I am new with this beautiful openwrt system and i just installed the system on BT hub 5 on it but in my home i have normal talktalk latest wifi hub 2019 as my main broadband ( no openwrt on it )
.and i was looking to make that BT Hub 5 ( have openwrt on it ) as main router connecting to the talktalk as wifi extender using powerline adapter
Well, technically you want to use the TalkTalk as AP. Range extenders typically connect to the network witlessly, while in your case you will effectively interconnect the routers by LAN. There are different types of power-line kits, but a basic kit of 2 with 2 routers, it would be as if you are connecting bother routers by an Ethernet cable.
I don't know how far apart the 2 routers. For a small apartment, you could in theory connect the router wirelessly, but that's subject to firmware, chip sets and drivers etc. So it's probably easier to just use the powerline thing, but I am just mentioning the other option if you want to try it first. A factor would also would be weather you care if the clients of the "extender" are on a different subnet or not.
Note that for Powerline kits, some have devices with built-in AP function (so you could just get rid of the TalkTalk router if you have no other reason for using it. It's worth looking at what's available in the market and check your budget.
Before i buy bt hub 5 with preinstalled openwrt on it
I used to have talktalk broadband with two routers connecting using pwerline or tplink adapter and all i jave to do was disabled the DHCP in the second router
Now i am still have the talktalk broadband and i want to use the BT Hub 5 as the main or first router which have openwrt installed already then tplink connecting to second normal talktalk that have no openwrt on it and disable the DHCP like ibused to have before
Or its different and process is different
Thanks guys i wrote a lot juat to make you understand my problems
Ah, and it goes without saying that you would want the client router to have static LAN IP address on the the same network as main router (for example, give it IP 192.168.1.2 if your main router is 192.168.1.1), and make sure that the DHCP server pool on the the main router doesn't include that IP address. Default for OpenWrt is from x.x.x.100 to x.x.x.249, so it should be fine.