HPE7-A03 Exam - Topic 2 Question 20 Discussion

Actual exam question for HP's HPE7-A03 exam

Question #: 20
Topic #: 2

You are delivering a replacement collapsed core network proposal to the customer where the core switches will have the switched virtual interlaces (SVl) configured. The customer is not sure that a USX pair of switches will Be able to act as I tie spanning tree root in their environment.

Which options are true about spanning tiee and VSX that will help assure the customer that a VSX pair of switches are appropriate for a collapsed core? (Select two.)

AThe primary vsx switch ts the spanning tree root and the default behavior is the links on the secondary vsx switch are blocked with sub-millisecond failover assured by vsx active-gateway.

BWhen LAG interfaces are configured on a VSX pair of switches, both switches are 'operational primary' and ensure active-active LAG operation equally.

CBoth VSX switches are configured with the system MAC and then create unique STP bridge-IDs to identify 'operational primary' and 'operational secondary' for proper STP functioning

DAruba VSX switches support either multiple spanning tree (MSTP) or rapid per VLAN spanning tree (RPVST).

EThe ISL between VSX switches is never part of STP domain and doesn't send or receive BPDUs on this link and this ensures the 'operational primary' and 'operational secondary' switches are deterministic to other dual-attached switches.

Show Suggested Answer

Suggested Answer: D, E

According to Aruba Campus Access documents and learning resources, Aruba VSX (Virtual Switching Extension) technology is designed to provide advanced high availability and redundancy features for campus networks. Specifically, answer D is correct because Aruba VSX supports both Multiple Spanning Tree Protocol (MSTP) and Rapid Per VLAN Spanning Tree (RPVST), ensuring efficient tree structures for VLANs and rapid convergence in case of topology changes. Answer E is also true as the Inter-Switch Link (ISL) used for the VSX pair is not part of the Spanning Tree Protocol (STP) domain, meaning it does not send or receive Bridge Protocol Data Units (BPDUs). This design prevents the ISL from influencing STP calculations, ensuring that the operational roles of the primary and secondary switches in the VSX pair are clear and predictable to the rest of the network. This separation helps maintain deterministic behavior and failover capabilities in the network, aligning with the goals of a collapsed core network design.

by Suzan at Sep 15, 2024, 08:05 AM

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Josphine

4 months ago

The ISL not being part of the STP domain is a game changer!

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Jesse

4 months ago

I think option D is key for flexibility with STP.

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Nu

4 months ago

Wait, are you sure about the MAC and STP bridge-IDs? Sounds complicated.

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Luann

5 months ago

Totally agree, the failover is super quick!

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Lashawna

5 months ago

A VSX pair can definitely act as a spanning tree root.

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Laura

5 months ago

I recall that the ISL between VSX switches doesn't participate in the STP domain, which helps with stability, but I’m not clear on how that impacts the overall network design.

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Harrison

5 months ago

I practiced a similar question where we talked about LAG interfaces in VSX pairs. I believe both switches being 'operational primary' is crucial for load balancing.

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Reuben

5 months ago

I think option C sounds familiar because we discussed how the unique STP bridge-IDs help with proper functioning, but I’m not confident about the details.

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Tish

5 months ago

I remember that the primary VSX switch typically acts as the spanning tree root, but I'm not entirely sure how the failover works with the secondary switch.

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Blondell

5 months ago

I'm pretty confident I know the right answers here. VSX provides active-active redundancy, and the primary switch acts as the spanning tree root while the secondary's links are blocked. Plus, VSX supports both MSTP and RPVST.

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Dyan

5 months ago

I think the key is understanding how VSX switches coordinate spanning tree to ensure a deterministic root bridge and avoid issues like loops. The options about the ISL and unique bridge IDs seem important.

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Avery

5 months ago

Okay, let's see. The question is asking about how VSX switches handle spanning tree, so I'll focus on that. The options mention things like primary/secondary, active-active LAGs, and MSTP/RPVST support.

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Aja

6 months ago

This question seems straightforward, but I want to make sure I understand the key points about VSX and spanning tree before selecting the answers.

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Lorrie

6 months ago

Hmm, I'm a bit unsure about the details on how VSX handles spanning tree. I'll need to review the VSX configuration and spanning tree concepts to make sure I select the right options.

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Ernie

6 months ago

Okay, let's see. I think the external audit would be the most reliable since it's coming from an independent third party. The internal audit might be biased, and the vendor scorecard and regulatory exam could be more limited in scope. I'll go with external audit for this one.

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Weldon

1 year ago

D is also a good option. The VSX switches support both MSTP and RPVST, so they should be able to handle the customer's STP requirements.

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Devorah

1 year ago

Haha, I bet the customer is wondering if the VSX switches will be able to handle their core network without a 'core' meltdown!

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Kaycee

1 year ago

I'm not sure about B, since I thought the LAG operation was active-active, not both switches being 'operational primary'.

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Izetta

1 year ago

C) Both VSX switches are configured with the system MAC and then create unique STP bridge-IDs to identify 'operational primary' and 'operational secondary' for proper STP functioning.

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Corrinne

1 year ago

A) The primary vsx switch ts the spanning tree root and the default behavior is the links on the secondary vsx switch are blocked with sub-millisecond failover assured by vsx active-gateway.

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Christiane

1 year ago

A and E seem like the right choices here. The primary VSX switch acts as the STP root, and the ISL between the VSX switches is not part of the STP domain, so the failover should be seamless.

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Josefa

1 year ago

A) Definitely, with the primary VSX switch as the STP root and the ISL not part of the STP domain, the failover should be seamless.

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Jacquelyne

1 year ago

Customer: That makes sense. It seems like the VSX pair of switches will work well for our collapsed core network.

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Kandis

1 year ago

E) The ISL between VSX switches is never part of STP domain and doesn't send or receive BPDUs on this link, ensuring the 'operational primary' and 'operational secondary' switches are deterministic to other dual-attached switches.

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Sherrell

1 year ago

A) The primary VSX switch is the spanning tree root and the default behavior is the links on the secondary VSX switch are blocked with sub-millisecond failover assured by VSX active-gateway.

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