Basic OSPF
OSPF is a link-state routing protocol. Link-state protocols use the shortest path first (SPF) algorithm to populate the routing table. OSPF shares information with every router in the network.
OSPF is considered a difficult protocol to configure and requires a thorough understanding of terms that are commonly used. Table 3-1 explains briefly the common OSPF terminology used throughout this chapter.
| Term | Description |
|---|---|
| Link state | Information is shared between directly connected routers. This information propagates throughout the network unchanged and is also used to create a shortest path first (SPF) tree. |
| Area | A group of routers that share the same area ID. All OSPF routers require area assignments. |
| Autonomous ... |
Get CCNP® Practical Studies: Routing now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
