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Meta 16384 H100 CX-7 Hyperscaler DSF Ethernet Cluster Configuration
META-H100-CX7-DSF-AR-16K
Meta · H100 · CX-7
Rack type
NVL8
Cluster / location
Meta 16k DSF Cluster Architecture
Buyer profile
Hyperscaler
Networking type
DSF Ethernet
Number of XPUs
16,384
NIC used
CX-7
NICs / XPU
1
Scale-out BW / XPU
400G
XPU / server
8
Scale-up network
1 rows
Assigned blockDefault
H100 - NVL8
Scale-UpXPU: H100 NVL81 lineshared by 17 SKUs
Scale-up Units are based on the scale-up world size (8 XPUs).
XPU World Size
2
WS| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| XPUs per Node | · | 8 | 3,600 | · | · |
| Scale-Up World Size | · | 8 | 28,800 | · | · |
Switches
5
SW| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| Scale-Up Switch A | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 8,000 | 20 | 400 |
| Scale-Up Switch B | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 6,400 | 16 | 400 |
| Scale-Up Switch C | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 6,400 | 16 | 400 |
| Scale-Up Switch D | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 8,000 | 20 | 400 |
| Scale-Up Switch Total | Nvidia NVSwitch 3.0 (NVLink 4) | 4 | 28,800 | 72 | · |
Scale-Up Parts Summary
1
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Nvidia NVSwitch 3.0 (NVLink 4) | 8,192 | 4.00 | 0.50 |
Backend network
7 rows
Assigned blockDefault
H100 - NVL8 - CX7 - 4L - ETH - 7700R4C - META
BackendXPU: H100 NVL87 linesshared by 1 SKU
Backend Units are based on the cluster size (16,384 XPUs).
Switches
6
SW Network Layer | Switch and Server Spec | Aggregate Port Utilization | Network Bandwidth Aggregate | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SwitchPart Name / Model | Units# | Unit BWGbit/s | Port BWGbit/s | Downlink Ports / SW# | Uplink Ports / SW# | Max Ports# | Downlink Ports# | Uplink Ports# | Total Ports# | Downlink BWTbit/s | Uplink BWTbit/s | OversubRatio | |
| XPUs | · | 16,384 | 400 | 400 | 0 | 16,384 | 16,384 | 0 | 16,384 | 16,384 | 0 | 6,553.6 | · |
| NICs per Node | ConnectX-7 NIC - 400G | 8 | 400 | 400 | · | · | 1 | · | · | · | · | · | · |
| Leaf (RDSW) | Arista 14.4T DSF Leaf (7700R4C) | 512 | 30,400 | 400 | 32 | 40 | 76 | 16,384 | 20,480 | 38,912 | 6,553.6 | 8,192 | 0.8 |
| Spine (FDSW) | Arista 102.4T DSF Spine (7720R4) | 160 | 102,400 | 400 | 128 | 16 | 256 | 20,480 | 2,560 | 40,960 | 8,192 | 1,024 | 8 |
| Core (EDSW) | Arista 14.4T DSF Leaf (7700R4C) | 64 | 30,400 | 400 | 40 | 32 | 76 | 2,560 | 2,048 | 4,864 | 1,024 | 819.2 | 1.25 |
| Super-Core (DTSW) | Arista 102.4T Modular Chassis (7808R3-FM+7808J3) | 8 | 102,400 | 400 | 256 | 0 | 256 | 2,048 | 0 | 2,048 | 819.2 | 0 | · |
Transceivers
7
CN Network Layer | Transceiver / CablePart Name / Model | Total Units# | Units per SW/GPU# | Unit BWGbit/s | Lanes# | BW per LaneGbit/s | Agg. BWTbit/s |
|---|---|---|---|---|---|---|---|
| XPU Nodes | Generic 400G DR4 | 16,384 | 16,384 | 400 | 4 | 100 | 6,553.6 |
| Leaf | |||||||
| Downlink | Generic 800G 2xFR4 | 8,192 | 16 | 800 | 8 | 100 | 6,553.6 |
| Uplink | Generic 800G 2xFR4 | 10,240 | 20 | 800 | 8 | 100 | 8,192 |
| Spine | |||||||
| Downlink | Generic 800G 2xFR4 | 10,240 | 64 | 800 | 8 | 100 | 8,192 |
