Which functionality enables a host subsystem to have multiple paths to a NetApp ONTAP NVMe...

Asymmetric Namespace Access (ANA) is the NVMe mechanism used by ONTAP to provide multipath access to NVMe namespaces. NetApp documents that NVMe hosts use ANA for multipath high availability, whereas conventional FCP and iSCSI hosts use Asymmetric Logical Unit Access (ALUA). ANA enables the NVMe host to understand the accessibility and optimization state of each path to a namespace and select an appropriate path during normal operation or failover. An NQN is an NVMe Qualified Name used to identify hosts, subsystems, and controllers; it does not provide multipath functionality. IQN is associated with iSCSI, while ALUA applies to SCSI-based SAN protocols. Therefore, ANA is specifically responsible for NVMe namespace multipathing in ONTAP environments. Relevant SAN ONTAP topics include NVMe-oF, ANA, namespace access, host multipathing, and HA path management.