OSPF Routers share routing information using Link State Advertisements, or LSAs. There are 5 main types of OSPF LSAs, and all of them are used to populate a Router's the Link State Database (LSDB).

In this video, we illustrate and explain the 5 main types of OSPF LSAs:

Type 1 LSAs - Router LSA
Type 2 LSAs - Network LSA
Type 3 LSAs - Summary LSA
Type 4 LSAs - ASBR Summary LSA
Type 5 LSAs - External LSAs

This is lesson 9 of the Practical OSPF series. The full series is available here:
   • Practical OSPF  

00:00 - Lesson 9, 10, 11, and 12 - OSPF LSAs Types
00:50 - Topology Introduction
01:15 - Type 1 LSAs - Router LSA
02:00 - Type 2 LSAs - Network LSA
02:26 - Simple Illustration of Type 1 and Type 2 LSAs
05:19 - Type 3 LSAs - Summary LSA
08:41 - INTRA Area Routes vs INTER Area Routes vs External Routes
09:36 - Type 5 LSAs - External LSA
11:11 - Type 4 LSAs - ASBR-Summary LSA
13:29 - Summary / Outro / Next Lesson

=== PRE-REQUISITES ===

LSAs and LSDBs:
   • OSPF Framework & OSPF Packets:  LSDB,...  

OSPF Areas and OSPF Types of Routers:
   • OSPF Areas and OSPF Types of Routers ...  

Designated Routers and Backup Designated Routers (DR / BDR):
   • Designated Router // Backup Designate...  


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🎯 Full Practical OSPF Series ➡️ pracnet.net/ospf:
   • Practical OSPF