Also, unsupportable.
If I need to extend WiFi I will use a second router as a WAP but I am guessing you used the WAN port on the second router so you find a lot of unanswered questions on that setup.
Hi
I have two router back to back connected but the arp is not getting resolved. please let me know how to trouble this

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic