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Huawei H19-401_V2.0 Exam - Topic 13 Question 3 Discussion

What is the single-link failover time supported by Huawei's M-LAG solution?
A) < 50 ms
B) < 400 ms
C) < 2s
D) < 1s

Huawei H19-401_V2.0 Exam - Topic 13 Question 3 Discussion

Actual exam question for Huawei's H19-401_V2.0 exam
Question #: 3
Topic #: 13
[All H19-401_V2.0 Questions]

What is the single-link failover time supported by Huawei's M-LAG solution?

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Suggested Answer: A

M-LAG (Multichassis Link Aggregation Group) is a key reliability technology in the Huawei Xinghe Intelligent Campus architecture. It provides device-level redundancy by virtualizing two switches into a single logical entity. One of the primary performance requirements for M-LAG in high-availability designs is ensuring millisecond-level failover. In the event of a single link failure (e.g., an uplink from an access switch to one of the M-LAG core switches), the traffic is rerouted through the peer-link or the remaining active member of the Eth-Trunk in less than 50 ms, ensuring 'hitless' service for sensitive applications like voice or industrial control.


by Louisa at May 02, 2026, 11:03 PM

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Paola
2 days ago
Nah, M-LAG is designed for speed. A) is the best choice.
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Tamesha
7 days ago
But what if it's B) 400 ms? Seems more realistic.
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Caren
12 days ago
I agree, A) makes sense for M-LAG.
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Gail
17 days ago
I think it's A) < 50 ms. That's super fast!
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Janet
23 days ago
True, but we should consider real-world scenarios too.
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Kanisha
28 days ago
A) < 50 ms is the ideal. Anything slower isn't optimal.
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Jin
1 month ago
I’m leaning towards D) 1s. Just to be cautious.
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Argelia
1 month ago
I feel confident about A. Huawei focuses on low latency.
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Alesia
1 month ago
But M-LAG is designed for speed, so A is likely right.
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Lemuel
2 months ago
B) < 400 ms could be a safe bet too.
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Willetta
2 months ago
I agree, A makes sense for M-LAG.
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Dong
2 months ago
I think it's A) < 50 ms. Sounds fast!
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Kati
2 months ago
Are we sure about that < 50 ms? Sounds a bit optimistic.
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Santos
2 months ago
Totally agree, < 50 ms is a game changer!
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Alverta
2 months ago
Wait, less than 50 ms? That seems too good to be true!
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Francene
3 months ago
I thought it was 1s, but I guess I was wrong.
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Rosendo
3 months ago
It's < 50 ms, pretty impressive!
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Tamera
3 months ago
I feel like the answer is A, but I also remember something about 1 second being a common benchmark in other contexts. It's confusing!
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Leontine
5 months ago
I’m leaning towards option B, less than 400 ms. It seems like a reasonable time for failover, but I can't recall the exact details.
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Edwin
5 months ago
I remember practicing a similar question, and I think the answer was around 1 second. But I could be mixing it up with another topic.
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Anabel
5 months ago
I think the failover time is less than 50 ms, but I'm not entirely sure. It feels like that was mentioned in one of the lectures.
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