Thank you for the reply! Is the PPPoE over CTF supported in all firmwares? On the latest firmware I think it's _52 I'm unable to get over 450 either direction. My support case communication expert indicated a beta firmware update which may help the speed. Ill test further Wednesday either way1. For the port aggregation switch design, the R8500 uses an external 5 port Gbit switch for extending 2 extra LAN ports. The WAN port and LAN ports 1,2,3 are from BCM4709 and LAN ports 4,5,6 are from the external switch. The external switch does not use RGMII to connect to the BCM4709, instead it connects to an Ethernet phy port. The reason is that if we connect to an RGMII, it may impact the maximum aggregation (2.4G+5G1+5G2) WiFi performance. Also ports 4,5,6 are limited at 1G total bandwidth.
2. The R8500 supports PPPoE over CTF. So the PPPoE throughput can reach over 900+Mbps. In our current lab testing, the maximum PPPoE WAN speed has reached 950Mbps. So we can support a 1G PPPoE WAN speed if supported by the ISP.