Nokia Exam 4A0-C02 Topic 12 Question 81 Discussion

Actual exam question for Nokia's 4A0-C02 exam

Question #: 81
Topic #: 12

Click on the exhibit below.

In the diagram below, SAP 1 is put into the blocking state as a result of the spanning tree protocol. What will occur in the VPLS instance if SAP 2 goes down and SAP 1 transitions to the forwarding state? Select the most accurate statement.

AA Spanning Tree BPDU will be sent across the mesh flushing the FDB table in all devices participating in the VPLS instance.

BStale information will be used within the VPLS instance to forward traffic until the FDB ages out.

CAn LDP control message will be sent to all devices in the mesh participating in the VPLS instance. Only MAC addresses associated with the PE that the failure occurred on will be flushed.

DAn LDP control message will be sent to all devices in the mesh participating in the VPLS instance. The entire FDB in the VPLS instance will be flushed.

Show Suggested Answer

Suggested Answer: C

by Noah at Mar 10, 2024, 10:20 AM

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Jenise

1 months ago

I'm torn between options C and D, but I think D is the better choice. Flushing the entire FDB in the VPLS instance is the safest and most comprehensive way to handle this scenario.

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Junita

8 days ago

SAP 1 transitioning to the forwarding state will trigger the flushing of the entire FDB in the VPLS instance.

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Xuan

1 months ago

Haha, I can just imagine the network admin frantically hitting the 'Flush FDB' button after SAP 2 goes down. 'Time to hit the reset button on this whole thing!'

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Jean

4 days ago

User 3: The network admin must be really stressed out when something like that happens.

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Nettie

14 days ago

User 2: Yeah, I agree. It makes sense to flush the entire FDB in that situation.

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Dusti

21 days ago

User 1: I think option D is the correct one.

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Wynell

2 months ago

Option C doesn't quite make sense to me. Why would only the MAC addresses associated with the PE where the failure occurred be flushed? That seems too limited in scope for the VPLS instance.

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Ocie

5 days ago

Yeah, option D seems like the best choice for maintaining network stability in the VPLS instance.

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Truman

8 days ago

I agree, option C does seem a bit limited. Flushing the entire FDB would ensure that all devices have up-to-date information.

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Thurman

23 days ago

I think option D makes more sense. Flushing the entire FDB in the VPLS instance seems like a more comprehensive solution.

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Bernardo

2 months ago

I'm a bit skeptical about option B. Relying on stale information doesn't sound like a reliable solution, especially in a VPLS instance. The FDB needs to be properly updated to ensure proper forwarding.

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Floyd

16 days ago

Zona: That sounds like a more reliable solution for maintaining proper forwarding in a VPLS instance.

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Zona

17 days ago

User 2: I think option D makes more sense, flushing the entire FDB for a fresh start.

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Tijuana

19 days ago

User 1: I agree, relying on stale information doesn't seem like a good idea.

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Deonna

2 months ago

Option D seems the most accurate. If SAP 2 goes down and SAP 1 transitions to forwarding, an LDP control message will be sent to all devices in the VPLS instance, resulting in a full FDB flush. Simple and straightforward.

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