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

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QuestionQ158

Routing Policy and Manipulation

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Refer to the exhibit. A network engineer configured the redistribute connected subnets route-map filtering command on R1 to redistribute connected interfaces into the OSPF process. The engineer also wants to filter out IP address 10.0.1.0/24, but the prefix still appears in the routing tables of the other routers on the network. Which action corrects the issue?

  • A Change the deny statement in access list 2 to permit.
  • B Remove the subnets keyword from the redistribute connected subnets route-map filtering command.
  • C Add a set statement to route-map sequence 20.
  • D Remove route-map sequence 30.
Explanation

For route-map matching, an access-list entry must permit a route for the match ip address clause to match. Because access list 2 denies 10.0.1.0/24, route-map sequence 20 does not match; evaluation reaches the empty permit sequence 30, which permits redistribution. Changing access list 2 from deny to permit causes the prefix to match route-map sequence 20, whose deny action prevents redistribution.

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