Cisco
400-007 · Question #198
400-007 Question #198: Real Exam Question with Answer & Explanation
The correct answer is D: Layer 2 switches will not affect the implementation of IPv6. They can be included in the design in. Layer 2 switches forward frames based on MAC addresses and are IPv6-agnostic, so they do not need to be replaced or upgraded during an IPv6 migration.
Question
Company XYZ is migrating their existing network to IPv6 and they must plan for Layer 2 and Layer 3 devices. Some of the access layer switches do not support IPv6, however, core and distribution switches fully support unicast and multicast routing. The company wants to minimize cost of the migration. Which migration strategy should be used in the design?
Options
- AThe access layer switches must support IGMP snooping at a minimum. Any switches that do not
- BThe access layer switches must support DHCPv6. Any switches that do not support DHCPv6
- CUpgrade the nonsupporting switches. Otherwise, it will cause an issue with the migration.
- DLayer 2 switches will not affect the implementation of IPv6. They can be included in the design in
Explanation
Layer 2 switches forward frames based on MAC addresses and are IPv6-agnostic, so they do not need to be replaced or upgraded during an IPv6 migration.
Common mistakes.
- A. IGMP snooping is a multicast optimization feature and is not a requirement for basic IPv6 unicast forwarding on a Layer 2 access switch.
- B. DHCPv6 is a Layer 3 address assignment protocol handled by routers or dedicated servers, not a capability that needs to reside on Layer 2 access switches.
- C. Upgrading all non-supporting access switches would significantly increase migration cost, contradicting the stated goal of minimizing cost when those switches are Layer 2 only and do not need IPv6 awareness.
Concept tested. IPv6 migration strategy with Layer 2 switches
Community Discussion
No community discussion yet for this question.