How do assign a 2nd pppoe as the gateway for a certain subnet?

[trendy]

@jyc860923

I've tried putting the IP I got from that connection, say 10.0.0.1 into the "IPv4 gateway" box, but the clients under LAN3 are still routed through my default gateway, i.e. the internet.

Remove that.

@jyc860923

So the question is, what did I do wrong?

You need to do Policy Based Routing and you have 3 options:

1. mwan3 package
2. pbr package
3. a set of rules/routes for each internet connection.