How do I set up my daisy chain of routers?

[Fred]

Totally incorrect configuration. NEVER use more than one router on the same network. It slows it down. It also causes many other problems like the one you have. It can cause disruption or even total loss of service at times. There is never any need for a second router on a normal home or small office network, whatever your problem was there would always have been a better method. Might have been better to ask advice on what you SHOULD have done first.