Create an HCX network extension
Create an HCX network extension is an optional step to extend any networks from your on-premises environment to Azure VMware Solution.
Under Services, select Network Extension > Create a Network Extension.
Select each of the networks you want to extend to Azure VMware Solution, and then select Next.
Enter the on-premises gateway IP for each of the networks you're extending, and then select Submit.
It takes a few minutes for the network extension to finish. When it does, you see the status change to Extension complete.
Now that you configured the HCX Network Extension, learn more about: