Problem with internet connection on LEDE 17.01

[hnyman]

That was not much helpful. Pretty much a picture about the end-result of the config above.

@hnyman

What is your targeted topology?

I repeat my previous question: how should your network infra look like?
"main router" + LEDE router providing wifi?

I have a feeling that you are trying to complicate things a bit too much, and we are now looking at config details, when your basic overall network plan is faulty.

If you are just looking for a secondary wifi access point with the LEDE router, without needing to have it actually do any actual routing / firewalling and your main router handles firewall and DHCP, you should likely just follow the "dumb AP" guide:

Wireless Access Point (aka "Dumb" Access Point)

or

Not accessible after disabling DHCP

Just to complement the previous advice: remember to also set the gateway and DNS address on the new dumb AP. Otherwise the router itself will be unable to access internet (although clients connected via it will be, as they use DHCP to get address from the main router.) Old advice written by me: If you connect the two routers using a fixed connection between LAN ports, the whole thing is ridiculously easy, as you can dumb down the APs. (The key to making things really easy is to NOT use the WAN…

Note that as your main router has 192.168.0.1, your LEDE router should have e.g. 192.168.0.2 or 192.168.0.3 or ... And then your can keep the netmask normal 255.255.255.0 in both router.
(right now you might e.g. have a wrong netmask 255.255.225.0 in the main router, as 255.255.0.0 is required due to you using both 192.168.0.x and 192.168.1.x)

But please tell us what is your end goal.