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.
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)- A86% (24)
- B4% (1)
- D7% (2)
- E4% (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.
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.
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.
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.
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.
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.
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
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