Update for 172.20.X.X examples

Author: fcabreramsft

articles/iot-edge/how-to-create-virtual-switch.md

@@ -34,21 +34,21 @@ Note that if you're using an Azure VM, the virtual switch can't be **External**.
 
 1. Open PowerShell in an elevated session. You can do so by opening the **Start** pane on Windows and typing in "PowerShell". Right-click the **Windows PowerShell** app that shows up and select **Run as administrator**.
 
-2. Check the virtual switches on the Windows host and make sure you don't already have a virtual switch that can be used. You can do so by running the following [Get-VMSwitch](/powershell/module/hyper-v/get-vmswitch) command in PowerShell:
+1. Check the virtual switches on the Windows host and make sure you don't already have a virtual switch that can be used. You can do so by running the following [Get-VMSwitch](/powershell/module/hyper-v/get-vmswitch) command in PowerShell:
 
     ```powershell
     Get-VMSwitch
     ```
 
     If a virtual switch named **Default Switch** is already created and you don't need a custom virtual switch, you should be able to install IoT Edge for Linux on Windows without following the rest of the steps in this guide.
 
-3. Create a new VM switch with a name of your choice and an **Internal** or **Private** switch type by running the following [New-VMSwitch](/powershell/module/hyper-v/new-vmswitch) command, replacing the placeholder values:
+1. Create a new VM switch with a name of your choice and an **Internal** or **Private** switch type by running the following [New-VMSwitch](/powershell/module/hyper-v/new-vmswitch) command, replacing the placeholder values:
 
     ```powershell
     New-VMSwitch -Name "{switchName}" -SwitchType {switchType}
     ```
 
-4. To get the IP address for the switch you created, you must first get its interface index. You can get this value by running the following [Get-NetAdapter](/powershell/module/netadapter/get-netadapter) command, replacing the placeholder value:
+1. To get the IP address for the switch you created, you must first get its interface index. You can get this value by running the following [Get-NetAdapter](/powershell/module/netadapter/get-netadapter) command, replacing the placeholder value:
 
     ```powershell
     (Get-NetAdapter -Name "{switchName}").ifIndex
@@ -59,30 +59,19 @@ Note that if you're using an Azure VM, the virtual switch can't be **External**.
     :::image type="content" source="media/how-to-create-virtual-switch/get-netadapter-output.png" alt-text="Screenshot of the output from running the Get-NetAdapter command, highlighting the interface index value." lightbox="media/how-to-create-virtual-switch/get-netadapter-output.png":::
 
     Take note of the interface index value, as you'll need to use it in future steps.
+    
+6. The resulting virtual switch IP address will be different for each environment. Note that for the rest of the commands in this guide you will make use of IP addresses that are derived from the *172.20.X.Y* family. However, you can you use your own address family and IP addresses.
 
-5. Using the interface index from the previous step, get the IP address of the created switch network adapter by running the following [Get-NetIPAddress](/powershell/module/nettcpip/get-netipaddress) command, replacing the placeholder value:
-
-    ```powershell
-    Get-NetIPAddress -AddressFamily IPv4  -InterfaceIndex {interfaceIndex}
-    ```
-
-    Running this command should output information similar to the following example:
-
-    :::image type="content" source="media/how-to-create-virtual-switch/get-netipaddress-output.png" alt-text="Screenshot of the output from running the Get-NetIPAddress command, highlighting the IP address." lightbox="media/how-to-create-virtual-switch/get-netipaddress-output.png":::
-
-    The resulting virtual switch IP address will be different for each environment. Take note of the IP address, as the rest of the commands in this guide will make use of more IP addresses that are derived from this outputted address.
-
-6. For the other IP addresses, you'll need to create variations where the last octet (the number separated by each dot in an IP address) is replaced by a different value. You'll create and use the following IP addresses:
+    You'll create and use the following IP addresses:
     
-   | IP address        | Template        | Example         |
-   |-------------------|-----------------|-----------------|
-   | Virtual switch IP | xxx.xxx.xxx.yyy | 169.254.229.39  |
-   | Gateway IP        | xxx.xxx.xxx.1   | 169.254.229.1   |
-   | NAT IP            | xxx.xxx.xxx.0   | 169.254.229.0   |
-   | Start IP          | xxx.xxx.xxx.100 | 169.254.229.100 |
-   | End IP            | xxx.xxx.xxx.200 | 169.254.229.200 |
+    | IP address        | Template        | Example         |
+    |-------------------|-----------------|-----------------|
+    | Gateway IP        | xxx.xxx.xxx.1   | 172.20.0.1   |
+    | NAT IP            | xxx.xxx.xxx.0   | 172.20.0.0   |
+    | Start IP          | xxx.xxx.xxx.100 | 172.20.0.100 |
+    | End IP            | xxx.xxx.xxx.200 | 172.20.0.200 |
 
