H3C Completes Industry-First Full-Scenario 800G AI Computing Network Interoperability Test

As AI computing moves into large-scale deployment, high-speed networks have become the foundation that keeps AI clusters running efficiently and ties distributed compute into one fabric. At the 2026 CFCF, China Fiber Connect Forum, H3C became the first vendor to complete a live 800G AI-network build-out test, covering all three scaling scenarios: Scale-Up, Scale-Out, and Scale-Across. The test showed strong stability and good multi-vendor interoperability, setting a practical benchmark for large-scale rollouts.

2026 CFCF Optical Connectivity Conference — live interoperability test site.

102.4T Switch + 800G LPO — High-Density Build-Out and Signal Integrity

Building AI data centers puts heavy demands on Scale-Up and Scale-Out. Traditional designs tend to suffer from low port density, too many network tiers, weak transmission stability, and high-power draw. H3C's answer is the S9828-128EP data center switch, with 102.4T of switching capacity in a single, breakthrough converged design.

On architecture: the box carries 1024 ports of 112G each and supports both a flat single-tier topology and a two-tier Spine-Leaf design, so it fits deployments of any size without the performance hit of multi-hop forwarding. On transmission: it uses ultra-low-loss PCB material and careful layout, with tuned link-balancing parameters that precisely compensate for signal loss — solving the crosstalk and attenuation problems that appear when 800G runs at extreme density. Combined with LPO (linear-drive pluggable optics), the switch cuts total power by 27% and latency by 17%, giving an energy-efficient, low-latency, highly adaptable AI network base.

H3C 102.4T switch — 800G LPO optical module, 72-hour full-bandwidth stress test, bit error rate statistics.

The test replayed a fully loaded cluster. H3C ran a 72-hour full-bandwidth stress test with multi-vendor 800G LPO modules. Through the run, the S9828-128EP stayed stable — no jitter, no drops, BER held below 1E-9 — and it worked well across several mainstream optical modules, showing H3C's strength in tight hardware-software integration.

51.2T Switch + 800G ZR/ZR+ — 80 km Cross-Domain Lossless Interconnect

As the national integrated computing network takes shape, cross-city scheduling and multi-center co-training are driving demand for Scale-Across: long-distance, lossless interconnect. But 800G long-haul still hits two walls: legacy DCI gear can't sustain 800G forwarding on bandwidth or stability, and ZR/ZR+ coherent modules run hot and their links fluctuate; long fiber is also exposed to burst traffic that causes congestion and packet loss, putting compute jobs at risk.

H3C's 51.2T DCI switch, the S12500R-64EP, targets exactly this. It takes 800G ZR/ZR+ modules directly. Through hardware-software co-design — precision power delivery and a straight-through airflow path to handle the heat, plus large buffers and a home-grown lossless transport algorithm — it avoids jitter and congestion loss, delivering stable 800G cross-domain lossless forwarding.

H3C 51.2T DCI switch — 800G ZR/ZR+ module, 80 km unrepeatered full-bandwidth interoperability test.

The test mirrored a real cross-data-center setup and completed an 80 km single-mode, unrepeatered, full-bandwidth run with multi-vendor 800G ZR/ZR+ modules. The 80 km link stayed steady, forwarding smoothly with no stalls or loss, and adapted well to several mainstream modules — confirming H3C's lead in long-haul hardware optimization, thermal and power design, and lossless transport.

H3C keeps working from real deployment scenarios, using steady engineering to solve the pain points the industry actually hits. Going forward, it will keep iterating on high-speed interconnect and build the efficient, reliable network base that the national computing network and the broader AI industry need.