I tested ethernet uplink (WAN) and downlink (LAN1 and 2), they are working fine.
Also wifi repeater uplink to 2.4GHz works, but just gives 45 Mbps.
The access point is a Unifi HD line model and 2.4GHz and 5GHz are separated to use 2 different SSIDs.
When scanning, the Beryl does see both 2.4GHz and 5GHz WLANs.
I have turned off the downstream wifi APs for clients, but still it won’t connect to the 5GHz SSIDs (I tried different options on the Unifi AP, but that makes no difference).
A factory reset and an upgrade to 3.211 beta 4 did not help either.
I actually bought the Beryl because the Brume-W wifi repeater performance was not acceptable. That however means that I definitely need to use the Beryl’s 5GHz as Wifi repeater uplink to get better performance. And now this.