Pass Cisco ENAUTO 300-435 Exam in First Attempt Easily

Network Programmability Foundation

1. ENAUTO Introduction

Hi everyone. Welcome to Cisco enterprise automation course. Now, what happened, if you see the last five years, the time has been changed. People are now more interested in the application perspective than the network perspective. Meaning, if you see, for example, 15 years ago, people were thinking, "Okay, we have the network, and then applications are running on top of the network." But now the company's corporate organizations are thinking about application and support and networking. So we are in the application-centric world, and in that world, we have to learn how we can integrate with programs. That's why we have this course. We are going to learn understand the programming capability of the networking devices, right? So how can we go and do the programming for different types of new, innovative Cisco STM solutions? and here you can see the list. So we have the list here for how we can do the programming for Cisco DNA. And that is big at this point in time in the market. Everyone is talking about their old DNA product, but we have the programming capability with Cisco Miraka. So first few topics that you are seeing here on top, you'll find that these topics will build the foundation. So once we have a solid foundation, on top of that we can go and build the knowledge level. So, now that we know that, what is API, and what are the integrations within programming? Obviously, different types of programming languages are available. But as a network engineer, what we should learn and how much we should learn, there should be some line because we are not software or the application developer, rather than we are network engineers or network programmers, who is going to create automated scripts to reduce the errors, to increase the performance, et cetera. Correct? and obviously the field will be different. That okay. People will think the network engineers are doing these things with programming. But behind the scenes, there are some other stories as well. Now, when we are talking about networking programming, so at that time, what is happening that not only that we are doing the programming of the network, that's one thing. But behind the scenes, what is happening is that the programming that we are doing, or, say, the API that we are using, is machine-to-machine interaction. So there is a difference, a technical difference, when we do the CLI-to-machine interaction rather than the API-to-API interaction. Machine-to-machine interaction will always be faster than human-to-machine interaction. And that's the key here. Obviously, in the upcoming videos and recordings, you're going to learn more and more about all these capabilities, right? So let's start this course and make it happen that we should go and learn the new capabilities, models, etc. related to programming in this particular course.

2. Find the Topics

So from where I can go and get the topic link here, you can see that you can go to this link for the Learning Network Cisco.com Enterprise Auto Exam topic and check the topics in detail that I'm going to cover in this particular course. So let me go there. So, I'm here in this link; let me scroll down. So here you can see that we have a network-programmability foundation, and you can also see that 10% of the weight is just to know the stuff. So the API, Python, and obviously the iOS 60 how the AnsiblePuppet, they are helping to build the programmes related to iOS 60 and others at 10%. But if you go and learn Python or Ansible Puppet, it will take time. What I am going to do here is whatever is required of us related to this particular course, which I'll go over in detail. So for example, with Python, I'm going to cover most of the things that network engineers should know, and again, I'll go beyond what a network engineer should know, and we can discuss the constructs of the Python language as well. So, in the future, if you want to learn more and more about Python's programmability, you can do so. Let's focus more on the networking aspect of Python. So, what are the fundamentals, such as what Python is, how to install it to do the lab, what are the libraries, the structure, the functions, and so on? And, of course, how we will use it within our programmability, such as diskand programming and other programming. The next 10% of the marks are just for knowing the data models. So what is the data model, and what is the importing messaging protocol? The transport will notice that the entire protocol stack is present for data modeling. We are going to discuss it one by one about that.The third section is very important. So once we have the foundation related to programming APIs, then we can go a little bit deep inside the programming and actually create the programmes and do automation and scripting as per the topic. So scripting related to iOS XE, not only iOSX, but you can check, for example netmicoandyou can check the supported list of devices. So many non-Cisco devices are also supported. If you want, you can try it on non-Sisco devices as well. But I will stick with the curriculum and course we have, and I'll follow the topics on the agenda that Cisco has given. Then DNS center. What is the API related to? DNA center. One nice API that Cisco has introduced is the intent-based API. So we can go and discuss that. You can see the intent APIs; you have the runner API; you have the site API, et cetera. So different terms are there. Assume that you should have the basics of the science of DNA. You should have some basic fundamental knowledge of SDWAN as well. Now, a good thing about this is that if you don't have the basic fundamentals and you want to learn the automation and programming related to Cisco Enterprise automation, you can do it because anyway, I'm going to start at the beginning, but it will be good and visible that you go and check the CCNP Enterprise core. You already uploaded that, so you can refer to it as well. even for the first one. Also, I have so many ABC of SD One series courses. You can refer to that because here I will not explain to you what the data plane is, what the control plane is, or how it is working. Rather than go and do the programming, we'll go and use the automation related to Python and APIs. And finally, Mirake. For Mirake, I have the baseline course Miracle basics and the troubleshooting that you can refer to. So what you can do is that pearly, even if you can get by with two or three courses. So you are studying Meraki, and then you are doing the API that is related to that palace. You can study with Steven, and you can come and go again. It depends on the interest. Once your interest will get created, passion will get created related to programming and automation. Then what you will do? As I am doing at the moment, I try to do everything via program. Sometimes it will take much more time than what we are doing or did with the CLI, but after a certain point, it will depend on your passion and previous knowledge, your background. Say, for example, that my background is as a computing engineer from computer science. So that is my background. And I have done lots of programming in my engineering curriculum. So I have my passion for CC, plus Java, et cetera. I have done these codings long back. So that knowledge is recalled here. Because I know that for loop, while loop, et cetera, even logically, anyone can understand the data structure and the conditions. It's not a big thing. But still, if someone hasn't done any programming and you want to do the programming, it's a big deal for him. It's a big mental block that we have to remove in order to work. All right, this is the topic. Let's stop here. Next section. We'll start these topics one by one, and we'll go slowly and try to build the fundamental foundation related to automation and programming.

