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 |