I got it to work with a little trick, using nonstandard subnet masks: The primary router's internal LAN is set to: - Router IP: 192.168.1.252 - Mask: 255.255.255.0 The secondary router is connected through its WAN port to the primary. Its internal LAN configuration is set to: - Router IP(secondary router): 192.168.1.1 - Mask: 255.255.255.128 Its WAN Configuration is set to: - Gateway: 192.168.1.252 (The primary router) - Mask: 255.255.255.240