Add the hint to suggest users use the standard public IP when creatin…

…g VM

src/azure-cli/azure/cli/command_modules/vm/custom.py

@@ -751,6 +751,19 @@ def create_vm(cmd, vm_name, resource_group_name, image=None, size='Standard_DS1_
                                                                 build_vm_windows_log_analytics_workspace_agent)
     from azure.cli.command_modules.vm._vm_utils import ArmTemplateBuilder20190401
     from msrestazure.tools import resource_id, is_valid_resource_id, parse_resource_id
+    from azure.cli.core.profiles import AZURE_API_PROFILES
+
+    # In the latest profile and the profiles that use the same api-version as latest profile,
+    # the default public IP used for VM creation will be expected to be changed from Basic to Standard.
+    # In order to avoid breaking change which has a big impact on users,
+    # we use the hint to guide users to use Standard public IP to create VM in the first stage.
+    api_version_for_latest_profile = AZURE_API_PROFILES['latest'][ResourceType.MGMT_COMPUTE].default_api_version
+    if public_ip_sku is None and cmd.supported_api_version(ResourceType.MGMT_COMPUTE,
+                                                           min_api=api_version_for_latest_profile):
+        logger.warning(
+            'It is recommended to use parameter "--public-ip-sku Standard" to create new VM with Standard public IP. '
+            'Please note that the default public IP used for VM creation will be changed from Basic to Standard '
+            'in the future.')
 
     subscription_id = get_subscription_id(cmd.cli_ctx)