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Nokia 4A0-106 Exam - Topic 6 Question 94 Discussion

You are configuring spoke SDP termination of a VPLS service on a VPRN interface on an Nokia 7750 SR. The spoke SDP is running over a NULL encapsulated network port. The best practice is to set the VPRN interface p-mtu equal to what value over a NULL encapsulated network port.
B) The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP
A) The SDP path-MTU minus 14
C) The configured service-mtu of the VPLS service
D) The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP minus14
E) The SDP path-MTU

Nokia 4A0-106 Exam - Topic 6 Question 94 Discussion

Actual exam question for Nokia's 4A0-106 exam
Question #: 94
Topic #: 6
[All 4A0-106 Questions]

You are configuring spoke SDP termination of a VPLS service on a VPRN interface on an Nokia 7750 SR. The spoke SDP is running over a NULL encapsulated network port. The best practice is to set the VPRN interface p-mtu equal to what value over a NULL encapsulated network port.

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Suggested Answer: B

by Raina at Nov 21, 2025, 09:08 PM

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Lili
29 days ago
I feel like A is the best practice. Always account for overhead!
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Wava
1 month ago
I’m not sure, but E sounds too simple.
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Francoise
1 month ago
D seems right. LDP bindings are key for MTU.
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Lai
1 month ago
I lean towards A. Adjusting for the overhead makes sense.
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Bronwyn
2 months ago
I think it's option C. Service-MTU is crucial.
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Malinda
2 months ago
LMTU from LDP bindings is also a good point to consider.
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Willodean
2 months ago
Wait, why minus 14? That seems odd.
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Rana
2 months ago
Agree, the path-MTU is key here!
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Fatima
2 months ago
I thought it was the service-mtu of the VPLS service?
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Mari
3 months ago
It's definitely the SDP path-MTU minus 14.
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Salina
3 months ago
The SDP path-MTU minus 14? Sounds like a job for a calculator and a lot of patience.
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Ruthann
3 months ago
Wait, is this a trick question? I'm just going to go with the SDP path-MTU and hope for the best.
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Earnestine
3 months ago
The LMTU minus 14? Sounds like they're trying to trip us up. I'll stick with the SDP path-MTU.
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Gearldine
4 months ago
The SDP path-MTU minus 14? Sounds like a recipe for a headache, but I guess that's what we're here for.
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Remona
4 months ago
C'mon, the service-MTU of the VPLS service? That's way too obvious. I'm going with the SDP path-MTU.
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Alva
4 months ago
The LMTU on the VPLS side? Seriously, why can't they just make this simple?
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Edison
4 months ago
The SDP path-MTU minus 14 sounds about right. I mean, who doesn't love a good MTU adjustment?
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Kerry
4 months ago
I’m leaning towards the option that involves the LMTU minus 14, but I’m confused about how that interacts with the NULL encapsulation.
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Ciara
5 months ago
I feel like the configured service-mtu of the VPLS service is the right choice, but I can't recall if there are exceptions for NULL encapsulated ports.
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Leana
5 months ago
I remember practicing a similar question where we had to consider the LMTU from the router LDP bindings. Could that be relevant here too?
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Jordan
5 months ago
Ah, I see. The question is specifically asking about a NULL encapsulated network port, so that narrows down the options. I think I've got this one figured out now.
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Lucina
5 months ago
Based on my understanding, the best practice is to set the VPRN interface p-mtu to the SDP path-MTU minus 14. That seems to be the most logical choice here.
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Bettina
5 months ago
I'm a bit confused on the concept of LMTU and how that relates to the VPLS service-MTU. I'll need to review that before answering.
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Kimbery
6 months ago
I think the p-mtu should be set to the SDP path-MTU minus 14, but I'm not entirely sure why that specific adjustment is necessary.
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Twanna
6 months ago
B could be the answer. LMTU is important in VPLS.
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Casie
6 months ago
Okay, let's see. I think the key here is understanding how the VPLS service and the NULL encapsulated network port interact.
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Azzie
7 months ago
Hmm, this looks like a tricky one. I'll need to think through the different options carefully.
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Titus
24 days ago
What about option D? Seems reasonable too.
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Brande
5 months ago
I think option C makes sense.
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Jesusita
6 months ago
This is definitely a tough question.
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Salena
6 months ago
I’m leaning towards option E.
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