LAN-WAN setup with two routers

[AveAdvenae]

1. Main router is an EdgeRouter X

WAN: ..ip from ISP
LAN: 192.168.1.1

2. WAN port of RT-AC2900 running Asuswrt-Merlin is connected to EdgeRouter. Both wireless channels enabled. WAN and NAT enabled, DHCP disabled.

WAN: nothing
LAN: 192.168.100.1

Only wireless clients connecting to RT-AC2900 have internet access.

I have tried to add a static route, but no success.

Yes, if I create a LAN-LAN, making a dumb AP of the RT-AC2900, everything works, but I want daemons running on the Asus with internet access, e.g. OpenVPN.

> brctl show
bridge name.....bridge id.........................STP enabled.....interfaces
br0...................8000.b06ebf65b4c8.......yes ...................eth1
......................................................................................eth2
......................................................................................eth3
......................................................................................eth4
......................................................................................eth5
......................................................................................eth6
br0 has the inet address 192.168.100.1 but eth0 is empty.

Why is the RT-AC2900 in bridge mode? Only the DHCP is disabled, running it in wireless router mode. Reboot didn't help. (EdgeRouter has DHCP enabled).

 

[AveAdvenae]

Ok, got it working now, but had to restore the RT-AC2900.

After the restore I disabled DHCP and changed LAN IP to 192.168.100.1. After receiving a WAN address from the upstream EdgeRouter I added the following static route:

Network/Host IP Netmask..........Gateway.....Interface
192.168.100.1....255.255.255.0 192.168.1.1 LAN

and it seems to work.