NS0-162 Sample Questions Answers

 You can use ONTAP System Manager or the command line interface to disable the unused Ethernet ports in an ONTAP 9.8 cluster. ONTAP System Manager is a web-based graphical user interface that enables you to manage storage systems, clusters, and resources. The command line interface is a text-based interface that enables you to perform administrative tasks using commands. Both methods allow you to modify the network port settings and remove the ports from the broadcast domain. Active IQ Config Advisor and Active IQ Unified Manager are not methods to disable the unused Ethernet ports, but tools to monitor and optimize the cluster performance and configuration. References :- Monitor the reachability of network ports in ONTAP 9.8 and later, Map network ports using ONTAP 9.8 or later, Map network ports using ONTAP 9.7 or earlier

 To join an SVM for CIFS access only to an existing Active Directory domain, you need to perform the following actions:

Domain Name System

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• Create DNS entries for the SVM name and the data LIF IP address on the DNS server that is authoritative for the domain. This enables the domain controller to resolve the SVM name and the data LIF IP address.

• Create a data LIF on the SVM that will be used by the CIFS clients to access the data. The data LIF must have an IP address that belongs to the same subnet as the domain controller or a routable subnet.

• Create NTP entries for the SVM to synchronize the time with the domain controller. The time difference between the SVM and the domain controller must be within five minutes, otherwise the domain join operation will fail.

• You do not need to create export policies or cluster LIFs for CIFS access only. References :- Join a SVM to an Active Directory domain, Create a new SVM with a CIFS volume and share, ONTAP - Joining an SVM to an Active Directory domain

Storage efficiency features are techniques that reduce the amount of physical storage required to store data. ONTAP supports various storage efficiency features, such as deduplication, compression, and compaction. On AFF systems, some of these features are enabled by default on all newly created volumes. According to the documentation1, the following storage efficiency features are enabled by default on AFF systems:

• Aggregate-level compression: This feature compresses data blocks at the aggregate level, reducing the physical space required to store data. Aggregate-level compression is applied after all other storage efficiency features, such as deduplication and compaction, are applied at the volume level. Aggregate-level compression is enabled by default on all aggregates on AFF systems.
• Volume-level inline deduplication: This feature eliminates duplicate data blocks within a volume before they are written to disk, reducing the amount of data written and improving performance. Volume-level inline deduplication is enabled by default on all volumes on AFF systems.

Other storage efficiency features, such as LUN-level compression and aggregate-level inline deduplication, are not enabled by default on AFF systems. LUN-level compression is a feature that compresses data blocks at the LUN level, reducing the logical space required to store data. LUN-level compression is disabled by default on all LUNs on AFF systems, and it is not recommended to enable it unless there is a specific use case. Aggregate-level inline deduplication is a feature that eliminates duplicate data blocks across volumes within an aggregate before they are written to disk, reducing the amount of data written and improving performance. Aggregate-level inline deduplication is disabled by default on all aggregates on AFF systems, and it is recommended to enable it only on aggregates that contain volumes with similar data sets. References :- Inline storage efficiency enabled by default on AFF systems, Storage efficiency features, LUN-level compression, Aggregate-level inline deduplication

The security method that would be used to authenticate targets and initiators in an ISCSI environment is CHAP. CHAP stands for Challenge Handshake Authentication Protocol, and it is a method that validates the identity of targets and initiators during the initial link. CHAP uses a shared secret (a password) that is exchanged between the target and the initiator in a challenge-response manner. CHAP can be used in both one-way and mutual modes, depending on whether both parties need to authenticate each other or not. The other options are not valid for this scenario because:

• NIS is a network information service that provides centralized management of user accounts and host names, but it does not provide authentication for ISCSI devices.
• LDAP is a protocol for accessing and managing directory services, such as user and group information, but it does not provide authentication for ISCSI devices.
• /etc/hosts is a file that maps host names to IP addresses, but it does not provide authentication for ISCSI devices. References :- How iSCSI authentication works, Securing iSCSI Devices, Configure iSCSI authentication

 The correct way to warm the cache before clients access the cache volume for the first time is to prepopulate the cache volume with data from the origin volume using the flexcache prepopulate start command. This command copies the data blocks from the origin volume to the cache volume in the background, without affecting the client access to the origin volume. The other options are not valid for this scenario because:

