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

By Cisco · Question Mode

QuestionQ169

Layer 3 Technologies

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Refer to the exhibit. An engineer recently changed the area 3 configuration so that it accepts only Type 1, 2, and 3 LSAs. Immediately after the change, users connected to router R6 started reporting connectivity problems. Which configuration restores connectivity to R6 while meeting the requirement?

  • A
  • B
  • C
  • D
Explanation

A standard OSPF stub area allows intra-area Type 1 and Type 2 LSAs and interarea summary Type 3 LSAs, while preventing external Type 5 LSAs. The no-summary option on an ABR suppresses Type 3 summary LSAs, creating a totally stubby area and therefore does not meet the requirement. Every router connected to the stub area must use the stub-area configuration; configuring area 3 stub on both R19 and R6 restores their adjacency and the required LSA scope.

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