@NikosK Try this guide, https://www.tp-link.com/us/support/faq/2983/ , it worked for me.

Mine was actually about the same. I have gigabit and it was giving me about 600 Mbps.

@Philbert duh, why didn't I think of that! Thank you, so it must be running from the router then.

I have an oc200 and a new er7206. The speed test from the controller doesn't come close to getting the right value, I am guessing because whatever running the test isn't powerful enough. Is it...

@YATechMonkey The latest controller that just came out a few days ago mentions ipv6 support and that a firmware update is coming for th switches.

oc200 update posted here https://www.tp-link.com/en/support/download/oc200/#Firmware