Well, in case anyone has the same concern. I have now been able to set up the FRITZ!Box 5590 Fibre XGS-PON on green.ch. A call to green.ch is required, they will then give you step-by-step instructions. In addition, the support will give you the access data and carry out the configuration on their site beforehand.

My experience at green.ch with another third-party router (Zyxel PM7300-T0 in the standard configuration as a bridge, i.e. DHCP lease is queried by the firewall). In my opinion, however, this should also apply to the set-up with the Fritz!Box or other third-party routers, see also https://en.avm.de/service... regarding the setting of the VLAN)

- VLAN 10
- No DHCP options
- No MAC address cookies (as with Sunrise, for example)

I have previously tried various options. I haven't even connected the router provided by green.ch yet. I received the activation code via telephone support.

Hello, is your question still relevant? My Fritzbox runs with Green without any problems.

Unfortunately, we have no experience of this ourselves. However, we recommend that you ask such a question as a discussion, as experience has shown that more customers respond there than to a single question.
https://www.digitec.ch/de...