If you put the D6400 in modem only mode then you should be good to go there.
Check with your future ISP first to see what they support on there system for types of modems with out built in routers. They should have a list of modems to look at.
Netgears CM series are cable modems only.
Netgeard DM series are DSL modems only.
Any C#### or D#### series are modems with built in routers.
in what sense should I check if the ISP is compatible with the netgear modem? for now i am using the d6400 in modem mode only and it seems to be okay apart from the fact that the xr500 is not opening my doors with upnp just this i should fix, so can you make a specific model for ftth?
One thing that may seem trivial but the static ip for enabling game ports is not enough for me to insert it from the router or do I also have to set it on the device where I enable the ports? thank you
You should only have to set it on the router. If you do set it manually from the device, make sure it reflects what you've set up in the router. A conflict of settings would be a big problem.
You can forward as many ports as you want to a device, if you try to open that exact same port on another device thats when it will likely not let you.
I understand but it is correct to make the port forward if the upnp does not work and above all to perform the portforward really improves the online gaming experience?
If UPnP is not opening your NAT then port forwarding or DMZ will work. It’s not necessarily going to give you a better experience as it’s mostly just to ensure you are able to connect online properly.
a question about the IPs reserved by the router or manually on the device, what is the best practice to carry out and if both are used for the same device? or do you advise me to choose one of the two if so which one? I'm confused
Use only a reserved or static IP address per one device. Not both.
Recommended uses are for devices that don't need much router management, set static IP addresses ON devices. Devices like printers, controlllers, NAS, some phones, etc. For devices that need some router management, use reserved IP addresses for these. Devices like game consoles, some PCs and phones.
Set a default IP address pool, 192.168.1.100 to.200. Then use either side of this pool for static IP addressed devices. The pool is used for reserved IP addresses.
a question about the IPs reserved by the router or manually on the device, what is the best practice to carry out and if both are used for the same device? or do you advise me to choose one of the two if so which one? I'm confused
You don't need to reserve 100 IP addresses for your computer. Just give it a reserved address like 100 or 101. If you're setting a static IP (which is a different thing from a reserved IP!) then you should set it outside of that range, so 99 or 201
