@consmast I tried also all possible settings. I ended up in a factory reset of the router. Configured it without Omada fist and there the loppback was suddenly working. So I adopted it back in omada...

@consmast @d0ugmac1 Hi guys, sorry for bringing the topic up again, but I changed my old TP-Link WLAN Router with a new ER605 v2 managed by Omada Software Controller. Firmware is 2.1.2 from the...