added vm nic chaining to portal doc

Author: asudbring

articles/load-balancer/media/tutorial-gateway-portal/vm-nic-gw-lb.png

@@ -226,7 +226,7 @@ In this section, you'll create the configuration and deploy the gateway load bal
     | IP Version | Select **IPv4** or **IPv6** depending on your requirements. |
     | Frontend IP address | Select **MyFrontend**. |
     | Backend pool | Select **myBackendPool**. |
-    | Health probe | Select **Create new**. </br> In **Name**, enter **myHealthProbe**. </br> Select **HTTP** in **Protocol**. </br> Leave the rest of the defaults, and select **OK**. |
+    | Health probe | Select **Create new**. </br> In **Name**, enter **myHealthProbe**. </br> Select **TCP** in **Protocol**. </br> Leave the rest of the defaults, and select **OK**. |
     | Session persistence | Select **None**. |
 
     :::image type="content" source="./media/tutorial-gateway-portal/add-load-balancing-rule.png" alt-text="Screenshot of create load-balancing rule." border="true":::
@@ -237,10 +237,11 @@ In this section, you'll create the configuration and deploy the gateway load bal
 
 19. Select **Create**.
 
-## Add network virtual appliances to the Gateway Load Balancer backend pool
-Deploy NVAs through the Azure Marketplace. Once deployed, add the NVA virtual machines to the backend pool by navigating to the Backend pools tab of your Gateway Load Balancer.
+## Add network virtual appliances to the gateway load balancer backend pool
 
-## Chain load balancer frontend to gateway load balancer
+Deploy NVAs through the Azure Marketplace. Once deployed, add the NVA virtual machines to the backend pool by navigating to the backend pools tab of your gateway load balancer.
+
+## Chain load balancer frontend to the gateway load balancer
 
 In this example, you'll chain the frontend of a standard load balancer to the gateway load balancer. 
 
@@ -262,6 +263,30 @@ You'll add the frontend to the frontend IP of an existing load balancer in your
 
     :::image type="content" source="./media/tutorial-gateway-portal/select-gateway-load-balancer.png" alt-text="Screenshot of addition of gateway load balancer to frontend IP." border="true":::
 
+## Chain a VM NIC configuration to the gateway load balancer
+
+Instead of chaining a load balancer frontend to the gateway load balancer, you can chain a virtual machine's NIC configuration to the gateway load balancer. To chain the NIC configuration, add the configuration to the gateway load balancer frontend.
+
+> [!IMPORTANT]
+> A virtual machine must have a public IP address assigned before attempting to chain the NIC configuration to the frontend of the gateway load balancer.
+
+1. In the search box in the Azure portal, enter **Virtual machine**. In the search results, select **Virtual Machines**.
+
+2. In **Virtual machines**, select the virtual machine that you want to add to the gateway load balancer. In this example, the virtual machine is named **myVM1**.
+
+3. In the overview of the virtual machine, select **Networking** in **Settings**.
+
+4. In **Networking**, select the name of the network interface attached to the virtual machine. In this example, it's **myvm1229**.
+
+    :::image type="content" source="./media/tutorial-gateway-portal/vm-nic.png" alt-text="Screenshot of virtual machine networking overview." border="true":::
+
+5. In the network interface page, select **IP configurations** in **Settings**.
+
+6. Select **myFrontend** in the **Gateway Load balancer** pull-down box.
+
+    :::image type="content" source="./media/tutorial-gateway-portal/vm-nic-gw-lb.png" alt-text="Screenshot of nic IP configuration." border="true":::
+
+7. Select **Save**.
 
 ## Clean up resources