Question # 1 An administrator notices that most of the VMs in the cluster are on one host. Users report that an application seems to respond slowly. The application server VM has significantly more memory assigned to it than other VMs.
How should the administrator fix this issue? A. Reduce the amount of memory assigned to the VM.B. Migrate the VM to a different host.C. Add more memory to the VM.D. Increase the memory on the CVM.
Click for Answer
A. Reduce the amount of memory assigned to the VM.
Answer Description Explanation:
According to the Troubleshoot high memory issues on Azure virtual machines web search result2, one of the common factors in a low memory situation is over-provisioning memory for a VM. Over-provisioning memory can cause memory pressure, which leads to swapping and degraded performance. Therefore, to fix this issue, the administrator should reduce the amount of memory assigned to the VM, based on the average hardware requirements for that operating system and application load.
Question # 2 An administrator is tasked with configuring networking on an AHV cluster and needs to optimize for maximum single VM throughput.
Which bond mode should the administrator select? A. Active-Active with Mac pinningB. Active-ActiveC. Active-BackupD. No Uplink Bond
Click for Answer
B. Active-Active
Answer Description Explanation:
Active-Active is a bond mode that allows all uplinks in the bond to be used simultaneously for traffic transmission and reception. This bond mode provides load balancing and increased bandwidth for the AHV host and its VMs. Active-Active bond mode uses a hashing algorithm based on source MAC addresses to distribute traffic across different uplinks in the bond. Each individual VM NIC uses only a single bond member interface at a time, but multiple VM NICs are spread across different bond member interfaces. As a result, it is possible for a Nutanix AHV node with two 10 Gb interfaces to use up to 20 Gbps of network throughput, while individual VMs have a maximum throughput of 10 Gbps6.
Therefore, if an administrator needs to optimize for maximum single VM throughput, they should select Active-Active bond mode for their AHV cluster. This bond mode can be configured using Prism Element UI or manage-ovs commands on each AHV host7. No additional configuration is required on the upstream switch side, as long as the switches are interconnected physically or virtually and both uplinks trunk the same VLANs8.
Question # 3 An administrator manages an AHV cluster that is dedicated to a dev/test environment. The administrator receiving complaints from users that they are unable to create new VMs on the cluster.
After the reviewing the cluster, the administrator finds that the memory resources are almost fully utilized, with many VMs over-provisioned on memory.
What option is the most efficient resolution to enable additional VMs to be created? A. Enable Memory Overcommit on the over-provisioned VMs.B. Enable Memory HA on the over-provisioned VMs.C. Upgrade the nodes with additional memory DlMMs.D. Disable HA Reservation on the cluster.
Click for Answer
A. Enable Memory Overcommit on the over-provisioned VMs.
Answer Description Explanation:
Enable Memory Overcommit on the over-provisioned VMs is the most efficient resolution to enable additional VMs to be created. Memory overcommit allows VMs to use more memory than physically available on a host by compressing and swapping memory pages to storage1. This can improve memory utilization and increase VM density on a cluster1. However, memory overcommit is not supported when HA is configured to use reserved hosts, so you may need to disable HA reservation on the cluster before enabling memory overcommit1.
Question # 4 An administrator initially performed a cluster Foundation using a flat switch without any VLAN configuration. After the Foundation, the administrator moved the dual 25Gb data ports and single 1Gb IPMI port to the actual switches with the below network configurations:
. All VLANs are tagged
. VLAN 1000 for CVM\Hypervisor traffic
· VLAN 1001 for User VM traffic
. VLAN 100 for IPMI traffic
After moving the IPMI network links, the administrator can no longer ping the IPMI IPs.
Which two changes does the administrator need to make? (Choose two.) A. SSH to AHV and set the VLAN ID using IPMI Tool.B. SSH to CVM and restart network services on all host.C. SSH to AHV and change the IP address using IPMI tool.D. SSH to CVM and restart Genesis on all CVMs.
