Form Factor vs Speed
-
QSFP28 → ~100 GbE
-
QSFP56 → ~200 GbE
-
QSFP-DD / QSFP112 → ~400 GbE and above
QSFP-DD slots can accept older QSFP56 / QSFP28 optics via pin reuse — useful for backward compatibility.
Cables & Breakout Links
| Type | Part # (Example) | Form / Speed | Notes |
|---|---|---|---|
| DAC 400G | MCP1660-W0xxxxx | QSFP-DD 400G | Short reach / lightweight |
| AOC 400G | MFA1U60-Wxxx | QSFP-DD 400G | Up to ~100 m OM4/SMF |
| 400G to 2×200G AOC | vendor variants | Split 400G | Spine→host breakout |
| 200G DAC (QSFP56) | MCP1650-V0xxxxx | QSFP56 200G | Short in-rack links |