An administrator wants to ensure that any virtual machine added to a certain port group always has sufficient
network resources. Network I/O Control version 3 has been enabled on the Distributed Switch.
Which three steps will achieve this objective? (Choose three.)
A.
Reserve bandwidth for virtual machine system traffic on the Distributed Switch Port Group.
B.
Edit the virtual machine’s Resource settings and set a reservation for virtual machine system traffic.
C.
Create a Network Resource Pool on the Distributed Switch and set a reservation quota.
D.
Reserve bandwidth for virtual machine system traffic on the Distributed Switch.
E.
Add the Network Resource Pool on the Distributed Switch Port Group.
C,d,e
http://www.virten.net/2015/09/vcp6-delta-part-7-network-enhancements/
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Network I/O Control allocates bandwidth for virtual machines by using two models:
– Allocation across the entire vSphere Distributed Switch based on network resource pools
– Aallocation on the physical adapter that carries the traffic of a virtual machine.
The bandwidth quota that is dedicated to a network resource pool is shared among the distributed port groups associated with the pool. A virtual machine receives bandwidth from the pool through the distributed port group the VM is connected to.
By default, distributed port groups on the switch are assigned to a network resource pool, called default, whose quota is not configured.
Network I/O Control version 3 provisions bandwidth to a virtual machine according to shares, reservation, and limits that are defined for a network adapter in the VM hardware settings.
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.networking.doc/GUID-8E957535-7969-4E12-BD11-DF746D6D5379.html
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CDE is correct.
BW is reserved on the vDS level for a NW RP. DGs get allocation based on their assigned shares of the RP. VMs get the BW from the RP.
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Actually, C – E – B is correct.
Create a Network Resource Pool – Create network resource pools on a vSphere Distributed Switch to reserve bandwidth for a set of virtual machines.
Add a Distributed Port Group to a Network Resource Pool – Add a distributed port group to a network resource pool so that you can allocate bandwidth to the virtual machines that are connected to the port group.
Configure Bandwidth Allocation for a Virtual Machine – You can configure bandwidth allocation to individual virtual machines that are connected to a distributed port group. You can use shares, reservation, and limit settings for bandwidth.
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.networking.doc/GUID-29A96AB2-AEBF-420E-BDD6-48921CD687FF.html
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… that any virtual machine !!!
B Makes no sense, because you have to configure it in every VM. Instead, D ensures that bandwidth is reserved for all the VMs traffic.
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Correct: CDE
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why not A C and E ?
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CDE – you reserve bandwidth on the dvSwitch, not the Port Group directly. To perform this on the port group, you need to have created a network resource pool as per C and E.
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This is one of the semantics type of questions… If the emphasis is on where network resource pools can be created (at the DVS level and not on the dPortGroup), then A and E are off.
Even if ‘A’ implies associating dPortGroup (dpg) with the predefined system resource pool (RP) for VM traffic, it’s not the choice available via vSphere Client GUI which offers only Default RP or custom-defined RPs.
‘B’ is not suitable either as the question asks about a scalable solution that would “ensure that any virtual machine added to a certain port group…”, i.e. setting reservations individually for each VM is not practical under this context.
That leaves only C and D as correct answers.
Now, having to choose what would be the least incorrect of the remaining options, ‘E’ is the one to pick, especially if by adding an RP to dPG they mean association of dPG with a network pool previously defined on the DVS level.
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