200-150 · Question #199
For witch reason would you implement a VSAN?
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
How the community answered
(60 responses)- A5% (3)
- B2% (1)
- C90% (54)
- D3% (2)
Why each option
VSANs (Virtual SANs) are implemented primarily to partition a single physical Fibre Channel fabric into multiple isolated logical fabrics.
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.
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.
A VSAN creates separate logical fabric instances on shared physical infrastructure, each with its own isolated name server, zone set, and fabric services. This provides traffic isolation, security boundaries, and independent management without requiring separate physical SAN hardware.
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
Source: 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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