Merge pull request #247535 from tysonfms/tysonfms-patch-1-5

Update container-instances-vnet.md

Author: prmerger-automator[bot]

articles/container-instances/container-instances-vnet.md

@@ -28,6 +28,9 @@ Examples in this article are formatted for the Bash shell. If you prefer another
 
 ## Deploy to new virtual network
 
+> [!NOTE]
+> If you are using  port 29 to have only 3 IP addresses, we recommend always to go one range above or below. For example, use port 28 so you can have at least 1 or more IP buffer per container group. By doing this, you can avoid containers in stuck, not able start or not able to stop states.
+
 To deploy to a new virtual network and have Azure create the network resources for you automatically, specify the following when you execute [az container create][az-container-create]:
 
 * Virtual network name