I have installed OpenWRT 19.07.2 ar71xx on Mikrotik RouterBoard RB911G-HPacD (https://mikrotik.com/product/RB911G-5HPacD). And i have a problem, lan interface works properly only in Gigabit mode. When I connect cable to 100Mbit switch, PoE injector or network card set to 100 or 10 Mbit it is not working. Interface detects link and speed, when i send ping link act led blinks, but packets don't recieve on both sides.
I've tried to install openwrt 19.07.2, 18.06.5, snapshot ath79 for rb922uags-5hpacd and compiled and installed snapshot. The same picture.
I've also have tested on different RouterBoard RB911G-HPacD. When I install on my device RouterOS network works correct, i think that means hardware is working.
At the same time on RouterBoard RB911G-HPnD, which has same architecture and network chip, but different CPU and wifi, openwrt-19.07.2-ar71xx works properly.
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