300-420 Question 56
Select 3An enterprise network is migrating its infrastructure to support both IPv4 and IPv6 using a dual-stack approach. The network manager wants to ensure that both protocols can coexist without disrupting existing IPv4 traffic. Which of the following design considerations should be followed to implement native dual-stacking effectively?
- A
Ensure all devices in the network, including routers and switches, support both IPv4 and IPv6 protocols.
- B
Manually configure IPv6 addresses for all end devices to avoid conflicts with IPv4 addresses.
- C
Deploy a routing protocol that supports both IPv4 and IPv6, such as OSPFv3 or MP-BGP.
- D
Implement NAT64 to translate IPv4 traffic into IPv6 within the dual-stack environment.
- E
Validate that applications and services support IPv6 to ensure seamless operation in the dual-stack environment.
Show answer and explanation
Correct answers: A, C, E
Explanation
To implement a native dual-stack environment effectively, all network devices must support both IPv4 and IPv6 protocols, and the routing infrastructure must support dual-protocol communication using protocols like OSPFv3 or MP-BGP. Additionally, verifying that applications and services are IPv6-capable ensures a seamless user experience. NAT64 is unnecessary in a dual-stack design, and manual IPv6 address configuration is generally avoided due to scalability concerns.
- A. Correct.
Ensuring all devices support both IPv4 and IPv6 is critical for implementing native dual-stacking. Without dual-protocol support, devices cannot process both types of traffic simultaneously.
- B. Incorrect.
Manually configuring IPv6 addresses for all devices is unnecessary and not scalable in larger networks. IPv6 autoconfiguration mechanisms, such as SLAAC or DHCPv6, can be used instead.
- C. Correct.
Deploying a routing protocol that supports both IPv4 and IPv6 ensures efficient routing in a dual-stack environment. Protocols like OSPFv3 or MP-BGP are designed to handle both protocols.
- D. Incorrect.
NAT64 is a translation mechanism for communication between IPv4 and IPv6-only networks. It is not required in a native dual-stack environment where both protocols coexist natively.
- E. Correct.
Validating application and service compatibility with IPv6 is crucial to avoid disruptions during the migration to dual-stacking. Applications that only support IPv4 may cause operational issues.