In the Huawei SD-WAN Interconnection Solution,enhanced BGP EVPNis used as the core control-plane technology to distribute not only traditional routing information but also SD-WAN–specific service and tunnel-related data. This enhancement allows centralized control and automated service deployment across branch and hub sites.
TNP routesare one of the key information types transmitted through enhanced BGP EVPN. TNP (Transport Network Plane) routes describe the reachability of transport tunnels between SD-WAN nodes and are essential for establishing and maintaining overlay connectivity across different transport networks such as Internet, MPLS, or LTE.
IPsec SA (Security Association) informationis also carried through enhanced BGP EVPN. This allows SD-WAN devices to dynamically establish secure IPsec tunnels without manual configuration, ensuring encrypted communication between sites while supporting fast deployment and scalability.
In addition,service routesare distributed using enhanced BGP EVPN. Service routes identify application or service-level reachability and enable intelligent traffic steering, policy-based forwarding, and service chaining across the SD-WAN fabric.
GRE configuration, however, is not transmitted through enhanced BGP EVPN. GRE parameters are typically configured locally and do not belong to the control information exchanged by EVPN in the Huawei SD-WAN solution. Therefore, the correct information types are TNP routes, IPsec SA information, and service routes.
