I had no idea there were switches you could run NixOS on. What would be an example of such a switch?
For 1gbit: Ubiquiti Edgerouter ER-4 and ER-6; both have SFP cages for fiber optic transcievers https://github.com/NixOS/nixpkgs/pull/194153 https://store.ui.com/us/en/products/er-4