Dual Stack is the most recommended method because globally not 50% of networks handle IPv6. By having IPv4 and IPv6 configured on the network, IPv6 has priority. In the event that a page does not handle IPv6, then the exit to the Internet will be via IPv4, meaning that IPv6 will have priority.

The use of Dual Stack is one of the most recommended and widely adopted methods for IPv6 deployment, especially during the transition from IPv4 to IPv6.

Dual Stack allows devices and networks to operate with both Internet protocols, IPv4 and IPv6, simultaneously, offering several important advantages:

1. Compatibility:

Dual Stack ensures compatibility with systems and networks that still operate exclusively on IPv4. This is crucial during the transition period, as there is still a significant amount of content and services on the Internet that are only available over IPv4.

2. Smooth Transition:

It enables a smoother transition to IPv6, making it easier for organizations to deploy IPv6 without disrupting access to resources that still require IPv4. This is especially important to avoid connectivity issues during the migration process.

3. Operational Flexibility:

By operating networks on Dual Stack, network administrators can experiment and troubleshoot IPv6 issues while maintaining normal operation of their existing services on IPv4. This provides a flexible operating environment where new IPv6 deployments and configurations can coexist with existing IPv4 infrastructure.

4. Facilitates IPv6 Adoption:

Dual Stack encourages gradual adoption of IPv6 by allowing devices and services to be accessible using both protocols. This is important to build a critical mass of content and services accessible over IPv6, which in turn encourages more organizations to make the transition.

Implementation:

To implement Dual Stack, devices and routers must be configured to handle both protocols. This usually involves:

• Ensure that the hardware and operating system support IPv6.
• Configure both IPv4 and IPv6 addresses on network interfaces, systems and services.
• Adjust security policies and network devices (such as firewalls and intrusion prevention systems) to properly handle IPv6 traffic.

Considerations:

Although Dual Stack is an effective strategy for IPv6 deployment, it requires careful planning and attentive network management. It is important to consider the potential increase in configuration complexity and the need to maintain two network protocol stacks in parallel.

In summary, Dual Stack offers a pragmatic and effective strategy to facilitate the transition to IPv6, ensuring interoperability and service continuity during the migration process.