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Cisco Exam 300-610 Topic 5 Question 79 Discussion

Actual exam question for Cisco's 300-610 exam
Question #: 79
Topic #: 5
[All 300-610 Questions]

An engineer must design the compute portion of a data center environment. The environment includes:

* direct-attach Fibre Channel storage array with four 32 G Fibre Channel ports per controller

* Cisco UCS B-series servers equipped with Cisco UCS IOM 2408 Fabric Extenders

* Cisco 6454 Fabric Interconnects

The fabric interconnects conned to the LAN via 100G ports, the SAN via 32 G Fibre Channel ports, and the IOM 2408 via 10 G ports. Which storage connectivity strategy must the engineer choose?

Show Suggested Answer Hide Answer
Suggested Answer: D

When restrictions on oversubscription ratios are disabled, the bandwidth allocation among the shared ports is proportionate to the configured speed. (If the configured speed is auto, then bandwidth is allocated assuming a speed of 4 Gbps.) For example, if you have three shared ports configured at 1, 2, and 4 Gbps, then the allocated bandwidth ratio is 1:2:4. In Cisco SAN-OS Release 3.0 and later (or when restrictions on oversubscription ratios are enabled), port bandwidths are allocated in equal proportions, regardless of port speed, so, the bandwidth allocation for the same three ports mentioned in the example would be 1:1:1.

Contribute your Thoughts:

I'm just hoping the exam doesn't ask me to calculate the total port count or something. That would be like asking a chef to solve differential equations.
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Lisandra
6 days ago
Option D seems a bit odd with the 'back-to-back' PortChannel. I'm not sure I've seen that configuration before, but it could be an interesting way to approach the problem.
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Lavelle
11 days ago
I'm not sure, but option B also looks like a good choice with the four-poll Port Channel from each IOM to each fabric interconnect.
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Corrina
12 days ago
I agree with Lai. Option A seems like the most reliable choice for the storage connectivity strategy.
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Lai
13 days ago
I think the engineer should choose option A because it provides redundancy and load balancing.
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Elsa
14 days ago
Haha, what is this, a Cisco networking exam? I bet the right answer is whatever maximizes the number of ports and PortChannels. More is always better, right?
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Frederica
15 days ago
Why do you think option B is better?
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Elizabeth
17 days ago
I disagree, I believe option B is the best choice.
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Brandon
21 days ago
I'm a little skeptical about the four-port SAN-PortChannel in Option B. Wouldn't that be overkill for a direct-attach Fibre Channel storage array?
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Delbert
22 days ago
Option B looks like the most comprehensive solution, providing redundancy and high-bandwidth connectivity for both the UCS and storage infrastructure.
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Frederica
22 days ago
I think the engineer should choose option A.
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