2V0-622D · Question #44
An administrator has configured Network I/O Control to support bandwidth allocation to a group of virtual machines running on a vSphere 6.x HA/DRS Cluster. Which two conditions would cause DRS to…
The correct answer is A. The reservation is changed to a value that the initial host can no longer satisfy. B. A physical adapter that carries traffic from the virtual machine is offline. NIOC with DRS triggers VM migrations when network reservations can no longer be satisfied or when a physical adapter carrying VM traffic goes offline.
Question
An administrator has configured Network I/O Control to support bandwidth allocation to a group of virtual machines running on a vSphere 6.x HA/DRS Cluster. Which two conditions would cause DRS to migrate one of these virtual machines to another host in the cluster? (Choose two.)
Options
- AThe reservation is changed to a value that the initial host can no longer satisfy.
- BA physical adapter that carries traffic from the virtual machine is offline.
- CA physical adapter cannot supply the minimum bandwidth in accordance with the teaming policy.
- DA reservation for a VM network adapter is less than the free quota in the network resource pool.
How the community answered
(43 responses)- A70% (30)
- C9% (4)
- D21% (9)
Why each option
NIOC with DRS triggers VM migrations when network reservations can no longer be satisfied or when a physical adapter carrying VM traffic goes offline.
When a VM's network reservation is changed to a value the current host cannot satisfy, DRS detects the reservation violation and migrates the VM to a host with sufficient network resources to fulfill the updated requirement.
If a physical adapter carrying VM traffic goes offline, the host can no longer guarantee the VM's network reservation, so DRS triggers a migration to a host with working adapters that can meet the reservation.
DRS integration with NIOC triggers migrations based on reservation violations, not on teaming policy minimum bandwidth failures, which are handled at the network layer independently of DRS decisions.
A reservation that is less than the free quota in the network resource pool means sufficient bandwidth is already available on the current host, so no migration is needed.
Concept tested: Network I/O Control DRS integration migration triggers
Source: https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.networking.doc/GUID-DCF6BF7E-0B37-4B6B-B5BE-5B0B96A29B50.html
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