Plus the NIC/PHY is likely assuming only a small range of propagation delay diff... | Hacker News

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BobbyTables2 on July 15, 2025 | parent | context | favorite | on: Petabit-class transmission over > 1000 km using st...

Plus the NIC/PHY is likely assuming only a small range of propagation delay differences between the lanes/links.

Probably falls down if one link is 1cm and the other is 100km.

A LAG could be done with different medium/speeds, though perhaps not likely in practice.

ryao on July 16, 2025 | [–]

You can calculate that using the deskew buffer sizes from here:

https://www.ieee802.org/3/df/public/23_01/0130/ran_3df_03_23...

That said, I fully expect such an order of magnitude difference to overwhelm the deskew buffer.

eqvinox on July 15, 2025 | [–]

> A LAG could be done with different medium/speeds, though perhaps not likely in practice.

802.1AX indeed requires all members of a LAG to use the same speed.

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