Click for Answer
A. SSH to AHV and set the VLAN ID using IPMI Tool.C. SSH to AHV and change the IP address using IPMI tool.
Answer Description Explanation:
The issue described pertains to the inability to ping the IPMI IPs after moving the IPMI network links to the actual switches with specific VLAN configurations. The two changes that the administrator needs to make are:
A. SSH to AHV and set the VLAN ID using IPMI Tool: Since all VLANs are tagged in the new network configuration, the IPMI network interface needs to be aware of the VLAN it’s supposed to communicate on. This can be achieved by setting the VLAN ID using the IPMI Tool on the AHV.
C. SSH to AHV and change the IP address using IPMI tool: If the IPMI IP addresses were initially set in a different subnet that is not routable in the new network configuration, the administrator would need to change the IPMI IP addresses to match the new network configuration. This can be done by SSHing to the AHV and using the IPMI Tool to change the IP address.
Question # 5 An administrator needs to periodically send information about cluster efficiency via email to a set of users.
What should be configured to accomplish this task? A. Configure Efficiency widget in Prism Central.B. Create a new' prism Central project.C. update Capacity Configurations in Prism Central.D. Add a schedule to Prism Central reports.
Click for Answer
D. Add a schedule to Prism Central reports.
Answer Description Explanation:
To periodically send information about cluster efficiency via email to a set of users, the administrator can follow these steps:
Create a report in Prism Central that contains the relevant information about cluster efficiency.
Add a schedule to the report to generate and send the report via email to the set of users at a specified frequency.
This will ensure that the users receive regular updates about the cluster efficiency without the need for manual intervention.
Question # 6 When a VM is connected to a Nutanix managed network, when is the IP addressed assigned? A. When the vNIC is created on the VM.B. When the VM is powered on.C. When the guest OS sends a DHCP request.D. When the guest OS receives a DHCP acknowledge.
Click for Answer
B. When the VM is powered on.
Answer Description Explanation:
When a VM is connected to a Nutanix managed network, the IP address is assigned when the VM is powered on. A Nutanix managed network is a network that is created and managed by Prism Central using IP address management (IPAM). IPAM allows Prism Central to automatically assign IP addresses to VMs from a pool of available addresses in a subnet. IPAM also tracks the IP address usage and availability across clusters and networks4.
When a VM is connected to a Nutanix managed network, the administrator can choose one of the following assignment types for the IP address:
Assign Static IP: This option allows the administrator to manually specify a static IP address for the VM from the subnet range. The IP address will not change unless the administrator changes it.
Assign with DHCP: This option allows Prism Central to dynamically assign an IP address for the VM from the subnet range using DHCP. The IP address may change depending on the DHCP lease time and availability.
No Private IP: This option allows the administrator to skip assigning an IP address for the VM. This option is useful for scenarios where the administrator wants to use an external IPAM solution or assign an IP address later5.
Regardless of the assignment type, the IP address is assigned when the VM is powered on. This is because Prism Central needs to communicate with the hypervisor (AHV or ESXi) to configure the virtual NIC (vNIC) of the VM with the IP address information. This communication can only happen when the VM is in a powered on state6.
References: 4: IP Address Management - Prism Central Guide 5: Creating a New Report - Prism Central Guide 6: IP Address Assignment - AHV Networking Guide
Question # 7 Which three upgrades should an administrator be able to perform using Lifecycle Management? (Choose Three) A. AOSB. BMCC. BIOSD. HypervisorE. HBA Firmware
Click for Answer
B. BMCC. BIOSE. HBA Firmware
Question # 8 After deploying a cluster, time is not synchronizing properly.
What task needs to be performed? A. DNS configurationB. NTP configurationC. HA configurationD. SMTP configuration
Click for Answer
B. NTP configuration
Answer Description Explanation:
The task that needs to be performed when time is not synchronizing properly after deploying a cluster is NTP configuration. In the Nutanix Multicloud Infrastructure (NCP-MCI) 6.5, Network Time Protocol (NTP) is used to synchronize the system time across all the nodes in a cluster. If the time is not synchronizing properly, it indicates that there might be an issue with the NTP configuration. Therefore, checking and correcting the NTP configuration would be the appropriate action to resolve this issue. The other options like DNS configuration, HA configuration, and SMTP configuration are not directly related to time synchronization in a cluster.
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