Configure Azure Virtual WAN

The Contoso IT team has various choices about how best to implement networking services in a hybrid environment. Azure Virtual WAN is a service that consolidates many of these networking services, and provides a consistent operational interface to network security, routing, and infrastructure.

What is Azure Virtual WAN?

Azure Virtual WAN is a networking service. It brings various networking, security, and routing functionalities together into a single operational interface. You can implement Azure Virtual WAN to support the following functionalities:

  • Branch connectivity
  • S2S VPN connectivity
  • P2S VPN (remote user) connectivity
  • Private (ExpressRoute) connectivity
  • Intra-cloud connectivity (transitive connectivity for VNets)
  • VPN ExpressRoute inter-connectivity
  • Routing
  • Azure Firewall
  • Encryption for private connectivity

You can think of the Azure Virtual WAN architecture as being similar to a wheel, with a hub (Azure regions) and spokes (the functionalities previously listed).

A diagram depicts the hub and spoke nature of Azure Virtual WAN. The hub is at the center, and is surrounded by ExpressRoute, S2S, P2S, and VNet connections to a head office, branch offices, remote users, and VNets.

There are two available Azure Virtual WAN types, as described in the following table.

Virtual WAN type Hub type Available configurations
Basic Basic S2S VPN only
Standard Standard ExpressRoute, P2S VPN, S2S VPN, and VNet-to-VNet through the virtual hub

Configure a Virtual WAN

The following table describes the components that you must configure to implement Virtual WAN.

Component Description
Virtual WAN A virtual WAN represents a virtual map of your Azure network, and is a collection of multiple resources containing links to the virtual hubs within the virtual WAN.
Virtual Hub A virtual hub is a Microsoft-managed VNet that contains various service endpoints to enable connectivity.
Hub virtual network connection You use the Hub VNet connection to connect the hub to your VNet.
(Preview) Hub-to-Hub connection All hubs are all interconnected in a virtual WAN.
Hub route table You create a virtual hub route and apply the route to the virtual hub route table.
Site Site represents your on-premises VPN device and its settings, and is used only for site-to-site connections.

To configure create an S2S connection with Azure Virtual WAN, you must complete the following high-level steps:

  1. Create a virtual WAN.
  2. Create a hub.
  3. Create a site.
  4. Connect a site to a hub.
  5. Connect a VPN site to a hub.
  6. Connect a VNet to a hub.
  7. Download a configuration file.
  8. Review your virtual WAN.

While some of these steps are detailed in the following sections, you can also find additional information on how to implement this solution at Tutorial: Create a Site-to-Site connection using Azure Virtual WAN. You'll also find more information about how to interpret the required settings for each of the steps in the following sections.

Create a Virtual WAN

To create a Virtual WAN, in the Azure portal, use the following procedure:

  1. Select Add a resource.

  2. Search for and select Virtual WAN.

  3. On the Virtual WAN page, select Create.

  4. on the Create WAN blade, select the Subscription, Resource group, and Location details.

  5. Enter a Name, and then select the Type.

  6. Select Review + create, and then select Create.

    A screenshot of the Create WAN blade, Basics tab. The administrator has configured the basic properties of subscription, resource group, and location. The Name is defined as ContosoVirtualWAN, and the Type is Standard.

Create a hub

To create a hub:

  1. Connect to the Virtual WAN you just created.

  2. Under Connectivity, select Hubs.

  3. On the toolbar, select + New Hub.

    A screenshot of the Basics tab on the Create virtual hub blade. The administrator has selected the Region (East US) and entered the Name ContosoVH1. The hub private address space is 10.10.0.0/16..

  4. Configure the settings described in the following table.

    Tab Settings
    Basics Select the virtual hub's Region, enter a Name, and configure the Hub private address space.
    Site to site If you want to enable S2S, select Yes, and then select both ASN and Gateway scale units.
    Point to site If you want to enable P2S, select Yes, select Gateway scale units, and then select a Point to site configuration. Also enter the Client address pool.
    ExpressRoute If you want to enable ExpressRoute, select Yes, and then select Gateway scale units.
    Routing If you plan to use routing, then enter the If destination prefix is and Send to next hop address information.
  5. Select Review + create, and then select Create.

Create a site

Use the following procedure to create a site.

  1. From the Virtual WAN page, under Connectivity, select VPN sites.

  2. On the toolbar, select + Create site.

  3. On the Create a VPN site blade, configure the settings described in the following table.

    Tab Settings
    Basics Select the site's Region, enter a Name, and then enter a Device vendor. Enable or disable Border gateway protocol, and then enter the Private address space.
    Links Add the required links to the Links tab. Specify Link name, Provider name, Speed, IP address, BGP address, and ASN.
  4. Select Review + create, and then select Create.

Connect a VPN site to a hub

Use the following procedure to connect your VPN site to the hub.

  1. In the Azure portal, select the site you just created, and select Connect VPN sites.
  2. Enter a pre-shared key.
  3. Select the appropriate option for Propagate Default Route. (The Enable option allows the virtual hub to propagate a learned default route to this connection.)
  4. Select Connect.

Connect a VNet to a hub

Use the following procedure to create the connection between the hub and a VNet.

  1. On the page for your virtual WAN, select Virtual network connections.
  2. On the Virtual network connection page, select +Add connection.
  3. On the Add connection page, complete the following fields, and then select OK:
    • Connection name
    • Hubs
    • Subscription
    • Virtual network