Unlocking 25 Gigabit/S on 10 GbE Direct Attach Copper
51 points by kohlschuetter
by kalleboo
2 subcomments
Very cool! Also cool to see inside. It really is directly attached with nothing in between, I honestly wasn't expecting there to be NOTHING in the signal path.
> In a sense, it’s a revolutionary way of how to network — it separates the “what” from the “how”. To be fair: that revolution already happened over 20 years ago
How quickly we have forgotten about AUI (Attachment Unit Interface)
by touisteur
2 subcomments
That was a very eye-opening post, full of very interesting details on how modern wired networks work, between NIC and the physical layer... so many mysteries about SFP black magic just falled into place in my head...
by cozzyd
0 subcomment
At least DACs work out of the box even with an Intel NIC...
I tried to do something crazy. I had a 4-port XMC 10Gb NIC in the flight computer for a balloon experiment. Two ports of which were used for 10 Gigabit links to an FPGA for data acquisition. I wanted one port to be 100-BaseFX. Turns out that it was not possible to get a compatible SFP module (ok, it's sort of crazy to use a 10 Gb NIC for a 100Mb connection, but the copper RJ45 transceivers all work fine!).
by psyclobe
1 subcomments
So... can we upgrade our existing sfp connectors to 25GBPs if our cable quality is good enough?
by jeffrallen
1 subcomments
Super brilliant! Great work. I could have used this when a vendor sent me cables that had incompatible codes on both ends.
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