SD-Access Underlay: Manual vs LAN Automation
The SD-Access underlay is just a well-built IGP giving every fabric node loopback reachability. Compare building it manually vs with LAN Automation, and see what truly needs Catalyst Center.
IS-IS
The link-state protocol running quietly inside service provider cores. Articles tagged IS-IS cover levels and areas, NET addressing, adjacency formation, and how it compares to OSPF in practice.