3. Section 1.0 Network Programmability Foundation

All right, so let's start the 10 Network Programmability Foundation. What are the topics we have to learn here? First of all, we should go and understand that it is Hugo, because for network engineers who want to learn programming skills, most of the code they will get from this place can be found there to visit. I’ll show you how you can do it. First of all, for our practice, what we Cando that we can go and install GNS Three. Inside GNS Three you have the automation tool already they have put that automation tool will do most of the things. So inside that how we can go and put Python. Because the tool is itself a language or programming language, you can use whatever you want. I log in and show what version of Ubuntu it is. So Ubuntu is already building GNS, and we can learn practice for our purposes; that is good and enough. Then in future, if you want to import, if you want to use that knowledge and utilizethat knowledge in your production environment, where you may get Red Hat, because that is the industry standard. Most of the companies have the Red Hat servers or any flavor of Linux server commands will be almost very much same. So that one, one dot that we should understand, is it. Then we should at the very least understand the fundamentals of API: what is API and what are the commonalities between different types of API? Because you may have heard that risk restful API,incentive based API and there are so many. Correct? Yeah. So we should understand first of all the basic principle fundamental behind the rest API, how it looks like, what it is, whatever it is. Once you know the basic fundamentals, then we can utilize that anywhere for any type of API. Correct? So we'll learn and understand API styles and how to understand them, then we'll have challenges for API synchronous and asynchronous, and we'll see those theoretical things and how to integrate the API within Python. So before that, you should learn Python. That's why I have a series of videos related to Python. Again, those are important to the network engineers. not for the engineers or the application programmers who are doing some machine learning or very high levels of coding that will help us write these scripts. For networking automation in Python virtual environment, whatare the benefits, how you can create it? Each and everything is actuallyall these points are connected. So, if you do one API-related lab using Python and copy some code from the zip, everything from 1.1 to 1.6 is linked. Now, we have a special section here related to iOS XE. And learning the automation of IOSC is huge at this point in time. Because, if you look at most Cisco devices, especially next-generation devices, they are running iOS XE code. So it's either a catalyst switch or a new generation WLC 9800, or it's ISR devices running the SD-1 code; even CSR devices run the IOS-6. You'll find that most of the places you have the iOS XE If you understand the iOS XE code at one place, you can utilise the same code at different places. So understanding iOS XE is critical for automation success because it is the new standard. All right, so let's just stop here and learn about it in an upcoming section.