• Enabling block-level invalidation using the volume flexcache origin config modify command does not warm the cache, but rather allows the origin volume to invalidate the cached data blocks when they are modified or deleted.
• Copying the data from the origin volume to the cache volume with the NetApp XCP Migration Tool is not recommended, as it can cause data inconsistency and performance degradation. XCP is a data migration tool that can copy data between different types of volumes, such as FlexVol and FlexGroup, but not between FlexCache and origin volumes.
• Synchronizing the origin and cache first with the volume flexcache sync-properties command does not warm the cache, but rather ensures that the cache volume inherits the properties of the origin volume, such as size, security style, and export policy. References :- Prepopulate a FlexCache volume, FlexCache volume concepts, FlexCache volume best practices

 Active IQ Unified Manager, Cloud Insights, and Active IQ OneCollect are three NetApp products that can export the monthly performance data of your ONTAP 9.8 cluster to a CSV file for further processing. Active IQ Unified Manager is a web-based application that monitors and manages the health and performance of your ONTAP clusters. You can export data to CSV and PDF files for reporting from the Active IQ Unified Manager web UI1. Cloud Insights is a cloud-based monitoring and optimization tool that provides insights into your hybrid cloud infrastructure. You can export data to CSV files from the Cloud Insights dashboard. Active IQ OneCollect is a data collection tool that gathers configuration and performance data from your NetApp and third-party storage systems. You can export data to CSV files from the Active IQ OneCollect GUI. References :- Performance monitoring and management overview, Exporting data to CSV files for reporting, Exporting data to CSV and PDF files for reporting, [Exporting data to CSV files], [Exporting data to CSV files]

IPspaces enable you to create multiple logical networks on a single physical network. Each IPspace contains a set of ports, broadcast domains, subnets, and routing groups that are isolated from other IPspaces. By using IPspaces, you can avoid IP address conflicts and routing issues when connecting to different networks that use the same or overlapping IP subnets. In this scenario, you can create a separate IPspace for the intercluster LIFs of AcmeClusOl and WidgetsClusOl, and assign them different subnets that do not overlap with the local subnet at your company. This way, the clusters can communicate with each other without interference from the local network traffic. References :- ONTAP 9 Network Management Guide, ONTAP 9 Cluster and SVM Peering Express Guide, ONTAP 9 Cluster and SVM Peering Guide

The auto-revert option determines whether a LIF automatically reverts to its home port after a failover event. If this option is set to true, the LIF will revert to its home port when it becomes available. If this option is set to false, the LIF will remain on the failover port until manually reverted. In this scenario, the cluster LIFs are not on their home ports after an ONTAP upgrade, which might have triggered a failover event. Therefore, setting the auto-revert option to true would change this outcome and ensure that the LIFs return to their home ports after the upgrade. References :- network interface modify, Verify all LIFS are on home ports after ONTAP upgrade

The correct action to solve the problem is to update the Selective LUN Map configuration for the LUN mapping. Selective LUN Map (SLM) is a feature that enables you to control which LUNs are visible to which hosts in an ONTAP cluster. SLM reduces the number of paths that are presented to the host and improves the performance and manageability of the SAN environment1. When you perform a volume move, the LUN mapping is automatically updated to include the new node as a destination node, but the old node remains as a source node until the move is completed. This causes ALUA to see twice the number of paths to the LUN, as both nodes are active for the LUN. To avoid this, you need to update the SLM configuration to remove the source node from the LUN mapping after the volume move is done2. Changing the MPIO policy on the host, ensuring that the fabric zoning is correct, or rebooting the host are not actions that would solve the problem, as they do not affect the LUN mapping or the ALUA state. References :- Selective LUN Map overview, How to use Selective LUN Map (SLM) with Volume Move

When a LUN has space reservations disabled (a non-space-reserved LUN), and its containing volume has no space guarantee, ONTAP reports the volume usage based on the actual data written to the LUN, not the LUN size. Therefore, ONTAP reports that the volume is using 10 GB of its containing aggregate, and the volume is 10% full. References :- Understanding space reservations for LUNs in System Manager, Recommended volume and file or LUN configuration combinations overview

 The problem is that the host IP address does not match the export policy rule. The export policy rule shown in the exhibit specifies that any client with an IP address within the 10.0.1.0/24 subnet can access the volume using NFSv3, as indicated by “Access Protocol” set to “any” and “Client Match” set to “10.0.1.0/24”. However, the Linux host has an IP address of 10.0.1.24, which falls outside this range, leading to a mismatch between the host IP and export policy rule. To fix this problem, the export policy rule should be modified to include the host IP address or a broader subnet that covers it. References :- Add a rule to an export policy, vserver export-policy rule create, Create an export policy for the volume

