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Nokia 4A0-105 Exam - Topic 5 Question 123 Discussion

Why should you configure send-flush-on failure on your PE routers when using active/standby pseudowires?
C) On failure, the PE sends an LDP flush-all-from-me message to all PE devices in the VPLS. This speeds convergence to the new topology.
A) It flushes the local FDB speeding recovery
B) It discards all packets in the queue and sends icmp-discad messages to the sender. The packets are re-transmitted resulting in no loss of data.
D) It is not important to use send-flush-on-failure as Active/Standby signalling automatically converges the FDB in all VPLS instances

Nokia 4A0-105 Exam - Topic 5 Question 123 Discussion

Actual exam question for Nokia's 4A0-105 exam
Question #: 123
Topic #: 5
[All 4A0-105 Questions]

Why should you configure send-flush-on failure on your PE routers when using active/standby pseudowires?

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Suggested Answer: C

by Johnetta at Apr 05, 2026, 06:44 AM

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Valentin
3 days ago
I feel like option A makes sense too. Speeding recovery is crucial.
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Raylene
9 days ago
I think option C is the best. It helps with quick convergence.
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Olene
14 days ago
Just to clarify, A) really does speed recovery, right?
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Mary
19 days ago
Wait, B) says no data loss? That sounds too good to be true.
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Sharen
24 days ago
C) makes sense, speeding up convergence is key!
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Gregoria
2 months ago
I disagree with D, send-flush is definitely important.
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Alease
3 months ago
A) is spot on, flushing the FDB helps a lot!
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Francene
3 months ago
I feel like B is misleading. Discarding packets and sending ICMP messages doesn't sound like a good way to handle failures.
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Danica
3 months ago
I'm a bit confused about D. It seems like it downplays the importance of send-flush-on-failure, but I feel like there must be a reason to configure it.
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Mica
4 months ago
I remember practicing a question about FDB recovery, so A might be the one since it mentions speeding recovery.
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Fannie
4 months ago
I think option C sounds familiar because it talks about LDP messages, but I'm not entirely sure if it's the right answer.
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