HDR QSFP56 active optical cables technical selection questions
Technical evaluation questions with variant-specific scope and sources.
HDR QSFP56 active optical cables technical selection questions
These questions are prepared from the cited technical documentation and clearly scoped owner inputs. They are not a measured frequency ranking. Keep the applicability line with each answer; do not transfer board, cooling, crypto, protocol, cable length or firmware facts between variants.
What protocols are documented for MFS1S00-H020V?
Applicable canonical content subjects: 980-9I45T-00H020.
The family specification and exact CX7 row support InfiniBand HDR and 200GbE. The assembly is 20 m long.
Public references
- MFS1S00-HxxxV 200Gb/s QSFP56 MMF AOC Product Specifications | MFS1S00-HxxxV 200Gb/s QSFP56 MMF AOC Product Specifications
- Validated and Supported Cables and Switches | ConnectX-7 Firmware RN
Is it a split cable?
Applicable canonical content subjects: 980-9I45T-00H020.
No. It is a one-to-one QSFP56 AOC with four 50G-PAM4 lanes per end.
Public references
- MFS1S00-HxxxV 200Gb/s QSFP56 MMF AOC Product Specifications | MFS1S00-HxxxV 200Gb/s QSFP56 MMF AOC Product Specifications
- Ordering Information | MFS1S00-HxxxV 200Gb/s QSFP56 MMF AOC Product Specifications
What power should be budgeted at each port?
Applicable canonical content subjects: 980-9I45T-00H020.
The operational specification gives 5 W maximum per end with all lanes retimed. Check the host cage and thermal design.
Public references
Which Ethernet switch application is stated?
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NVIDIA explicitly names 200GbE links between SN3700 and SN4600. Additional host combinations need their applicable support matrix.
Public references
Where does forward error correction take place?
Applicable canonical content subjects: 980-9I45T-00H020, 980-9I96D-00H010.
The FAQ places FEC in the switch and network adapter. Match the supported endpoint configuration; a cable does not independently fix a FEC mismatch.
Public references
Why can a cable have two minimum bend radii?
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The connector exit generally needs a larger bend radius than the cable body. Follow the exact assembly drawing and leave adequate space behind the rack door.
Public references
What split does MFS1S50-H010V provide?
Applicable canonical content subjects: 980-9I96D-00H010.
A 200G QSFP56 head branches into two 100G QSFP56 ends over a 10 m active optical assembly.
Public references
- MFS1S50-H0xxV 200Gb/s QSFP56 to 2x100Gb/s QSFP56 Low Latency MMF AOC Product Specifications | MFS1S50-H0xxV 200Gb/s QSFP56 to 2x100Gb/s QSFP56 Low Latency MMF AOC Product Specifications
- Ordering Information | MFS1S50-H0xxV 200Gb/s QSFP56 to 2x100Gb/s QSFP56 Low Latency MMF AOC Product Specifications
Are its 100G tails ordinary four-lane QSFP28 ports?
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No. The branches use two 50G-PAM4 lanes and QSFP56 shells. Equal 100G totals do not establish a match to a four-lane 25G-NRZ QSFP28 link.
Public references
Which protocols and power values are documented?
Applicable canonical content subjects: 980-9I96D-00H010.
NVIDIA describes HDR-to-HDR100 and 200GbE-to-two-100GbE use. Budget up to 5 W at the head and 3.5 W at each branch.
Public references
- MFS1S50-H0xxV 200Gb/s QSFP56 to 2x100Gb/s QSFP56 Low Latency MMF AOC Product Specifications | MFS1S50-H0xxV 200Gb/s QSFP56 to 2x100Gb/s QSFP56 Low Latency MMF AOC Product Specifications
- Specifications | MFS1S50-H0xxV 200Gb/s QSFP56 to 2x100Gb/s QSFP56 Low Latency MMF AOC Product Specifications
What lifecycle status is recorded?
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The exact current CX7 row says EOL [HVM], and the family is listed under products no longer for sale. Earlier HVM entries are historical release evidence.