I bought this Solution with at least two 2.5GbE NIC. Thoughts? Even better suggestions? - #6 by raffe and it has 4 x Intel i226-V 2,5g LANs.
So far I have only had time to test to install IPFire, restore backup to it and test if it works with one green and one red. And i worked.
But I do not know if it worked at 2,5g mode or 1g mode, what I found was that it was a little slower (550m instead of 700m) when downloading and faster when uploading (900m instead of 700m).
After that I have not had time to figure out what to test and how to test it 