Hi @ves0105 . These 5G modems can't be bridged. The Nighthawk might have an Access Point mode (connect its wan to 5G lan), or, it can be given another ip address and disable DHCP (connect lan to lan).
You do not need to change any settings to Sagemcom Fast, Connect the Nighthawk WAN port to Sagemcom's LAN port or WAN port in the event it does not work. Assign another local IP address and disable DHCP on the Nighthawk's connection settings.
Let us know how it will go.
Moved from nbn to 5g modem.
How to connect new 5G Sagemcom Fast 5866T modem to Nighthawk ax5400 that was connected to previous nbn modem? Thanks in advance