Merge pull request #243388 from flang-msft/fxl---Add-VNET-configuration-requirement-for-Redis-upgrade-

Fxl---add vnet configuration requirement for redis upgrade

Author: prmerger-automator[bot]

articles/azure-cache-for-redis/cache-how-to-upgrade.md

@@ -6,7 +6,7 @@ author: flang-msft
 ms.author: franlanglois
 ms.service: cache
 ms.topic: how-to
-ms.date: 12/15/2022
+ms.date: 06/29/2023
 ms.custom: template-how-to, devx-track-azurecli
 ---
 
@@ -33,7 +33,10 @@ For more information on how to export, see [Import and Export data in Azure Cach
 
 - When you upgrade a cache in the Basic tier, it's unavailable for several minutes and results in data loss.
 - Upgrading on geo-replicated cache isn't supported. You must manually unlink the cache instances before upgrading.
-- Upgrading a cache with a dependency on Cloud Services isn't supported. You should migrate your cache instance to Virtual Machine Scale Set before upgrading. For more information, see [Caches with a dependency on Cloud Services (classic)](./cache-faq.yml) for details on cloud services hosted caches.
+- Upgrading a cache with a dependency on Cloud Services isn't supported. You should migrate your cache instance to Virtual Machine Scale Set before upgrading.
+  - For more information, see [Caches with a dependency on Cloud Services (classic)](./cache-faq.yml) for details on cloud services hosted caches.
+- When trying to upgrade to Redis 6, your VNet must be configured in accord with the requirements. Your upgrade might fail or the cache might not function properly after the upgrade if not configured correctly.
+  - For more information on the VNet requirements, see [What are some common misconfiguration issues with Azure Cache for Redis and virtual networks](cache-how-to-premium-vnet.md#what-are-some-common-misconfiguration-issues-with-azure-cache-for-redis-and-virtual-networks).
 
 ### Check the version of a cache
 
@@ -49,15 +52,15 @@ Before you upgrade, check the Redis version of a cache by selecting **Properties
 
 1. If your cache instance is eligible to be upgraded, you should see the following blue banner. If you want to proceed, select the text in the banner.
 
-    :::image type="content" source="media/cache-how-to-upgrade/blue-banner-upgrade-cache.png" alt-text="Screenshot informing you that you can upgrade your cache to Redis 6 with additional features. Upgrading your cache instance cannot be reversed.":::
+    :::image type="content" source="media/cache-how-to-upgrade/blue-banner-upgrade-cache.png" alt-text="Screenshot informing you that you can upgrade your cache to Redis 6 with more features. Upgrading your cache instance can't be reversed.":::
 
 1. A dialog box displays a popup notifying you that upgrading is permanent and might cause a brief connection blip. Select **Yes** if you would like to upgrade your cache instance.
 
     :::image type="content" source="media/cache-how-to-upgrade/dialog-version-upgrade.png" alt-text="Screenshot showing a dialog with more information about upgrading your cache with Yes selected.":::
 
 1. To check on the status of the upgrade, navigate to **Overview**.
 
-    :::image type="content" source="media/cache-how-to-upgrade/upgrade-status.png" alt-text="Screenshot showing Overview in the Resource menu. Status shows cache is being upgraded."::: 
+    :::image type="content" source="media/cache-how-to-upgrade/upgrade-status.png" alt-text="Screenshot showing Overview in the Resource menu. Status shows cache is being upgraded.":::
 
 ## Upgrade using Azure CLI
 
@@ -73,7 +76,7 @@ To upgrade a cache from 4 to 6 using PowerShell, use the following command:
 
 ```powershell-interactive
 Set-AzRedisCache -Name "CacheName" -ResourceGroupName "ResourceGroupName" -RedisVersion "6"
-``` 
+```
 
 ## Next steps