8/9/2023 0 Comments Bgp full mesh![]() In other words, no matter which RAS Gateway VM in the CSP datacenter terminates the site-to-site VPN tunnel for a tenant site, the eBGP Peer for all the tenant sites is the Route Reflector.why is a iBGP connection between two routers that don't have eBGPĬonnections needed? They won't distribute anything, right? ![]() This is true regardless of the Enterprise tenant's tunnel termination points. If your Enterprise customers use BGP Routing in the Customer Address space, the RAS Gateway Route Reflector is the only external BGP (eBGP) neighbor for all of the sites of the corresponding tenant. This allows Network Controller to configure the required Hyper-V Network Virtualization policies on the tenant virtual network for End-to-End Data Path access. The Route Reflector performs route synchronization between all Route Reflector Clients so that the actual data path routing can occur.Ī Route Reflector does not provide services for the RAS Gateway upon which it is configured.Ī Route Reflector updates Network Controller with the enterprise routes that correspond to the tenant's enterprise sites. Tenant gateways other than the RAS Gateway Route Reflector are the Route Reflector Clients. When you add a new tenant to your datacenter, Network Controller automatically configures the first tenant RAS Gateway as a Route Reflector.Įach tenant has a corresponding Route Reflector, and it resides on one of the RAS Gateway VMs that are associated with that tenant.Ī tenant Route Reflector acts as the Route Reflector for all of the RAS Gateway VMs that are associated with the tenant. Providing tenants with connections to multiple RAS Gateways also introduces additional complexity in configuration at the enterprise end, where each tenant site will have separate routing neighbors.Ī BGP Route Reflector in the control plane addresses these problems and makes the CSP internal fabric deployment transparent to the enterprise tenants. This capability, however, introduces the additional complexity of route management and effective synchronization of routes between the tenant remote sites and their virtual resources in the cloud datacenter. This provides increased flexibility for Cloud Service Providers (CSPs) in situations where one RAS Gateway VM cannot meet all of the bandwidth requirements of the tenant connections. ![]() You can configure an individual tenant's remote access tunnels to terminate on more than one RAS Gateway virtual machine (VM). The Route Reflector learns all routes, calculates best routes, and redistributes the best routes to its BGP clients. When you use Route Reflector, however, the Route Reflector is the only router that connects with all of the other routers, called BGP Route Reflector clients, thereby simplifying route synchronization and reducing network traffic. With full mesh synchronization, all BGP routers must connect with all other routers in the routing topology. It does not, however, participate in data plane routing. A Route Reflector in a Software Defined Networking deployment is a logical entity that sits on the control plane between the RAS Gateways and the Network Controller. Applies to: Azure Stack HCI, versions 22H2 and 21H2 Windows Server 2022, Windows Server 2019, Windows Server 2016īorder Gateway Protocol (BGP) Route Reflector is included with Remote Access Service (RAS) Gateway and provides an alternative to BGP full mesh topology that is required for route synchronization between routers.
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