LAN Redundancy- Service Side

LAN Redundancy- Service Side 

When you have redundant WAN Edge routers and multiple Layer 3 devices behind them, you can run Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (EIGRP), or Border Gateway Protocol (BGP) to achieve failover redundancy.

Failover redundancy:

• Redundant WAN Edge routers

• OSPF, EIGRP, and BGP between WAN Edge routers and site routers

• Bidirectional redistribution between OMP and OSPF, EIGRP and BGP

  • Loop prevention

• Multipathing for remote destinations across the Cisco SD-WAN fabric

  • Can manipulate OSPF, EIGRP, and BGP to prefer one WAN router over the other

You can rely on the routing protocol’s built-in loop prevention mechanisms by using bidirectional redistribution between OMP and EIGRP, OSPF, or BGP. You can influence routing protocol metrics to load balance across multiple available paths through the SD-WAN fabric, to prefer one WAN Edge router as a next-hop router over the other for certain destinations.