Modular Network Element Management via Dedicated Links
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Solution Overview
Problem
Conventional network hardware architectures, such as chassis-based systems and rack-mounted units, face limitations in flexibility, scalability, and efficiency, particularly in supporting high SERDES rates and adapting to diverse applications, due to fixed form-factors and centralized power/cooling, which restricts their ability to address evolving network demands.
Innovation Solution
A modular network element architecture that combines rack-mounted units and chassis-based systems, featuring hybrid lineboxes with variable pitch and faceplate ports, connected via electrical and optical cabling, and a chassis management protocol for power, connectivity, and timing synchronization, allowing for flexible deployment and expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chassis-based system is used with PCB backplane, then modules can be selectively inserted and power is shared, but the system cannot support higher SERDES rates and flexibility in size and power is limited
Solution Approach 1:
The system is divided into independent rack-mounted units (lineboxes) that can be deployed individually or combined. Each linebox is a self-contained module with its own power supply and cooling, eliminating the need for a shared chassis while maintaining modularity. This segmentation allows flexible deployment scenarios from single units to aggregated systems.
Solution Approach 2:
The system transitions from fixed chassis-based form factors to dynamic, scalable rack-mounted units that can be added or removed independently. The architecture supports variable system sizes and power consumption levels, allowing the network element to adapt to changing requirements without being constrained by predetermined chassis configurations.
2Adaptability or versatility
If rack-mounted units are used, then flexibility and low initial cost are achieved, but interconnect complexity increases with massive cabling
Solution Approach 1:
Multiple lineboxes are aggregated to form a unified network element system. The rack-mounted units are designed to work together as a coordinated system, sharing control plane functionality and synchronization resources. This merging approach maintains the deployment flexibility of individual rack units while reducing operational complexity through system-level integration.
3Reliability
If chassis-based system is used, then power installation once and redundancy are provided, but large initial investment and fixed slot sizes are required
Solution Approach 1:
Each rack-mounted linebox includes its own power supply and cooling subsystems, making the units self-sufficient. This self-service approach eliminates the need for centralized power distribution infrastructure while allowing individual units to be deployed independently. Redundancy is achieved through the ability to operate multiple independent lineboxes rather than relying on chassis-level power redundancy.
4Stability of the object's composition
If PCB backplane is used, then fixed slot architecture is maintained, but the ability to support higher SERDES rates is limited
Solution Approach 1:
The traditional mechanical PCB backplane connection system is replaced with electrical or optical cabling connections between rack-mounted units. This substitution removes the bandwidth and distance limitations of PCB traces while maintaining reliable, high-speed connectivity. The cabled architecture supports higher SERDES rates and longer connection distances without the physical constraints of a rigid backplane.
Data Source
AI summary
Systems and methods of managing a modular network element as a single entity and the modular network element includes a plurality of line modules and zero or more switch modules in a chassis. The plurality of line modules are located separate from the chassis and connected to the chassis and/or to one another via cabling. The method includes operating a management plane between the plurality of line modules and the zero or more switch modules via one or more dedicated links in the cabling; managing the plurality of line modules and the zero or more switch modules as a single network element utilizing a chassis management protocol over the management plane; and designating one of a controller in the chassis and a processor in one of the plurality of line modules operating as a virtual controller as primary for the chassis management protocol.