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The Azure extended network is a bit more complex and more

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of an Edge technology, pun intended.

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Absolutely,

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I intend that pun. This is something else that you configure through Windows

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Admin Center. And the use case here is where in your on‑premises network you

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have a subnet that needs to be eventually migrated into Azure and you're

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going to do that via subnet extension.

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You see the bottom part of this diagram? So the idea is

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you're migrating VM 1 into Azure, that's your goal.

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But the restriction is when it's in Azure,

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the VM's in Azure, it has to have the same IP address.

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It's admittedly kind of an Edge scenario because Microsoft's

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recommendation would normally be recreate your IP ranges in

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Azure and what does it really matter what the VMs private IP is.

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But you may have dependencies,

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compliance requirements, or applications that have a hard

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requirement on that private IP. So in that case, we're

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performing what's called a subnet extension.

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So you're going to create an Azure Virtual Network that contains a

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workload subnet with that same subnet ID. You'll also need a

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persistent Layer 3 connection between your on‑premises network and

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the Azure Virtual Network. That would mean either a site‑to‑site VPN

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or an ExpressRoute circuit.

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Lastly, you'll need to deploy a couple extra virtual machines. You'll have a

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network virtual appliance running on‑prem in its own subnet, as well as an Azure

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network virtual appliance. There's some additional restrictions there that Azure

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NVA has to be running the Azure Edition of Windows Server 2022. There's a bucket

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load of constraints here that we don't need to worry about for the exam

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objectives. But once again, to saying that refrain,

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if you do want the step by step,

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I'll point you in the Exercise files to the Microsoft docs.

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In the demo, I'll just show you where to load up this extension in Windows Admin Center.