Complete OSPF for Juniper JNCIS JNCIP

This video discusses how and when Designated Router (DR) and Backup Designated Router (BDR) are elected, what is their role in OSPF networks and which networks they are required.

Junos stores area number in dotted decimal notation. This video goes through how a number can be converted into dotted decimal.

This lecture discusses Backbone, Normal, Stub and Totally Stubby Areas. We will configure these area types and analyse OSPF databases. We will also discuss advantages and limitations of each area type.

This lecture discusses area types Not so stubby area (NSSA), Not so stubby totally stubby area (NSSA with no summary). We will configure both these area types in our topology and analyse OSPF databases. We will also do connectivity testing at the end.

In this lecture we will learn how to extend OSPF backbone to connect to an area that is not directly connected to the backbone. Once connected the backbone, we will examine the OSPF database of remote area and test connectivity within the whole network.

This lecture covers simple text and md5 authentication for OSPF. We will carry on working on our topology and configure both types of authentication, and verify our configurations using show commands.

In this lecture, I will discuss types of OSPF routes, how they are learned, how and where they can be filtered. We will also learn how to filter inter-area routes.

In this lecture, we will learn how we can filter external routes in OSPF.

In this lecture, we will discuss concepts of route redistribution, default metric, metric types of redistributed routes. In our topology, we will remove a loopback from OSPF and redistribute it into OSPF and test connectivity. We will also add a static route to our ISP router, redistribute it and test connectivity to it. We will also practice changing metric type and examine it's effect.

In this lecture, We will configure redistribution from BGP to OSPF for 2 different ISP connections, making 1 primary and other backup. We will also redistribute a summary route to BGP to make sure the return path is available. At the end, we will test connectivity.

In this lecture, we will learn how to summarize inter area routes and how we can use summarization to reduce database size and effect routing decisions.

In this lecture, we will discuss how you can summarize external routes in OSPF on Junos. On Juniper devices, it is a bit different than how you do it on IOS devices as there is no direct command and we have to apply a workaround.

In this lecture, we will learn how to setup trace-options to troubleshoot adjacency forming issues. We will examine logs and fix mis-configurations.