Which virtual networks can you peer to vnet1?
You can peer VnetA and VnetB from Adatum.com to Vnet1 from Contoso.com.
Virtual Network Peering in Azure
Virtual Network Peering in Microsoft Azure allows for secure communication between Azure Virtual Networks, enabling resources from different networks to communicate with each other. In the scenario provided, Contoso, Ltd. has an Azure subscription linked to an Azure AD tenant named contoso.com. The subscription includes virtual networks Vnet1, Vnet2, and Vnet3 deployed in East US and West US locations.
When Contoso acquires A. Datum Corporation, which has an Azure subscription with an Azure AD tenant named adatum.com containing virtual networks VnetA and VnetB in East US and West US locations, respectively, the question arises as to which virtual networks can be peered to Vnet1 in Contoso's Azure subscription.
To establish a peering connection with Vnet1, the virtual networks must be in the same Azure region. Vnet1 can peer with VnetA from Adatum.com as both are deployed in the East US location. This peering connection allows for communication between the resources in Vnet1 and VnetA, facilitating cross-tenant communication.
To create a peering connection, you can utilize the PowerShell command "New-AzVirtualNetworkPeering" to establish the link between Vnet1 and VnetA. This connection enables resources from both virtual networks to communicate securely within the Azure environment.
It's important to note that Virtual Network Peering does not support peering across different Azure regions. Therefore, Vnet1 from Contoso, Ltd. cannot establish a peering connection with VnetB from Adatum.com, located in the West US region. Similarly, Vnet1 cannot peer with Vnet3 from Contoso, Ltd., which is also deployed in the West US location.
By understanding the constraints of Azure Virtual Network Peering and leveraging the appropriate tools such as Network Security Groups and Azure Firewall, organizations can ensure secure and seamless communication between virtual networks within the same region.