Cisco SD-WAN Legacy Data Centre: OSPF Redistribution Without Loops

Not every data centre is a fabric. When the core already runs OSPF, the Cisco SD-WAN routers join it. We walk the two-way redistribution between OSPF and OMP, show how the down bit stops two routers from looping routes, and cover how OSPF notices a failure at its default timers. Chapters 00:00 Legacy data centre: SD-WAN joins OSPF 01:23 When to use OSPF instead of BGP 01:58 The data centre in SD-WAN Manager 02:30 Per-VPN sub-interfaces and OSPF 03:10 Two-way redistribution: OSPF and OMP 03:51 How the down bit prevents routing loops 04:39 How OSPF detects failures 05:11 Best practice Learn more (Cisco documentation) Cisco Catalyst SD-WAN Design Guide: https://www.cisco.com/c/en/us/td/docs... OSPF down bit (background): https://www.cisco.com/c/en/us/support... Recorded in the lab in October 2026. Lab software: Cisco Catalyst SD-WAN Manager 26.1.2.1; WAN Edge routers on Cisco IOS XE 26.1.1.