Which of the following descriptions of 6PE and 6VPE is correct?

Question

Options

• AIn 6PE networking mode, the IPv6 address on the CE side can be reused.
• BIn 6VPE networking mode, PE does not need to create a VPN instance
• CIn 6VPE networking mode, the IPv6 address on the CE side can be reused.
• DIn 6PE networking mode, PE needs to create a VPN instance

• A
  7% (2)
• B
  3% (1)
• C
  79% (23)
• D
  10% (3)

Explanation

6VPE uses VPN instances (VRFs) per customer, which creates isolated routing tables and allows different customers to use overlapping IPv6 address spaces - making C correct. This is the defining architectural difference between the two technologies: 6VPE extends MPLS L3VPN to IPv6, inheriting the address-reuse capability that VRFs provide.

Why the distractors are wrong:

• A is wrong because 6PE uses a single shared global IPv6 routing table (no VRFs), so all CE-side addresses must be globally unique - reuse is not possible.
• B is wrong because VPN instance creation is required in 6VPE - that's precisely what enables per-customer routing isolation and is central to how 6VPE works.
• D is wrong because it incorrectly attributes VPN instance creation to 6PE. 6PE routers carry IPv6 over an MPLS backbone without VRFs, relying on a single global table.

Memory tip: The "V" in 6VPE stands for VPN instance (VRF) - wherever you see the V, think "VRF = isolation = address reuse allowed." No V (6PE) means no VRF, no reuse.

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