 The broadcast-domain split command allows you to create a new broadcast domain by moving one or more ports from an existing broadcast domain to the new one. In this scenario, you can use this command to move the e0e and e0c ports from the Default broadcast domain to a new broadcast domain in the same IPspace. This would satisfy the requirement of creating a new broadcast domain with the specified ports. The other options are not valid for this scenario, as they either create a new broadcast domain without moving any ports (A), merge two existing broadcast domains into one (D), or require a graphical user interface ©. References :- network port broadcast-domain split, Create a broadcast domain

The number of root aggregates that are created during deployment of two NetApp AFF A400 HA pairs is 8. Each AFF A400 HA pair consists of two nodes, and each node has one root aggregate that contains the root volume. Therefore, two AFF A400 HA pairs have 2 x 2 x 2 8 root aggregates in total. The other options are incorrect because they do not match the number of nodes and root aggregates in the scenario. References :- Manage node root volumes and root aggregates, AFF A400 All-Flash Storage Array

 ONTAP auditing generates binary log files that record the file and folder access events based on the audit policies. By default, ONTAP converts the binary log files to the EVTX file format, which is compatible with Microsoft Event Viewer. The EVTX files are stored in a location specified by the SVM administrator. To view the audit event logs, you can import the EVTX files into Microsoft Event Viewer and filter, sort, and analyze the events. You can also use other tools that support the EVTX file format, such as Microsoft Log Parser or third-party software12. The other options are not valid ways to accomplish this task. References :- View the audit event logs, How to access audit logs?

When you set up an ONTAP cluster, the cluster setup process automatically creates the admin SVM and the node SVMs for the cluster. The admin SVM represents the cluster and provides cluster-wide management services. The node SVMs represent the individual nodes of the cluster and provide node-specific management services. The data SVMs and the cluster SVMs are not automatically created, but can be created manually or by using the System Manager GUI. The data SVMs provide data access to the clients and applications using various protocols. The cluster SVMs provide intercluster communication and data replication between clusters12. References :- Types of SVMs, ONTAP - Types of SVMs

 To find the highest latency seen on restore, you need to look at the output of the table that shows the latency measurements for different operations and sizes. The highest latency is 10021 ms, which is the maximum latency for the GET operation with 8KB size. This means that when the users recover files with the Windows Previous Versions tab, they are reading data from the cloud tier that has been tiered using the snapshot-only policy, which causes high latency and slow restores.

• The other latencies are not correct, as they are lower than 10021 ms. The maximum latency for the PUT operation with 4MB size is 10500 ms, but this is not related to the restore operation, as it is writing data to the cloud tier. The maximum latency for the GET operation with 4KB size is 9591 ms, which is slightly lower than 10021 ms. The maximum latency for the GET operation with 32KB size is 7889 ms, which is much lower than 10021 ms. The maximum latency for the GET operation with 256KB size is 7838 ms, which is also much lower than 10021 ms. References :- FabricPool overview, FabricPool requirements, FabricPool best practices, High READ Latency from the fabric pool aggregate.

The problem of being unable to upload large files or migrate VMs to the new NFS datastore is likely caused by a mismatch in the maximum transmission unit (MTU) settings between the network switches, the ONTAP cluster, and the vSphere hosts. The exhibit shows that the broadcast domain for the NFS LIF has an MTU of 9,000 bytes, which means that it is configured for jumbo frames. However, the default MTU for the VMkernel ports on the vSphere hosts is 1,500 bytes, which means that they are not configured for jumbo frames. This can result in packet fragmentation, dropped packets, or reduced performance. To correct the problem, the MTU of the VMkernel ports on the vSphere hosts should be changed to 9,000 bytes to match the MTU of the broadcast domain and the network switches. This will enable the vSphere hosts to send and receive jumbo frames and improve the NFS performance. References :- ProvisionNFS storage for VMware datastores, vSphere NFS datastore - Version 3 with ONTAP, Configure jumbo frames for VMkernel networking

 FLI (Foreign LUN Import) is a feature built into ONTAP that allows users to import data from foreign array LUNs to NetApp LUNs in a simple and efficient manner. FLI supports four main types of migration workflows: online, offline, transition, and automated. FLI leverages FlexArray technology to discover the foreign RAID array LUNs and pull data from them. FLI can migrate data between heterogeneous storage arrays from EMC, Hitachi, HP, and other vendors to NetApp as supported by FlexArray configuration12.

