HPE7-A04 Exam - Topic 2 Question 16 Discussion

Actual exam question for HP's HPE7-A04 exam

Question #: 16
Topic #: 2

You are involved in a 2-Tier L2 Data Center Design with the following details:

* CX 8325 100G Core Switches

* CX 10000 48-P 25G Access Switches

* 100G SR4 Optical connections between Core and Access

In this design, both the Core Layer and Access Layer consist of pairs of switches configured in VSX for H

ACore Switches = VSX Pairs of CX 8325 32-port 100G switches (B-F airflow) Each pair uses:
* 2 x 100G QSFP28 1M DACs for ISL
* 1 x 100G QSFP28 1M DAC for Keepalive
* 2 x 100G QSFP28 SR4 Optic to each access switch Each Core switch has 13 available 100G QSFP28 interfaces.
What is the maximum number of racks supported by this design?

ASolution can scale to 7 total racks using the same subscription rates.

BSolution can scale to 14 total racks using the same subscription rates.

CSolution can scale to 8 total racks using varying subscription rates.

DSolution can scale to 16 total racks using the same subscription rates.

Show Suggested Answer

Suggested Answer: A, A

by Cora at Jun 10, 2025, 12:24 PM

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Barbra

2 months ago

Wait, how do we get to 16? That’s surprising!

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Olen

2 months ago

Totally agree, 8 racks sounds more realistic.

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Casie

2 months ago

I think it can actually support 14 racks.

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Rozella

3 months ago

16 racks? That seems a bit high, doesn't it?

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Blair

3 months ago

The CX 8325 has 13 available 100G ports.

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Winfred

3 months ago

I’m leaning towards 16 racks because it seems like we have enough interfaces available, but I need to double-check the math on that.

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Leah

3 months ago

I vaguely recall that each Core switch has a limited number of interfaces for connections. Maybe we can only support 8 racks with the current setup?

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Luisa

4 months ago

I think we practiced a similar question where we had to determine rack capacity based on switch ports. I feel like the answer might be around 14 racks, but I could be mixing it up.

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Avery

4 months ago

I remember something about calculating the number of racks based on the available interfaces, but I'm not entirely sure how to apply that here.

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Thomasena

4 months ago

This seems straightforward enough. I'll just need to do some simple math to determine the maximum number of racks based on the information provided. As long as I don't miss any key details, I think I can nail this question.

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Carmelina

4 months ago

I'm a bit confused by all the technical details in this question. I'll need to re-read it a few times and make sure I understand the core and access switch configuration before I can even begin to solve this.

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Lina

4 months ago

Alright, I've got a strategy here. I'll start by looking at the number of 100G connections available from the core switches, then factor in the connections needed for the access switches and see what the maximum supported rack count is.

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Lashawn

5 months ago

Okay, let me see if I can break this down step-by-step. The core switches have 13 available 100G QSFP28 interfaces each, and each access switch connects to both core switches. I think I can work this out.

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Benton

5 months ago

Hmm, this looks like a tricky one. I'll need to carefully go through the details and do some calculations to figure out the maximum number of racks supported.

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