-7. Set the **gateway IP address** by replacing the last octet of your virtual switch IP with a new numerical value, for example 1. Run the following [New-NetIPAddress](/powershell/module/nettcpip/new-netipaddress) command to set the new gateway IP address, replacing the placeholder values:
+1. Set the **gateway IP address** by replacing the last octet of your virtual switch IP address family with a new numerical value. For example, replace last octet with 1 and get the address 172.20.0.1. Run the following [New-NetIPAddress](/powershell/module/nettcpip/new-netipaddress) command to set the new gateway IP address, replacing the placeholder values:
 
     ```powershell
     New-NetIPAddress -IPAddress {gatewayIp} -PrefixLength 24 -InterfaceIndex {interfaceIndex}
@@ -92,7 +81,7 @@ Note that if you're using an Azure VM, the virtual switch can't be **External**.
 
     :::image type="content" source="media/how-to-create-virtual-switch/new-netipaddress-output.png" alt-text="Screenshot of the output from running the New-NetIPAddress command." lightbox="media/how-to-create-virtual-switch/new-netipaddress-output.png":::
 
-8. Create a Network Address Translation (NAT) object that translates an internal network address to an external network. Use the same IPv4 family address from previous steps. Based on the table from step six, the **NAT IP address** corresponds to the original virtual switch IP address, except that the last octet is replaced with a new numerical value, for example 0. Run the following [New-NetNat](/powershell/module/netnat/new-netnat) command to set the NAT IP address, replacing the placeholder values:
+1. Create a Network Address Translation (NAT) object that translates an internal network address to an external network. Use the same IPv4 family address from previous steps. Based on the table from step six, the **NAT IP address** corresponds to the original IP address family, except that the last octet is replaced with a new numerical value, for example 0. Run the following [New-NetNat](/powershell/module/netnat/new-netnat) command to set the NAT IP address, replacing the placeholder values:
 
     ```powershell
     New-NetNat -Name "{switchName}" -InternalIPInterfaceAddressPrefix "{natIp}/24"
@@ -118,13 +107,13 @@ The switch is now created. Next, you'll set up the DNS.
     Get-WindowsFeature -Name 'DHCP'
     ```
 
-2. If the DHCP server isn't already installed, do so by running the following command:
+1. If the DHCP server isn't already installed, do so by running the following command:
 
     ```powershell
     Install-WindowsFeature -Name 'DHCP' -IncludeManagementTools
     ```
 
-3. Add the DHCP Server to the default local security groups and restart the server.
+1. Add the DHCP Server to the default local security groups and restart the server.
 
     ```powershell
     netsh dhcp add securitygroups
@@ -133,15 +122,15 @@ The switch is now created. Next, you'll set up the DNS.
 
     You'll receive the following warning messages while the DHCP server is starting up: `WARNING: Waiting for service 'DHCP Server (dhcpserver)' to start...`
 
-4. To configure the DHCP server range of IPs to be made available, you'll need to set an IP address as the **start IP** and an IP address as the **end IP**. This range is defined by the **StartRange** and the **EndRange** parameters in the [Add-DhcpServerv4Scope](/powershell/module/dhcpserver/add-dhcpserverv4scope) command. You'll also need to set the subnet mask when running this command, which will be 255.255.255.0. Based on the IP address templates and examples in the table from the previous section, setting the **StartRange** as 169.254.229.100 and the **EndRange** as 169.254.229.200 will make 100 IP addresses available. Run the following command, replacing the placeholders with your own values:
+1. To configure the DHCP server range of IPs to be made available, you'll need to set an IP address as the **start IP** and an IP address as the **end IP**. This range is defined by the **StartRange** and the **EndRange** parameters in the [Add-DhcpServerv4Scope](/powershell/module/dhcpserver/add-dhcpserverv4scope) command. You'll also need to set the subnet mask when running this command, which will be 255.255.255.0. Based on the IP address templates and examples in the table from the previous section, setting the **StartRange** as 169.254.229.100 and the **EndRange** as 169.254.229.200 will make 100 IP addresses available. Run the following command, replacing the placeholders with your own values:
 
     ```powershell
     Add-DhcpServerV4Scope -Name "AzureIoTEdgeScope" -StartRange {startIp} -EndRange {endIp} -SubnetMask 255.255.255.0 -State Active
     ```
 
     This command should produce no output.
 
-5. Assign the **NAT** and **gateway IP** addresses you created in the earlier section to the DHCP server, and restart the server to load the configuration. The first command should produce no output, but restarting the DHCP server should output the same warning messages that you received when you did so in the third step of this section.
+1. Assign the **NAT** and **gateway IP** addresses you created in the earlier section to the DHCP server, and restart the server to load the configuration. The first command should produce no output, but restarting the DHCP server should output the same warning messages that you received when you did so in the third step of this section.
 
     ```powershell
     Set-DhcpServerV4OptionValue -ScopeID {natIp} -Router {gatewayIp}