Looking for a new router - 2 wired Xbox Series X

[Bookloverx]

I currently have an ASUS GT-AC5300 that worked really well up to a couple of weeks ago and now the NAT doesn’t stay open; goes to moderate now daily. I’ve reset and hard reset with the same results.

i need a router that will allow two Xbox Series X wired to the router and be able to play both at the same time in Call of Duty. I won’t be using the WiFi from it. I have an Orbi mesh for that.

 

[NoLight]

If your router supports Asuswrt-Merlin are you running the newest version with Secure UPnP Mode enabled? Have you manually assigned the IP for each Xbox? Have you set alternate ports on the different consoles? https://support.xbox.com/en-US/help/hardware-network/connect-network/advanced-network-settings