300-420 · Question #225
An architect must design an IPv6 migration solution for a corporation with remote offices to support: - The customer has IPv4 peering with their service provider. - IPv6 users need access to IPv4…
The correct answer is D. dual-stack. Given the requirements for IPv6 users to access both IPv4 and IPv6 resources, existing IPv4 peering, and a phased migration, a dual-stack solution is the most appropriate IPv6 migration strategy.
Question
An architect must design an IPv6 migration solution for a corporation with remote offices to support:
- The customer has IPv4 peering with their service provider.
- IPv6 users need access to IPv4 and IPv6 resources.
- Existing content providers will migrate to IPv6 in the next two
years.
- Users will be migrated in a phase-by-phase approach.
Which migration solution must the architect choose?
Options
- ANAT46
- Btunneling
- CNAT64
- Ddual-stack
How the community answered
(44 responses)- A7% (3)
- B18% (8)
- C5% (2)
- D70% (31)
Why each option
Given the requirements for IPv6 users to access both IPv4 and IPv6 resources, existing IPv4 peering, and a phased migration, a dual-stack solution is the most appropriate IPv6 migration strategy.
NAT46 translates IPv4 to IPv6, which is not the primary solution for IPv6 users needing access to IPv4 resources, nor for a gradual, coexisting migration.
Tunneling solutions encapsulate IPv6 over IPv4 or vice versa, but they do not inherently provide direct access for IPv6 users to IPv4 resources in a general enterprise context and are often considered temporary mechanisms.
NAT64 translates IPv6 to IPv4, allowing IPv6-only clients to access IPv4-only servers, but it requires DNS64 and doesn't directly address the need for users to access both IPv4 and IPv6 resources without translation for the latter.
Dual-stack allows network devices and applications to simultaneously support both IPv4 and IPv6 protocols. This is ideal for a phased migration, enabling IPv6-enabled users to access both existing IPv4 resources and new IPv6 services seamlessly without requiring complex translation mechanisms for all communications.
Concept tested: IPv6 migration strategy - dual-stack
Source: https://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ipv6-for-ip-ngn/white-paper-c11-730691.html
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