Pass the Nutanix NCS Professional NCS-Core Questions and answers with CertsForce

The customer is experiencing VM performance issues characterized by excessive read/write I/Os on CVMs and excessive motion of VMs due to the Distributed Resource Scheduler (DRS) in an ESXi-based Nutanix cluster. This is likely caused by the DRS migration threshold being set to Aggressive, which leads to frequent rebalancing of workloads across the cluster, causing high I/O and VM motion. Adjusting this setting to a less aggressive level can help reduce unnecessary VM motions and stabilize performance.References: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials

When installing Nutanix AOS on Cisco UCS hardware platforms, the recommended method is to use the Foundation VM. This approach allows for the deployment of Nutanix software onto bare metal hardware from a virtual machine that can manage the installation process across multiple nodes simultaneously. The Foundation VM simplifies the installation and initial configuration process, ensuring that all nodes are correctly configured and integrated into the Nutanix ecosystem.References: Nutanix Bible, Nutanix University

Nutanix Security: As part of security improvements (complying with California statute SB-327), Nutanix changed the default IPMI password policy.

Node-Specific Password: Each Nutanix NX hardware node now ships with a unique default IPMI password for the ADMIN user.expand_more This password is the node's serial number (using capital letters).expand_more

Finding the Serial Number: You can locate the node's serial number either on a physical sticker or by running the ipmitool fru print command on the node.

References:

Nutanix Support Portal - Knowledge Base Article 1091: https://portal.nutanix.com/kb/1091

To meet the requirements of maximizing storage space savings while optimizing I/O performance for business-critical applications and general server workloads, enabling both compression and erasure coding on the storage containers is recommended. Compression reduces the data footprint on storage disks, while erasure coding provides data redundancy in an efficient manner, which not only saves space but also enhances data durability and I/O performance for read-intensive applications.References:

Nutanix University - NCS-Core 6.8 Learning Path

The Nutanix Bible, Storage Efficiency chapter (https://www.nutanixbible.com/ )

After creating a cluster and connecting it to the customer's network, if the events dashboard in Prism is full of errors, a likely cause could be that the Cluster Virtual IP Address (VIP) was not properly set up. The VIP is crucial for accessing the Nutanix Prism interface and for the proper functioning of the cluster's management operations.

To determine the correct answer, you must evaluate the requirements for installing a Nutanix NX-3460-G6 block. Each block typically occupies 2U of rack space. Since the customer has two blocks, a total of 4U is required, which fits within the available 5U rack space. Additionally, each block requires two power sockets (one for each node in the block), totaling four sockets. Since there are six available sockets, there is enough power availability. Therefore, the primary constraints are adequately met in terms of rack space and power sockets. The mention of network ports and their sufficiency is not required here, as it isn't the limiting factor based on the details provided.

References:

Nutanix Bible (https://www.nutanixbible.com )

Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com )

Nutanix Deployment Guide

Nutanix Hardware and Installation Guide

If ESXi 6.5 is not available as one of the choices for hypervisor during the Foundation process, the consultant should upload the ESXi image to the specific directory where Foundation expects to find hypervisor images. The correct path for this operation is /home/Nutanix/foundation/isos/hypervisor/esx. This allows the Foundation tool to detect and use the ESXi image for installation on the nodes.References: Nutanix Foundation Guide, Nutanix Support Documentation.

When a Nutanix cluster needs to be re-imaged and nodes are showing as 'Unavailable' during the discovery process in the Foundation tool, it is often due to a deeper issue with the nodes' existing configuration or software state. Using the Phoenix ISO to re-image the nodes is the recommended approach. The Phoenix ISO can be used to completely reinstall the software on the nodes, ensuring that any problematic configurations or software issues are wiped clean, allowing for a fresh installation with the desired version of AOS.

References:

Nutanix Bible: Re-imaging Clusters

Nutanix University: Troubleshooting Installation Issues

Prior to the initial base system setup for a new cluster installation, the consultant needs to document several critical infrastructure details. Among the most important are the DNS and NTP IP addresses (C). These addresses are crucial because they ensure that all nodes within the cluster can resolve domain names properly and synchronize their clocks accurately, which is vital for cluster operations and management. Proper DNS and NTP configurations help prevent many common issues related to name resolution and time synchronization that could affect the performance and stability of the cluster.References: Nutanix Installation Prep Guide, Nutanix Network Configuration Requirements.

The CVM IP address is a hard requirement for deploying a Nutanix cluster. Each CVM must have a unique IP address assigned to it as this IP address is critical for cluster operations, including data replication, management activities, and communication between CVMs and hypervisors. The other options, while important for various functionalities, do not represent a hard requirement for initial deployment.References:

Nutanix University - NCS-Core 6.8 Learning Path

The Nutanix Bible, Cluster Configuration chapter (https://www.nutanixbible.com/ )