In this video, Russ covers OSPF areas, LSAs, and their function with the OSPF topology. Learn how areas and LSAs work within the OSPF environment to share information efficiently.
- [Instructor] All right, so OSPF is often compromised…of multiple areas.…Let's take a look at what these areas do…and why they are important.…Now, here we can see multiple areas of an OSPF topology.…On the left we have area one…and on the right we have area two.…In the center we see the backbone area or area zero.…Now, let's just break this down, right?…This particular topology needs to be dissected for us.…First thing I would like you to know is…by breaking up an OSPF topology,…that's how OSPF gets its scalability.…
We can go to large sizes…because we're creating communication limitations, okay.…We're not shooting our hellos…all the way across the topology here…from area one to area two.…That's just not how it works.…So, we are able to save on communication…by limiting to only those required routers,…so whoever needs to know, that's who we're going to update…and we'll talk more about this later,…but this is how we get the scalability.…We also create areas where we can summarize routes.…
So, here you see that the router straddling the line there…
Author
Released
10/30/2017- Static routing
- Dynamic routing
- Interior vs. exterior routing protocols
- InterVLAN routing
- OSPF routing
- EIGRP routing
- Other routing protocols
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 2s
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What you need to know2m 30s
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1. Routing
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Routing basics10m 12s
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Dynamic routing protocols3m 38s
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2. InterVLAN Routing
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Router on a stick6m 22s
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Configuration demo4m 34s
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Switch level routing2m 57s
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3. OSPF
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The basics of OSPF5m 2s
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Cost calculations5m 47s
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Areas and LSAs10m 45s
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OSPF configuration demo10m 42s
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OSPF troubleshooting6m 18s
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DR and BDR6m 53s
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Cost manipulation7m 23s
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4. EIGRP
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The basics of EIGRP6m 24s
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The EIGRP metric10m 20s
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Adjacencies6m 9s
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Load balancing5m 32s
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EIGRP configuration demo6m 30s
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5. Other Protocols
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RIP, BGP, and MPLS6m 57s
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Conclusion
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Next steps2m 33s
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Video: Areas and LSAs