Discuss HP HPE7-A01 Exam Topic 10 Question 33

For the Aruba CX 6400 switch, what does virtual output queueing (VOQ) implement that is different from most typical campus switches?

Alarge ingress packet buffers

Blarge egress packet buffers

Cper port ASICs

DVSX

Suggested Answer: A

The Aruba CX 6400 switch is a modular switch that supports high-performance and high-density Ethernet switching for campus and data center networks. One of the features that distinguishes the Aruba CX 6400 switch from most typical campus switches is virtual output queueing (VOQ).VOQ is a technique that implements large ingress packet buffers on each port to prevent head-of-line blocking and packet loss due to congestion2.VOQ allows each port to have multiple queues for different output ports and prioritize packets based on their destination and QoS class2.VOQ enables the Aruba CX 6400 switch to achieve high throughput and low latency for various traffic types and scenarios. Reference:2https://www.arubanetworks.com/assets/ds/DS_CX6400Series.pdf

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34 comments · newest first

Patti 11 months ago

Definitely per port ASICs make a difference too!

Gearldine 11 months ago

Surprised to see VOQ implemented like this!

Sheridan 11 months ago

I thought typical switches had egress buffers instead?

Millie 12 months ago

Totally agree, it's a game changer for performance!

Alecia 12 months ago

VOQ uses large ingress packet buffers, right?

Felicitas 12 months ago

I feel like VSX was a separate topic, so I don't think that's the right answer for VOQ.

Naomi 1 year ago

I practiced a question on buffer sizes before, but I can't recall if VOQ specifically mentioned large buffers.

Francis 1 year ago

I think VOQ is more about managing how packets are queued per port, which might tie into the ASICs.

Merrilee 1 year ago

I remember something about VOQ helping with congestion, but I'm not sure if it relates to ingress or egress buffers.

Sheron 1 year ago

Okay, I've got this. VOQ is different from typical campus switches because it uses per-port ASICs to manage the packet buffers. That's the key distinction.

Maryann 1 year ago

I remember learning about VOQ in class. I think it has to do with how the switch handles packet buffering, but I can't recall the specifics.

Frankie 1 year ago

Hmm, virtual output queueing is a new concept for me. I'll have to review my notes on that.

Leonie 1 year ago

I'm not sure about this one. I'll need to think it through carefully.

Meghann 2 years ago

Personally, I'm leaning towards A. Large ingress buffers can absorb traffic bursts and smooth out the flow to the egress ports.

Shayne 2 years ago

↳ replying to Meghann

I agree, large ingress buffers can definitely help with smoothing out traffic flow.

Graciela 2 years ago

↳ replying to Meghann

I think A makes sense, it helps with traffic bursts.

Taryn 2 years ago

I'm not sure, but I think it might be C) per port ASICs.

Veda 2 years ago

I agree with Emerson, VOQ in Aruba CX 6400 switch uses large ingress packet buffers.

Margart 2 years ago

Hold up, is this a trick question? Virtual output queueing sounds like something from the future, not a typical campus switch!

Penney 2 years ago

Hmm, I'm going with D. VSX is a feature that allows two switches to act as one, so it could be related to virtual output queueing.

Precious 2 years ago

↳ replying to Penney

I agree with you, D) VSX sounds like it could be related to virtual output queueing.

Aleta 2 years ago

↳ replying to Penney

I'm leaning towards C) per port ASICs.

Maybelle 2 years ago

↳ replying to Penney

I think A) large ingress packet buffers is the correct answer.

Florinda 2 years ago

I think it's got to be C. Per port ASICs help scale the switch and handle more concurrent traffic flows.

Matthew 2 years ago

↳ replying to Florinda

D) VSX

Burma 2 years ago

↳ replying to Florinda

C) per port ASICs

Eura 2 years ago

↳ replying to Florinda

B) large egress packet buffers

Daren 2 years ago

↳ replying to Florinda

A) large ingress packet buffers

Emerson 2 years ago

I think the answer is A) large ingress packet buffers.

Geraldine 2 years ago

Option B sounds right. Large egress buffers help handle congestion and avoid packet drops.

Ariel 2 years ago

↳ replying to Geraldine

C) per port ASICs

Louvenia 2 years ago

↳ replying to Geraldine

Option B sounds right. Large egress buffers help handle congestion and avoid packet drops.

Cassie 2 years ago

↳ replying to Geraldine

B) large egress packet buffers

Latanya 2 years ago

↳ replying to Geraldine

A) large ingress packet buffers

HPE7-A01 Exam - Topic 10 Question 33 Discussion