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

By Cisco · Question Mode

QuestionQ222

VPN Technologies

How is VPN routing information distributed within an MPLS network?

  • A The top level of the customer data packet directs it to the correct CE device.
  • B It is established using VPN IPsec peers.
  • C It is controlled through the use of RD.
  • D It is controlled using of VPN target communities.
Explanation

VPN routing information distribution is controlled by VPN route-target communities, implemented as BGP extended communities. Export route targets are attached to VPN routes, and each VRF imports routes whose route targets match its configured import targets. A route distinguisher only makes VPN prefixes unique; it does not control route distribution.

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