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NS0-157 · Question #368

Which logical interfaces have failover and online migration capabilities in a different node? (choose all that apply)

The correct answer is B. Cluster management D. Data (CIFS, NFS). Only NAS data LIFs (CIFS/NFS) and cluster-management LIFs support failover and live migration to ports on a different node; SAN and cluster-internal LIFs do not.

Network Configuration and Data Access

Question

Which logical interfaces have failover and online migration capabilities in a different node? (choose all that apply)

Options

  • ACluster
  • BCluster management
  • CData (FC, iSCSI)
  • DData (CIFS, NFS)
  • ENode-management

How the community answered

(20 responses)
  • A
    10% (2)
  • B
    85% (17)
  • C
    5% (1)

Why each option

Only NAS data LIFs (CIFS/NFS) and cluster-management LIFs support failover and live migration to ports on a different node; SAN and cluster-internal LIFs do not.

ACluster

Cluster LIFs are bound to specific cluster interconnect ports on their local node and have a failover policy of disabled, so they cannot be migrated or failed over to a different node.

BCluster managementCorrect

The cluster-management LIF is implemented as a data-style LIF and can be failed over or migrated to any available port on any node in the cluster to maintain uninterrupted administrative access. It is not tied to a single node and its failover policy allows it to traverse node boundaries.

CData (FC, iSCSI)

FC and iSCSI block protocols rely on host-side multipathing software (MPIO or DM-MPIO) for path redundancy; their LIFs do not support failover or migration across nodes because the protocol sessions are bound to the initiator-target path.

DData (CIFS, NFS)Correct

NAS data LIFs using CIFS or NFS protocols support automatic failover and non-disruptive online migration to ports on other nodes because these protocols can transparently resume sessions after a brief interruption. The stateless nature of NFS and SMB reconnect behavior makes cross-node LIF movement feasible without data loss.

ENode-management

Node-management LIFs use a local-only failover policy that restricts them to ports on their own node, preventing migration or failover to a different node.

Concept tested: LIF failover and cross-node migration by protocol type

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

Topics

#LIF failover#LIF migration#data LIF#cluster management LIF

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