Arrcus and UfiSpace have integrated the ArcOS network operating system with UfiSpace’s Broadcom-based open switch platforms, targeting Ethernet fabrics for AMD EPYC and AMD Instinct AI clusters. The companies describe the combined stack as production-ready and co-validated, and it’s being shown as part of GIGABYTE’s modular AI Cluster, GIGAPOD, built on AMD platforms.
The integration centers on UfiSpace switches built on Broadcom Tomahawk and Trident silicon, with ArcOS providing a lossless Ethernet (RoCEv2) fabric, congestion management, advanced load balancing, and telemetry. UfiSpace lists support for high-density, power-efficient switch hardware, including liquid-cooled, OCP ORv3-ready platforms.
Switch platforms and bandwidth targets
UfiSpace named several switch models and their stated switching capacities. The S9331-64HO and S9331-64HO3L use Broadcom Tomahawk 6 silicon and are listed at up to 102.4 Tbps. The S9321-64EO uses Broadcom Tomahawk 5 and is listed at up to 51.2 Tbps. For other roles—including storage, aggregation, server access, and out-of-band (OOB)—UfiSpace cited the S9300-32D (Broadcom Trident 4) at up to 12.8 Tbps and the S6301-56ST (Trident 3/TD3) at 130 Gbps.
From an operator’s standpoint, the most concrete takeaway is that this is an explicit “known-good” pairing of NOS features (lossless Ethernet and fabric telemetry) with specific merchant-silicon switch SKUs, rather than a generic “runs on whitebox” claim. That can reduce integration work when you’re trying to bring up RoCEv2 at scale, where tuning, congestion behavior, and observability tend to become the real schedule risks.
“By integrating ArcOS deeply with UfiSpace’s Tomahawk 6 and Tomahawk 5 Broadcom platforms, we give customers building AMD-powered AI clusters an open, high-performance Ethernet fabric they can deploy with confidence,” said Shekar Ayyar, chairman and CEO of Arrcus. UfiSpace CEO Vincent Ho said ArcOS is “L10-validated” with the platforms, and Broadcom’s Hasan Siraj said the companies are bringing Broadcom switch silicon “to market in an open, co-validated solution.” Daniel Hou, general manager of Giga Computing, said the combination is intended to remove “complex integration barriers” for customers deploying GIGAPOD systems.
Source: Arrcus
