@Fergin From the spec on tplink website, it seems the only difference is the speed and ethernet ports. 245 has a faster Signal Rate and one additional ethernet port. The EAP225 and EAP245 are both...

@Emitplink Hello, I would suggest you update the firmware before you try further steps. https://www.tp-link.com/en/support/download/tl-r600vpn/#Firmware

@Maciek339 Hi, Hope this configuration guide could help for your case. In addition, you may check for a firmware update for the switch, it seems you missed an update....

@ANTHONY123 Hi, As I know, the load balancing on TP-Link router works based on sessions, one session will only go through one WAN, so the test method matters a lot. To check whether load balancing...

@JFND Hello, I found some guides from the link below, which helps a bit for me. Good Luck! https://www.tp-link.com/en/omada-sdn/#resources

@JFND The new controller doesn't have daylight saving time, it's talked in other thread, so there is one hour difference due to that and I think it is the cause.