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NS0-157 · Question #142

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

The correct answer is A. A node management Ethernet LIF will never automatically revert back to its home port. C. A data Ethernet LIF will not automatically revert back to its home port. F. A data Ethernet LIF can fail over when the cluster is in quorum. ONTAP LIF failover and auto-revert behavior differ by LIF type; understanding which LIF types auto-revert and which can fail over to partner nodes is essential for network availability planning.

Network Configuration and Data Access

Question

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

Options

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

How the community answered

(28 responses)
  • A
    86% (24)
  • B
    4% (1)
  • D
    7% (2)
  • E
    4% (1)

Why each option

ONTAP LIF failover and auto-revert behavior differ by LIF type; understanding which LIF types auto-revert and which can fail over to partner nodes is essential for network availability planning.

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

Node management LIFs have auto-revert set to false by default, meaning they will remain on the failover port and never automatically return to their home port after a link failure is resolved.

BA node management Ethernet LIF can fail over to its partner node when a port is down.

Node management LIFs use a 'local-only' or equivalent failover policy restricting them to ports on the same node; they cannot fail over to a partner node.

CA data Ethernet LIF will not automatically revert back to its home port.Correct

Data Ethernet LIFs also have auto-revert disabled by default in many ONTAP configurations, so they do not automatically return to the home port once they have failed over.

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

Cluster management LIFs do support auto-revert back to their home port when it becomes available, so the statement that they 'will never' auto-revert is false.

EA cluster management Ethernet LIF can fail over when a port is down.

Cluster management LIF failover behavior is constrained by its failover policy and does not simply trigger on any port-down event the same way data LIFs do, making this statement inaccurate as written.

FA data Ethernet LIF can fail over when the cluster is in quorum.Correct

A data Ethernet LIF can perform a failover when the cluster is in quorum because quorum is required for data serving operations; without quorum the LIF cannot safely move to serve data.

Concept tested: ONTAP LIF failover policies and auto-revert behavior

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

Topics

#LIF failover#node management LIF#data LIF#automatic revert

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