300-515 SPVI: Implementing Cisco Service Provider VPN ServicesDemo

By Cisco · Question Mode

QuestionQ7

Layer 3 VPNs

A company’s CTO needs a network consultant’s support to deliver an MPLS solution without sacrificing a required level of redundancy and scalability. Which solution scales effectively to hundreds or thousands of sites?

  • A L2VPN with the broadcast traffic processed at the ingress PE.
  • B L3VPN with direct LSP connectivity between all PEs.
  • C L2VPN by encapsulating multiple frame formats with interworking.
  • D L3VPN using a hierarchical topology of N-PEs and U-PEs.
Explanation

A hierarchical L3VPN topology with N-PEs and U-PEs scales large MPLS VPN deployments by separating customer-facing PE functions from the core-facing hierarchy. This avoids requiring direct LSP connectivity between every PE while retaining redundant connectivity options.

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