JN0-694 · Question #41
You notice that there is a problem with the OSPF adjacency between two routers, R1 and R2. The relevant system logs from R1 are shown in the exhibit. Jun 12 02:56:06 R1 rpd[60735]: RPD_OSPF_NBRDOWN…
The correct answer is A. R2 was dropping R1's OSPF hello packets. See the full explanation below for the reasoning.
Question
You notice that there is a problem with the OSPF adjacency between two routers, R1 and R2. The relevant system logs from R1 are shown in the exhibit. Jun 12 02:56:06 R1 rpd[60735]: RPD_OSPF_NBRDOWN: OSPF neighbor 10.50.10.25 (realm ospf-v2 fe- 0/0/4.0 area 0.0.0.0) state changed from Full to Init due to 1WayRcvd (event reason: neighbor is in one-way mode) Jun 12 02:59:36 R1 rpd[60735]: RPD_OSPF_NBRUP: OSPF neighbor 10.50.10.25 (realm ospf-v2 fe- 0/0/4.0 area 0.0.0.0) state changed from Init to ExStart due to 2WayRcvd (event reason: neighbor detected this router) Jun 12 02:59:36 R1 rpd[60735]: RPD_OSPF_NBRUP: OSPF neighbor 10.50.10.25 (realm ospf-v2 fe- 0/0/4.0 area 0.0.0.0) state changed from Exchange to Full due to ExchangeDone (event reason: DBD exchange of slave completed) What would cause this behavior?
Options
- AR2 was dropping R1's OSPF hello packets.
- BR1 was dropping R2's OSPF hello packets.
- CR1's interface went down and came back up.
- DThere is an OSPF hello timer mismatch between the two routers.
How the community answered
(31 responses)- A81% (25)
- B3% (1)
- C6% (2)
- D10% (3)
Community Discussion
No community discussion yet for this question.