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you don't have to sync neutron configuration files between controllers, you should use a configuration management tool (ansible, RDO TripleO, mirantis Fuel, your hand) to properly configure them, because in these files there are some specific configuration value, for example on neutron.conf you have:

host = neutron-n-2 <-- YOUR NEUTRON HOSTNAME

bind_host = <-- YOUR CONTROLLER IP

Regards, Amedeo