Value-Added Engineering

Engineering Optical Reliability
for DigitalOcean's GPU Infrastructure

15 years of optical interoperability expertise, now powering your datacenter buildout with validated, stress-tested transceivers.

15+ Years Experience
1000s Configurations Tested
100% Your Setup Mirrored
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Understanding Your Environment

We Mirror Your Exact Architecture

Every test we run uses your specific network topology, devices, and transceiver configurations.

GPU

GPU Compute Platform

GPU Accelerators NVIDIA H100 / H200
GPU Interconnect NVLink + NVSwitch
Configurations 1×GPU & 8×GPU
Memory Up to 141 GB HBM3e
ETH

Network Fabric

Public Network 10 Gbps
Private Network 25 Gbps
GPU Interconnect 900 GB/s NVLink
OPT

Optical Transceivers

High-speed optical interconnects validated for GPU cluster fabric—800G OSFP, 400G QSFP-DD, and 200G QSFP configurations tested for your datacenter environment.

GPU Switch
Visualizing Your Infrastructure

From Components to Connected Fabric

Your GPU Droplet cluster topology: NVIDIA H100/H200 nodes connect via high-speed interconnects into a dedicated training fabric, and via Ethernet NICs into storage/management. Validated for your environment.

InfiniBand Training Fabric Ethernet Storage & Management IB Fabric High-Speed Spine / Leaf IB Spine 1 IB Spine 2 IB Leaf A IB Leaf B ETH Fabric Ethernet Mgmt / Storage ETH Spine 1 ETH Spine 2 Leaf 1 Leaf 2 Leaf 3 GPU Compute Nodes Servers with GPUs + internal NVLink/NVSwitch + NICs/HCAs GPU Node 01 IB HCA + ETH NIC GPU Node 02 IB HCA + ETH NIC GPU Node 03 IB HCA + ETH NIC GPU Node 04 IB HCA + ETH NIC InfiniBand (training) Ethernet (mgmt/storage) GPU

Luma Cloud Platform

Your Environment, Recreated in Our Lab

We don't test in isolation. We build your exact A-Side and Z-Side topology to validate every connection.

Luma Cloud Setup Configuration showing 800G IB-Spine connection setup
Live configuration from Luma Cloud showing your GPU cluster fabric setup

Exact Device Matching

Your specific switches, transceivers, and fiber types matched exactly

A-Side / Z-Side Topology

Both ends of every link recreated for true end-to-end validation

Real Connection Details

OM5 Multi-mode fiber, MPO-12 connectors, exact distances

Quality Baseline

Your Golden Reference Module

A validated, characterized transceiver that serves as the benchmark for every unit we ship to you.

Golden Reference
Golden Reference Module configuration in Luma Cloud
01

Characterized Baseline

Every optical parameter measured and documented for your specific setup—power levels, signal quality, timing margins.

02

Comparison Standard

Every transceiver in your order is validated against this golden module to ensure consistent performance.

03

Traceable Results

Full test logs and qualification data available for your records and compliance requirements.

04

Setup-Specific

Not a generic reference—this module is qualified specifically for DigitalOcean's GPU cluster environment.

Comprehensive Validation

Rigorous Testing Based on Your Requirements

Three categories of testing ensure your transceivers perform flawlessly in production.

Example data shown below — actual test results will reflect your specific hardware configuration
10 Passed
1 N/A
0 Failed

Hardware & Software Interface Compatibility

Validates pin reset functions, low-power modes, electronic label reading, DDM/VDM information acquisition, and 8-hour traffic stability.

Category Test Item Environment Expected Result Samples Result Log Files
Performance Compatibility Eyescan Scanning Room Temp No anomalies in scanned digital eye diagram 4 pcs Pass Eye Diagram Scan.log
Error Distribution Test Room Temp 10 min FEC symbol error distribution < 7 4 pcs Pass PRBS&FEC.log
BER Test Room Temp BER typically better than 1E-7 4 pcs Pass PRBS&Symbol Error.log
Hardware Interface Hardware Pin Reset Function Room Temp Module recovers link up after device reset 1 pc Pass Reset Function.log
Hardware Pin Low-Power Function Room Temp Module recovers after low power mode 1 pc Pass Low-Power.log
Software Interface Electronic Label Data Read Room Temp Correctly read PN, SN, Vendor, Rev, Type 1 pc Pass Label Data.log
DDM Information Acquisition Room Temp Read Temp, Voltage, TxPower, RxPower, etc. 1 pc Pass DDM Info.log
VDM Information Acquisition Room Temp Read SNR, LTP, BER info 1 pc N/A —
EEPROM Information Acquisition Room Temp Dump EEPROM Page00h-Page27h 1 pc Pass EEPROM.log
Stability Testing 8h Traffic Stability Test Room Temp No link jitter, link down, or CRC errors 4 pcs Pass 8h Traffic.log
Optical Fiber Loopback Test Room Temp Link stable when fiber disturbed 4 pcs Pass Loopback.log
5 Passed
0 N/A
0 Failed

Temperature & Power Cycling

48-hour high-temp (70°C) and low-temp (-5°C) operation, thermal cycling from -5°C to 45°C, and power cycling recovery under extreme conditions.