| Uplink | Generic 800G 2xFR4 | 1,280 | 8 | 800 | 8 | 100 | 1,024 |
| Core | |||||||
| Downlink | Generic 800G 2xFR4 | 1,280 | 20 | 800 | 8 | 100 | 1,024 |
| Uplink | Generic 800G 2xFR4 | 1,024 | 16 | 800 | 8 | 100 | 819.2 |
| Super-Core | |||||||
Cables
7
CB Network Layer | Cable/ FiberType | Total Units# | Units per Transceiver# | Unit BWGbit/s | Lane Count# | SerDes BWGbit/s |
|---|---|---|---|---|---|---|
| XPU Nodes | Generic 400G Single Mode | 16,384 | 1 | 400 | 4 | 100 |
| Leaf | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 400G Single Mode | 20,480 | 2 | 400 | 4 | 100 |
| Spine | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 400G Single Mode | 2,560 | 2 | 400 | 4 | 100 |
| Core | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | · | 2,048 | 2 | 400 | 4 | 100 |
| Super-Core | ||||||
Backend Parts Summary
7
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Generic 400G DR4 | 16,384 | 8.00 | 1.00 |
| Generic 400G Single Mode | 39,424 | 19.25 | 2.41 |
| Generic 800G 2xFR4 | 33,280 | 16.25 | 2.03 |
| ConnectX-7 NIC - 400G | 16,384 | 8.00 | 1.00 |
| Arista 14.4T DSF Leaf (7700R4C) | 576 | 0.28 | 0.04 |
| Arista 102.4T DSF Spine (7720R4) | 160 | 0.08 | 0.01 |
| Arista 102.4T Modular Chassis (7808R3-FM+7808J3) | 8 | 0.00 | 0.00 |
Frontend network
11 rows
Assigned blockDefault
H100 - NVL8 - Minipack-3 - META
FrontendXPU: H100 NVL811 linesshared by 4 SKUs
Converged Frontend + Storage Fabric
11
| Layer | Part / Model | Units | Attach / XPU |
|---|---|---|---|
| · | Minipack-3 OCP Rack 51.2T | 197 | 0.0120 |
| · | Minipack-1 OCP Rack 12.8T | 1 | 0.0000 |
| · | WhiteBox Tomahawk 2 6.4T | 29 | 0.0018 |
| · | Generic 1GbE Ethernet | 241 | 0.0147 |
| · | Generic 800G DR8 | 9,514 | 0.5807 |
| · | Generic 400G DR4 | 9,465 | 0.5777 |
| · | Generic 100G DR4 QSFP28 | 4,200 | 0.2563 |
| · | Generic 800G Single Mode | 13,021 | 0.7947 |
| · | Generic 400G Single Mode | 67 | 0.0041 |
| · | Generic 100G Single Mode | 1,871 | 0.1142 |
| · | RJ45 Cables | 11,547 | 0.7048 |
Frontend Parts Summary
11
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Minipack-3 OCP Rack 51.2T | 197 | 0 | 0.0120 |
| Minipack-1 OCP Rack 12.8T | 1 | 0 | 0.0001 |
| WhiteBox Tomahawk 2 6.4T | 29 | 0 | 0.0018 |
| Generic 1GbE Ethernet | 241 | 0 | 0.0147 |
| Generic 800G DR8 | 9,514 | 5 | 0.5807 |
| Generic 400G DR4 | 9,465 | 5 | 0.5777 |
| Generic 100G DR4 QSFP28 | 4,200 | 2 | 0.2563 |
| Generic 800G Single Mode | 13,021 | 6 | 0.7947 |
| Generic 400G Single Mode | 67 | 0 | 0.0041 |
| Generic 100G Single Mode | 1,871 | 1 | 0.1142 |
| RJ45 Cables | 11,547 | 6 | 0.7048 |
Compute Tray Networking Content
1 rows
Networking components inside the compute tray — accelerators, board-to-board connectors, retimers, and their per-tray bandwidth.
Assigned blockDefault
H100 - NVL8 - Generic
Compute TrayXPU: H100 NVL81 lineshared by 16 SKUs
| Tray layer | Part / Model | Units per Tray | Unit BWGb/s | Lanes | Lane BWGb/s | Per switch |
|---|---|---|---|---|---|---|
| XPUs per Tray | Hopper 100 | 8 | · | · | · | · |
| H100 Server | NVLink PCIe 5.0 x16 Retimer | 8 | 512 | · | · | · |
Compute Tray Parts Summary
1
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| NVLink PCIe 5.0 x16 Retimer | 16,384 | 8.00 | 1.00 |