Azure Route Server Architecture

The Azure Route Server is a managed service that simplifies network routing between virtual machines in Azure Virtual WAN, on-premises networks, and other network appliances. It allows for dynamic route exchange using the BGP protocol, eliminating the need for manual configuration of route tables.

• Managed Service: Azure handles the underlying infrastructure, high availability, and scaling of the Route Server.
• BGP Routing: Leverages the Border Gateway Protocol (BGP) for efficient and dynamic route propagation.
• Simplified Connectivity: Seamlessly connects Virtual WAN hubs, branch offices, and Network Virtual Appliances (NVAs).
• Scalability and Resilience: Designed to handle large-scale routing needs with built-in redundancy.
• Cost-Effective: Reduces operational overhead and complexity associated with traditional routing solutions.

The architecture typically involves the Azure Route Server residing within an Azure Virtual WAN hub. It establishes BGP peering sessions with connected network devices, such as:

• Azure Virtual Machines: VMs deployed in VNets can advertise routes to and learn routes from the Route Server.
• Azure VPN Gateways and ExpressRoute Gateways: Facilitate connectivity to on-premises networks.
• Network Virtual Appliances (NVAs): Firewalls, load balancers, and other network appliances deployed in Azure can peer with the Route Server.
• On-Premises Routers: Via VPN or ExpressRoute connections, on-premises devices can exchange routes dynamically.

This centralized routing intelligence ensures that traffic flows efficiently and optimally across your hybrid cloud environment.