Hello everyone,

I have a TP-Link Omada ER8411 configured with 4 fiber optic lines of 1 Gbps connected to the WAN ports. Each line, when tested individually and at different times, reaches around 900 Mbps, which is normal and expected.

However, the problem occurs when I run speed tests simultaneously on all 4 lines. Instead of maintaining close to 1 Gbps per line or summing up the performance, the speed on each line drops to around 400 Mbps. I don't think this should happen.

Here is my current setup:

• I am using the 4 x 1 Gbps ports on the router for the WAN connections.
• The SFP+ port is used for the LAN connection to my devices using switch SG3452X v1.20 with 10Gb conection

Does anyone know if this is a hardware limitation of the ER8411, or is there a configuration I can adjust to resolve this issue?

I appreciate any suggestions or explanations.

Thanks in advance for your help!