Example of LAN with two routers:
Essential for multi-router setup -- two routers are set to different IP addresses:
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wired router -- 192.168.1.1
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wireless router -- 192.168.2.1
Wireless router is connected to one of the wired router's LAN ports via a normal UTP patch cable
Wireless router's wired LAN IP is shown as 192.168.1.100, but it could be any IP address in the 192.168.1.X subnet of the wired router's dynamic IP range.
It is best to set wireless router to be a DHCP client, so it can obtain its IP on the wired LAN port automatically.