300-420 Question 54
Select 3A large enterprise network is undergoing a migration from IPv4 to IPv6 to support modern applications while maintaining compatibility with legacy systems. The network administrator decides to implement a dual-stack approach across the network. Which of the following considerations are essential for ensuring a successful native dual-stack implementation?
- A
Ensure that all network devices, including routers and switches, support both IPv4 and IPv6 protocols.
- B
Configure NAT64 to translate IPv6 traffic into IPv4 traffic for all communications within the network.
- C
Verify that routing protocols, such as OSPF or BGP, are enabled and configured to support both IPv4 and IPv6.
- D
Allocate sufficient IPv6 address space and ensure proper IPv6 address planning.
- E
Disable IPv4 on devices to prioritize IPv6 traffic in the dual-stack environment.
Show answer and explanation
Correct answers: A, C, D
Explanation
Native dual-stacking allows IPv4 and IPv6 to operate simultaneously on the same infrastructure. To implement dual-stack successfully, it is crucial that devices support both protocols, routing protocols are configured to handle both IPv4 and IPv6, and proper IPv6 address planning is performed. NAT64 is not needed in native dual-stack as both protocols coexist natively, and disabling IPv4 would negate the coexistence benefits of dual-stacking.
- A. Correct.
Correct. Dual-stack requires that devices fully support both IPv4 and IPv6 protocols to handle traffic natively without translation mechanisms.
- B. Incorrect.
Incorrect. NAT64 is not required in a native dual-stack environment as both IPv4 and IPv6 can coexist without translation.
- C. Correct.
Correct. Dual-stack environments must ensure that routing protocols are configured to handle both IPv4 and IPv6 routes for proper traffic forwarding.
- D. Correct.
Correct. Proper IPv6 address planning is critical to ensure sufficient address space allocation and to avoid potential conflicts or inefficiencies.
- E. Incorrect.
Incorrect. Disabling IPv4 in a dual-stack environment defeats the purpose of supporting both protocols simultaneously for compatibility and gradual migration.