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When using FCP, what is the minimum number of FC switches needed to redundantly attach three ESXi hosts?
Answer : C
When using Fibre Channel Protocol (FCP), the minimum number of FC switches needed to redundantly attach three ESXi hosts is 2. This setup ensures that each host has multiple paths to the storage, providing high availability and fault tolerance. Each ESXi host should be connected to both switches, allowing for continuous operation even if one switch fails.
For more information, refer to:
NetApp Documentation on FC Switch Configurations
NetApp Community Discussion on Redundant FC Setup
A customer uses several node types in their SAN environment. They want to migrate iSCSI LIFs without disruption.
Which command can achieve this?
Answer : D
ONTAP supports iSCSI LIF migration between nodes specifically on All-Flash SAN Array (ASA) platforms running ONTAP 9.11.1 or later. The migration is restricted to ports on the LIF's home node or its HA partner, and the applicable CLI operation is network interface migrate. Standard AFF and FAS configurations do not provide the same cross-node iSCSI LIF migration capability described in this scenario. For those systems, an iSCSI LIF normally must be created on the required destination node rather than migrated between nodes. The ucadmin modify command changes unified adapter personality and is unrelated to LIF migration. Therefore, option D correctly combines the supported ASA platform with the appropriate ONTAP command. Relevant topics include ASA SAN networking, iSCSI LIF mobility, HA partners, LIF migration, and nondisruptive SAN operations.
What are two possible options for iSCSI authentication methods? (Choose two.)
Answer : A, C
ONTAP defines the supported iSCSI authentication types as CHAP, deny, and none. Therefore, among the options provided, CHAP and deny are the two valid choices. CHAP authenticates an initiator by using a username and password. ONTAP supports inbound CHAP, where the storage system authenticates the initiator, and optional outbound CHAP for mutual authentication. The deny authentication type explicitly prevents the specified initiator from accessing the SVM. Certificates and SAML are not available values for ONTAP iSCSI initiator authentication. The vserver iscsi security create command exposes the authentication type as {CHAP|deny|none}. Consequently, the V9.02 supplied answer A, B is incorrect and has been corrected to A, C. Relevant topics include iSCSI security, CHAP, mutual CHAP, initiator credentials, and authentication policies.
An administrator connects to a LUN from Node A to a host in a redundant pathing configuration.
How does the administrator show that the LUN delivers data if a node disruption occurs?
Answer : C
A controlled storage takeover and giveback is the appropriate method for validating HA behavior without deliberately creating uncontrolled infrastructure failures. NetApp recommends testing an HA pair after configuration to verify uninterrupted access to storage during takeover and giveback. During takeover, the surviving HA partner assumes responsibility for the affected node's storage and continues serving its data. Host multipathing redirects SAN I/O through surviving paths. Giveback subsequently returns storage ownership and processing to the home node. Pulling cluster-interconnect cables, removing rack power, or disabling backend connectivity introduces unnecessary failure conditions and can affect more infrastructure than required for a controlled validation. Therefore, performing takeover and giveback on the nodes verifies both storage-controller failover and the host's redundant SAN path configuration.
After a storage administrator creates a LUN using the CLI, the LUN does not appear on the corresponding host.
What should be done to correct this issue?
Answer : B
A LUN created with the ONTAP CLI is not automatically visible to a host merely because the storage object exists. For FCP or iSCSI access, ONTAP must associate the LUN with an initiator group by creating a LUN mapping. NetApp's SAN provisioning workflow explicitly creates the LUN, creates or identifies the igroup containing the host initiators, and then maps the LUN to that igroup. The mapping assigns host access and a LUN ID that the initiator uses to discover the device. Bringing the LUN online does not grant host access, mounting a volume is not part of SAN LUN presentation, and export policies apply to NAS protocols rather than FCP/iSCSI LUN access. Relevant SAN ONTAP topics are LUN provisioning, igroups, LUN mapping, LUN IDs, and host discovery.
