Monthly Archives: January 2023

1. Introduction You’ll learn about VLANs virtual local area networks. Before we get to them, I’m going to give you information about the standard way to do a design for your campus local area network. We’ll discuss the core distribution and access layers, what they mean and how they fit into the design. Once we’ve […]

12. OSPF DR and BDR Lab Demo In this lecture you’ll learn how the OSPF, Dr and BDR designated routers work with a lab demo. You can see the lab topology diagram here. So I’ve got my four routers r six, R seven, R eight and R nine. They’ve each been configured with a loopback […]

10. OSPF Adjacencies This lecture, you’ll learn how OSPF routers form adjacencies with each other and build your link state databases. Let’s start with a recap of OSPF operations as you saw near the start of this section. So when you enable OSPF on a router, first off it will discover its OSPF neighbors, it […]

7. Bandwidth vs Clock Rate and Speed In the next lecture you’ll learn about how the OSPF cost metric works and how it’s based on interface bandwidth by default. But before we get there, I want to explain how the bandwidth command works and what it does and how it relates to the speed and […]

4. OSPF Basic Configuration Lab Demo In this lecture, you’ll learn how to do a basic configuration of OSPF on our Cisco routers. So to enable OSPF, the top level command at Global Config is router OSPF and then a process ID. So you can see an example here. I’ve said router OSPF One. Different […]

1. Introduction Section, you’ll learn about the last of our IGPs, our interior gateway routing protocols for the CCNA exam. That’s OSPF, the open, shortest path first protocol. We’ll start with a description of the characteristics of OSPF, and then we’ll move into doing basic configuration. After that, we’ll cover some more advanced topics like […]

4. Layer 3 Switch Learn about the third and last option for interval and routing, which is to use a layer three switch. Now you’re less likely to get tested on this option in the CCNA exam, but it’s actually the option which is most commonly used in the real world. So I wanted to […]

1. Introduction Section, we covered all of the layer two configuration for VLANs, but when we left off, our clients that were in different VLANs weren’t able to communicate with each other at layer three, so you’ll learn how to do that. In this section, there are three different options you can use for your […]

4. EIGRP – the Enhanced Interior Gateway Routing Protocol You’ll learn about the characteristics of EIGRP, and we’ll do a basic configuration as well. So EIGRP stands for the Enhanced Interior Gateway Routing Protocol. Its predecessor was iGRP, but that’s a really old legacy protocol. It’s not used anymore. EIGRP is great protocol, sports large […]

1. Introduction In this section you’ll learn about rip and EIGRP. It’s actually OSPF, which is the main focus of the CCNA exam as far as routing protocols are concerned. But you are still expected to know the fundamentals of rip and EIGRP, so we’re going to cover them here. You’re not going to need […]