Category Test Item Environment Expected Result Samples Result Log Files
Environmental Testing High-Temperature Operation 45°C / 48h No link down, CRC, or alarms 8 pcs Pass High Temp 48h.log
Low-Temperature Operation -5°C / 48h No link down, CRC, or alarms 8 pcs Pass Low Temp 48h.log
Temperature Cycling -5°C to 45°C No link down, CRC, or alarms 8 pcs Pass Temp Cycling.log
Environmental Stress High-Temp Power Cycling Recovery 45°C / 5+ cycles No link down, CRC, abnormal alarms 8 pcs Pass High-Temp Power.log
Low-Temp Power Cycling Recovery -5°C / 5+ cycles No link down, CRC, abnormal alarms 8 pcs Pass Low-Temp Power.log
1 Passed
9 N/A
0 Failed

Extreme Durability Testing

100,000+ read/write cycles, 1,000-cycle reset/release tests, signal jitter stress, laser switching endurance, and mechanical port insertion tests.

Category Test Item Environment Expected Result Samples Result
Time-Based Pressure Communication Read/Write Pressure 100,000 cycles Each cycle correctly writes and reads 1 pc Pass
Hardware Pin Reset/Release Stress 1,000 cycles Each cycle links up, no flapping 2 pcs N/A
Hardware Pin Power Switching Stress 1,000 cycles Each cycle links up, no flapping 2 pcs N/A
Optical Module Power Cycling Stress 1,000 cycles Each cycle links up normally 2 pcs N/A
Signal Jitter Stress Test 1,000 cycles Each cycle links up normally 2 pcs N/A
Laser Switching Stress Test 1,000 cycles Each cycle links up normally 2 pcs N/A
NIC Reset Pressure Test 1,000 cycles Each cycle links up normally 1 pc N/A
Firmware Upgrade Pressure 1,000 cycles Each upgrade successful 1 pc N/A
Mechanical Pressure Electrical Port Insertion/Extraction 30 cycles Link established consistently 4 pcs N/A
Optical Port Insertion/Extraction 30 cycles Link established consistently 4 pcs N/A

Production Experience

What Vendors Promise vs. What We've Proven

Datasheets say "compatible." We test to find out what actually works in production.

The Documentation Gap

Vendor specs assume ideal conditions. Real datacenters have mixed firmware versions, varying cable lengths, and multi-vendor environments that expose compatibility issues.

Real-World Compatibility Matrix

Works Issues Found Needs Workaround
# Switch Test Item 1×800G↔1×800G 2×400G↔1×400G 4×200G↔2×200G 8×100G↔4×100G
1 SN5600 (800G) SN5600 (800G) ✓ ✓ ✓ ✓
2 SN5600 (800G) CX7 NIC / / ✓ ✓
3 SN5400 (400G) CX7 NIC / / 2×200G NO link 4×100G NO link
4 SN4700 (400G) CX7 NIC / / 2×200G Link OK 4×100G Link OK
5 SN5600 (800G) SN5400 (400G) / ✓ NO NO
6 SN5400 (400G) SN4700 (400G) / / ✓ ✓
7 SN5600 (800G) SN4700 (400G) / ✓ ✓ ✓
8 SN5400 (400G) SN5400 (400G) / / ✓ ✓
9 Arista (800G) SN5400 (400G) / ✓ ✓ ✓
10 Arista (400G) SN5400 (400G) / ✓ ✓ ✓
11 SN5600 (800G) Loopback test ✓ ✓ ✓ ✓
12 SN5400 (400G) Loopback test / ✓ ✓ ✓

Connection Scenarios We've Validated

800G connection scenario with Router-5600-5600-CX7
Router → Spine → Leaf → Server (Dual MPO12)
800G connection scenario with single MPO16
Alternative: Single MPO16 Configuration
800G connection scenario with 4700-CX7
Mixed 800G/400G Topology
"We've tested thousands of configurations across hundreds of customers. When a vendor says 'compatible,' we verify it—and document the workarounds when it isn't."

Long-Term Value

More Than Optics: A Partnership

Luma brings 15 years of interoperability expertise to DigitalOcean's GPU infrastructure.

Proven Reliability

Every transceiver validated against your golden reference. No surprises in production.

15 Years Deep

We've seen every edge case, firmware bug, and vendor quirk. That knowledge protects your deployment.

Consultative Support

Not just a vendor—a technical partner who understands your architecture and growth plans.

Continuous Validation

As your environment evolves, we re-validate. New firmware? New topology? We test it first.

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Interactive Test Results

This section is fully interactive. Click the tabs to switch between test categories and click any log file link to view the actual test data.

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