Microsoft Azure

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Exploring Azure’s Readiness for IPv6 in its Public Cloud

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When we connect machines over the internet, we usually use IPv4 addresses. You might have heard about IPv4 address exhaustion, which means we’re running out of these addresses. Eventually, we won’t be able to get new IPv4 addresses to connect over the internet. People have talked about IPv6 as a solution to this problem, but will it help?

To answer this question, we must examine the actions taken by Azure to include IPv6 support in its infrastructure. Microsoft Azure has shown a commitment to IPv6 adoption, acknowledging its relevance in assuring the scalability and sustainability of its services.

This blog article will cover Azure’s cloud services and their preparation for IPv6 in its public cloud.

IPv6 Support for Virtual Networks

One significant milestone in Azure’s IPv6 journey is introducing IPv6 support for virtual networks. Azure customers can deploy and manage virtual machines, containers, and other resources using IPv6 addresses within their network environments.

VM Serverless/Function Azure Kubernetes Service (AKS)
Dual-stack support (Both IPv4 and IPv6) Yes No Yes (Preview)
IPv6-only support Yes No Yes
IPv6-only support Yes
IPv6 to Pods Yes
IPv6 to Services Yes

By enabling IPv6 within virtual networks, Azure empowers organizations to embrace the benefits of IPv6 connectivity and leverage its inherent advantages regarding address space and network efficiency.

Azure Virtual Network
Dual-stack support (Both IPv4 and IPv6) Yes
IPv6-only support Yes
DHCPv6 support Yes
Peering support Yes
Network access controls List Support (NSG) Yes

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Load Balancer Support for IPv6

Azure’s load balancers have also been updated to extend support for IPv6. This feature allows businesses to efficiently distribute incoming traffic to IPv6-enabled resources, facilitating seamless communication and enhancing accessibility for users and applications.

Azure Load Balancer
Dual-stack support (Both IPv4 and IPv6) Yes
IPv6-only support No
Internal and external Load balancer support Yes
IPv6 backend pool support Yes

Full Integration with Azure DNS

In addition to virtual networks and load balancing, Azure’s Domain Name System (DNS) service, Azure DNS, fully supports IPv6. This feature enables Azure customers to manage domain names and resolve IPv6 addresses for their resources, facilitating seamless communication and connectivity in IPv6-enabled environments.

Azure DNS
IPv6 Records support (AAAA) Yes
IPv6-Public IP address DNS resolution Yes
IPv6-Private IP address DNS resolution Yes

Considerations and Future Outlook

While Azure has made significant progress in IPv6 integration, it is essential to acknowledge that the transition to IPv6 is an ongoing process, and some legacy services or features within Azure may still rely primarily on IPv4. Therefore, businesses considering IPv6 deployment on Azure should comprehensively evaluate their specific needs and ensure compatibility with IPv6-enabled services.


In conclusion, this blog article will cover Azure’s cloud services and their preparation for IPv6 in its public cloud.

Azure’s public cloud infrastructure has made substantial progress in becoming IPv6-ready. Azure delivers a robust platform for enterprises wishing to embrace IPv6 and future-proof their infrastructure, with extensive support for it in virtual networks, load balancers, and DNS services.

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About CloudThat

Established in 2012, CloudThat is a leading Cloud Training and Cloud Consulting services provider in India, USA, Asia, Europe, and Africa. Being a pioneer in the cloud domain, CloudThat has special expertise in catering to mid-market and enterprise clients from all the major cloud service providers like AWS, Microsoft, GCP, VMware, Databricks, HP, and more. Uniquely positioned to be a single source for both training and consulting for cloud technologies like Cloud Migration, Data Platforms, DevOps, IoT, and the latest technologies like AI/ML, it is a top-tier partner with AWS and Microsoft, winning more than 8 awards combined in 11 years. Recently, it was recognized as the ‘Think Big’ partner from AWS and won the Microsoft Superstars FY 2023 award in Asia & India. Leveraging its position as a leader in the market, CloudThat has trained 650k+ professionals in 500+ cloud certifications and delivered 300+ consulting projects for 100+ corporates in 28+ countries.

WRITTEN BY Siddhartha Rajbhatt



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