VMware has banged the drum loudly about security as a top use case for its NSX network virtualization platform via micro-segmentation. At VMworld this week, the vendor previewed another use case for NSX based on its Cross-Cloud Architecture that will enable customers to create and manage a unified network across private and public clouds.

Creating a unified network across different clouds has been difficult. There are different IP address ranges for each cloud, independent control planes and management programs, and separately defined policies for enforcing security, such as security groups in AWS. By stretching an overlay network across different clouds, it’s possible to have a unified IP range that runs across a private cloud and AWS, a centralized UI, and a uniform security policy.

Network overlays like NSX solve this problem by offering a logical abstraction of a network. Regardless of the physical network characteristics, a common logical network is laid across these different clouds.