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

By Cisco · Question Mode

QuestionQ27

Unicast Routing

Refer to the exhibit.

Question Image

An engineering team deployed IS-IS across the network with several distinct areas. Recently, router R6 in Area 3 has experienced excessive CPU usage. To reduce the load, a network engineer configured route summarization on R2. However, R6 continues to receive the complete routes from all routers. What action must the engineer take to resolve the excessive CPU usage?

  • A Configure all routers as Level 1/2 routers so that route summarization functions throughout the network.
  • B Configure routers R3 and R5 to send summary routes to R6.
  • C Configure the Level 2 router R6 to manage summarization for the network.
  • D Configure router R1 to send only the default route to R2 and R4.
Explanation

IS-IS summarizes Level 1 routes when they are advertised into the Level 2 backbone. R3 and R5 are the Level 1/2 border routers, so they must originate the summary advertisements toward the Level 2 router R6. Summarization on R2, a Level 1 router, does not reduce the Level 2 route information received by R6.

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