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

Actual exam question for Nokia's 4A0-105 exam

Question #: 123
Topic #: 5

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

AIt flushes the local FDB speeding recovery

BIt 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.

COn 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.

DIt is not important to use send-flush-on-failure as Active/Standby signalling automatically converges the FDB in all VPLS instances

Show Suggested Answer

Suggested Answer: C

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

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Francene

8 days 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

13 days 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

18 days 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

23 days 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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