Router R2 advertises the network 192.168.3.0/24 to router R1 via OSPF. A route policy has been constructed to discard the route on router R1; however, it is not working. What is the problem?
A.
The prefix list reject should be "192.168.3.0/16 exact".
B.
Router R1 should be configured as an OSPF "asbr".
C.
The policy "reject" should be set for import rather than export.
D.
The policy was likely not "committed" after creation.
E.
This is not possible because OSPF cannot use import policies.
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Route Policies):
“Export policies control what routes the router advertises to neighbors. Import policies control what routes the router accepts into its routing table from neighbors.”
The goal is to reject the OSPF route learned from R2.
Since R1 is receiving routes via OSPF, an IMPORT policy is required.
Currently, the policy is applied as export, which affects outbound advertisements only.
Thus, correct answer is C
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