400ZR and 800ZR. Engineer the whole route.
WBN designs amplified coherent networks and supplies 400ZR / 800ZR solutions, matching the host, line mode, spectrum and optical path.
WBN / Engineering resources
Engineering resources
Engineering guides for AI fabrics, optical interfaces and coherent transport. Connect architecture decisions to the ports, fibers and operating conditions that make a network work.
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The architecture
behind the fiber.
How optical shuffling connects GPU rails to multiple network planes—and what that changes about topology, deployment and cost.
Read the optical shuffle architecture guide ↗ Companion: 800G to 1.6T—lanes, optics and the fabric ↗
Topology · port accounting · custom assemblies
Technical library
Find the detail.
Define the connection.
Guides to interfaces, host requirements, fiber construction and operation.
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800G to 1.6T: lanes, optics and the fabric.
Understand 100G versus 200G lane architectures, 800G gearboxing, 1.6T breakout, parallel versus WDM optics, switch radix and migration requirements.
Cable the fabric you intend to build.
From economical MPO assemblies to accessible premium connectors, staggered breakouts, multi-plane shuffles and thin 800G / 1.6T copper.
Choose the optical interface.
Choose an optical interface using both endpoints, the installed fiber path and exact model requirements.
Coding, fit, and qualification.
Distinguish coded identity, electrical and mechanical requirements, and actual host qualification evidence.
ConnectX-7 and ConnectX-8: specify the whole connection.
Choose CX7/CX8 optics by exact adapter, protocol and lane mode. Understand OSFP IHS versus RHS, twin-port modules and the fiber between them.
DAC, ACC, AEC, or AOC?
Compare DAC, ACC, AEC and AOC construction against endpoint requirements and the installed route.
Define the coherent operating envelope.
Define coherent host and line modes, optical conditions, dispersion, power and line-system requirements together.
DGX B300 versus GB300 NVL72: compare the system boundary.
Compare DGX B300 and GB300 NVL72 by NVLink domain, CPU architecture, external networking, cooling and deployment unit.
Duplex, parallel, or breakout?
Compare duplex, parallel and breakout paths while keeping optical wavelengths separate from physical fibers.
Engineer Ethernet for the collective.
WBN fabric engineering connects switch radix and rail layouts to RoCE congestion control, Ultra Ethernet choices and workload-based acceptance.
Ethernet and InfiniBand host requirements.
Record Ethernet or InfiniBand protocol, electrical lanes, port modes, host FEC and applicable software context.
GB200 interconnects: separate the fabrics before counting fiber.
Map GB200 NVL72 scale-up and scale-out connections, distinguish NVLink from NIC optics, and count links, modules and fiber assemblies correctly.
How to choose an EDFA.
Choose booster, preamplifier and inline roles using gain, total versus per-channel power, noise figure and channel-loading cases.
Inspect, clean, and verify.
Inspect, clean and verify fiber interfaces while preserving observations and the applicable handling procedure.
Jacket material and safety rating.
Keep fiber jacket material, safety rating and required installation evidence as separate attributes.
Optical shuffles: building the physical fabric for AI.
A fabric-level guide to optical shuffling: rails and planes, two-tier scaling, port accounting, shuffle boxes, harnesses and deployment engineering.
Polish, pins, keys, and viewing direction.
Record connector polish, pinning, key orientation and position viewing conventions for the actual mating pair.
RoCEv2: engineer the complete traffic path.
Design RoCEv2 around ECN/CNP, deliberate PFC policy, traffic-class consistency and workload-level validation—not a single lossless switch setting.
Tomahawk 6: turn switch capacity into a connection plan.
Understand Tomahawk 6 bandwidth, 100G/200G SerDes, port arithmetic, pluggable versus co-packaged optics, and the implications for an AI fabric.
Trace the complete strand map.
Compose the complete strand map through patches, trunks and cassettes, then verify endpoint positions.
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Planning paths
Carry the requirements into a working record.
Follow the connection from its initial definition to installation and operation.
AI fabric planning
Separate network domains, resolve endpoint requirements and retain the evidence needed to qualify a connection.
Fiber infrastructure planning
Carry endpoint requirements through connector details, strand mapping, installation conditions and inspection evidence.
Coherent DCI planning
Resolve the peer mode, route and line-system envelope before treating a loss budget as a feasible connection.
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