Configuring Firewall Filters Welcome back. In this lecture we’ll talk about configuring firewall filters, all those concepts that we discussed in the previous lecture. We are going to apply all of those concepts on a Juno’s device. Let’s begin. Before we get onto a Juno’s device, some quick information on how to apply firewall filters. So, firewall filters can be applied to all interfaces. This will allow you to filter traffic that is entering or exiting the interfaces. They can also be applied to the loopback interface, which is lo…

Policy Chaining Welcome back. In this lecture we’re going to talk about policy chaining. If we have multiple policies consisting of multiple terms, how does the evaluation actually happen? How are the policies interconnected? That is what we’re going to talk about in this lecture. Let’s begin. On the screen right now, I have the illustration of a routing policy, in fact, multiple, multiple routing policies. On the top left hand side, we have a route. If we have an incoming or an outgoing route, how does the route actually…

Prefix List vs. Prefix List Filter Welcome back. In this lecture, we’re going to talk about the difference between prefix list and prefix list filter. Originally, I had planned to talk about route filters in this lecture. However, after the previous lecture on prefix list and prefix list filter, I got a feeling that I might have left you too confused. Which is why I decided let’s do one more lecture on the differences between prefix list and prefix list filter. Hopefully, this one should clear the confusion, if any….

Building Blocks of Routing Policy Welcome back. In this lecture we’ll talk about the building blocks of routing policies. What does a routing policy look like and what is it made up of? That is what we’re going to discuss in this lecture. Let’s begin. All right, so let’s start by talking about the components of a routing policy. All policies are composed of the following components that we configure. Number one, we have match conditions. Number two, we have actions. A combination of actions and match conditions creates what…

Routing Policy Overview Welcome back to this section on routing policies and Firewall filters. In this lecture, we’ll take a look at routing policy overview. Let’s begin. Alright, so what do we mean by routing policies? Routing policies allow you to control the flow of routing information to and from the routing table. This is information that flows between the routing protocols and the routing tables, and also between routing tables and forwarding tables. So essentially, routing policies allow you to control information between the routing protocols and the routing…

OSPF Welcome back. In this lecture, we’ll talk about open shortest path first routing, also known as OSPF routing. Let’s begin. OSPF is an interior gateway protocol designed to be used within an autonomous system. We spoke about autonomous systems in the earlier lecture. An autonomous system is a collection of routers within a common administrative domain. So OSPF is an interior gateway protocol designed to be used within an autonomous system. OSPF uses the concept of link state advertisements, also known as LSAs. Link state advertisements are used to…

Static Routing Welcome back. In this lecture, we’ll talk about static routing. In the last lecture, we looked at a concept called route preference, and now we’ll move on to discussing static and dynamic routing. And we’ll start off by talking about static routing in this lecture. Let’s begin. What do we mean by static routes? Routes that are permanent fixed in the routing and forwarding tables are often configured as static routes. These routes generally do not change and often include only one or very few paths to the…

Routing and Forwarding Table Welcome back. In this lecture, we are going to talk about routing and forwarding tables. In the last lecture, we looked at the concepts of routing and forwarding tables. In this lecture, we’ll get onto a Juno’s device and understand how does a routing table look like. And how does a forwarding table look like. Let’s begin. Let’s first start. Start by talking about routing table. The command to view the routing table on the device is Show Route. That shows you the entire routing table….

Introduction to Routing Hello and welcome back. In this section we are going to focus on routing fundamentals and in this lecture we are going to look at an introduction to routing. We’ll understand the basic concepts of routing. Let’s begin. Let’s look at a network topology. We have a router which has an IP address of 192-1681 dot one. It is connected to a switch and the switch is connected to two laptops 192-1681 dot ten and one nine to one six eight dot one dot eleven. If the…

Root Password Recovery Welcome back. In this lecture, we’ll understand how to perform root password recovery on a Juno’s device. Let’s begin. All right, so these are the steps to perform root password recovery. If you have lost your root password, this is how we can do it. Number one, connect with the console port and reboot the device. Number two, as the system boots, press the spacebar when prompted. Number three, at the loader prompt, enter the command booty S to enter into single user mode. Number four, enter…