WEBVTT

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 Hello and welcome to this course on an
 introduction to network programmability

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 and automation. My name is Keith Bogart
 and I will be your instructor

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 for this course.

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 As you can see here, here's
 my contact information.

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 So if at any point in time while watching
 these videos or after the videos

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 are done, you have any questions or
 concerns or doubts, please feel free

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 to reach out to me here via any of
 these methods and I'll be happy to

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 do my best to answer
 your questions.

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 So let's talk a little bit about what
 the course prerequisites are.

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 So let's take a step back here for
 a moment and I'll sort of describe

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 who this course was designed for.

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 So this course was designed for the network
 engineer, whether you've been

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 working in networking for two months
 or for 20 years, but the network

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 engineer who is very familiar with the
 command line, logging into individual

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 devices, whether they be routers, switches,
 firewalls and doing whatever

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 you need to do on those devices.

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 And maybe for a while now, you've been
 hearing buzzwords like software

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-defined networking or network programmability
 or automation or Ansible

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 Python and you've thought to yourself,
 well, you know, that sounds like

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 interesting stuff, but I've been doing
 just fine all these years with

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 my command line.

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 Sure, it might be a
 little cumbersome.

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 I might have to do a lot of stuff repetitively
 over and over again, but

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 this is what I'm used to.

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 And this is what I know.

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 And maybe up until now, you've pretty
 much gotten away with just sort

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 of ignoring all that stuff, sort of
 like people got away with ignoring

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 IPv6 for decades until it hit
 them square in the face.

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 Same thing is true with this.

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 So network programmability and automation
 is no longer just a buzzword.

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 It's now moving out of its infancy
 and starting to gain some maturity,

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 which means that if you're not doing
 network automation programmability

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 in your network now, you probably
 will be in the near future.

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 So you need to be introduced to some
 of these concepts, and that's what

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 the purpose of this course is.

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 This is not going to show you how to automate
 or how to program your network.

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 That's not the intent.

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 My intent is to give you exposure into
 what some of these concepts are,

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 why you might want to dig into them
 further, what types of things they

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 could do for you, the benefits
 they could offer you.

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 So that by the time this course is done,
 you will be familiar with a lot

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 of the terms and acronyms that right
 now might just be going right over

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 your head and you have no idea what they
 are when people talk about them.

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 So based on that, let's take a look at
 what the course prerequisites are.

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 As I say here, I expect you to know
 a basic understanding of the roles

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 of network infrastructure
 equipment.

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 Simply said, that means that throughout
 these videos, I'm going to be

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 saying, yes, a router here or a switch
 here or this topology is made up

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 of a firewall and this.

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 Well, if you don't know what a router
 is or a switch is, that will be

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 completely meaningless to you.

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 So I expect that you know what basic
 networking devices are, even if you

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 never actually touch them and you
 know what their purposes are.

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 Number two, I expect you have some
 kind of experience with configuring

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 network equipment via
 a command line.

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 Now, once again, you might not be a
 jockey with a command line and know

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 every single thing.

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 But in order to really understand the
 benefits of network automation and

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 programmability, you need to have some
 exposure with the command line.

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 It's not until you start feeling the
 pain of having to do the command

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 line over and over and over again on
 multiple devices doing the same thing

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 over and over again that you will truly
 appreciate what programmability

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 and automation brings
 to the table.

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 Third, a high level understanding
 of the usage of scripts.

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 Now, hold on, you might be thinking,
 whoa, wait a second.

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 I don't know anything
 about scripting.

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 That's okay. What I mean by this is,
 if I asked you, what is a script?

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 Why would you use a
 script in anything?

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 I'm not asking you to write a script or
 to know all the different scripting

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 languages out there, but hopefully you'll
 be able to tell me, oh, well,

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 to automate something, to
 make something easier.

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 So I don't have to do it manually
 over and over and over again.

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 If you answered that,
 you're good to go.

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 And then lastly, understanding of
 basic IP packet routing concepts.

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 Once again, I'm not expecting to
 be an OSPF or an EIGRP guru.

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 But as we go throughout this course, in
 order to do network programmability

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 and automation, you're going to implement
 things into your network, like

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 controllers, like servers, running
 things like Ansible or Chef.

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 And these things are going to need to
 be able to have basic IP reachability

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 to your devices, whether your devices
 be servers or virtual servers, router

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 switches, even end hosts.

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 IP is what carries all this
 stuff back and forth.

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 So if you have no idea what IP is,
 if I say the term IP packet, you're

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 like, huh, well, then that's
 going to be a network.

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 So what are our course objectives?


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 Let's talk a little
 bit about that.

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 So as I mentioned, I'm to give you exposure
 to various elements of network

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 automation and programmability.

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 Now you can read all
 this stuff yourself.

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 The basic idea is I'm going to expose
 you to a lot of these elements like

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 tools like Chef, Ansible
 and Puppet.

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 What is an API? And we'll talk a
 little bit more about REST APIs.

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 I'm going to talk about what is an SDN
 controller and how are they different

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 in some circumstances?

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 How can you implement them in one way
 in a network and maybe implement

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 them in a slightly different way for a
 different purpose in another network?

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 We're going to talk about something called
 the imperative and declarative

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 models, which directly correlates to
 how an SDN controller operates within

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 a network. We're going to talk about
 concepts of underlay and overlay

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 networks. And these things
 called fabrics.

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 What are those things?

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 What are they? Why
 are they important?

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 I'm going to introduce you
 to Cisco DNA Center.

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 You may have never heard of that product
 before, but I'm going to show

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 you sort of what it
 is, what it can do.

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 Once again, not with an emphasis on,
 hey, let's get you to the point where

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 you can configure DNA center
 and make it do its stuff.

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 That's not my objective.

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 My objective is that you walk away
 from this course now being familiar

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 with what the product is, what problems
 it was designed to solve, and

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 maybe have a little bit of exposure to
 the GUI so you can sort of visualize

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 in your head this product when
 somebody mentions it to you.

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 And we'll also talk about the interpreting
 of JSON encoded data, which

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 is a very popular and common format
 of formatting your data when sending

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 it to and from networking devices.


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 So I hope that you get a lot
 out of watching this course.

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 Let's go ahead and
 dig right into it.