Dual-Board Ethernet Switch Automatic Failover Mechanism
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Solution Overview
Problem
Current network switches for data service providers lack redundancy and failover mechanisms to ensure 99.999% reliability, particularly in remote installations where maintenance is not continuous, leading to potential service interruptions.
Innovation Solution
A telco-grade server/Ethernet network switch architecture comprising two independent server/Ethernet switches connected through a high-speed backplane, with hot-swappable boards and a control processor that automatically switches traffic paths between switches in case of hardware failures, ensuring seamless service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mono-board network switch design is used, then the device structure is simple, but the reliability is low and service interruption occurs when hardware fails
Solution Approach 1:
The network switch is divided into two independent server/Ethernet switch boards (Switch-A and Switch-B) that can operate independently. Each board has its own control processor, switch fabric, and LAN interface boards, allowing one board to continue serving traffic while the other undergoes maintenance or replacement.
Solution Approach 2:
The system implements beforehand cushioning by maintaining a standby backup board that is pre-configured and ready to take over immediately upon failure detection. The control processors continuously monitor hardware status and can trigger automatic failover before complete service disruption occurs.
2Reliability
If dual platforms with auto failover are deployed to meet 99.999% reliability, then service interruption is minimized, but the device complexity and maintenance requirements increase
Solution Approach 1:
The system implements self-service through automatic failover mechanisms. When a hardware failure is detected, the control processor automatically detects the failure, arbitrates between available boards, and switches traffic paths without requiring manual intervention from maintenance personnel.
Solution Approach 2:
The control processors continuously monitor the operational status of all hardware components through feedback mechanisms. When a failure is detected, the system uses this feedback information to trigger the appropriate failover action, ensuring reliable and automated response to hardware issues.
3Ease of repair
If hot-swappable boards are implemented, then board replacement can be done without service interruption, but the circuit protection design becomes more complex
Solution Approach 1:
The system performs preliminary action by pre-configuring the standby backup board with all necessary software images, control processor settings, and traffic routing information before any failure occurs. This ensures that when a board needs replacement, the standby board is ready to immediately assume the failed board's function without service interruption.
Solution Approach 2:
The system implements dynamics through its ability to dynamically reconfigure traffic paths in real-time. When a board is replaced or failed, the control processors dynamically update the switching fabric connections and traffic routing to redirect all traffic to the operational boards, enabling hot-swappable operation.
Data Source
AI summary
The telco-grade server/Ethernet network switch is the most compacted-size design with a 1.5 U or 2 U height chassis. A high-speed backplane to connect with all boards, including server/Ethernet switch board, LAN port interface board, power supply board, management board and fan module board and hot-swappable feature supported. Two equal switches are accommodated within chassis to perform two independent switches or one switch with telco-grade to meet high reliability request, such as 99.999% reliability.