In the Huawei SD-WAN solution, LAN-side devices (such as CPEs and aggregation routers) use various routing protocols to connect to Layer 3 networks and exchange routes dynamically. The supported protocols include:
✅ A. IS-IS (Intermediate System to Intermediate System)
✅ B. OSPF (Open Shortest Path First)
A widely used dynamic routing protocol for intra-domain (LAN) connectivity.
Commonly used in enterprise networks to connect SD-WAN edge routers to LAN networks.
✅ C. BGP (Border Gateway Protocol)
BGP is primarily used for WAN and internet connectivity, but it can also be used inside large enterprise networks for LAN-side routing.
BGP enables inter-domain routing and policy-based route control.
✅ D. RIP (Routing Information Protocol)
A legacy distance-vector protocol still supported in some networks for basic LAN routing.
Less preferred due to slow convergence and hop-count limitations.
Reference from Huawei HCIE-Datacom Documentation:
Huawei SD-WAN Deployment Guide – LAN-Side Routing Protocols
HCIE-Datacom Training Material – Routing Configuration in SD-WAN
