The XDR Q3400-RA switch is specified to have 144 × 800G ports, but why does it only have 72 OSFP ports?

Each OSFP port provides two independent 800G connections (Twin-port 800G), so 72 OSFP ports are equivalent to 144 × 800G ports.

Q3400-RA, Quantum-X800, 4U, 144 XDR Ports over 72 OSFP Cages, Managed, InfiniBand XDR Switches

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NVIDIA Q3400-RA Quantum-X800 XDR InfiniBand Switch, 4U, 144x 800Gb/s Ports over 72 OSFP Cages, Powered by the Quantum-3 ASIC, 8 Power Supplies(Power Cords Not Included), Standard Depth, Managed, C2PAirflow, Rail Kit, with 1-year Service

Name: NVIDIA Q3400-RA Quantum-X800 XDR InfiniBand Switch, 4U, 144x 800Gb/s Ports over 72 OSFP Cages, Powered by the Quantum-3 ASIC, 8 Power Supplies(Power Cords Not Included), Standard Depth, Managed, C2PAirflow, Rail Kit, with 1-year Service
Brand: Naddod
SKU: 102612
Price: 107099.00 USD
Availability: OnlineOnly
Rating: 5.0 (18 reviews)

#102612

Model: Q3400-RA | SKU: 920-9B36F-00RX-8S0

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$ 107099.00

Switch Types:

Q3400-RA

Q3400-RA

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NVIDIA/Mellanox (InfiniBand)

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Total Price:$ 107099.00

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Item Spotlights

144 ports at 800Gb/s distributed across 72 octal small form-factor pluggable (OSFP) cages.
Support a two-level, fat-tree topology capable of connecting up to 10,368 network interface cards (NICs)
It is an air-cooled system compatible with standard 19-inch rack cabinets
Powered by the Quantum-3 ASIC, 8 Power Supplies(Power Cords Not Included)

NVIDIA Q3400-RA Quantum-X800 XDR InfiniBand Switch, 4U, 144x 800Gb/s Ports over 72 OSFP Cages, Powered by the Quantum-3 ASIC, 8 Power Supplies(Power Cords Not Included), Standard Depth, Managed, C2PAirflow, Rail Kit, with 1-year Service

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$ 107099.00

Specifications

Applications

Questions & Answers

Resources

Specifications

Applications

Questions & Answers

Resources

Description

NVIDlA Q3400-RA Quantum-X800 XDR InfiniBand Switch, 4U, 144x 800Gb/s Ports over 72 OSFP Cages, Powered by the Quantum-3 ASIC, 8 Power Supplies(Power Cords Not Included), Standard Depth, Managed, C2PAirflow, Rail Kit

The NVIDIA Quantum-X800 Q3400-RA 4U switch, powered by the Quantum-3 ASIC, leverages 200Gb/s-per-lane serializer/deserializer (SerDes) technology. It features 144 ports at 800Gb/s distributed across 72 Octal Small Form-Factor Pluggable (OSFP) cages. The switch’s high radix supports a two-level fat-tree topology capable of connecting up-to 10,368 ConnectX-8 network interface cards (NICs) with minimal latency and optimal job locality. The Q3400 is air-cooled.

Specifications

Part Number

Q3400-RA

Mount Rack

Ports

72xOSFP 2x800Gb/s

Airflow

Connector-to-Power (C2P)

Switching Capacity

115.2 Tb/s

Cooling Mechanism

Air Cooled

CPU

Intel CFL 4 Cores i3-8100H 3GHz

Security

CPU/CPLD/Switch IC based on IRoT

Software

NVOS

Input Voltage

200-240V AC

Dimensions(HxWxD)

4U, 7" (H) x 17.24" (W) x 33.5" (D) 177.8 mm (H) x 438 mm (W) x 850 mm (D)

Warranty

One year

Applications

1.6T XDR Switch to 1.6T XDR Switch

1.6T/1600G OSFP 2×DR4/DR8 is compatible with InfiniBand switches NVIDlA Quantum-X800 Q3400-RA.

1m (3ft) MTP®-12 (Female) to MTP®-12 (Female) Yellow OS2 12 Fibers Type B, LSZH Single Mode Elite Trunk Cable 3mm

$ 57.00

NVIDIA/Mellanox MMS4A00 Compatible 1.6T 2xDR4/DR8 OSFP PAM4 1310nm 500m DOM Dual MPO-12/APC InfiniBand XDR Silicon Photonics Transceiver Module for SMF (Finned Top)

$ 1749.00

Questions & Answers

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Does the XDR switch support backward compatibility?

Yes, it supports backward compatibility through speed reduction. The 800G XDR ports on the XDR switch can be reduced to 400G to connect with CX7 VPI 400G NDR network adapters.

Does the IB switch support Ethernet?

Currently, there are no switches that support both IB and Ethernet simultaneously. According to the IB standard, Ethernet data (IPv4/IPv6) can be transmitted over an IB network using the IPoIB tunneling technology.

Are the switch management functions, the NIC’s OpenSM subnet manager, and UFM the same concept? What is UFM?

The subnet manager is the core controller of an IB network, responsible for network initialization, routing, and partitioning. It can be deployed on managed IB switches or Linux servers with OFED drivers installed and is one of the components of UFM.
UFM is a comprehensive platform that includes different types such as Telemetry, Enterprise, and Cyber-AI. Among them, UFM Enterprise is the most widely used, offering web-based full-network management, monitoring, and analysis. It can control the entire IB network (including HCA, cables, and switches) through in-band management. The server running UFM must meet software requirements and be equipped with an IB network adapter for in-band connectivity.