One 100mbps device caps all uploads 100mpbs

[psherman]

There is another thread where this same type of behavior was noted...

Dumb AP: plugging in a 100Base eth device limits wifi to 100Mbps internet speed

EDIT: please see post #16 I have a main router and a wifi access point, both with openwrt 22.03.5. The max throughput between the main router and wifi access point is 558 Mbps as measured by iperf3 within openwrt. The ethtool output for the involved devices reports the Speed is setup to 1000Mbps full duplex. The internet speed from a computer connected over ethernet to the main router reports 940Mpbs as measured by fast.com and speedtest.net. The iperf3 test between a wifi device connected t…

Seems like there is something wrong with the internal switch configuration... have you tried 23.05.0-RC2? Or something earlier (like 21.02 or even pre-DSA 19.07)? Might be helpful to understand what version(s) are affected.