Virtual Networks

# Define subnets
$appSubnet = New-AzVirtualNetworkSubnetConfig `
  -Name "snet-app" `
  -AddressPrefix "10.0.1.0/24"
 
$dataSubnet = New-AzVirtualNetworkSubnetConfig `
  -Name "snet-data" `
  -AddressPrefix "10.0.2.0/24"
 
# Create the VNet with subnets
New-AzVirtualNetwork `
  -ResourceGroupName "rg-network-prod-uks-01" `
  -Name "vnet-prod-uks-01" `
  -Location "uksouth" `
  -AddressPrefix "10.0.0.0/16" `
  -Subnet $appSubnet, $dataSubnet

# Create a VNet with an address space
az network vnet create \
  --resource-group rg-network-prod-uks-01 \
  --name vnet-prod-uks-01 \
  --address-prefix 10.0.0.0/16 \
  --location uksouth
 
# Add a subnet for application workloads
az network vnet subnet create \
  --resource-group rg-network-prod-uks-01 \
  --vnet-name vnet-prod-uks-01 \
  --name snet-app \
  --address-prefix 10.0.1.0/24
 
# Add a subnet for databases
az network vnet subnet create \
  --resource-group rg-network-prod-uks-01 \
  --vnet-name vnet-prod-uks-01 \
  --name snet-data \
  --address-prefix 10.0.2.0/24

# List all VNets in a resource group
Get-AzVirtualNetwork -ResourceGroupName "rg-network-prod-uks-01" |
  Format-Table Name, Location, AddressSpace
 
# Show VNet details including subnets
$vnet = Get-AzVirtualNetwork `
  -ResourceGroupName "rg-network-prod-uks-01" `
  -Name "vnet-prod-uks-01"
 
# List subnets
$vnet.Subnets | Format-Table Name, AddressPrefix

# List all VNets in a resource group
az network vnet list \
  --resource-group rg-network-prod-uks-01 \
  --output table
 
# Show VNet details including subnets
az network vnet show \
  --resource-group rg-network-prod-uks-01 \
  --name vnet-prod-uks-01
 
# List subnets
az network vnet subnet list \
  --resource-group rg-network-prod-uks-01 \
  --vnet-name vnet-prod-uks-01 \
  --output table

$vnetProd = Get-AzVirtualNetwork -ResourceGroupName "rg-network-prod-uks-01" -Name "vnet-prod-uks-01"
$vnetDev  = Get-AzVirtualNetwork -ResourceGroupName "rg-network-dev-uks-01"  -Name "vnet-dev-uks-01"
 
# Peer prod to dev (direction 1)
Add-AzVirtualNetworkPeering `
  -Name "peer-prod-to-dev" `
  -VirtualNetwork $vnetProd `
  -RemoteVirtualNetworkId $vnetDev.Id `
  -AllowForwardedTraffic
 
# Peer dev to prod (direction 2)
Add-AzVirtualNetworkPeering `
  -Name "peer-dev-to-prod" `
  -VirtualNetwork $vnetDev `
  -RemoteVirtualNetworkId $vnetProd.Id `
  -AllowForwardedTraffic
 
# Check peering state
Get-AzVirtualNetworkPeering `
  -ResourceGroupName "rg-network-prod-uks-01" `
  -VirtualNetworkName "vnet-prod-uks-01" |
  Format-Table Name, PeeringState

# Peer vnet-prod to vnet-dev (direction 1)
az network vnet peering create \
  --resource-group rg-network-prod-uks-01 \
  --name peer-prod-to-dev \
  --vnet-name vnet-prod-uks-01 \
  --remote-vnet /subscriptions/<sub-id>/resourceGroups/rg-network-dev-uks-01/providers/Microsoft.Network/virtualNetworks/vnet-dev-uks-01 \
  --allow-vnet-access
 
# Peer vnet-dev to vnet-prod (direction 2)
az network vnet peering create \
  --resource-group rg-network-dev-uks-01 \
  --name peer-dev-to-prod \
  --vnet-name vnet-dev-uks-01 \
  --remote-vnet /subscriptions/<sub-id>/resourceGroups/rg-network-prod-uks-01/providers/Microsoft.Network/virtualNetworks/vnet-prod-uks-01 \
  --allow-vnet-access
 
# Check peering state (should show "Connected")
az network vnet peering list \
  --resource-group rg-network-prod-uks-01 \
  --vnet-name vnet-prod-uks-01 \
  --output table