OSPF LSA Type Part 1

Following is the OSPF Toplogy to Explain Various Area & LSA Type.

LSA Type-1 : Let's Look at the LSA Type-1 From R14 at Area 1.

As you Can see Type1/LSA is Generated By Each Routers(in Our case,R14,R1) in that Particular Area 1. Above Figure shows R14 View of Area 1.

LSA Type-2 : Let's Look at the LSA Type-2 Which is Generated by DR on Multi-Access Segment. Though We do not have Any Other Router b/w R14 & R1 in Area-1. I did not change OSPF Network Type/Default Brodcast so I can show LSA Type-2. Following Type-2/LSA shows it's Generated by DR : in Our case it's R1/12.12.121.1 & Note Network Mask /24.

LSA Type-3 : Let's Look at the LSA Type-3 Which is generated by ABR/Area Border Router. In Our Case it's R1/12.12.121.1.