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Arrcus-QCT Collaboration for AI-Optimized Rack Solutions


Arrcus-QCT Collaboration for AI-Optimized Rack Solutions
  • by: Source Logo
  • |
  • October 14, 2025

Arrcus, a hyperscale networking software company specializing in core, edge, and multi-cloud routing and switching infrastructure, has announced a strategic collaboration with Quanta Cloud Technology (QCT), a global leader in hyperscale server and switch manufacturing and a subsidiary of Quanta Computer Inc. The partnership integrates Arrcus' high-performance ArcOS network operating system with QCT's latest switching platforms to deliver high-bandwidth, low-latency networking in a validated, rack-level solution optimized for AI workloads. The solution will be unveiled at the 2025 Open Compute Project (OCP) Global Summit in San Jose, California, on October 13.

Quick Intel

  • Arrcus and QCT collaborate to combine ArcOS software with QCT switching platforms for AI-optimized rack solutions supporting scalable GPU clusters.
  • Features ACE-AI networking stack with IP CLOS and Virtualized Distributed Routing (VDR) for flexible AI training and inference architectures.
  • Enables lossless Ethernet fabrics using RoCEv2, PFC, ECN, dynamic routing, and congestion control for high throughput and low latency in AI workloads.
  • Ports ArcOS to QuantaMesh TA064-IXM (800G Leaf/Spine switch) and T1048-LYB (1G Out-of-Band management switch) for edge inferencing and data center clusters.
  • Includes hardware-level telemetry for real-time visibility into system health, integrated with orchestration frameworks for monitoring and control.
  • Leverages Broadcom Tomahawk 5 silicon for disaggregated Ethernet backend networks, enhancing efficiency in AI, HPC, and storage data transfers.

ACE-AI Networking Stack for AI Workloads

At the core of this collaboration is ACE-AI, Arrcus' intelligent networking stack designed specifically for the rigorous requirements of AI applications. It accommodates both IP CLOS topologies and Virtualized Distributed Routing (VDR) setups, facilitating adaptable and expansive GPU cluster configurations. By implementing lossless Ethernet fabrics through RoCEv2, Priority Flow Control (PFC), and Explicit Congestion Notification (ECN), along with dynamic routing protocols and advanced congestion management, ACE-AI guarantees elevated throughput and minimal latency throughout training and inference phases. Furthermore, it incorporates hardware-accelerated telemetry, granting instantaneous insights into system vitality, buffer utilization, and performance metrics, with effortless compatibility to prevailing orchestration platforms.

Integrated Switching Platforms and Use Cases

As part of the initiative, Arrcus is porting ArcOS to two advanced QCT switching platforms: the QuantaMesh TA064-IXM, an 800G switch suited for Leaf and Spine deployments, and the QuantaMesh T1048-LYB, a 1G switch dedicated to Out-of-Band (OOB) management functions. This joint offering targets critical use cases, including low-latency AI inferencing at the edge, expansive AI training clusters in private and hyperscale data centers, and multitenant AI fabrics featuring deterministic segmentation and isolation. It also incorporates sophisticated capabilities for application and network monitoring to ensure operational reliability.

In partnership with Broadcom, Arrcus and QCT are developing a disaggregated, high-performance, low-latency Ethernet backend network powered by Broadcom's Tomahawk 5 silicon, indispensable for AI workloads. This setup optimizes data movement across high-performance computing clusters, AI applications, and storage systems. For the frontend network, the collaboration utilizes established merchant silicon, encompassing Broadcom Tomahawk 5 and Trident series, to construct a robust Leaf-Spine fabric that provides a forward-looking foundation for AI and high-performance computing (HPC) ecosystems.

Strategic Partnership and Industry Impact

“As the AI revolution accelerates, networking has become the new accelerant,” said Shekar Ayyar, Chairman and CEO of Arrcus. “Together with Quanta, we are delivering a validated AI rack solution that combines our hyperscale-grade networking software with high-performance rack-scale QCT hardware to empower customers with agility, scale, and openness.”

“Partnering with Arrcus allows QCT to deliver high-bandwidth, low latency, scalable and validated AI rack solutions to our mutual customers,” said Mike Yang, Executive Vice President at Quanta Computer Inc. and President of QCT. “Together, we’re equipping next-generation data centers with cutting-edge switching platforms that support open networking standards to meet the demands of the AI era.”

“Broadcom is proud to see our Tomahawk 5 Ethernet switching technology integrated into this joint solution from Arrcus and Quanta,” said Ram Velaga, senior vice president and general manager, Core Switching Group, Broadcom. “High-performance, low-latency, and scalable networking is critical for AI workloads, and this collaboration showcases the value of combining open, innovative software with platforms built on Broadcom merchant silicon. Together, we’re enabling the next generation of AI infrastructure with the performance and flexibility customers demand.”

Arrcus and QCT are advancing additional platform integrations and refining a go-to-market approach to facilitate widespread customer deployments and large-scale solution validation. This alliance underscores their dedication to promoting open networking principles and developing infrastructure primed for the forthcoming era of AI advancements.

About Arrcus

Arrcus is a leading provider of networking software solutions that empower businesses to achieve unparalleled scalability, performance, and reliability in their infrastructure. Arrcus is disrupting the industry with disaggregated solutions that deliver innovative, agile, and cost-effective networking, allowing enterprises to break free from traditional, monolithic systems and embrace a more flexible, efficient, and scalable approach to modern networking. The Arrcus team consists of world-class technologists who have an unparalleled record in shipping industry-leading networking products, complemented by industry thought leaders, operating executives, strategic partners, and top-tier VCs. The company is headquartered in San Jose, Calif. 

About QCT

Quanta Cloud Technology (QCT) designs, manufactures, integrates, and services cutting-edge offerings for 5G Telco/Edge, AI/HPC, Cloud, and Enterprise infrastructure via its global network. Product lines include hyper-converged and software-defined data center solutions as well as servers, storage, and network switches from 1U to entire racks with a diverse ecosystem of hardware components and software partners to fit a variety of business verticals and workload parameters.

  • ArrcusQCTAI OptimizedNetworkingAI Infrastructure
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