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Difficulty: Very hardConfigure Public and Private IP Addresses

An administrator is configuring a virtual machine named VM-Prod1 in the East US region. VM-Prod1 has a single network interface named nic-prod1 connected to a subnet with the address prefix 10.10.1.0/24. VM-Prod1 is currently a member of the backend pool of an active Standard Load Balancer.

The administrator needs to associate an additional public IP address named pip-mgmt to VM-Prod1 to allow direct administrative access to a secondary service running on the virtual machine.

Which of the following configuration steps must the administrator perform to support this design? (Select two.)

  1. Create a secondary IP configuration on nic-prod1 with a Static private IP address allocation.Answer
  2. Provision pip-mgmt using the Standard SKU.Answer
  3. C
    Create a secondary IP configuration on nic-prod1 with a Dynamic private IP address allocation.
  4. D
    Provision pip-mgmt using the Basic SKU with Dynamic allocation.

Answer

Creating a secondary IP configuration on the network interface using a static private IP address, and provisioning the new public IP address using the Standard SKU.
To support the design, the administrator must configure a secondary IP configuration on the network interface with a static private IP allocation and provision the public IP using the Standard SKU. This is because any public IP address associated with a virtual machine in the backend pool of a Standard Load Balancer must also be of the Standard SKU. Additionally, Azure requires all secondary IP configurations on a network interface to have a static private IP address allocation, as dynamic allocation is restricted to the primary IP configuration.

Step-by-Step Solution

1
Determine the SKU requirement for the new public IP address.
Since the VM is part of a Standard Load Balancer's backend pool, the public IP directly attached to its NIC must also be a Standard SKU.
Azure does not support mixing Basic SKU and Standard SKU public IP resources on the same virtual machine or load balancer backend pool.
2
Determine the allocation method for the Standard SKU public IP.
The Standard SKU public IP must be allocated statically.
Standard SKU public IP addresses in Azure only support the Static allocation method.
3
Configure the private IP address settings for the new configuration on the network interface.
Create a secondary IP configuration and set its private IP allocation method to Static.
Azure virtual network interfaces only support Dynamic private IP allocation on the primary IP configuration; all secondary configurations must use Static private IP allocation.

Key Concept

Standard SKU alignment and secondary IP configuration constraints on virtual machine network interfaces.
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Configure Public and Private IP Addresses

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