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Azure add create a Subnet to existing Virtual Network using PowerShell

This is second part of the earlier written article Create a Azure Virtual Network with Subnet using PowerShell. Here in this blog I will create subnet in already created Azure vNET (Virtual Network). I have defined Azure vNET and subnets in Powershell variables. I am creating a Azure vNET without any subnet as shown in below example.

Download this script New-AzSubnetInvNet.ps1 here or it is also available github.com/janviudapi.

$vNetName = 'global_vnet_eastus'
$resourceGroupName = 'vcloud-lab.com'
$location = 'eastus'
$AddressPrefix = @('10.10.0.0/16')
$subnet01Name = 'prod02-10.10.1.x'
$subnet01AddressPrefix = '10.10.1.0/24'
                                                                                                                                                                pwsh | 20:33:02 
#Create new Azure Virtual Network without subnet
New-AzVirtualNetwork -Name $vNetName -ResourceGroupName $resourceGroupName -Location $location -AddressPrefix $AddressPrefix

Name                   : global_vnet_eastus
ResourceGroupName      : vcloud-lab.com
Location               : eastus
Id                     : /subscriptions/9e2xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/vcloud-lab.com/providers/Microsoft.Network/virtualNetworks/global_vnet_eastus       
Etag                   : W/"771556f5-a9ba-4ff4-8fcc-025e2685c813"
ResourceGuid           : 65c12e07-56bb-4b6d-9316-fcf5d6c0604b
ProvisioningState      : Succeeded
Tags                   :
AddressSpace           : {
                           "AddressPrefixes": [
                             "10.10.0.0/16"
                           ]
                         }
DhcpOptions            : {}
Subnets                : []
VirtualNetworkPeerings : []
EnableDdosProtection   : false
DdosProtectionPlan     : null

Check this article: Remove Azure Virtual Network Subnet using PowerShell

Micrososft azure az powershell vnet virtual network location addressprefix subnet new-azvirtualnetwork resourcegroup addressspcae provisioning state etag ddosprotection.png

I have vNET created now without any subnet, I will get the existing vNET information and while creating/adding a new subnet use the vNET information in the parameter. There are few warning while setting subnet configuration, it can be ignored. By using subnet config command it creates subnet config in memory, Changes are not pushed into vNet yet. 

#Get existing Azure Virtual Network information
$azvNet = Get-AzVirtualNetwork -Name $vNetName -ResourceGroupName $resourceGroupName
Add-AzVirtualNetworkSubnetConfig -Name $subnet01Name -AddressPrefix $subnet01AddressPrefix -VirtualNetwork $azvNet

WARNING: Upcoming breaking changes in the cmdlet 'Add-AzVirtualNetworkSubnetConfig' :
Update Property Name
Cmdlet invocation changes :
    Old Way : -ResourceId
    New Way : -NatGatewayId
Update Property Name
Cmdlet invocation changes :
    Old Way : -InputObject
    New Way : -NatGateway
Note : Go to https://aka.ms/azps-changewarnings for steps to suppress this breaking change warning, and other information on breaking changes in Azure PowerShell.

Name                   : global_vnet_eastus
ResourceGroupName      : vcloud-lab.com
Location               : eastus
Id                     : /subscriptions/9e22xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/vcloud-lab.com/providers/Microsoft.Network/virtualNetworks/global_vnet_eastus       
Etag                   : W/"771556f5-a9ba-4ff4-8fcc-025e2685c813"
ResourceGuid           : 65c12e07-56bb-4b6d-9316-fcf5d6c0604b
ProvisioningState      : Succeeded
Tags                   :
AddressSpace           : {
                           "AddressPrefixes": [
                             "10.10.0.0/16"
                           ]
                         }
DhcpOptions            : {}
Subnets                : [
                           {
                             "Name": "prod02-10.10.1.x",
                             "AddressPrefix": [
                               "10.10.1.0/24"
                             ],
                             "PrivateEndpointNetworkPolicies": "Enabled",
                             "PrivateLinkServiceNetworkPolicies": "Enabled"
                           }
                         ]
VirtualNetworkPeerings : []
EnableDdosProtection   : false
DdosProtectionPlan     : null

add-azvirtualnetworksubnetconfig get-azvirtualnetwork powershell microsoft azure virtual network vnet peering powershell endpoint service private line publick policy.png

This is final command to set subnet configuration to Virtual Network.

$azvNet | Set-AzVirtualNetwork

Name                   : global_vnet_eastus
ResourceGroupName      : vcloud-lab.com
Location               : eastus
Id                     : /subscriptions/9e22xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/vcloud-lab.com/providers/Microsoft.Network/virtualNetworks/global_vnet_eastus       
Etag                   : W/"e3a07d9f-a6aa-44f8-a227-0e82024bdd4b"
ResourceGuid           : 65c12e07-56bb-4b6d-9316-fcf5d6c0604b
ProvisioningState      : Succeeded
Tags                   : 
AddressSpace           : {
                           "AddressPrefixes": [
                             "10.10.0.0/16"
                           ]
                         }
DhcpOptions            : {
                           "DnsServers": []
                         }
Subnets                : [
                           {
                             "Delegations": [],
                             "Name": "prod02-10.10.1.x",
                             "Etag": "W/\"e3a07d9f-a6aa-44f8-a227-0e82024bdd4b\"",
                             "Id": "/subscriptions/9e22xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/vcloud-lab.com/providers/Microsoft.Network/virtualNetworks/global_vnet_e 
                         astus/subnets/prod02-10.10.1.x",
                             "AddressPrefix": [
                               "10.10.1.0/24"
                             ],
                             "IpConfigurations": [],
                             "ServiceAssociationLinks": [],
                             "ResourceNavigationLinks": [],
                             "ServiceEndpoints": [],
                             "ServiceEndpointPolicies": [],
                             "PrivateEndpoints": [],
                             "ProvisioningState": "Succeeded",
                             "PrivateEndpointNetworkPolicies": "Enabled",
                             "PrivateLinkServiceNetworkPolicies": "Enabled",
                             "IpAllocations": []
                           }
                         ]
VirtualNetworkPeerings : []
EnableDdosProtection   : false
DdosProtectionPlan     : null

Microsoft Azure az powershell vnet virtual network Set-AzVirtualNetwork addressprefix ipconfigurations delegation subscription service endpoint dns.png

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