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which routes will be advertised to OSPF neighbors because of the demo policy?

Given the configuration and routing table in the exhibit, which routes will be advertised to OSPF neighbors because of the demo policy?

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A.
192.168.0.0/16 only

B.
192.168.0.0/17 only

C.
192.168.50.0/24 and 192.168.51.0/24

D.
192.168.0.0/17, 192.168.50.0/24 and 192.168.51.0/24

7 Comments on “which routes will be advertised to OSPF neighbors because of the demo policy?

  1. Wayne King says:

    This answer is not correct. OSPF has a default export policy of “Reject everything,” as LSAs are flooded by default. The default export policy blocks the advertising of additional routes from other sources, static and aggregate in this case. So, without an added term that accepts something else, nothing would be advertised as a result of this applied policy.




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    1. cola says:

      D is correct answer:
      Route filters are lists of prefixes configured within a single routing policy or policy term. They provide a few more match types for selecting prefixes you can specify an optional action to be taken if the route-filter statement matches.

      This action is executed immediately after the match occurs, and the then statement is not evaluated.




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  2. Eric Lecht says:

    Well, I thought the answer was wrong too, but for a different reason. I noticed the 192.168.0.0/17 is an AGGREGATE route.
    I understand aggregate routes are never routed ….. especially into OSPF? Which knows nothing about aggregates?
    I know I must be missing something here …..




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