Im very new to this router and need to find out how the modem/router can replicate functionality I Had when I was using a separate TG582n.
So im on FFTC so my internet comes in via ppp1.1 pppoe_0_1_0.101 PPPoE on the internet side, then the router has a LAN ip of 192.168.0.x
On the TG582n the router could appear on different ranges such as 192.68.0.x but also 192.168.1.x (all on the same lan physical lan port) and whilst I have found interface grouping, which could allow me to create the 192.168.1.x range, the hardware runs over the same cables/switches. So my understanding is that inorder for the router to provide traffic on the 192.168.1.x range, without using interface grouping, I will need to add a static route under advanced setup > routing > static route.
Am I right in thinking that to get this working id need to add
Ip verison : ipv4
destination ip/prefix would be 192.168.1.0 (ie the lan range for 192.168.1.0 - 192.168.1.254)
Interface would be LAN/br0 (as im only routing traffic for machines on 192.168.1.x range outbound to ppp1.1 pppoe_0_1_0.101 PPPoE, and the 192.168.1.x range is connected on LAN0 on the back of the router via Ethernet cable)
Im not to sure about metric or gateway however ? would the gateway be the LAN ip of the AXL on the 192.168.1.x range ?
Please do feel free to ask any questions, worse case scenario I wil draw up a visio diagram

Cheers