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)
* A link-state protocol often used in large enterprise networks for fast convergence and scalability.
# 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