300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

By Cisco · Question Mode

QuestionQ177

Layer 3 Technologies

How are routes advertised by CE routers separated from those of other CE routers on an MPLS PE router?

  • A with a combination of VRF-Lite and MP-BGP
  • B by pushing MPLS labels advertised by LDP on customer routes
  • C by enabling multiple instances of BGP, one for each CE router
  • D by assigning CE-facing interfaces to different VRFs
Explanation

MPLS Layer 3 VPNs use separate VRFs to maintain distinct routing and forwarding tables for each customer VPN. Assigning each CE-facing interface to its appropriate VRF places that CE’s learned routes in the corresponding isolated routing domain.

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