Cisco CCNA: Understanding OSPF LSA Types In Depth

Clarify the difference between each one of OSPF LSA Types, Redistribution Metric & Type, and EIGRP Auto-Summarization

*** Part of the Full Course: Cisco CCNA to CCNP Transition ***

OSPF is in some way a complex protocol that has multiple pieces, and each one of these pieces has it own difficulty. One of the OSPF complex topics or puzzles for CCNA students is the LSA (or Link State Advertisements) Types. So what are those types? And how does each one of them differ from the other ? How are they generated? Which ones are restricted into the area and which ones pass through the area order? How does the OSPF cost be calculated based on the LSA types? How can we understand all of these things using show commands? How can you redistribute from OSPF to EIGRP and vice versa? What is the default metric when redistributing into OSPF and how to change it? What are the two types of OSPF redistribution metric and what is the difference between them? When should each type used? How does EIGRP Auto summarization work and how to disable it? Will classless networks be redistributed into OSPF by default? Why is the subnet keyword used when redistributing into OSPF?

In this course I will answer all these questions about LSA (or Link State Advertisements) Types. In addition, we will see how to set the OSPF redistribution metric & type, and how to understand the EIGRP Auto summarization and the subnet keyword. So join me in this course and be an OSPF champ!

Because this course is about OSPF and EIGRP, I have added a lab as a bonus, that will help you to understand how to troubleshoot those routing protocols.