths into a single integrated device. The multiplexed datapaths allow data from any port to be routed to any MAC interface through shared transmit and receive paths, eliminating the need for separate dedicated components for each port while maintaining full functionality.
Solution Approach 2:
The transmit and receive datapaths are designed to be universally applicable across multiple ports and MAC interfaces. Each datapath can be dynamically assigned to different port-MAC combinations through control logic, enabling the same physical infrastructure to support multiple functions including media conversion, cable extension, port mirroring, and normal Ethernet operation.
2Adaptability or versatility
If dedicated separate components are used for each port, then functionality is comprehensive, but device complexity increases
Solution Approach 1:
The patent segments the Ethernet device into independent functional units: multiple ports, separate transmit datapaths, separate receive datapaths, and MAC interfaces. Each segment can be independently configured and assigned to different roles through control logic, allowing flexible combination without requiring complete dedicated infrastructure for each port.
Solution Approach 2:
The control logic dynamically assigns transmit and receive datapaths to different port-MAC combinations based on operational mode. The same physical datapaths can be reconfigured in real-time to support different functions such as normal operation, port mirroring, or media conversion, eliminating the need for static dedicated component assignments.
3Ease of operation
If fixed data path assignments are used, then device operation is simple, but adaptability to different configurations is limited
Solution Approach 1:
The patent introduces control logic as an intermediary layer between the physical datapaths and the port-MAC assignments. This intermediary manages the complex routing decisions and assignments automatically, keeping the operation simple for users while enabling high configuration flexibility through programmable control of datapath connections.
Data Source
AI summary
A multi-port Ethernet Physical (PHY) layer device includes multiplexed datapaths and control logic such that each transmit data connection for a port may be mapped to any combination of the transmit data connections for one of multiple Media Access Control (MAC) layers, and each received data connection for a port may independently be mapped to an combination of the receive data connections for one of the MAC layers and the transmit data connection(s) for the other port(s). The device may be configured to operate in normal and port swap modes, to support failover switching and/or dedicated redundant connections, as a cable extender or media converter, as a snoop device, to form an Ethernet ring topology, for broadcast transmit or mirrored receive, or as a unidirectional repeater.