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#11
Normally you would not use the WAN port on the secondary router and would plug those routers into each others LAN port, LAN port to LAN port, my entire network is set up this way which is two routers and a dedicated access point and I've set up literally thousands of networks this way as well.
You only need to disable DHCP on the secondary router then set up the secondary access point from it's newly acquired IP which it will eventually be picked up from the gateway router. This also puts everything into the same subnet.
I should also point out that it's much better to set up the secondary router as a wireless access point instead of a repeater. Repeaters only extend the gateway router's wireless range but they do this by splitting the bandwidth between the two.
For this reason I believe it's better to set up the secondary router as a stand alone wireless access point.
Thank you all, I'VE FINALLY MADE IT. After 3 hours of struggle it worked using StaticIP. I found 2 ways that I can connect the router, one was the same method that I've posted in the first post and second was to install DD-WRT and use repeater bridge.