Hands-on exercise – exploring private IP assignments

In this exercise, you will explore private IP assignment options for VNet resources. Here are the tasks that you will complete in this exercise:

• Task 1 – deploying VMs with dynamic and static private IP assignments

Let’s get into this!

Task 1 – deploying VMs with dynamic and static private IP assignments

The steps are as follows:

1. In the Azure Cloud Shell environment, enter the following commands to set the values that we will use for the following variables: resource group, location, VNet, subnet, and VM size. Replace the Standard_B2s value if you are using a different size than you verified in the previous exercise:

   group=CharisTechRG
   location=eastus
   VNet=CoreServicesVNet
   subnet=PublicWebServiceSubnet
   size=Standard_B2s

2. Deploy a VM called WebVM0 into PublicWebServiceSubnet of CoreServicesVNet with the az vm create command. This will default to the dynamic private IP assignment method:

   az vm create -g $group -n WebVM0 --image UbuntuLTS --admin-username azureuser --generate-ssh-keys --VNet-name $VNet --subnet $subnet --size $size --public-ip-address ""

The following figure shows the output of this command. Ignore the warning about the public IP as the VM is created without a public IP assigned.

Figure 1.40 – VM creation with the default dynamic private IP assignment

3. Deploy a VM called WebVM1 into PublicWebServiceSubnet of CoreServicesVNet with the az vm create command. This time around, we will specify a static private IP assignment of 10.10.3.10:

   az vm create -g $group -n WebVM1 --image UbuntuLTS --admin-username azureuser --generate-ssh-keys --VNet-name $VNet --subnet $subnet --size $size --public-ip-address "" --private-ip-address "10.10.3.10"

The following figure shows the output of this command. Ignore the warning about the public IP as the VM is created without a public IP assigned.

Figure 1.41 – VM creation with the default dynamic private IP assignment

4. Review the private IP assignment of the VM network interfaces using the az network nic list command:

   az network nic list -g $group --query "[*].{NIC:name, PrivateIP: ipConfigurations[0].privateIpAddress, Assignment: ipConfigurations[0].privateIpAllocationMethod, IPVersion: ipConfigurations[0].privateIpAddressVersion}" -o table

The --query parameter is used to sort through the JSON array response to select the properties that we are interested in. The following screenshot shows what the output looks like:

Figure 1.42 – The VM NIC dynamic private IP assignment

Leave Cloud Shell open for the last exercise in this chapter.