Comment by BobbyTables2

7 months ago

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.

2 comments

BobbyTables2

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

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

> 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.