Need help understanding unraid network and routing

[lusitopp]

Hi, 

 

In my unraid setup i have 4 NICs, no bonding.
I have one docker on host network (plex).
Then i have one VM on br0 (eth0).
Then i have the rest of the dockers/VMs and also my workstation vm on br1 (eth1).
I then have a pfsense that uses br2 (eth2) and br3 (eth3).

My problems started with me trying to install wordpress and mariadb, i gave each a fixed ip on the br1 network.

I then learned that docker1 can't talk with docker2 without custom network.
i then created a custom network, but i couldn't create it on br1/eth1. Dont know if it is possible or not.

Now the problem was that my workstation, still on br1, could not access the wordpress website that is sitting on a custom network on br0.

 

Why can't my vm on br1 talk with a docker on a custom network without the need to be on the same interface?

i have my docker for adblock on br1, and to my knowledge all my devices have been able to use that as DNS. regardless if its on br0,1,2.

 

So, I'm confused about the routing and the rules internally in  Unraid, how should it be done so a VM on br1 can talk to a docker on br0 etc?