Virtual Network Gateway – Gateway subnet – SKU and Connectivity
What is VPN Gateway?
A VPN gateway is a specific type of virtual network gateway that is used to send encrypted traffic between an Azure virtual network and an on-premises location over the public Internet. You can also use a VPN gateway to send encrypted traffic between Azure virtual networks over the Microsoft network. Each virtual network can have only one VPN gateway. However, you can create multiple connections to the same VPN gateway. When you create multiple connections to the same VPN gateway, all VPN tunnels share the available gateway bandwidth.
What is a virtual network gateway?
A virtual network gateway is composed of two or more virtual machines that are deployed to a specific subnet you create, which is called the gateway subnet. The VMs that are located in the gateway subnet are created when you create the virtual network gateway. Virtual network gateway VMs are configured to contain routing tables and gateway services specific to the gateway. You can’t directly configure the VMs that are part of the virtual network gateway and you should never deploy additional resources to the gateway subnet.
Creating a virtual network gateway can take up to 45 minutes to complete. When you create a virtual network gateway, gateway VMs are deployed to the gateway subnet and configured with the settings that you specify. One of the settings you configure is the gateway type. The gateway type ‘vpn’ specifies that the type of virtual network gateway created is a VPN gateway. After you create a VPN gateway, you can create an IPsec/IKE VPN tunnel connection between that VPN gateway and another VPN gateway (VNet-to-VNet), or create a cross-premises IPsec/IKE VPN tunnel connection between the VPN gateway and an on-premises VPN device (Site-to-Site). You can also create a Point-to-Site VPN connection (VPN over IKEv2 or SSTP), which lets you connect to your virtual network from a remote location, such as from a conference or from home.
When you create a virtual network gateway, you specify the gateway SKU that you want to use. Select the SKU that satisfies your requirements based on the types of workloads, throughputs, features, and SLAs.
Gateway SKUs by tunnel, connection, and throughput
|VpnGw1||Max. 30||Max. 128*||650 Mbps|
|VpnGw2||Max. 30||Max. 128*||1 Gbps|
|VpnGw3||Max. 30||Max. 128*||1.25 Gbps|
|Basic||Max. 10||Max. 128||100 Mbps|
– Source : Microsoft Official