NS0-185 Sample Questions & Answers

A broadcast domain groups network ports (physical ports, VLAN ports, or interface groups), usually from several nodes, that belong to the same layer 2 network; the ports in the group can then be used by an SVM for data or management traffic, and a port must be in a broadcast domain before it can host a LIF. When VLANs segregate departments such as Sales (VLAN 100) and Engineering (VLAN 200), each VLAN defines a separate broadcast domain (for example, the e0c-100 ports of all nodes in one and the e0c-200 ports in another). ONTAP also creates a failover group with the same name for each broadcast domain. An IPspace is a separate IP address space that contains broadcast domains, a failover group only lists failover targets, and an interface group aggregates physical ports.

True. Nodes communicate over a private, dedicated cluster interconnect, and NetApp's cabling best practice is to keep cluster traffic on a separate network from all other traffic. In a two-node switchless cluster the dedicated cluster ports are cabled directly between the controllers; in a switched cluster they connect to a pair of NetApp-supported cluster switches ('Only NetApp-validated back-end switches (ordered from NetApp) are supported'), which do not carry client data, management, or intercluster replication traffic. VLANs cannot be created on cluster ports, and a cluster LIF cannot be on the same subnet as a management or data LIF.

NetApp best practices for Cisco Nexus cluster switches mandate a minimum of two ISLs for redundancy. These ISLs should be configured using the last two ports on each switch (e.g., ports 31 and 32 on a 32-port switch) and cabled to the corresponding ports on the peer switch. This specific port usage is expected by the Reference Configuration File (RCF).

NetApp supplies a Reference Configuration File (RCF) for each supported cluster switch; the RCF defines the port assignments, VLANs, and network settings for cluster operation. For the BES-53248, the RCF is downloaded from the Broadcom Cluster Switches page on the NetApp Support Site (mysupport.netapp.com) and applied after the initial switch configuration, the EFOS installation, and any port licenses (with script apply, followed by write memory). The BES-53248 runs Broadcom EFOS (FASTPATH is the OS of the older NetApp CN1610), and the RCF is not an EFOS image, an ONTAP script, or a file generated by the cluster setup wizard.

The ONTAP node-removal procedure is run at the advanced privilege level. It first identifies the node that holds epsilon with cluster show and, if that node is being removed, moves epsilon before the removal: cluster modify -node -epsilon false, then cluster modify -node -epsilon true on a node that is not being removed. Only after that (and after forcing a new RDB primary if the node is the current primary) is cluster remove-node run from a node that stays in the cluster. The procedure does not rely on the removal command, or on node IDs, to reassign epsilon.

An intercluster LIF is a specific type of logical interface designed exclusively for traffic between peered clusters. This includes SnapMirror, SnapVault, and MetroCluster traffic. These LIFs must be created on ports that are designated for intercluster traffic before a cluster peer relationship can be successfully established and used for replication.

The ONTAP security hardening guide (TR-4569) recommends multifactor authentication for administrative access (chained SSH publickey plus password authentication is available from ONTAP 9.3, with nsswitch, domain, or TOTP second factors in later releases), a login banner configured with security login banner modify that is displayed before authentication during SSH and console login, and securely offloading audit and syslog data with cluster log-forwarding create, preferably with the tcp-encrypted protocol. For SSH the guide recommends passwords for user sessions and public keys for machine access, rather than disabling passwords. Non-expiring admin passwords are not a hardening practice, and the cluster network must remain a private network used only for cluster LIFs.

The ONTAP security hardening guide (TR-4569) recommends multifactor authentication for administrative access (chained SSH publickey plus password authentication is available from ONTAP 9.3, with nsswitch, domain, or TOTP second factors in later releases), a login banner configured with security login banner modify that is displayed before authentication during SSH and console login, and securely offloading audit and syslog data with cluster log-forwarding create, preferably with the tcp-encrypted protocol. For SSH the guide recommends passwords for user sessions and public keys for machine access, rather than disabling passwords. Non-expiring admin passwords are not a hardening practice, and the cluster network must remain a private network used only for cluster LIFs.

The ONTAP security hardening guide (TR-4569) recommends multifactor authentication for administrative access (chained SSH publickey plus password authentication is available from ONTAP 9.3, with nsswitch, domain, or TOTP second factors in later releases), a login banner configured with security login banner modify that is displayed before authentication during SSH and console login, and securely offloading audit and syslog data with cluster log-forwarding create, preferably with the tcp-encrypted protocol. For SSH the guide recommends passwords for user sessions and public keys for machine access, rather than disabling passwords. Non-expiring admin passwords are not a hardening practice, and the cluster network must remain a private network used only for cluster LIFs.

The network port show command provides details about the physical ports on a node, including their link status (up/down), speed, duplex, and health. This is the most direct command to verify layer 1 connectivity before investigating logical configurations like LIFs or broadcast domains.

NetApp shelf procedures say to run Active IQ Config Advisor before and after hot-adding a shelf: before, to capture a snapshot of existing connectivity, firmware versions, and shelf IDs already in use; after, to verify that the shelves are cabled correctly and shelf IDs are unique. Installation guides also end with running Config Advisor to verify the health of the new system, and its report can be included in the handoff documentation. Config Advisor collects data from a live system, so it does not validate a paper design before the hardware is installed; Hardware Universe and the IMT are planning references, and Digital Advisor analyzes AutoSupport data.

While all aspects of training are important, ensuring the customer understands that AutoSupport is the primary mechanism for proactive support, health monitoring, and expedited case resolution is paramount. Verifying its configuration and successful transmission is the most critical support-related task to hand over, as it directly impacts the long-term health and supportability of the system through tools like Active IQ.