It cuts down a lot of BS on the phone support lines when you use the correct terms and can have a sensible go at diagnosing the issue.

We dont use the CPE term often in the UK. It’s modem ONT router etc.

Have a look on www.bidb.uk and see what comes up.

It does support failover. It’s in the manual.

Go for 3. It’s a pain to get out of CGNAT on EE

Change the APN to 3internet on whatever board / modem you use and that should see you right for failover. I’m not sure you to config that on your particular HW though.

Right ???

I think the easiest thing to do would get a used 5G hub from the likes of fleabay, setup the BSD box for link fail over. What distro are you using ?

For double NAT issue getting a real IPV4 address is a chew using regular data Sims. The only one I’ve had long term success with is 3.

Sorry, I’m assuming your UK based ?

I’m one of those people into Omada. Yes it’s not sleek and shiny like unifi but it does an incredibly similar job for a cheaper price. Reliability has been very good for me. No returns or issues yet 🤞

For you I’d start with https://www.tp-link.com/uk/business-networking/omada-router-integrated-router/er7212pc/ it can easily be hidden away.

Add a https://www.tp-link.com/uk/business-networking/omada-wifi-ceiling-mount/eap650/

And / Or

https://www.tp-link.com/uk/business-networking/omada-wifi-wall-plate/eap650-wall/

And your away. Add another any APs you need to the POE switch on the router.

If you want recommendations on a switch let us know how many ports you need.

Your just pissing cash in the wind buying ancient HW like that. Why are you so keen to get WRT ?

That’s not a bad speed for copper tbh. Have a look on www.bidb.uk and see what comes up. If you need any advice just holla at us.

You don’t want traffic flowing across the router so stick to 1 wan 1 Lan and let the first switch figure it out. You could go either :

Modem - Router - Small switch - “Floor” Switches. Or Modem - Router - Poe Master Switch.

I’d stick to having a larger switch and running cables back to it into a patch panel or 2. But it’s a case of what’s going to be easiest for you.

You have the right idea and you are very nearly there.

You could wire everything back to the main switch in the basement or you could put a switch on each floor. Both have pros and cons, if planned properly you won’t notice any drop in speeds or network bandwidth.

A lot depends on your budget but I’d add another 👍for tplink Omada.

So your topology ideally goes like this.

Modem/ONT -XT9- switch - everything else.

But it’s fine to go

Modem/ONT -XT9 - XT9- everything else

I think a previous openreach enginner has disconnected all the extensions when that face plate was put on.

It’s quite common and reduces all the interference that screws with the broadband. Be warded if you move the router you will be in for a speed drop. Ideally you leave the router at the master socket and run ethernet to the PS.

For the sake of convenience and troubleshooting go all in on one brand. Mix and match might save you cash now but waste time in the future.

Omada is well priced and solid hardware. As others have mentioned the ER605 might cap out. The ER7206 might work better in the long term.