The X Series Architecting for High Performance Scale with Xsight Labs

This section provides a high-level overview of the product roadmap, specifically introducing the X-Series and E-Series lineups. It identifies the six critical chips required to build modern AI Factories and explains the concept of a “Truly Software Defined” stack that operates at full line-rate across layers L1-7. This serves as the technical foundation for the subsequent specialized deep dives.

The X-Series, an Ethernet switch, distinguishes itself through a “truly software-defined” programmable architecture, utilizing 3072 Harvard architecture cores operating on a “run-to-complete” model, unlike competitors’ fixed pipelines. This provides unparalleled flexibility, enabling parallel packet operations, recursion, and extensive header processing, including 11 layers of MPLS and various encapsulations. This design is particularly well-suited for emerging AI-centric protocols such as Ultra Ethernet (UEC) and ESON, enabling customizable congestion management and efficient in-flight packet handling. The X-Series boasts significantly lower latency, achieving 450 nanoseconds compared to the typical 800 nanoseconds, and demonstrates exceptional buffer utilization, consistently above 86% even under heavy load.

The X-Series also stands out with its low power consumption, operating at under 200 watts for a 12.8T switch, which is described as disruptive. Its software-defined physical layer supports diverse SERDES speeds (10G to 200G) and modulation schemes, enabling mixed-and-matched configurations that facilitate connections between new and legacy interfaces. The programming model, though initially assembler-based with Python wrappers and libraries, has seen customers such as Oxide develop P4 compilers, with Xsight Labs planning to develop their own. This powerful, flexible, and low-power solution is specifically designed for edge deployments, including half-rack to two-rack configurations, satellites, and base stations, delivering significant reductions in power, rack space, and cost. The X-Series product was generally available in November 2022 and has been in mass production since the summer of 2023.