@TJ39 Thanks very much for all the details you've provided now. We will try to investigate this issue and see if there is anything we can do with the current router firmware. Good days.

@lfalcao Hi, thanks a lot for your details. I understand it now: If you configure the Deco M5 as a Router and disable IPv6 on it, all is good; If you configure the Deco M5 as a Router and enable IPv6...

@MuddyWater Hi, the TP-Link DSL modem routers can be changed to bridge mode, such as VR400 and VR600: https://www.tp-link.com/uk/home-networking/dsl-modem-router/?filterby=5810 Below is the guide to...

@c.st Hi, glad to hear that it works, congrats.^_^ If need any further help, just let us know. Good day~

@Daz5894 Hi, by AC1200, do you refer to VR400? May I know the exact model for TP-Link 300? Generally, the VR400 can be set up into a bridge mode and we can dial-up or set up the internet on the main...

@MuddyWater Hello, We may need to say sorry that we cannot give you a recommendation for the gigabit modems that can be configured into a bridge mode, as different ISPs may have different limitation...