Broadcom’s Jericho4 Unleashed: The 3nm Switch-Router Connecting a Million XPUs for Distributed AI
Ddos 
Broadcom has announced the shipment of its Jericho4 Ethernet switch-router platform, purpose-built for the next generation of artificial intelligence infrastructure. Designed to interconnect clusters of over a million XPUs (programmable acceleration processors) and to support deployment across multiple data centers, Jericho4 delivers industry-leading bandwidth, encryption-grade security, and lossless performance—laying the foundation for the expansion of distributed AI computing on a global scale.
As the computational scale and complexity of AI models continue to accelerate, single data centers are increasingly incapable of meeting rising demands for power and performance. This shift is driving the industry toward distributed architectures that span multiple sites and even geographical regions. Jericho4 emerges as a pivotal technology crafted in response to this transformation.
The platform supports up to 36,000 HyperPorts, each operating at 3.2 Tbps, and features deep buffering, full line-rate MACsec encryption, and lossless RoCE transmission over distances exceeding 100 kilometers—breaking through the physical limitations that have traditionally constrained high-performance network infrastructure.
At the core of Jericho4 is its revolutionary 3.2T HyperPort technology, which aggregates four 800G Ethernet ports into a single logical link. By eliminating the bottlenecks of conventional load balancing, this innovation boosts utilization efficiency by up to 70%, dramatically streamlining packet traffic flow within large-scale data centers.
Moreover, Jericho4 ensures every port supports line-rate MACsec encryption, delivering robust data security ideal for inter-datacenter synchronization, real-time model training, and the exchange of massive parameter sets—maintaining optimal performance even under intense computational loads.
Manufactured using a 3nm process, Jericho4 integrates Broadcom’s proprietary 200G PAM4 SerDes technology, enabling high-performance, low-power data transmission with greater signal reach. This eliminates the need for additional components like retimers, thereby simplifying system architecture, reducing overall costs, and enhancing design stability.
Jericho4 is fully compliant with the Ultra Ethernet Consortium (UEC) standards, ensuring seamless interoperability with ecosystem products built on standardized Ethernet protocols—including NICs, switches, and diverse software stacks. This compatibility accelerates the advancement of open AI architectures and fosters industry momentum toward heterogeneous system integration and shared computational infrastructure.
Together with Broadcom’s previously released Tomahawk 6 and Tomahawk Ultra chip series, Jericho4 completes the company’s end-to-end Ethernet portfolio—ranging from single-rack setups and high-density clusters to multi-datacenter deployments. Whether powering the training of trillion-parameter generative AI models or supporting bandwidth-intensive, real-time scientific workloads, Jericho4 enables a more agile, scalable, and resilient model of distributed AI infrastructure.
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