Spirent Communications and Juniper Networks successfully conducted the first public demonstration of Ultra Ethernet Transport (UET) during Interop25 Tokyo, showcasing key interoperability and readiness milestones for the Ultra Ethernet Consortium (UEC). The joint demonstration featured Spirent’s B3 800G test appliance and Juniper’s QFX 5240-64OD switch running 800G interfaces, validating their capability to recognize and forward UET and RoCEv2 traffic simultaneously. The event marked a significant step toward ensuring that next-generation Ethernet-based networks can support the evolving demands of AI and HPC environments.
The test setup, performed in collaboration with TOYO Corporation, highlighted the seamless coexistence of UET and RoCEv2 protocols in a real-world environment. The demonstration earned Spirent and Juniper a Special Prize from Interop ShowNet, reinforcing their leadership roles in the UEC initiative. With the first UEC specification nearing release, both companies are emphasizing the importance of early validation and performance benchmarking to foster a reliable and scalable ecosystem for AI/ML network architectures.
Spirent’s traffic emulation tools and Juniper’s AI-native data center switching platform are designed to support high-throughput, low-latency networking required by modern workloads. “Validating performance and interoperability with emerging transport standards like UET is essential for ensuring next-generation infrastructure can meet the evolving demands of AI-driven networking,” said Praful Lalchandani, VP at Juniper Networks. Spirent Japan’s General Manager Masatoshi Nishihara added, “By facilitating early adoption and validation of standards, Spirent empowers organizations to confidently prepare for the transition to next-generation networking.”
- First live UET demonstration conducted by Spirent and Juniper at Interop25 Tokyo
- Test featured Spirent B3 800G Appliance and Juniper QFX 5240-64OD switch
- Demonstrated coexistence of UET and RoCEv2 traffic in a live network topology
- Interop ShowNet awarded Special Prize to the joint demo for innovation
- Supports UEC’s mission to develop Ethernet-based transport optimized for AI/ML workloads
- Ultra Ethernet is a next-generation networking initiative designed to meet the low-latency, high-throughput demands of AI and high-performance computing (HPC) environments by evolving standard Ethernet to handle the unique requirements of distributed training workloads. Launched in 2023, the Ultra Ethernet Consortium (UEC) is an industry collaboration under the Linux Foundation that includes hyperscalers, semiconductor companies, and networking vendors such as AMD, Arista, Broadcom, Cisco, HPE, Intel, Juniper, Meta, and Microsoft. UEC aims to create a fully interoperable, Ethernet-based transport optimized for AI/ML clusters, incorporating enhancements across layers 1 to 4. The consortium’s efforts focus on developing new congestion control, reliability, and transport-layer mechanisms while maintaining Ethernet’s foundational compatibility and openness. UEC is currently finalizing its first technical specification, expected to be released in 2025, which will define the reference architecture and standards for Ultra Ethernet Transport (UET), enabling hardware and software vendors to begin full-scale implementations.
