UniFi 6 LR v2 ethernet not working

Installing and Using OpenWrt
3

So that is apparently

                PHY_ID_MATCH_EXACT(0x001cc916),
                .name           = "RTL8211F Gigabit Ethernet",

which means this is a new hardware revision which comes with a different (1 GBit/s only! :frowning: ) Ethernet PHY instead of the Aquantia AQR112C which they had put there before (without ever advertising the product to be suitable for 2500Base-T -- now they reduced the actual spec to what they also advertise...)

Please build from source and try this change (just to confirm that this fixes it):

--- a/target/linux/mediatek/dts/mt7622-ubnt-unifi-6-lr.dtsi
+++ b/target/linux/mediatek/dts/mt7622-ubnt-unifi-6-lr.dtsi
@@ -169,9 +169,9 @@
                #address-cells = <1>;
                #size-cells = <0>;
 
-               phy0: ethernet-phy@8 {
-                       compatible = "ethernet-phy-ieee802.3-c45";
-                       reg = <0x8>;
+               phy0: ethernet-phy@0 {
+                       compatible = "ethernet-phy-ieee802.3-c22";
+                       reg = <0x0>;
                };
        };
 };