If the "use gateway" and "use remote gateway" options settings are enabled in Vnet peering(s) and the subnet the packets originating from is configured at the remote party side of the tunnel, then UDR is not needed. In my scenario, I have tested the latency with explicit peering between spokes in the same Azure region, and the average latency is 1ms. For details, see the Why are certain ports opened on my VPN gateway? Azure routes outbound traffic from a subnet based on the routes in a subnet's route table. Be able to network address translate and forward, or proxy the traffic to the destination resource in the subnet, and return the traffic back to the Internet. Vpn gateway is used to send the encrypted traffic across the public internet for this communication it requires a public IP. If the destination address is for one of Azure's services, Azure routes the traffic directly to the service over Azure's backbone network, rather than routing the traffic to the Internet. When multiple routes with Service Tags have matching IP prefixes, routes will be evaluated in the following order: To use this feature, specify a Service Tag name for the address prefix parameter in route table commands. When you create a virtual network gateway, you need to specify several settings. 4) Azure VPN Gateway deployed in the Hub virtual network. Please check the following quickstart guide to create a virtual network. You can't specify VNet peering or VirtualNetworkServiceEndpoint as the next hop type in user-defined routes. These routes are then automatically configured on the VMs in the virtual network. For more information about user-defined routing and virtual networks, see Custom user-defined routes. If you assign an address range to the address space of a virtual network that includes, but isn't the same as, one of the four reserved address prefixes, Azure removes the route for the prefix and adds a route for the address prefix you added, with Virtual network as the next hop type. Route traffic between two Azure site-to-site VPN locations When there's an exact prefix match between a route with an explicit IP prefix and a route with a Service Tag, preference is given to the route with the explicit prefix. It can be the Virtual network, the Virtual network gateway, the Internet, a Virtual appliance, or None. September 09, 2020, by Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, How-To Configure Virtual Network Gateway in AZURE, Do Azure virtual networks allow public addressing to sources in the VPN domain after connecting to the peer or Azure virtual network gateway, Azure - Virtual network Gateway vs VPN gateways, Adding a connection the Virtual Network Gateway. What are the advantages of running a power tool on 240 V vs 120 V? Connect and share knowledge within a single location that is structured and easy to search. Symmetric NAT support for RDP Shortpath on Azure Virtual Desktop using the Traversal Using Relays around NAT (TURN) protocol, now in public preview. This is also referred to as Peer-to-Peer transitive routing. Azure Route Server simplifies dynamic routing between your network virtual appliance (NVA) and your virtual network. For example, an organization may host an application server in a Spoke1 virtual network and a central database server in another Spoke2 virtual network. Why does the Azure Virtual Network Express Route Gateway require public The following table lists the names used to refer to each next hop type with the different tools and deployment models: An on-premises network gateway can exchange routes with an Azure virtual network gateway using the border gateway protocol (BGP). Routes with the VNet peering or VirtualNetworkServiceEndpoint next hop types are only created by Azure, when you configure a virtual network peering, or a service endpoint. How do I know that a Virtual Machine in Azure use the Local network gateway route to connect to an on-premise network? This topology contains a central "hub" virtual network connected to an on-premises network, via either a VPN gateway or an ExpressRoute circuit as shown in the diagram below. This allows you to restrict and inspect Internet access from your virtual machines or cloud services in Azure, while continuing to enable your multi-tier service architecture required. When outbound traffic is sent from a subnet, Azure selects a route based on the destination IP address, using the longest prefix match algorithm. This process can take 45 minutes or more to complete, depending on your selected gateway SKU. You can configure the BGP attributes in your NVA and, depending on your design (for example, active-active for performance or active-passive for resiliency), let Azure Route Server know which NVA instance is active or which one is passive. To deploy Azure Route Server with the General Availability offering, and to achieve General Availability SLA and support, please delete and recreate your Route Server. You need to select your virtual network and the subnet where your virtual machine(s) is deployed. However, I'm quite confused which kind of routing should I choose here: in order to be able to ping (connect) from VM B to on-prem VMs C/D. You need to set a "default site" among the cross-premises local sites connected to the virtual network. add option to set NSG and UDR on subnets in hub-vnet, Deploy the hubNetwork modue with azure firewall and a vpn-gateway. Explanations for the next hop types follow: Virtual network: Routes traffic between address ranges within the address space of a virtual network. To advertise custom routes, use the Set-AzVirtualNetworkGateway cmdlet. These virtual networks can be in the same region or in different regions (also known as Global VNet Peering). VNet1 has peered with the VNet2 network, and VNet2 has peered with VNet3, but VNet1 and VNet3are NOT connected. Highly Available s2s VPN -with Azure active-standby gateway. This topology supports on-premises networking while providing network segmentation and delegated administration. Routing Issue VNet to Vnet Peering with Site to Site VPN's on both Virtual network gateway: Specify when you want traffic destined for specific address prefixes routed to a virtual network gateway. Here again, we have divided the output in two halves (one per VPN gateway instance). When you create a Virtual Network Gateway, you need to specify several settings. Connect and share knowledge within a single location that is structured and easy to search. 2013 - 2023 Charbel Nemnom's Cloud & CyberSecurity, According to Microsofts official documentation, Again according to Microsofts official documentation (Spoke connectivity), following quickstart guide to create a virtual network, following guide to create a VPN gateway for your Hub VNet, following guide to add peering and enable transit, Virtual Network Peering Requirements and Constraints, Virtual Network Peering frequently asked questions (FAQ), https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-udr-overview. With ExpressRoute, you can establish connections to Microsoft cloud services, such as Microsoft Azure and Microsoft 365. November 28, 2022, by with on-premises. Quick comparison of Azure VPN Gateway and ExpressRoute stephaneeyskens You can advertise custom routes using the Azure portal on the point-to-site configuration page.