Upgrade from TG582n to Hub One not working

[#1]

I have just received my hub one as an upgrade for my old TG582n but I am unable to setup my DHCP pool.

I have a number of devices that are attached to my internal network and I need to set-up a single class A network. But when I attempt to set the gateway and pool, the router says the IP addresses and mask is invalid.

I cannot run 16 class B or 256 class C networks, I need a single class A. why would the new router not allow a single class A network?

[#2 · Accepted solution]

OK. BIG PROBLEM. There is nothing stated anywhere on the website or from the sales reps to say that class A networks CANNOT be run on the Hub One. But the forums (which you have to search BEFORE you buy) have shown that BT has Blocked the class A networks.

They are still legal networks and are NOT RESERVED by anyone except BT. Therefore BT's statement that class A networks are reserved is false.

[#3]

Why if you have specialised requirements such as this would you go for any cheap ISP router and not buy a decent router?