Flint 2 Ethernet Ports Stuck at 100 Mbps Negotiation – WiFi Fine, Tried Forcing Speeds via ethtool

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@will.qiu

To help narrow this down, could you please confirm the following:

1. Have you tested with different Ethernet cables? If possible, try the cable included with the Flint 2 or a shorter cable that is known to work properly with other devices.
2. If the issue persists, please try placing an unmanaged (dumb) switch between the Flint 2 and the ISP modem to see whether this changes the link speed.
3. Please try configuring LAN 2 (the 1 Gbps port) as the WAN interface by following this tutorial, then connect it to your ISP modem and check whether the issue still occurs.
4. When using the same Ethernet cable and modem port, do other devices negotiate at 1 Gbps normally?

hey my apologies for hijacking the thread but I’m facing exactly the same issue as OOP (my post: https://forum.gl-inet.com/t/flint-2-wan-lan-1-port-only-negotiating-10mbps-fd), I’ll just narrow down on the trouble shooting steps you shared

1. Tested across 3 ethernet cables and 2 PCs with gigabit ports, all cables are giving me gigabit ethernet via my old router (tested via iperf and verified with link speed on windows (1000mbps/1000mbps)

2. My original PC is connected to router via a network of dumb switches (2 dlink gigabit switches) and on my old router, I was easily getting gigabit, not on flint 2 and I only just swapped the routers out with no change in config, and further more, when I swapped in my old router back, I am again getting gigabit.

3. not sure if its relevant in my case since all ports on the router are negotiating 100mpbs except for Lan 1 which is stuck on 10mbps FD

4. No, tested across 2 laptops

   would really appreciate it if you can share any additional trouble shooting steps for this