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Free NCP-MCI Exam Braindumps (page: 13)

Page 12 of 45
PDF with 178 Questions

During an AHV upgrade, an administrator finds that a critical VM was powered off rather than migration to another host.

Which scenario explains this behavior?

  1. NO AHV hosts were able to be scheduled.
  2. The VM OS hung during migration.
  3. The VM was on the same host as the acropolis leader.
  4. The VM was marked as an agent VM.

Answer(s): D

Explanation:

An agent VM is a special type of VM that is used for running services or applications that are not affected by high availability (HA) events or host maintenance. An agent VM is never migrated to any other host in the cluster. If an HA event occurs or the host is put in maintenance mode, agent VMs are powered off and are powered on on the same host once that host returns to a normal state. This behavior is different from regular VMs, which are migrated to another host in the cluster if possible, or restarted on the same host if not possible1.

Therefore, during an AHV upgrade, an administrator may find that a critical VM was powered off rather than migrated to another host if the VM was marked as an agent VM. This can be done either from the Prism web console by selecting the Use this VM as an agent VM option in the Update VM dialog box, or from the aCLI by using the vm.create or vm.update commands with the agent_vm=true parameter2. To avoid this situation, the administrator should ensure that any critical VMs are not marked as agent VMs before starting the AHV upgrade.


Reference:

AHV Networking Best Practices



Which two types of granular RBAC does Nutanix provide for AHV hosts? (Choose two.)

  1. Category based
  2. Project based
  3. Disk based
  4. Cluster based

Answer(s): A,D

Explanation:

Nutanix provides two types of granular RBAC for AHV hosts: category based and cluster based3. Category based RBAC allows administrators to assign roles to users or groups based on categories, which are key-value pairs that can be applied to various entities in Prism Central, such as clusters, hosts, VMs, images, and networks. Categories can be used to group entities by different criteria, such as department, project, environment, or location. For example, an administrator can create a category key named Department and assign different values to it, such as Finance, Marketing, or Engineering. Then, the administrator can apply this category to different clusters or hosts and assign roles to users or groups based on this category. This way, users or groups can have different levels of access to different clusters or hosts depending on their department4.

Cluster based RBAC allows administrators to assign roles to users or groups based on specific clusters registered in Prism Central. For example, an administrator can create a role named Cluster Admin and assign it to a user or group for a particular cluster. This way, the user or group can have full access to that cluster and its hosts and VMs, but not to other clusters5.


Reference:

Role-Based Access Control https://portal.nutanix.com/page/documents/details?targetId=Nutanix-Security-Guide-v6_7:sec- cluster-rbac-pc-c.html



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?

  1. Active-Active with Mac pinning
  2. Active-Active
  3. Active-Backup
  4. No Uplink Bond

Answer(s): B

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.


Reference:

Configuring Load Balancing active-backup and balance-slb modes on AHV



Refer to Exhibit:



An administrator wants to replace and old node with a node of newer generation in a 3-node cluster. The administrator has already chosen the appropriate node. But unable to remove it from the cluster.

Why is the Remove Host option not shown in the exhibit?

  1. The host needs to be placed into maintenance Mode before.
  2. It is only possible to remove a host from a cluster using CLI.
  3. It is not possible to remove a node from a the cluster using Prism Central
  4. It is not possible to remove a host from a 3-node cluster.

Answer(s): D

Explanation:

A Nutanix cluster requires a minimum of three nodes to maintain quorum and data availability. Removing a node from a 3-node cluster would violate the redundancy factor and cause data loss. Therefore, it is not possible to remove a host from a 3-node cluster using Prism or CLI. The only way to replace a node in a 3-node cluster is to use the Foundation tool, which will erase the existing cluster configuration and create a new cluster with the new node1.






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