When some things proliferate rapidly enough, it’s sometimes hard to ask the basic questions. This post is going to focus on the much-needed transition in the cloud and networking world––from IPv4 to IPv6, and hopefully answer the questions you were too afraid of asking at this point. This deprecation is likely one of the most pivotal ones in recent years for cloud networking, and comes with its own set of challenges and complexities, which we’d like to break down.

The transition from IPv4 to IPv6 is not just a technical upgrade, but also a strategic move towards more efficient and cost-effective network management. This is because as organizations increasingly adopt cloud services, the limitations of IPv4 are simply not withstanding the test of time, and are becoming increasingly apparent. That is why the shift to IPv6 is actually quite critical for future growth and sustainability of cloud native operations at scale. IPv6 is not solely a crucial technical transition, but also has a direct impact on cloud costs, bringing with it a substantial economic incentive.

That is also why early on, Firefly focused on making the IPv6 migration simpler for organizations through seamless integration with AWS and other cloud services. This blog aims to demystify some of the complexities of this migration, while at the same time highlighting how Firefly's asset management capabilities can make this transition smoother and more manageable.

The Need for IPv6 – A Non-Technical Perspective

IPv4 has been the backbone of internet communications since its inception. However, by design, through its 32-bit addressing scheme, has a finite number of addresses––limiting the number of addresses available for public internet-connected devices, unable to accommodate the increasing demand of the digital world. The IPv6 128-bit addressing scheme addresses this limitation with a vastly larger address space, ensuring scalability and future-proofing network infrastructures.

From a non-technical standpoint, the migration to IPv6 is not just about keeping up with technological advancements, but also provides a number of competitive advantages as well. As noted IPv6, not only provides enhanced performance, but critical security features and improvements, and a reduction in cloud costs––which we will dive into further. This is particularly significant as cloud services become a central part of business expenditure and operations.

The comprehensive view provided in the Firefly platform of an organization's cloud assets, helps identify key areas where IPv6 migration can lead to cost efficiencies. This insight is invaluable for decision-makers who might not have a deep technical background but need to understand the economic impact of the migration.

Technical Overview of IPv6 Migration

Technically, IPv6 represents a major leap forward. Its most apparent advantage is the almost limitless number of IP addresses it offers, solving the address exhaustion problem inherent to IPv4. This vast address space facilitates not only current needs but also accommodates the explosive growth of IoT devices and emerging technologies.

Migrating to IPv6 in an AWS environment involves several critical steps. We will walk you through a step-by-step guide below for how to get started with your migration in the AWS ecosystem, however the general guide holds true for all clouds.  

Getting Started with your IPv6 Migration:

  • Allocate IPv6 Addresses: Assign IPv6 addresses to EC2 instances, ensuring each instance is correctly associated with the new address.
  • Subnet Configuration: Update subnets to support IPv6, which involves adding IPv6 CIDR blocks to the VPC and subnets.
  • Update Security Groups and Route Tables: Modify these to allow IPv6 traffic, a crucial step for maintaining security and connectivity.
  • Application Compatibility: Ensure applications running on EC2 are compatible with IPv6, potentially requiring updates or modifications.
  • DNS Configuration: Update DNS records to point to IPv6 addresses of instances.
  • Removing Public IPv4 Addresses: Once IPv6 is fully operational, remove public IPv4 addresses, a step that can be managed through the EC2 console or AWS CLI.
  • Testing: Conduct thorough testing to ensure all services are accessible and functioning correctly over IPv6.

Like many upgrades or migrations to new technology, there are a number of steps that need to be taken in order to ensure a smooth transition, and that service is not disrupted. This starts with allocating IPv6 addresses to all of your EC2 instances. This includes adding an IPv6 CIDR block to your VPC and subnets, a fundamental step in the migration process. Next, in order to ensure robust security, your security groups and route tables must also be modified to allow IPv6 traffic. This ensures that security protocols are correctly configured for both incoming and outgoing IPv6 traffic. 

Once the infrastructure is properly configured, we need to ensure our applications are properly functioning as well, where   application compatibility is a key consideration. Applications running on EC2 instances must be checked and potentially modified to work efficiently with IPv6.

Overcoming Challenges and Limitations

Migrating to IPv6, while beneficial, comes with a unique set of challenges. A significant issue is ensuring application compatibility, as not all applications are immediately ready for IPv6. This requires thorough testing and potential code modifications. 

Another challenge it is important to validate is user connectivity, as not all end-users may have IPv6 capabilities, which could limit access to services post-migration.

Firefly’s Role in Migration

While these steps outline the technical process, Firefly simplifies this transition by offering a clear view of all cloud assets and their configurations. This  enables teams to manage these changes effectively, ensuring a smooth transition to IPv6.  Like in the AWS example above, Firefly’s multi-cloud inventory that tracks all assets, configurations, and changes, is a crucial feature in identifying and managing the components involved in the IPv6 migration. 

The insights, based on Open Policy Agent and Rego that are available, provide added enforcement of configuration rules for even greater governance and security. Moreover, distinguishing between codified, drifted, and unmanaged assets provides clear visibility, enabling teams to prioritize the migration based on operations and security data and criteria.

Firefly assists in identifying the known challenges of IPv6 migration early in the process, enabling teams to strategize and implement necessary changes effectively. Additionally, leveraging the built-in insights can help in maintaining a dual-stack approach, where both IPv4 and IPv6 coexist and can be monitored in Firefly, ensuring uninterrupted service during the transition period.

Testing and Validation with Firefly

Testing is a critical phase in the IPv6 migration process, and that is why it is important to monitor and validate the migration was successful. Tools in the Firefly platform can help identify any issues with asset configurations or connectivity problems that might arise post-migration. This ensures that all services continue to function seamlessly over IPv6, while the insights and event collection features also allow for a detailed analysis of the network's performance post-migration, ensuring that the transition meets the desired objectives and standards.


The migration from IPv4 to IPv6 is an important step in modernizing cloud infrastructure. While it presents technical challenges, the long-term benefits in terms of scalability, security, and cost reduction are no longer nice to have, but will be critical in future-proofing cloud native operations. 

Firefly's cloud asset management platform simplifies this migration, offering a clear path through the complexity. For organizations looking to make this transition, Firefly provides the necessary tools and insights to ensure a smooth process.

We encourage you to "Try Firefly for Free" and experience firsthand how it can streamline your cloud asset management and migration efforts.