Creating Azure Virtual Networks, Advantages and Disadvantages

Introduction

This article delves into the essence of Azure Virtual Networks, unraveling their significance, advantages, and potential considerations. As we embark on a step-by-step journey in creating a Virtual Network, we explore how this fundamental Azure component lays the groundwork for resilient, scalable, and seamlessly connected cloud environments.

"In my previous article, I offered a comprehensive guide on creating Azure Resource Groups, delving into their advantages, and addressing potential challenges. For a detailed foundation, please refer to my earlier work titled 'Creating Azure Resource Groups, Advantages and Disadvantages' Now, let's seamlessly continue from where we left off.

What is the Virtual Network in Azure? 

A Virtual Network (VNet) in Azure is a foundational component of Azure networking that allows you to securely connect and isolate Azure resources. It provides a private, isolated network in the cloud where you can deploy and run virtual machines (VMs) and other Azure services. Virtual Networks are a fundamental building block for creating and managing cloud-based applications and services.

Advantages of Using Virtual Networks in Azure

Isolation and Segmentation

• Explanation: Virtual networks allow you to isolate different parts of your infrastructure, creating segments (subnets) for different purposes.
• Example: You can have separate subnets for web servers, databases, and application servers.

Scalability and Flexibility

• Explanation: Azure virtual networks are designed to scale as your business grows.
• Example: You can easily add new subnets or expand IP address ranges without affecting existing resources.

Security Controls

• Explanation: Network Security Groups (NSGs) provide granular control over inbound and outbound traffic.
• Example: You can restrict external access to specific ports or allow traffic only from specific IP addresses.

Hybrid Cloud Connectivity

• Explanation: Virtual networks in Azure can be connected to on-premises networks, creating a hybrid cloud environment.
• Example: You can establish a VPN connection between your on-premises data center and Azure virtual network for seamless data transfer.

Load Balancing and High Availability

• Explanation: Azure offers load-balancing solutions that enhance application availability and distribute traffic evenly.
• Example: You can configure a load balancer to distribute incoming traffic across multiple servers, ensuring optimal performance.

Disadvantages of Using Virtual Networks in Azure

Learning Curve

• Explanation: Configuring virtual networks involves understanding various concepts like subnets, NSGs, and routing tables.
• Mitigation: Invest time in learning Azure networking concepts through documentation and tutorials.

Complexity with Growth

• Explanation: As your infrastructure expands, managing a complex network architecture can become challenging.
• Mitigation: Implement proper planning, and documentation, and use naming conventions to maintain organization.

Cost Management

• Explanation: While Azure offers a pay-as-you-go pricing model, costs can accumulate based on resource usage.
• Mitigation: Regularly monitor resource usage, leverage Azure cost management tools, and optimize resource allocation.

Dependency on Internet Connection

• Explanation: Azure services rely on an internet connection. Connectivity issues may impact resource accessibility.
• Mitigation: Implement redundant internet connections and consider Azure ExpressRoute for dedicated and private connections.

Creating a Virtual Network Step-by-Step

Step 1. Sign in to the Azure Portal

Before you start creating a virtual network, ensure you have an active Azure subscription. Once you have your subscription, sign in to the Azure portal.

Step 2. Navigate to Virtual Networks

In the Azure portal, locate and select the "Virtual networks" option in the left-hand navigation pane. This will take you to the Virtual networks dashboard. Or

In my previous article, I created a CSharp_Corner_RG Resource Group. Click on the  CSharp_Corner_RG Resource Group.

Picture 1. CSharp_Corner_RG Click on the Create button.

Step 3. Go to the Marketplace

Go to the Marketplace and search for the virtual network.

Picture 2. Search virtual network and Click on the virtual network.

Step 4. Create the virtual network

Picture 3. Click on the Create Button in the virtual network

Step 5. Fill in the Basic Details

Virtual Network Name: Provide a meaningful name for your virtual network. This name should reflect the purpose or nature of the network.

Example: CSharp_Corner_VNET

Region: Choose the Azure region where you want to deploy your virtual network. Consider the geographic location that makes the most sense for your users and applications.

Example: (US) East US.

Picture 4. Fill in the basic details and click on the NEXT button.

Step 6. Go to the Security tab and click on the NEXT button

Picture 5. In the Security tab don’t check anything here and click on the NEXT button

Step 7. Go to the IP Addresses

Address Space

Define the IP address range for your virtual network. This is the range of private IP addresses that resources within the virtual network can use.

Picture 6. Enter your IP address.  And click on the + Add a Subnet button.

Step 8. Configure Subnets

Subnet Name and Address Range

Create one or more subnets within your virtual network. Subnets help you organize and segment your network. For each subnet, define a name and specify its address range.

Picture 7. Click on the Add button.

Picture 8. Click on the Review + Create button.

Step 9. Review and Create

Review all the configurations you've made so far. Once satisfied, click on the "Create" button to deploy your virtual network. The deployment process may take a few minutes.

Picture 9. Summary and Click on the Create button.

The deployment process may take a few minutes.

Picture 10. After The deployment process. Successfully created CSharp_Corner_VNET.

Conclusion

Creating a virtual network in Azure is a critical step in building a resilient and scalable cloud infrastructure. While it offers numerous advantages, users must be mindful of potential complexities and associated costs. Proper planning, ongoing management, and a solid understanding of Azure networking concepts are essential for harnessing the full benefits of virtual networks in Azure.