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NS0-157 · Question #149

What three statements are true about LIF failover? (Choose three.)

The correct answer is A. A data Ethernet LIF fails over when the cluster is in quorum. D. A data Ethernet LIF will not revert back by default to its home port. F. A node management Ethernet LIF will never automatically revert back to its home port. This question tests knowledge of automatic failover triggers and auto-revert defaults for different LIF types in ONTAP.

Network Configuration and Data Access

Question

What three statements are true about LIF failover? (Choose three.)

Options

  • AA data Ethernet LIF fails over when the cluster is in quorum.
  • BA cluster management Ethernet LIF fails over when a port is down.
  • CA cluster management Ethernet LIF will never automatically revert back to its home port.
  • DA data Ethernet LIF will not revert back by default to its home port.
  • EA node management Ethernet LIF fails over when a port is down.
  • FA node management Ethernet LIF will never automatically revert back to its home port.

How the community answered

(49 responses)
  • A
    82% (40)
  • B
    6% (3)
  • C
    2% (1)
  • E
    10% (5)

Why each option

This question tests knowledge of automatic failover triggers and auto-revert defaults for different LIF types in ONTAP.

AA data Ethernet LIF fails over when the cluster is in quorum.Correct

Data Ethernet LIFs are configured with automatic failover enabled by default and will fail over to another port when a link failure occurs, but this behavior requires the cluster to be in quorum - quorum is a prerequisite for data LIF automatic failover to proceed.

BA cluster management Ethernet LIF fails over when a port is down.

Cluster management Ethernet LIFs do not automatically fail over when a port goes down; they require manual migration by an administrator.

CA cluster management Ethernet LIF will never automatically revert back to its home port.

Cluster management LIFs have auto-revert enabled by default, meaning they will automatically return to their home port once it is restored - making the claim that they 'never' automatically revert factually incorrect.

DA data Ethernet LIF will not revert back by default to its home port.Correct

In ONTAP, data Ethernet LIFs have the auto-revert parameter set to false by default, meaning after a failover event the LIF remains on the failover port and does not automatically return to its home port even after the home port recovers.

EA node management Ethernet LIF fails over when a port is down.

Node management Ethernet LIFs do not trigger automatic failover when a port goes down; like cluster management LIFs, they require manual intervention for migration.

FA node management Ethernet LIF will never automatically revert back to its home port.Correct

Node management LIFs also have auto-revert set to false by default, so once a node management LIF fails over to another port it will never automatically revert to its original home port without administrator intervention.

Concept tested: ONTAP LIF failover triggers and auto-revert defaults

Source: https://docs.netapp.com/us-en/ontap/networking/lif_failover_and_giveback.html

Topics

#LIF failover#cluster management LIF#data LIF#automatic revert

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