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Virtual Network Peering In Azure

In this article, we will discuss virtual network peering in Azure.

Purpose

The virtual network peering enables 2 virtual machines on 2 different virtual networks to set up the connection using their private IP address.

Types Of Peering

Virtual network peering → This type of virtual network peering creates peering between the virtual network within the same Azure region.
Global virtual network peering → This type of virtual network peering creates peering between the virtual network across Azure regions.

Creating Resources

In this article, we will create required resources. First, create 2 virtual networks. Please note that their address spaces should not overlap.

Picture showing address spaces of two virtual networks

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Second, create 2 virtual machines. One virtual machine should be inside "vNet1" and the other virtual machine should be inside "nNet2".

Picture showing two virtual machines mapped to two different virtual networks

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Accessing One Virtual Machine From Other

Try to access the IIS server installed on "vm1" from "vm2" using the private IP. You will get a message - "This page can’t be displayed".

Picture showing the error message when one virtual machine is trying to access second virtual machine by using the private IP address without peering

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The reason is that both the virtual machines are in different virtual networks and no connection is established between them.

Virtual Network Peering Comes Into Picture

To establish a connection, we will work on the following steps

Go to the "Peerings" submenu in any of the virtual networks. For this example, I am working on "vNet1".
Click on the "+ Add" button.

Picture showing the add button for adding the new peering between the virtual machines

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A screen will appear to enter the information.

Picture showing the add peering screen in Azure

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Enter the required information and click on the "Add" button.
Once the button is clicked, 2 virtual network peering resources will be created (one for each virtual network).

Picture showing the notification while adding the peering in both the virtual networks

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You will be notified in the notification area once the peering is created.

Output

Now, browse virtual machine "vm1" from "vm2’. You can now access the IIS server of "vm1" using the private IP.

Picture showing the IIS home page when one virtual machine is trying to access second virtual machine by using the private IP address after peering is done

Click to Enlarge

Posted By -	Karan Gupta

Posted On -	Saturday, May 8, 2021

Updated On -	Sunday, September 26, 2021

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