4. Introduction to git

In one, we must learn and comprehend git. Now, with git and GitHub, we are going to learn and copy the code more and more. We're going to search the different type ofcodes, whatever public published by different programmer codersor network engineers and then we can utilizethose codes inside our lab environment or youcan again utilise inside the production environment. Now, let's see how it works, and you can see the graphic, we have the cartoon, that shows how it works. Now actually no idea, we have no ideaabout that how it is working even weare not worried about how it is working. The only thing we are going to do is follow some steps, and once you follow the steps, you'll see that we have some steps to follow to create the code, to upload the code, to merge the libraries, and all right, so we'll go and follow that again, and if you get errors, save your work elsewhere, delete the procedure, and download the fresh copy. That's the way that the network engineers are working when they have programming-related programming related. So what are the things we can do? And here we have the list. So I made a change to the code, realized it was a mistake, and wanted to revert back. These are actually the problem with the application engineers or the programmers that you have done something, you have some wrong syntax code or some logic, you want to change it last quote or had aback up with that old code. So you have the backup, you have multiple versions of the code, you have the difference in the code, or maybe someone's working with some of the programmer and the new code. Having a new program, you want to merge it, you want to take the difference, you have multiple copies, and you have the backup. All these points are listed here, and the answer is that your ZIP will do that. So it's a public repository, not only for the public, but here you can see that you may have two types of forms, developer private and developer public. So you have one code that you publish for public use, and you want different users or different programmers to copy that code and use it to just check the authenticity, just take the scalability and nature of the program, and they can improve it, correct? So it's just shared code, and you can see that private is also included, so one copy is with you and you can share a portion or other code. Correct. So again, the final conclusion for all these steps that we are going to study is this slide. You can go and have a reference to this particular slide, and you can check the link as well to see where you can get all this information. All right, so let's focus more on this under the hood and how it is working You may have multiple copies. You may have multiple versions. You can go and upgrade or downgrade. You'll see that more and more in the upcoming session. How can we do the configuration? Obviously, in our lab I have one GNS I have my network automation tool, and I'll show you how we can do it. We can go and do the zip confit global username and email address, and then my zip is prepared, and I can go and initialize the project initially. It will be hidden under the Zit directory, and here you can see the flow you have working. Directly, you can do the staging, and then you have the repository. We can go and follow these commands zip add dot That means you can add the zip then commit it, so commit minus an initial commit to the commit again there are chances that for a specific programmer multiple programmers are working at multiple locations, which you can think of as a branch as well so you have multiple branches all of which are independent and in the future you want to merge them so first and foremost there is the concept of a branch correct zip branch name for example branch is The master is very straightforward. Now, if you want to merge different types of branches in the future, you can go and merge it so you have your independent first, then you can go and create the repository, so you can add your username and password, upload your project, commit, and then multiple projects working as different locations or branches that you can go and merge again. if you want to share your changes so you can gonad do the push origin master and even the branches as well these are the operations we are going to do obviously we will understand more and more now this particular slide is important because this also we are going to use it or utilize it so in future some public code is there running up and running in the zip we can go and wean copy to the local directory even you can go and create publish someone can copy or you can also copy the others code then once it is in your automation tool in your GNS then you can do certain edits. You can make changes to your programmer and run it in your lab environment, or once it is up and running and validated in the lab environment, you can run it in the production environment as well. Okay, so these are the basic theories related to obviously more we work. We are going to learn more, so let's login to the zip file and do all these steps, following all the steps that we have seen in this session.

