Based on our understanding, the current situation is as follows:
- The PC achieves normal speeds when connected to the 2.5 Gbps LAN port of Flint 2.
- The same test on a 1 Gbps LAN port results in abnormal upload speeds.
- Wireless clients do not show any speed issues.
If this is correct, could you please help clarify the following:
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Is the same PC and the same Ethernet adapter used when testing both the 2.5 Gbps and 1 Gbps LAN ports?
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Please share the PC model and Ethernet adapter model.
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Please install OpenSpeedTest on the Flint 2 using the guide provided and run a local speed test. This will help determine whether the issue is caused by LAN-WAN forwarding performance or by the Ethernet connection between the router and the PC.
Script: OpenSpeedTest Installer for NGINX on GL.iNet Routers