Switch Link Standby Mode Power Management
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Solution Overview
Problem
Existing network switch systems face challenges in scalability and power consumption, as switch stacking becomes impractical due to complex configuration and topology limitations, and existing power-saving technologies cannot be used without disrupting the switch system's topology.
Innovation Solution
A switch network that dynamically manages Inter Switch Links (ISLs) by placing underutilized links in standby mode, using a control mechanism to determine if other links can accommodate traffic, thereby reducing power consumption and maintaining system integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If switch stacking is used to increase throughput, then system capacity is improved, but configuration complexity and topology limitations increase
Solution Approach 1:
The system performs self-configuration through automated protocols. Switches automatically discover neighbors, negotiate link parameters, and establish topology without manual intervention. This eliminates the prohibitively complex manual configuration required by traditional switch stacking while maintaining the ability to form large-scale switching systems.
2Use of energy by moving object
If link utilization is reduced to save power, then energy consumption is improved, but system reliability deteriorates
Solution Approach 1:
The system dynamically adjusts link states between active and standby modes based on real-time traffic conditions. When traffic demand decreases, links transition to standby mode to conserve power; when demand increases, standby links can be activated. This dynamic adaptation allows the system to optimize power consumption while maintaining reliability through available standby capacity.
Solution Approach 2:
The system changes the operational parameter of links from active to standby state based on utilization thresholds. This parameter change enables power savings during low-utilization periods while preserving the physical link infrastructure for future activation, thus balancing energy efficiency with system reliability.
3Use of energy by moving object
If existing power-saving technologies are used to reduce power consumption, then energy usage is improved, but topology integrity is compromised
Solution Approach 1:
The system introduces a control mechanism that acts as an intermediary between traffic monitoring and link state management. This controller evaluates whether placing a link in standby mode would compromise topology integrity before allowing the transition. By mediating the decision process, the system can safely reduce power consumption while maintaining topological stability through coordinated link management.
Data Source
AI summary
A switch can reduce power consumption in a switch network by disabling under-utilized links between switches. The switch can include one or more line cards each operable to transmit and receive packets over a respective link to a remote switch. The switch can also comprise a control mechanism operable to place under-utilized links in standby mode whenever possible to conserve power. During operation, the switch can receive a standby request for placing a first link to a neighboring switch in a standby mode, and determines whether one or more eligible links to the neighboring switch can accommodate traffic from the first link. If the eligible links are able to accommodate traffic from the first link, and if the local switch and the neighboring switch agree to place the first link in standby mode, the local switch proceeds to place the first link in standby mode.