QuestionQ225

MPLS and Segment Routing

Question Image

Refer to the exhibit. The service provider offers IPv6 connectivity to large enterprise customers whose offices span several geographic regions. SRv6 operates in the service provider core. The provider has just signed a contract with a new customer that still runs IPv4. The new customer requires connectivity between its two sites, connected through CE1 and CE2, as well as to the internet. Which action must the service provider’s network-engineering team take to provide connectivity across the SRv6 data plane?

  • A Encapsulate IPv4 traffic from the CEs on their respective PEs through a ТЕ path between PE1 and PE2.
  • B Translate the IPv4 addresses to an IPv6 address on each CE
  • C Redistribute the IPv4 routes from CE2 and CE1 on their respective PEs.
  • D Implement an NTP master and sync the timers on the P and PE routers.
Explanation

An IPv4 customer packet must be encapsulated at the ingress PE for carriage over the IPv6-based SRv6 core and decapsulated at the egress PE. This preserves the customer’s IPv4 addressing while allowing the SRv6 transport path between the PEs to forward the traffic.

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