Any old gaming PC with 10G NICs from ebay will do the trick. Install any Linux distro, do some basic config and you're done. Wire speed with the smallest packet

Any old gaming PC with 10G NICs from ebay will do the trick. Install any Linux distro, do some basic config and you're done. Wire speed with the smallest packet size isn't required, you'll probably get at least a few million pps which should be enough. Or ubiquity ER-8-XG.