Numerically, the highest IP address is set as default OSPF Router ID (RID) by the system in a loopback interface. Now, in a physical interface, a number of things can go wrong. There might be a hardware error, or the cable connecting the routers might come loose or there might be a power cable problem. But as far as a loopback interface is concerned, the only way it can become unavailable is by deleting it manually and this cannot happen accidentally.
This video aims to educate you on why it is essential to configure the routers in a loopback interface.
A loopback interface is not proprietary, thus in real life situations and advanced studies, you will come across loopback interface problems. This is not a question or concern of if but actually when. This is just an aspect of this industry.
It is also important to understand why a loopback interface is essential in and to a network. These are just some of the problems you will encounter in a loopback interface.
How do you fix them? Well this is what the video is all about. At times, there might be a problem with the Ethernet or some hard coding needs to be done. Throughout this video, you will come across various loopback interface problems in an OSPF network and a variety of ways to solve them. Feel free to watch the video more than once to absorb all the information or pause the video to take notes and to concentrate on what was said. This is an important topic that you need to be familiar with not only for your CCNA exam, but on the job as well.
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