Host Network Accelerators for Drop-Free Data Center Overlay Networking
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Solution Overview
Problem
Data centers face challenges with proprietary switch fabrics that are costly and prone to single points of failure, while off-the-shelf packet-based switching components result in lossy, non-deterministic behavior, failing to provide high-performance, scalable, and reliable network connectivity.
Innovation Solution
The implementation of host network accelerators (HNAs) with embedded virtual routers and integrated circuits that leverage low-cost, industry-standard IP over Ethernet (IPoE) technologies, providing seamless overlay networking and flow control to create a high-performance, scalable, and drop-free data center switch fabric without the need for proprietary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If proprietary switch fabric is used, then network performance and reliability are improved, but cost increases and single points of failure are introduced
Solution Approach 1:
The system segments network functions by deploying host network accelerators (HNAs) at individual host levels rather than requiring a centralized proprietary switch fabric. Each HNA independently handles overlay networking, flow control, and packet processing, dividing the network functionality across multiple independent units that eliminate single points of failure while reducing overall system cost.
2Ease of manufacture
If off-the-shelf packet-based switching components are used, then cost is reduced, but network behavior becomes lossy and non-deterministic
Solution Approach 1:
Host network accelerators serve as intermediary devices between standard packet-based network infrastructure and host systems. The HNAs implement deterministic flow control mechanisms and overlay networking protocols that guarantee packet delivery and ordering, transforming the non-deterministic behavior of off-the-shelf components into reliable, predictable network performance while maintaining cost effectiveness.
3Productivity
If proprietary switch fabric is used, then high performance is achieved, but device complexity and cost increase
Solution Approach 1:
The invention extracts critical networking functions (overlay networking, flow control, packet processing) from the centralized switch fabric and relocates them to host network accelerators at individual host levels. This extraction eliminates the need for complex proprietary switch fabric while maintaining high performance, as each HNA independently handles its host's network traffic with deterministic guarantees.
4Adaptability or versatility
If overlay networking with flow control is implemented using HNAs, then scalability and reliability are improved, but device complexity at host level increases
Solution Approach 1:
Host network accelerators are designed as self-contained units that independently manage overlay networking, flow control, and packet processing for their respective hosts. Each HNA autonomously handles network operations without requiring complex coordination with other hosts or centralized control, enabling easy scalability while containing complexity within individual host devices rather than the overall system.
Data Source
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AI summary
A high-performance, scalable and drop-free data center switch fabric and infrastructure is described. The data center switch fabric may leverage low cost, off-the-shelf packet-based switching components (e.g., IP over Ethernet (IPoE)) and overlay forwarding technologies rather than proprietary switch fabric. In one example, host network accelerators (HNAs) are positioned between servers (e.g., virtual machines or dedicated servers) of the data center and an IPoE core network that provides point-to-point connectivity between the servers. The HNAs are hardware devices that embed virtual routers on one or more integrated circuits, where the virtual router are configured to extend the one or more virtual networks to the virtual machines and to seamlessly transport packets over the switch fabric using an overlay network. In other words, the HNAs provide hardware-based, seamless access interfaces to overlay technologies used for communicating packet flows through the core switching network of the data center.