Specifications
Confirm model, interface type, rate, power, airflow and software version before ordering.
Compatibility answer
MCP1600-E003E26 is physically a 3 m QSFP28 passive copper cable and is identified for 100Gb/s InfiniBand EDR. A connector that fits does not prove the link will operate. Port mode, protocol, firmware, cable identification and speed negotiation must agree at both endpoints.
Five compatibility checks
- Endpoint models: record the complete switch, network adapter or server adapter model at each end.
- Port mode: confirm that both QSFP28 ports support the intended InfiniBand EDR operation.
- Firmware: compare the device releases and the cable ordering code with available compatibility guidance.
- Physical route: verify that 3 m is appropriate and that bend radius, strain and rack routing can be maintained.
- Link test: observe link state, negotiated speed, error counters, stability and behavior under sustained load.
Connection-method comparison
| Method | Typical fit | Main checks |
|---|---|---|
| Passive DAC | Short, low-power in-rack or adjacent-device link | Length, bend radius, coding and port support |
| AOC | More reach or a lighter cable assembly | Device coding, power, route and service method |
| Optics plus fiber | Structured cabling or longer distance | Modules, fiber type, wavelength, polarity and distance |
Pre-production test record
- Capture how each endpoint identifies the cable.
- Confirm that the target rate remains stable without persistent errors.
- Run a representative workload and monitor counters and temperature.
- Save endpoint, firmware, port and cable OPN details with the result.
Frequently asked questions
Is a third-party endpoint automatically unsupported?
Not necessarily, but no cross-vendor conclusion should be made from connector type alone. Use documented support or a controlled interoperability test.
What if the cable is too short or difficult to route?
Do not pull or exceed bend limits. Compare an appropriate AOC or optical design before changing the rack route.
Evidence boundary: This page provides a verification method, not a universal compatibility claim. The tested endpoint pair and firmware versions define the usable result.
See the interconnect compatibility workflow or browse the DAC and AOC catalog.
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