You are leading a project to migrate your company's on-premises infrastructure to Google Cloud. The migration will happen in multiple phases to ensure minimal downtime and disruption. During the migration period, you plan to use Cloud VPN to establish a secure connection between your on-premises systems and Google Cloud. It is crucial that all your on-premises systems remain accessible throughout the migration. What is the best way to configure your network in Google Cloud to ensure there are no IP address conflicts and maintain connectivity?