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HPE7-A03 Exam - Topic 1 Question 33 Discussion

What is the best practice for using VSX at the core of a 3-tier design?
B) You should implement VSX at the core when the aggregation layer is layer 3 only with OSPF-routed traffic forwarding Between the core and aggregation layers.
A) You should never implement VSX at the core of a 3-tier redundancy core.
C) You should Implement VSX at the core when the aggregation layer operates at layer 2 only.
D) VSX-lags allow the collapsed core to connect directly to services such as gateways and services only so long as spanning tree is used to prevent loops.

HPE7-A03 Exam - Topic 1 Question 33 Discussion

Actual exam question for HP's HPE7-A03 exam
Question #: 33
Topic #: 1
[All HPE7-A03 Questions]

What is the best practice for using VSX at the core of a 3-tier design?

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Suggested Answer: B

In a 3-tier network design consisting of core, aggregation, and access layers, the implementation of Virtual Switching Extension (VSX) at the core is considered a best practice when the aggregation layer functions primarily at Layer 3 with routing protocols like OSPF facilitating traffic forwarding between the core and aggregation layers. This design choice, as verified by Aruba Campus Access documents, leverages the high availability and redundancy features of VSX technology while maintaining efficient and scalable routing at the aggregation layer. Implementing VSX at the core in such a scenario ensures seamless failover and redundancy, minimizing the risk of downtime and ensuring consistent performance across the network. The core layer, equipped with VSX, provides a robust and resilient backbone for the network, facilitating efficient traffic management and routing decisions, which is critical for large-scale enterprise networks.


by Leota at Jun 15, 2025, 09:30 AM

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Henriette
6 months ago
VSX-lags are a game changer for connecting services directly!
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Herminia
6 months ago
I think option A makes sense; VSX shouldn't be at the core.
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Mary
6 months ago
Wait, can you really use VSX with layer 2 only? Sounds risky.
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Rolf
6 months ago
I've read that VSX is great for redundancy in 3-tier designs.
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Dalene
6 months ago
Totally agree, especially with layer 3 aggregation!
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Hyman
7 months ago
I vaguely recall something about VSX-lags and spanning tree, but I'm not confident if that applies here or if it's more about redundancy.
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Garry
7 months ago
I feel like I read that VSX is better suited for layer 2 scenarios, which might make option C the right choice?
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Tomoko
7 months ago
I think option B sounds familiar from our practice questions, especially regarding OSPF and layer 3.
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Ling
7 months ago
I remember something about not using VSX at the core, but I'm not sure if that's absolute or just a guideline.
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Matthew
7 months ago
The best strategy is to carefully read through each option and think about the implications for the core layer and how VSX would fit in. Eliminating the clearly wrong answers first can help narrow it down.
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Madelyn
8 months ago
I'm a bit confused by the wording of the options. Can VSX really be used in a 3-tier redundancy core? I'm not sure I fully understand the context here.
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Josphine
8 months ago
I've got a good feeling about this one. The answer is definitely C - you should implement VSX at the core when the aggregation layer operates at layer 2 only.
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Marylou
8 months ago
Okay, let me see if I can break this down. The key seems to be understanding the layer 2 vs layer 3 behavior in the aggregation layer and how that impacts the use of VSX at the core.
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Mira
8 months ago
Hmm, this question seems a bit tricky. I'll need to think carefully about the different 3-tier design scenarios and how VSX could be used in each one.
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Natalie
11 months ago
As a network engineer, I live for these kinds of 3-tier design questions. Time to put my VSX knowledge to the test!
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Maryann
11 months ago
Option D is an interesting one, but I'm not sure about the spanning tree requirement. Wouldn't VSX-lags make spanning tree unnecessary? Hmm, tough call.
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Teddy
10 months ago
User 3: I think we should consider all options before making a decision.
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Jani
10 months ago
User 2: I agree, it's a tough call. Maybe there's a way around it.
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Pamella
11 months ago
User 1: Option D is interesting, but I think spanning tree is still needed for VSX-lags.
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Ammie
11 months ago
Haha, option A is a classic 'never do this' answer. I'm pretty sure the correct answer has to be one of the other options that actually recommends using VSX in a 3-tier design.
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Ollie
11 months ago
I'd have to go with option B. Using VSX at the core with OSPF-routed traffic between the core and aggregation layers seems like a solid way to implement the 3-tier design.
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Amber
10 months ago
D) VSX-lags allow the collapsed core to connect directly to services such as gateways and services only so long as spanning tree is used to prevent loops.
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Reena
10 months ago
C) You should Implement VSX at the core when the aggregation layer operates at layer 2 only.
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Alecia
10 months ago
B) You should implement VSX at the core when the aggregation layer is layer 3 only with OSPF-routed traffic forwarding Between the core and aggregation layers.
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Tomoko
11 months ago
I think VSX-lags allow the collapsed core to connect directly to services, as long as spanning tree is used to prevent loops.
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Jame
12 months ago
I disagree, I believe VSX should be implemented at the core when the aggregation layer operates at layer 2 only.
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Vincent
12 months ago
Option C makes the most sense to me. Implementing VSX at the core when the aggregation layer is layer 2 only seems like the best approach to maintain redundancy and avoid issues.
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Lili
11 months ago
I agree, implementing VSX at the core when the aggregation layer is layer 2 only seems like a good approach.
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Janessa
11 months ago
Option C makes sense because it helps maintain redundancy and avoid issues.
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Valentin
12 months ago
I think the best practice is to implement VSX at the core when the aggregation layer is layer 3 with OSPF-routed traffic forwarding.
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