VVCR gives you the option to enable Persistent IP Addresses to keep the same IP addresses after stopping and starting the cluster.
If you don’t enable this, VVCR will generate new IP addresses every time you restart the cluster.
Click on the check box next to Use Persistent IP address in the cluster creation menu.
You have a limited number of addresses per region. This is determined by the number of elastic IP addresses enabled on your AWS account. By default, every account has 5 available addresses per region.
The number of available addresses in the selected region is displayed to the right of the checkbox.
Then if you restart the cluster, the stream will have the same IP Address.