Modular Network Switches Without Backplanes
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Solution Overview
Problem
Conventional network switches face challenges with inefficient cooling and frequent component replacements due to obstructed air flow from backplanes or midplanes and lack of locking mechanisms for secure card installation, leading to high operating temperatures and reduced component longevity.
Innovation Solution
A modular network switch design with a latching apparatus for secure component installation and removal, an orthogonal arrangement of internal components to facilitate parallel air flow, and a distributed CPU design allowing easy upgrades without disturbing other components, eliminating the need for backplanes or midplanes that obstruct air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If backplane or midplane is used to mount line cards and fabric cards, then component installation is simplified, but air flow is obstructed resulting in high operating temperatures
Solution Approach 1:
The patent removes the backplane/midplane component entirely from the system. Line cards and fabric cards are mounted directly to the enclosure walls using brackets, eliminating the obstructive intermediate mounting structure while maintaining secure installation capability
Solution Approach 2:
The patent transitions from a centralized planar mounting approach (backplane) to a distributed three-dimensional mounting approach where cards are attached to different walls of the enclosure, allowing air to flow through previously blocked regions
2Ease of operation
If conventional handles are used for card removal, then manual operation is simple, but locking features are absent reducing component security
Solution Approach 1:
The patent combines the handle function with a locking mechanism into a single integrated component. The handle includes a latch that engages with the bracket to secure the card during operation, and automatically releases when pulled, providing both security and ease of removal
Solution Approach 2:
The handle transitions from a static gripping component to a dynamic locking mechanism that automatically engages when the card is inserted and automatically releases when pulled, adapting its state based on the card's position
3Adaptability or versatility
If CPUs are mounted to line cards, then line card functionality is integrated, but CPU upgrades require line card replacement increasing complexity
Solution Approach 1:
The patent separates the CPU mounting function from the line card assembly by providing a dedicated CPU bracket that attaches independently to the enclosure. This allows the CPU to be upgraded by removing only the bracket and CPU, leaving the line card intact and functional
Data Source
AI summary
Modular network switches and other computer systems are described herein. A modular network switch can include a latching device for installing and removing computer modules (e.g., line cards) from an associated cabinet or enclosure. The network switch can also include interconnected computer modules (e.g., line cards, fabric cards, control modules, etc.) that include circuit boards oriented parallel to the flow of cooling air through the cabinet in the absence of a backplane or midplane oriented perpendicular to the air flow. The absence of such backplanes and/or midplanes provides a more direct air flow path through the cabinet, thereby enabling a more efficient flow of cooling air and lower operating temperatures. Additionally, the network switch can include an orthogonal arrangement of data planes, control planes, and/or power planes that can be efficiently interconnected to increase operational speed and further facilitate the flow of cooling air through the computer cabinet.