XCP is a NetApp tool that provides fast and scalable data migration and data copy services for any NAS environment. XCP can copy data from any NFS or SMB/CIFS source to any NFS or SMB/CIFS destination, regardless of the vendor or protocol version. XCP can also preserve file attributes, permissions, ownership, and timestamps during the copyprocess. XCP can be used for file-level migrations, such as NFS and CIFS/SMB, which are not supported by FLI34.

References :- Migration types supported by Foreign LUN Import, Foreign LUN Import overview, XCP overview, Data Migration Tools Quick Reference

To find the MAC address of the offline interface e0c, you need to look at the output of the network port show command for Node1, which shows the MAC address and the health status of each port. The MAC address of e0c is 00:a0:98:f1:2e:b2 and its health status is degraded, indicating that it has gone offline. This is the MAC address that you would supply to the engineering team.

• The other MAC addresses are not correct, as they belong to different interfaces or nodes. The MAC address of e0d is 00:a0:98:f1:2e:b3 and its health status is healthy, indicating that it is still online. The MAC address of a0a is 02:a0:98:f1:2e:be and it is the active MAC address of the ifgrp that includes e0c and e0d. The MAC address of ala is 02:a0:98:f1:21:88 and it is the active MAC address of the ifgrp on Node2, which is not relevant to the question. References :- network port show - NetApp, network interface show - NetApp, How does a VIF MAC address get assigned in ONTAP 7?.

 ONTAP System Manager and ONTAP CLI are two tools that you can use to monitor system performance in real time. ONTAP System Manager is a web-based interface that provides a graphical view of the cluster performance, including CPU, network, disk, and volume utilization. You can also drill down to view the performance of individual nodes, aggregates, LIFs, and protocols. ONTAP CLI is a command-line interface that provides various commands to view the performance statistics of the cluster, such as sysstat, statistics, qos, and perf. You can use these commands to view the performance metrics in different formats, intervals, and levels of detail. The other tools are not suitable for real-time performance monitoring, as they provide historical or predictive analysis. Active IQ Unified Manager is a tool that collects and analyzes performance data from multiple clusters and provides alerts, reports, and recommendations based on the data. Active IQ Digital Advisor is a tool that provides insights and recommendations for your NetApp systems based on data collected from AutoSupport. References :- Monitor cluster performance, What commands are useful to monitor performance in ONTAP 9?, Analyze performance graphs, NetApp launches monitoring, alerting, and troubleshooting for ONTAP from cloud

 You can use either XCP or the in-place conversion feature to move data from a FlexVol volume to a FlexGroup volume. XCP is a data migration tool that can copy data between different types of volumes, such as FlexVol and FlexGroup. The in-place conversion feature, introduced in ONTAP 9.7, allows you to convert a FlexVol volume to a FlexGroup volume without requiring a data copy or additional disk space. However, you cannot convert a FlexGroup volume back to a FlexVol volume. SnapMirror is not a valid option for this scenario, because it does not support replicating data from FlexVol to FlexGroup volumes. A FlexVol to FlexGroup conversion is supported, but only for transitioned volumes starting from ONTAP 9.8. References :- Converting FlexVol volumes to FlexGroup volumes overview, Can a FlexGroup be converted to a FlexVol?, Can I convert a Flexvol to FlexGroup without rewarming the tiered data?

 The NetApp Hardware Universe (HWU) is a web-based tool that provides information about NetApp hardware products, including system specifications, supported configurations, and compatibility matrices. The HWU can help you determine which ports to use to expand your cluster by selecting your system model and viewing the available ports and their functions. You can also compare different models and generate reports based on your criteria. References :- NetApp Hardware Universe, Detailed guide - AFF A400

To find out how many files are in the NAS volumes of the cluster and how old these files are, you can use the following two tools:

• ONTAP System Manager 9.8 provides a way for admins to find out file system information in any NAS storage volume quickly and easily by enabling a low-impact scanner for each volume. This scanner crawls the ONTAP file system in the background with a low priority job and delivers a wealth of information that is available as soon as you navigate to the volume details page. You can see the file and directory count, the file-age histograms, the capacity use, and other parameters for each volume1.
• ONTAP CLI provides the filestats command that can display a summary of file statistics within a volume on a storage system by reading the file information from a snapshot copy that you specify. You can use various options to filter the output by file size, file type, file age, and so on2.
• Active IQ Config Advisor and Active IQ Unified Manager are not the tools that can fulfill this requirement, as they are mainly used for monitoring and managing the health, performance, and configuration of the cluster, not the file system details of the volumes34. References :- Active IQ Config Advisor, Active IQ Unified Manager, How to report file sizes within a volume using the filestats command, ONTAP 9.8 Feature Overview.