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

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QuestionQ113

Unicast Routing

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Refer to the exhibit. Routers R2, R3, R4, and R5 are all in the same area, while R1 is in a different area. R3 is overutilized, and the engineer wants to lower its CPU load. The engineer configured R4 to summarize the routes it receives from R5, but R3 is still receiving every R5 route. Which action resolves the issue?

  • A Configure the summary routes on R5.
  • B Configure R4 as a Level 1-Level 2 router.
  • C Configure R2 as a Level 1 router.
  • D Configure R3 in a new area.
Explanation

IS-IS Level 1 routers exchange the link-state information for their own area. Separating R3 into a new area prevents it from receiving the detailed Level 1 route information for R5's area, reducing the link-state processing load. Interarea reachability is carried through Level 2 routing. Cisco documents that Level 1 routing is intra-area and Level 2 routing connects areas.

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