Question

Your company has 12 VNets spread across East US and West Europe. All VNets must be able to communicate directly with each other with full mesh connectivity, and new VNets added to a specific group must automatically gain the same connectivity without manual peering changes. You want the lowest ongoing administrative effort. Which approach should you implement?

Accepted Answer

Create an Azure Virtual Network Manager mesh connectivity configuration on a network group containing the VNets, with cross-region connectivity enabled

Answer

Manually configure VNet peering between every pair of VNets and update peerings each time a VNet is added

Answer

Deploy an Azure Route Server in each region and rely on BGP to advertise all VNet routes between regions

Answer

Create a hub VNet with an Azure Firewall and route all inter-VNet traffic through the hub using user-defined routes