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The next component we need to create are the image definitions.

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Now, the image definition ties the image that we've uploaded to the hard drive

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on CML to the node definitions that we just created in the previous video.

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Now, the main reason we have this particular component is this allows us to

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have different versions of code that can be available on the different node

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definitions.
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definitions.

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So, as we create these, we're probably going to want to put something in the

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naming convention that includes the version, because again, we're not going to

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do it in this example.

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However, there could be times you might want different versions of code

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available to the same node definition.

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I'll show you how to select those a little bit later, but the point is, this is

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what allows that to take place.

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You can have multiple image definitions mapped to a single node definition.
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You can have multiple image definitions mapped to a single node definition.

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However, each image definition has to be a one-to-one relationship to the image

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on the hard drive.

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So, that's where the one-to-one relationship comes in, the one-to-many

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relationship comes in to the node being able to be tied to many image

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definitions.

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So, let's go ahead and jump in and get started. These are fairly easy to create

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. Let's take a look at how it's done.
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. Let's take a look at how it's done.

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So, for the image definitions, we again go to tools, node and image definitions

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.

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This time, of course, we're going to go to image definitions, but instead of

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hitting manage this time, we're going to hit add.

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The first thing we need is an ID.

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I've already created one. We're going to call this Viptela VManage 20.10.1.

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As I mentioned during the introduction, it's generally a good idea to keep the
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As I mentioned during the introduction, it's generally a good idea to keep the

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version in here, because again, we can tie multiple image definitions to a

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single node definition, and then select which version of the code we want to

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run when we deploy the node.

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We'll see that in the next video. But for now, let's move on.

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There's, of course, not really any requirement what to use for the label or the

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description.

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I generally just make them the same, and it's the same as the ID just without
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I generally just make them the same, and it's the same as the ID just without

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the underscores.

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But, of course, this is entirely up to your naming convention.

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Then, under the disk image, this, of course, is the important part.

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This is going to show us those four images that we've already uploaded.

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So, now all we need to do is choose the proper one.

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This is for VManage, so we'll choose the VManage image.

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Now, you see here with the Add Disk image, if we hit this, what it's going to

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want is another image of one of the things we've uploaded.
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want is another image of one of the things we've uploaded.

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This is if your device required, say, two images for whatever reason.

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Our controllers don't need this, so we won't do that. We'll just remove that

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last disk image.

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But that's what that option is for.

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We could also, from here, either refresh the available disk images if we've

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uploaded something in the background, like through SCP, or we could also manage

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the image uploads right from here, but we've already uploaded what we need to
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the image uploads right from here, but we've already uploaded what we need to

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upload.

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So, now what we need to do is click on no definitions, and this is why we had

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to create the no definitions first.

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That way, they show up on this list, and we can actually choose that this is

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for Viptel of EManage.

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The reason we need this is because if we don't select anything and say create

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image definition, we get an error telling us, no, you have to choose a no

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definition.

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Now, of course, theoretically, you could just choose anything here and then fix
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Now, of course, theoretically, you could just choose anything here and then fix

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it later.

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But this is why we created our no definitions first, so we could specify it

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here.

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Once we choose that, it allows us to override some of the settings if we wanted

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to from the Linux native simulation.

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We set those the way we wanted them to begin with, so we will simply hit create

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image definition.

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So just like with our no definitions, we could scroll down here, change things

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if we wanted to and hit update, or we can go back to tools, note an image
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if we wanted to and hit update, or we can go back to tools, note an image

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definitions, image definitions, and we see here at the bottom, that our image

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has now been created.

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So our image has now been added to this list.

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So now let's add the images for Vbond and VSmart.

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So again, we hit add, we'll put in our ID, our label, our description, we

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choose our Vbond image here, and for the node, we choose Vbond.

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Create image definition, then if we want, we can just choose to go back twice.
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Create image definition, then if we want, we can just choose to go back twice.

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So we're still on image definitions, hit add again, fill in the appropriate

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information, choose the VSmart image, choose VSmart for our definition, and hit

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create.

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If we go back here to our image definitions, we now see that we have our VMan

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age, our Vbond, and our VSmart images created and mapped to our node definitions

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.
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So there's only a few more things to do now that we have this up and running.

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Our next step is we're going to have to deploy these into our topology and

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connect them to our network.

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Let's go ahead and get that done.