I am building my personal private cloud. I am considering using second hand dell optiplexes as worker nodes, but they only have 1 NIC and I'd need a contraption like this for my redundant network.
Then this wish came to my mind. Theoretically, such a one box solution could be faster than gigabit too.
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Nice idea if you actually have the rest of the redundant network, uplink and all that jazz (otherwise you're wasting time and money).
the reason this won't ever be a product is because if you're serious about your redundancy you're installing extra NICs inside the servers, which are ideally not second-hand. the only people who would be the target market of such a product is just you.
also: do these servers not have pcie slots inside? is there truly no way of adding nics inside?
Yes, the entire network is supposed to be redundant and load-balanced, except for some clients that can only connect to one switch (but if a switch fails it should be trivial to just move them to another switch.)
I am choosing dell optiplex boxes because it is the smallest x86 nodes I can get my hands on. There is no pcie slot in it other than m.2 SSD slot which will be used for SSD.