Part 1: Laying the Physical Foundation

Before diving into OSPF adjacency states and Link-State Advertisements (LSAs), we require a physical baseline. Part 1 establishes our 6-node Nokia SR OS environment in Containerlab, laying down the physical interfaces, point-to-point /30 subnets, and system loopbacks needed before bringing up dynamic routing. CLI Note: All configuration snippets and output examples in this series are written using Nokia SR OS MD-CLI (Model-Driven CLI). If you are adapting these examples for Classic CLI, context paths and edit modes will differ. ...

September 4, 2026