Please refer to attached diagram.
R2 & R3 connect to R1 via E1. R1 LAN public IP address is connect to Internet router.
Host with private IP at R2&R3 LAN need to access to Internet.
I wolud like to make the R1 as aggregate router, where it route to internet and perform NAT for all the remote router R2/R3 host.
R2/R3 perfrom transparent bridging on interfaces (LAN & E1)
R1 E1 interface configure with IP. IP NAT perform on R1 to NAT private to public for Internet access.
Please advice does this design requirement work ?