Learn OSPF
Start with the big picture, follow the packets and add detail when you need it. No prerequisite bravado required.
01
BasicsRouter IDs, link-state thinking and the shortest path first.
02
NeighborsHellos, matching parameters and adjacency states.
03
DR / BDRWhy broadcast networks elect a spokesperson.
04
AreasArea 0, ABRs and a calmer link-state database.
05
LSAsThe messages that describe an OSPF topology.
06
Stub & NSSAControl external information at the area edge.
07
SPFHow the graph becomes a routing table.
08
TroubleshootingRead the states and follow the evidence.
09
OSPFv3OSPF for IPv6—and more than that.
Published guides
Looking for LSAs? →Choose your next hop.
0 routes learned
The first guide is being written.
The learning map is ready for OSPF basics, adjacencies, areas, troubleshooting and everything that follows.