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.
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)- A10% (2)
- B85% (17)
- C5% (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.
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.
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.
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.
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.
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
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