Extending my 5G Network

[NOTTIES]

I have upgraded to Rain 5G.
Installed the 5G Outdoor CPE N5368X router with IP 192.168.8.1
I still have 2 x Huawei B618 routers that I want to use as Access Points.

The one B618 in the TV room, cable connected, works fine with the IP changed to 192.168.8.2 and DHCP disabled.
The AC1200 in the passage, wireless connected, works fine WPS connected to the B618 access point in the TV room.
The other B618 in the bed room, cable connected, does not want to work after setting IP to 192.168.8.3 and disabling the DHCP.
I have tried various setups but can not get it running.
Is there something I am missing?
Please assist.
I have attached a picture of the setup.

Thank you

 

[ENIAC]

What is the DHCP range, and are you sure no other device has taken 192.168.8.3?

 

[ENIAC]

Also, are you bridging the connections on the first B168?

 

[Rickster]

Must be on LAN to LAN, not WAN to LAN.

 

[newklear]

Oops, Notties had two threads on the go; Here