Hi @Steve_Richards,
May I ask that you please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
I was hoping for now you could use the directions found here and send us over a set of logs using a shared Dropbox link. We will need the logs for the Core machine.