200-150 Question #199: Real Exam Question with Answer & Explanation

The correct answer is C: to segment the physical fabric into multiple logical fabrics. VSANs (Virtual SANs) are implemented primarily to partition a single physical Fibre Channel fabric into multiple isolated logical fabrics.

Question

For witch reason would you implement a VSAN?

Options

Ato overcome the limitation of zoing
Bto virtualize storage
Cto segment the physical fabric into multiple logical fabrics
Dto overcome the limitations of LUN masking

Explanation

VSANs (Virtual SANs) are implemented primarily to partition a single physical Fibre Channel fabric into multiple isolated logical fabrics.

Common mistakes.

A. Zoning is an independent mechanism within a fabric for controlling device-to-device access; VSANs and zoning work together but VSANs do not overcome zoning limitations.
B. Virtualizing storage - abstracting physical disks into logical pools - is performed by storage virtualization appliances or software, not by VSANs which operate at the fabric layer.
D. LUN masking is a storage controller-level access control mechanism that restricts which hosts see which LUNs; it is entirely separate from fabric segmentation provided by VSANs.

Concept tested. VSAN purpose and fabric segmentation

Reference. https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/8_x/config/san_features/cisco_mds9000_san_features_config_guide_8x/configuring_vsans.html

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