Join WIFI network with connected client LAN network

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http://superuser.com – Here is the home network plan: Router/modem, provided by ISP. Set on: Connected to my ISP, provides internet. WIFI router (Linksys E900). Connected to (1) with LAN cable (plugged in WAN port), set on It creates WIFI network and all my devices are connected to it. DHCP is turned on, starting from for max 50 devices. It is also a default gateway for all connected devices. Client AP (TPLink TL-WR743ND), works in 'AP Client Router Mode'. Set on Has 4 LAN ports for various devices (that can not connect to wifi, so must be connected via wire). (HowTos)