broadcast hop

Hello Digi Support,
I want to reduce the broadcast hop range from max. to 1 hop.
I tried already to set BH=1, but it doesn’t solve the problem. I can see still the broadcast message on ZigBee x hops away!
Do I have to make a change on all the other controller, that they shouldn’t send the broadcast message?
I thought there is a hop counter in the messages, which will block the message after the first hop.

Thank you