300-510 SPRI: Implementing Cisco Service Provider Advanced Routing SolutionsDemo

By Cisco · Question Mode

QuestionQ56

Unicast Routing

Question Image

Refer to the exhibit. A network engineer configured R5 to summarize all OSPF routes, but R4 continues to receive specific routes from R5. The engineer has verified that R5 and R4 have the correct summarization configuration, but R5 is not advertising the summary routes. What action must the engineer take to resolve the issue?

  • A Remove summarization configuration on R5 and configure it on R4
  • B Clear link-state database on both R4 and R5 routers for summarization to work
  • C Configure a sham link between R4 and R5 to support summarization within Area 2
  • D Move R4 and R5 in separate areas as now they maintain the same link-state database
Explanation

OSPF interarea route summarization is performed by an area border router when routes are advertised from one OSPF area into another. Routers within the same area maintain the same link-state database and receive the individual intra-area LSAs, so a summary cannot replace those specific routes within Area 2. R4 and R5 must be placed in separate areas for the summary to be advertised between areas.

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