Which two VMware features must be turned off in the data center cluster for Cisco VM-FEX universal passthrough to operate?

Which two VMware features must be turned off in the data center cluster for Cisco VM-FEX
universal passthrough to operate? (Choose two.)

Which two VMware features must be turned off in the data center cluster for Cisco VM-FEX
universal passthrough to operate? (Choose two.)

A.
VMCI

B.
DRS

C.
FT

D.
HA

E.
vMotion

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Michael Churchill

Michael Churchill

First off it may help if we had a better idea of what each of the above was and how it fits into VMWARE

The Virtual Machine Communication Interface (VMCI) is an infrastructure that provides fast and efficient communication between a virtual machine and the host operating system and between two or more virtual machines on the same host

VMware® Distributed Resource Scheduler (DRS) aggregates computing capacity across a
collection of servers into logical resource pools and intelligently allocates available resources among the virtual machines based on pre-defined rules

Fault Tolerance (FT) provides continuous availability for applications in the event of server failures

VMware HA (High Availability) is a utility that eliminates the need for dedicated standby hardware and software in a virtualized environment

VMware® VMotion™ enables the live migration of running virtual machines from one physical server to another with zero downtime, continuous service availability, and complete transaction integrity

Now most of us know this but I hate abbreviations in questions as there can always be some confusion between technologies and disciplines

So what can you use

Normally when using DirectPath I/O there are some major drawbacks in the fact that you loose a lot of functionality, such as vMotion, HA, DRS, Snapshots & suspend/resume. This is not the case with DirectPath I/O with VM-FEX. This is because a VM can switch from High-Performance mode back to Standard mode when it needs to perform a feature where DirectPath I/O is not support, say like a vMotion.

Cisco Unified Computing Systems (UCS) through Cisco Virtual Machine Fabric Extender (VM-FEX) distributed switches support the following features for migration and resource management of virtual machines which use DirectPath I/O:

vMotion
Hot adding and removing of virtual devices
Suspend and resume
High availability
DRS
Snapshots

So if it support these then the answer must be A and C

see
http://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.networking.doc%2FGUID-BF2770C3-39ED-4BC5-A8EF-77D55EFE924C.html

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