What happens when using the 1 to 1 mapping of VNETs in Azure?

Using a 1 to 1 mapping of VNETs in Azure results in limited scalability. This setup means that for each virtual network (VNET), there is a direct, single mapping to another resource, such as a network or a region. While this might simplify some configurations and make management straightforward, it inherently restricts the ability to expand the network architecture efficiently.

In a multicloud or hybrid environment, scaling out may require significant restructuring if the VNETs are tightly coupled. For instance, if one VNET becomes a bottleneck or requires increased capacity, the existing 1 to 1 relationship does not allow for easy adjustment or improvement. As a result, organizations may find themselves limited in their ability to scale their applications and infrastructure as demand grows.

The other aspects of flexibility, redundancy, and performance can be influenced by how the networking is designed, but in a strict 1 to 1 mapping scenario, the inability to scale efficiently is the predominant concern. Thus, understanding the trade-offs in network design is essential for maintaining both current needs and future growth potential.