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Anthropic 147456 TPUv8i - Broadcom NIC - 200G Hyperscaler Ethernet Cluster Configuration

ANTH-TPUv8i-Dragonfly

Anthropic · TPUv8i - Broadcom · NIC - 200G

Rack type
—
Cluster / location
TPUv8i Dragonfly Cluster
Buyer profile
Hyperscaler
Networking type
Ethernet
Number of XPUs
147,456
NIC used
NIC - 200G
NICs / XPU
0.5
Scale-out BW / XPU
100G
XPU / server
1,152

Scale-up network

Assigned blockDefault
TPUv8i - Broadcom
Scale-UpXPU: TPUv8i - Broadcom0 linesshared by 2 SKUs

Scale-up Units are based on the scale-up world size (1,152 XPUs).

XPU World Size

2
WS
Scale-Up Network LayerPart / Model
Units#
Unit BWGbit/s uni-d
Lane Count#
Lane BWGbit/s uni-d
XPUs per Node·1,152···
Scale-Up World Size·1,152···

Switches

2
SW
Scale-Up Network LayerPart / Model
Units#
Unit BWGbit/s uni-d
Lane Count#
Lane BWGbit/s uni-d
per World36x36 Port OCS16···
per Cluster·2,048···

Connections & cabling

7
CN
Scale-Up Network LayerPart / Model
Units#
BW / LaneGbit/s uni-d
Unit DP#
DP / Lane#
Total DPs#
BW / ConnectorCable / Model
Cable Units#
··16Boards······
··96Cables······
··32DAC······
··64ACC······
··6Cables/Board······
··2DAC······
··4ACC······

Google ICI Networking

Dragonfly Worksheet
15

Scale-Up Network Worksheet (per Scale-Up World Size) — per-TPU ICI connectivity by connector type, from the config workbook.

ConnectorPart / ModelTPUs
Units per..#
Avg. per TPU#
Unit BWGbit/s
Lane Count#
SerDes BWGbit/s
BandwidthGbit/s
Attach Ratio# per GPU
Cluster Total#
TPU Rack64
TPUs - Out of TPU Connections1per TPU
PCB Connection off TPUPCB331,60082004,800
Passive Copper PortsGeneric 1.6T DAC1.251.251,60082002,000
Active Copper PortsGeneric 1.6T ACC0.750.751,60082001,200
Optical to OCS Ports1.6T FR8111,60082001,600
Total/TPU9,600
TPU Board - 4 TPUs4per Board
Intra-Board Connections
PCB TracesPCB61.51,60082009,600
Inter-Board Connections
Passive Copper PortsGeneric 1.6T DAC51.251,60082008,000
Active Copper PortsGeneric 1.6T ACC30.751,60082004,800
Optical to OCS Ports1.6T FR8411,60082006,400
Total/Board19,200
TPU Clique - 8 Boards. 32 TPUs - Off Clique Connections32per Clique
Intra-Clique Connections
Passive Copper CablesGeneric 1.6T DAC200.631,600820032,000
Active Copper CablesGeneric 1.6T ACC120.381,600820019,200
Inter-Clique Connections
Optical to OCS Ports1.6T FR83211,600820051,200
TPU Rack Total - 2 Cliques64
Rack-wide Part Count
PCB TracesPCB961.51,60082002001.5221,184
Passive Copper CablesGeneric 1.6T DAC42.670.671,60082002000.6798,304
Active Copper CablesGeneric 1.6T ACC21.330.331,60082002000.3349,152
Optical Transceivers1.6T FR86411,60082002001147,456

Scale-Up Parts Summary

4
ItemQty/ClusterQty/ServerAttach/XPU
PCB221,1841,728.001.50
Generic 1.6T DAC98,304768.000.67
Generic 1.6T ACC49,152384.000.33
1.6T FR8147,4561,152.001.00

Backend network

6 rows
Assigned blockDefault
TPUv8i - Broadcom - 200G NIC - 4L - ETH - 7050PX4-32S - ANTH
BackendXPU: TPUv8i - Broadcom6 linesshared by 1 SKU

Backend Units are based on the cluster size (147,456 TPUs).

Switches

7
SW
 Network Layer
Switch and Server SpecAggregate Port UtilizationNetwork 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
TPUs·147,456100200073,72873,728073,72873,728014,745.6·
TPUs per Node·4····1······
NICs per NodeNIC - 200G2200200··1······
ToRArista Tomahawk 3 12.8T (7050PX4-32S)4,60812,80020016166473,72873,728294,91214,745.614,745.61
LeafArista Tomahawk 4 25.6T (7060DX5-64E)1,15225,600200646412873,72873,728147,45614,745.614,745.61
SpineArista Tomahawk 4 25.6T (7060DX5-64E)1,15225,600200646412873,72873,728147,45614,745.614,745.61
4 Aggregation Blocks
Core300x300 Port OCS256·200288288073,72873,728014,745.614,745.61

Transceivers

10
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 NodesGeneric 200G DR4 QSFP56147,456147,45620045029,491.2
Leaf
DownlinkGeneric 200G DR4 QSFP5673,7286420045014,745.6
UplinkGeneric 200G DR4 QSFP5673,7286420045014,745.6
Spine
DownlinkGeneric 200G DR4 QSFP5673,72864200#ERR5014,745.6
UplinkGeneric 200G FR473,72864200#ERR5014,745.6
Core
Downlink·73,728288200··0
Uplink·73,728288200··14,745.6
Super-CoreOCS is Circular, 288 North, 288 South······
ToR
DownlinkGeneric 200G DR4 QSFP5673,7281620045014,745.6
UplinkGeneric 200G DR4 QSFP5673,7281620045014,745.6

Cables

10
CB
 Network Layer
Cable/ FiberType
Total Units#
Units per Transceiver#
Unit BWGbit/s
Lane Count#
SerDes BWGbit/s
XPU NodesGeneric 200G Single Mode147,4561200450
Leaf
DownlinkAlready counted above·····
UplinkGeneric 200G Single Mode73,7281200450
Spine
DownlinkAlready counted above·····
Uplink·73,7281200450
Core
DownlinkAlready counted above·····
Uplink······
Super-Core······
ToR
DownlinkAlready counted above·····
UplinkGeneric 200G Single Mode73,7281200450

Backend Parts Summary

6
ItemQty/ClusterQty/ServerAttach/XPU
Generic 200G DR4 QSFP56516,0964,032.003.50
Generic 200G Single Mode294,9122,304.002.00
NIC - 200G2562.000.00
Arista Tomahawk 3 12.8T (7050PX4-32S)4,60836.000.03
Arista Tomahawk 4 25.6T (7060DX5-64E)2,30418.000.02
Generic 200G FR473,728576.000.50

Frontend network

No converged frontend + storage fabric data for this cluster.

Frontend Parts Summary

0
ItemQty/ClusterQty/ServerAttach/XPU

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
TPUv8i - Broadcom - Generic
Compute TrayXPU: TPUv8i - Broadcom1 lineshared by 2 SKUs
Tray layerPart / ModelUnits per Tray
Unit BWGb/s
Lanes
Lane BWGb/s
Per switch
XPUs per TrayTPUv7x (Ironwood)4····
TPU Tray to Host TrayPCIe 5.0 x16 Cable4512···

Compute Tray Parts Summary

1
ItemQty/ClusterQty/ServerAttach/XPU
PCIe 5.0 x16 Cable147,4561,152.001.00