Chassis Management Controller Reduces TOR Switch Ports
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Solution Overview
Problem
In multiple-node chassis systems using Top-Of-Rack (TOR) switches, the complexity and cost of management port wiring are high due to each node requiring a separate connection to the TOR switch, resulting in a large number of ports and complex wiring.
Innovation Solution
Implementing a chassis management controller that reduces the number of nodes in contact with the TOR switch by using in-chassis routing and Intelligent Platform Management Interface (IPMI) utilities, allowing only a single node to communicate with the TOR switch, thereby reducing the total number of management ports required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each node in a multi-node chassis has a separate management port connected to the TOR switch, then each node can independently communicate with the management network, but the number of required ports and wiring complexity increases significantly
Solution Approach 1:
The patent combines multiple management ports into a single aggregated interface. The chassis management controller aggregates management traffic from multiple nodes through a single uplink to the TOR switch, eliminating the need for separate physical connections from each node while maintaining management capability across all nodes in the chassis.
Solution Approach 2:
The chassis management controller serves as an intermediary between the nodes and the management network. It receives management traffic from the TOR switch and distributes it to the appropriate nodes, or collects management traffic from nodes and forwards it to the TOR switch, thereby eliminating the need for direct connections from each node to the TOR switch.
2Ease of operation
If each node has a separate management port connection to the TOR switch, then direct management access is achieved, but the cost and complexity of the wiring system increases
Solution Approach 1:
Multiple management connections are merged into a single aggregated uplink from the chassis management controller to the TOR switch. This consolidation reduces the number of physical cables and ports required while maintaining the ability to manage all nodes through the single connection point.
3Device complexity
If a single aggregated management port is used per chassis, then wiring complexity is reduced, but the number of ports required on the TOR switch decreases
Solution Approach 1:
The chassis management controller acts as an intermediary that receives management traffic from the single aggregated port on the TOR switch and intelligently distributes it to the appropriate nodes within the chassis. This ensures that management communication reliability is maintained despite the reduced number of physical connections to the TOR switch.
Data Source
AI summary
Systems, methods, and computer-readable storage devices for reducing the amount of management ports (and associated cabling) for a top-of-rack server environment. Whereas other server management configurations have cabling connecting each node in multiple multi-node chassis in a server rack to a top-of-rack, systems configured as described herein designate a single node as a point of communication for the multi-node chassis. The designated node forwards communications for all nodes in the chassis to a chassis management controller, which acts as a distribution point for all communications within the multi-node chassis, with the benefit of only a single connection being required between the multi-node chassis and the top of rack switch.