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…

Network Utilities Welcome back. In this lecture we’ll talk about network utilities. We’ll talk about some of those tools and commands that can help us with troubleshooting. Let’s begin. We’ll talk about six commands in specific. Those commands are telnet, SSH, ping, traceroute, FTP, and file copy. Let’s start with the first one called Telnet. To take a look at the these commands will go straight to the terminal. All right, as you can see, I’m at the terminal. Let’s try the commands one by one. All of these commands…

System and Chassis Information Welcome back. In this lecture, we’ll understand how can we use Show commands to view important system and chassis information. Let’s begin. First, let’s talk about system information. We can use the operational mode Show System command to get system information. I have some important Show System commands listed on the screen right now, such as Show system alarms, shows boot messages, show System commit, showstem connections, show system login lockout, memory storage, uptime users, and so on. The best way to understand this is by…

Summary of Section 4 Hello and welcome back. In this lecture we are going to summarize what we learned in section four. So in section four, we started by talking about initial configuration where we talked about how to set a root authentication password. We also spoke about system services for remote access such as SSH and telnet. We understood how we can set the host name, system time and time zone. We also understood how we can set a login message and how we can configure the command line…

Network Time Protocol Welcome back. In this lecture, we’ll talk about network time protocol. Let’s begin. The first question is what is network time protocol? Network Time Protocol, also known as NTP, is a very widely used protocol which is used to synchronize the clocks of routers and other hardware devices on the Internet. Net debugging and troubleshooting becomes easier when timestamps in the log files of all devices are synchronized. Because events that span the network can be correlated with synchronous entries in multiple logs. Devices running Juno’s can…

Tracing Welcome back. In this lecture we are going to talk about tracing. Let’s begin. All right, so first of all, what do we mean by tracing? Tracing is the juno’s term for what other vendors sometimes call as debugging. When you enable tracing, a trace file is created that is used to store decoded protocols information received or sent by the routing engine. In other words, when you enable tracing, a file is created which contains all the messages captured using the trace function. Juno sends the tracing results…

System Logging Hello and welcome back. In this lecture, we’re going to talk about system logging. Let’s begin. First of all, what do we mean by Syslog or system logging? System logging operations record systemwide highlevel operations such as interfaces going up or down or users logging into or out of the device. By default, logging logs are placed in files that are stored in the VAR log directory. The primary Syslog file which is included in all factory default configurations is the VAR log messages file. Every system log…

Introduction Welcome to the new chapter that is Taste, Tool and Automation. For this particular chapter.  Our discussion points would be tool Selection, tool Lifecycle and Tool Metrics. So let’s try to get into detail one by one. Tool Selection So, how the test tools should be selected and what are the criteria to be kept in mind while selecting the test tools. What are the options available? What is the pros and cons of different types of types of test tools? Let’s discuss all the details in this sub…