5. Lab using GNS3

Before we start the lab, I just wanted to show you my setup here. Now we can go and install the GNS. You can go to this link to download the GNS. Everything is free. You can create your owner's free account and use it. Now GNS is running over the server—over the VM. So you need a hypervisor. Most of the hypervisors are free if you're doing the home lab. So, for example, I'm using a VMware Worker Station Pro. On that, I'm installing GNS Three VM.Although what I have done that have created complete video. That is how you can install GNS 3 on your system. So you can refer to that video. But anyways, most of the engineers know how we can utilize GNS 3. Now, GNS Three is also becoming very popular, and it's very enhanced at this point in time. So, if you go ahead and look at GNS version 2011, let me show you what version I have. But this is two to 1011, which is also present at this point of recording. And in future you'll see that more and more innovations inside GNS. Anyways, once you go and install the GNS 3 on your laptop, you can see I have made some adjustments, although you will get to the right-hand side of the pin where you can check all these details. So we are very interested in looking for information related to our devices—our networking devices. Now, when you go and do this thing—that is, when you go and add the devices— So for example, I have added SDWAN devices, I have added network automation, I have added CSR, AC, et cetera, and it hasn't been required. We can go on and add more and more devices. So for that, what you need to do is create a click template. So here you can see the plus sign, click Next, and then you can go and search for automation. Once your automation comes, just click Install, and it will ask you, "Next," and it will be finished because I'm already having this. So it is showing an error. But I can have multiples as well. So I can go and create and send. So now you can see that I have Automation One and Two that I can use. It simply click Drag and drop. Once you click Drag and drop you can see hereyou have your automation engine behind the scenes went tomachine and then I want to build my small networkso I can go and use GNS switch. It is recommended that you use this GNSswitch because of its very lightweight weight. Then I can go and use this net because I want to give the IP address to my automation tool. That's very much done. Now suppose if you want to interact with your laptop, then you can go and use this cloud, and then you're done. Now, once we have this very basic lab setup running, we can use these connectors to connect. So let me go and use this connection, say, here. And then again, we can go and use the connection like this and like this. Now, in future labs, you'll see that we can go and change the design, layout, and those things as well. Design, layout, admins simply you canchange the symbol as well. And in future you'll see that I havechanged as well in the upcoming videos. At the moment, it's okay. Now, once you have the network automation tool and you want to provide the IP via DHCP, you can go and click Edit Config, and you want this automated IP so you can remove those extra symbols. And now if you go and start it, it will become green. Double click, and you have your automation engine. Now, the font size is very small at this point in time. So you can go and click Settings. You have the general tab once you're inside this setting, where you have the party launch go to the appearance, and make this font size that you can work with. Say, for example, that I made this at 16 or maybe 18. Once it is there, then you should go to the login page without logging in, but you can go to the sessions page and you can click "Default session" and save it, right? I can click save it, and then I can click close. Let me restart this session. But you can see that it has an IP address. And if you double-click here, you can see that the font size will get increased, correct? Now, this is the initial basic setup that is working behind the scenes. But what we can do is that I have certain codes that we should run once we have the first installation of the app get install.Once my automation engine will come, actually it is tryingto get connected with these links and trying to getin some of the patches or some of the updates. because this is GNS two to ten. In the older version, you have to do it manually—even when it is connecting with the remote servers and updating the downloads and updating the patch. You should go and use these steps as well. So here you can see in the back that "apptupdate" is Python 3, Pip Netmico, and Napalm Simple JSON. And then below you can see that we have this application, which you can install, and then the virtual environment. So even if you can copy and paste or if you want to type it, you can update. It will take some time to do the update. Meanwhile, let me show you what is behind the scenes. This is actually a very important page that we have. So here you can see that in the bottom line, number 38 is a zip clone Http.So I'm cloning the configuration or cloning the programme from the zip. And then I'm going to this particular folder, and then I'm going to the virtual environment that I will cover in an upcoming session. And I can run my code, right? So that's actually very important to running the code. Now, here you can see that it hassome problem getting the connection with the Internet. So once you install and once you run your system, you ping the public IP. and here you can see that this is unreachable. It should reach sometimes it happens that someof the laptop you need to restart yourVMware in GNS three after the installation. So, after this session, I'll reboot my laptop and return in the next upcoming session where we have to follow the richest step, right? So I will reboot my laptop, I'll comeback, and I will copy and paste all these configurations. You can simply copy and paste this access. And you can put here. So you can go ahead and put it in, and it will run all the lines of configuration one by one. So my Python will be ready. Let mecoo and Apple know, and these things you will come to know in the upcoming Python session. Then it will be up and running. And at this point of time, I don't want to enable or create my virtual environment. First of all, we will learn about the theory, and then we'll do that. Obviously, in the upcoming session we have so many quotes to understand and learn. So slowly we'll learn all these skills. Alright, so let's stop here. Let me go and reboot my laptop. I'll come back with the same setting and we'll proceed further with zip-related steps.

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