Confused with mqtt broker on rpi2-hassio

I cant believe im still confused with this but here is the thing. I have an rpi2 with hassio. I use the lovelace interface ui. I use it with some toggle switches to send mqtt messages to an rpi3.

I can never remember who is the broker.

On my configuration.yaml on rpi2/hassio i have a definition line for mqtt where broker is .113 (my rpi3).

But i think i have installed a mosquitto broker via the terminal either on rpi2 or rpi3.

I would think my broker is my rpi2/hassio which is .117.

Install an exteranl tool MQTT Explorer for windows is a good one.

Connect to both brokers. See what you have set to which broker. It’s likely you have 2 brokers and have your messages split between them…but it should be obvious by observing which devices just aren’t working…