VMware and Windows Interview Questions: Part 3

  1. What is vSAN?
    • It is a hypervisor-converged storage solution built by aggregating the local storage attached to the ESXi hosts managed by a vCenter. 
  2. Recommended iSCSI configuration?
    • A separate vSwitch, and a separate network other than VMtraffic network for iSCSI traffic. Dedicated physical NICs should be connected to vSwitch configured for iSCSI traffic.
  3. What is iSCSI port binding ?
    • Port binding is used in iSCSI when multiple VMkernel ports for iSCSI reside in the same broadcast domain and IP subnet, to allow multiple paths to an iSCSI array that broadcasts a single IP address.
  4. iSCSI port binding considerations ?
    • Array Target iSCSI ports must reside in the same broadcast domain and IP subnet as the VMkernel port.
    • All VMkernel ports used for iSCSI connectivity must reside in the same broadcast domain and IP subnet.
    • All VMkernel ports used for iSCSI connectivity must reside in the same vSwitch.
    • Currently, port binding does not support network routing.
  5. Recommended iSCSI configuration of a 6 NIC infrastructure ? (Answer changes as per the infrastructure requirements)
    • 2 NICs for VM traffic
    • 2 NICs for iSCSI traffic
    • 1 NIC for vMotion
    • 1 NIC for management network
  6. Post conversion steps in P2V
    • Adjust the virtual hardware settings as required
    • Remove non present device drivers
    • Remove all unnecessary devices such as serial ports, USB controllers, floppy drives etc..
    • Install VMware tools
  7. Which esxtop metric will you use to confirm latency issue of storage ?
    • esxtop --> d --> DAVG
  8. What are standby NICs
    • These adapters will only become Active if the defined Active adapters have failed.
  9. Path selection policies in ESXi
    1. Most Recently Used (MRU)
    2. Fixed
    3. Round Robin
  10. Which networking features are recommended while using iSCSI traffic
    • iSCSI port binding
    • Jumbo Frames

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