Something is wrong with your test config, the RB5009 has no problem pushing > 2.2Gbps download over GPON in SFP+ port with PPPoE and withouth fasttrack. CPU Frequency Auto. Here are a few screenshots and links:
https://www.speedtest.net/my-result/d/579350e9-dd72-4846-8d43-9a428786c0b4 https://www.speedtest.net/my-result/d/3fa9b665-f771-4c0e-b516-66309e30e11a
