Configuring Node-Link Protection for OSPF You can configure node-link protection on any interface for which OSPF is enabled. Node-link protection establishes an alternate path through a different routing device altogether for all destination routes that traverse a protected interface. Node-link protection assumes that the entire routing device, or node, has failed. The Junos OS therefore calculates a backup path that avoids the primary next-hop routing device. Node-link protection is supported on: OSPFv2 and OSPFv3 interfaces OSPFv3 unicast realms OSPFv2 unicast topologies All routing instances supported by OSPFv2 and OSPFv3 Logical systems To configure node-link protection for an OSPF interface: Include the node-link-protection statement at the [edit protocols (ospf | ospf3) area area-id interface interface-name ] hierarchy level. Best Practice: You must also configure a per-packet load-balancing routing policy to ensure t...