main.cf update question on 2 node cluster

I have a quick quesiton regarding main.cf update.  Here are the steps I would like to do for 2 nodes cluster.

Node1:  hastop  -all

            cp   /etc/VRTSsvc/conf/confi/main.cf   main.cf.back

            cp  /etc/VRTSsvc/conf/confi/main.cf    /tmp/main.cf

            hastart -all

Is this right?  If so,  how broadcasting works?  When I start cluster at node1 would main.cf will copy to other nodes right? Is there a way node2 main.cf wil copy over to node1?  How does it determine which direction it needs to be copied?