@gayad
There are 5 valid reasons for getting your own ONT:
1. You want SFP or something with a smaller form factor, i.e., aesthetics
2. You want something that uses lower power
3. Your ONT is utter garbage with broken bridge mode (Nokia/ZTE should be fine)
4. You want to get rid of ghost SSIDs that ISPs configure so their technicians can connect to the router with hardcoded passwords
5. You don't want your internet to go down when Airtel pushes a firmware update and commands a router restart from their side.
Bridge mode worked fine for me for many years for hosting Minecraft servers for friends with Dynamic IP and DDNS when I had a ZTE ONT.
When I got Genexis ONT, IPv6 was broken in bridge mode, I had CGNAT IPv4 and was facing random restarts.
Currently I'm using my own ONT with Dynamic IPv6 with DDNS for the same server hosting and it works fine too. I had to get my own ONT for all of the above 5 reasons but you can use bridge mode if you don't feel like spending a lot.
My only advice is please don't have them replace your Nokia router with Genexis. It is a lot worse.
There are 5 valid reasons for getting your own ONT:
1. You want SFP or something with a smaller form factor, i.e., aesthetics
2. You want something that uses lower power
3. Your ONT is utter garbage with broken bridge mode (Nokia/ZTE should be fine)
4. You want to get rid of ghost SSIDs that ISPs configure so their technicians can connect to the router with hardcoded passwords
5. You don't want your internet to go down when Airtel pushes a firmware update and commands a router restart from their side.
Bridge mode worked fine for me for many years for hosting Minecraft servers for friends with Dynamic IP and DDNS when I had a ZTE ONT.
When I got Genexis ONT, IPv6 was broken in bridge mode, I had CGNAT IPv4 and was facing random restarts.
Currently I'm using my own ONT with Dynamic IPv6 with DDNS for the same server hosting and it works fine too. I had to get my own ONT for all of the above 5 reasons but you can use bridge mode if you don't feel like spending a lot.
My only advice is please don't have them replace your Nokia router with Genexis. It is a lot worse.