Types Of OSPF Areas And How They Affect The LSDB

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In this video we'll be moving away from configuring labs with Juniper Junos OS, and instead taking a look at the theory behind the OSPF area types. We'll go through what LSA' (Link State Advertisements) will be blocked and not blocked by the Stub, Totally Stubby, Not-So-Stubby (NSSA) and Totally-NSSA areas. In addition we'll learn how to configure the ABR (Area Border Router) for this OSPF feature.

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OSPF basics part 1

OSPF basics part 2

OSPF adjacency part 1

OSPF adjacency part 2

OSPF LSA types 1 & 2

OSPF deep-dive on OSPF LSA types 1 & 2

OSPF deep-dive on LSA type 3

OSPF deep-dive on LSA types 4 & 5

OSPF deep-dive on LSA type 7

OSPF area types and their impact on the LSDB

OSPF DR and BDR election process

OSPF Area Range explained

OSPF Path Selection Process

Troubleshooting OSPF

OSPF Virtual Link

#juniper #junipernetworks #switching #routing #ospf #technology #networking #learning

[Netcademy]

There is a rather embarrassing miscalculation around 11 minutes. There are in total 601 entries in Area 1s LSDB and not 501. I'll go back to primary school to learn basic maths soon - promise :)

[sris]

This is really helpful. Thank you so much! Just curious - are type 4 LSAs from areas 3, 4 and 5 also included in area 0 intra area LSA count of 100 or it would be additional three LSAs?