The problem is: swisscom sales told me I would be able to download files at up to 10 Gbs.
This https://www.swisscom.ch/en/residential/plans-rates/inone-home/internet/fibre.html mentions:
“Upload and download photos, videos and files at speeds of up to 10 Gbit/s”
This is NOT possible and a lie!
The maximum speed is 2.5 Gbs, because that is the fastest connection available behind the modem.
Likely only 5% of the users will notice this, and are technical enough to put a separate firewall and fibre network behind the router, but this is what I wanted to do. Our family has access to private cloud services that do provide 10 Gbs, and I wish to have a separate firewall between the internal network and the fibre, so the IB3 should offer the option to passthrough the connection (not offered currently).