Added a new article for zone to zone DR and made edits in other articles 2

Author: sideeksh

articles/site-recovery/azure-to-azure-how-to-enable-zone-to-zone-dr.md

@@ -10,16 +10,16 @@ ms.author: sideeksh
 
 ---
 
-# Enable Zone to Zone Disaster Recovery for Azure Virtual Machines
+# Enable Zone to Zone Disaster Recovery for Azure virtual machines
 
 This article describes how to replicate, failover, and failback Azure virtual machines from one Availability Zone to another within the same Azure region.
 
 >[!NOTE]
 >
-> 1. Site Recovery currently does not support Recovery Plans for Zone to Zone Disaster Recovery. This support is coming soon.
-> 2. Support for Zone to Zone disaster recovery is currently limited to two regions: Southeast Asia and UK South. Support for other regions that have zones is coming soon. 
+>- Site Recovery currently does not support Recovery Plans for Zone to Zone Disaster Recovery. 
+>- Support for Zone to Zone disaster recovery is currently limited to two regions: Southeast Asia and UK South.  
 
-Site Recovery service contributes to your business continuity and disaster recovery (BCDR) strategy by keeping your business apps up and running, during planned and unplanned outages. It is the recommended Disaster Recovery option to keep your applications up and running if there are regional outages.
+Site Recovery service contributes to your business continuity and disaster recovery strategy by keeping your business apps up and running, during planned and unplanned outages. It is the recommended Disaster Recovery option to keep your applications up and running if there are regional outages.
 
 Availability Zones are unique physical locations within an Azure region. Each zone has one or more datacenters. 
 
@@ -29,33 +29,33 @@ Typically, Availability Zones are used to deploy VMs in a High Availability conf
 
 However, in some scenarios, Availability Zones can be leveraged for Disaster Recovery:
 
-1. Many customers who had a metro Disaster Recovery strategy while hosting applications on premise sometimes look to mimic this strategy once they migrate applications over to Azure. These customers acknowledge the fact that metro Disaster Recovery strategy may not work in case of a large-scale physical disaster and accept this risk. For such customers, Zone to Zone Disaster Recovery can be used as a Disaster Recovery option.
+- Many customers who had a metro Disaster Recovery strategy while hosting applications on premise sometimes look to mimic this strategy once they migrate applications over to Azure. These customers acknowledge the fact that metro Disaster Recovery strategy may not work in case of a large-scale physical disaster and accept this risk. For such customers, Zone to Zone Disaster Recovery can be used as a Disaster Recovery option.
 
-2. Many other customers have complicated networking infrastructure and do not wish to recreate it in a secondary region due to the associated cost and complexity. Zone to Zone Disaster Recovery reduces complexity as it leverages redundant networking concepts across Availability Zones making configuration much simpler. Such customers prefer simplicity and can also use Availability Zones for Disaster Recovery.
+- Many other customers have complicated networking infrastructure and do not wish to recreate it in a secondary region due to the associated cost and complexity. Zone to Zone Disaster Recovery reduces complexity as it leverages redundant networking concepts across Availability Zones making configuration much simpler. Such customers prefer simplicity and can also use Availability Zones for Disaster Recovery.
 
-3. In some regions that do not have a paired region within the same legal jurisdiction (for example, Southeast Asia), Zone to Zone Disaster Recovery can serve as the de-facto Disaster Recovery solution as it helps ensure legal compliance, since your applications and data do not cross national boundaries. 
+- In some regions that do not have a paired region within the same legal jurisdiction (for example, Southeast Asia), Zone to Zone Disaster Recovery can serve as the de-facto Disaster Recovery solution as it helps ensure legal compliance, since your applications and data do not cross national boundaries. 
 
-4. Zone to Zone Disaster Recovery implies replication of data across shorter distances when compared with Azure to Azure Disaster Recovery and therefore, you may see lower latency and consequently lower RPO.
+- Zone to Zone Disaster Recovery implies replication of data across shorter distances when compared with Azure to Azure Disaster Recovery and therefore, you may see lower latency and consequently lower RPO.
 
 While these are strong advantages, there is a possibility that Zone to Zone Disaster Recovery may fall short of resilience requirements in the event of a region-wide natural disaster.
 
 ## Networking for Zone to Zone Disaster Recovery
 
 As mentioned above, Zone to Zone Disaster Recovery reduces complexity as it leverages redundant networking concepts across Availability Zones making configuration much simpler. The behavior of networking components in the Zone to Zone Disaster Recovery scenario is outlined below: 
 
-1. Virtual Network: You may use the same virtual network as the source network for actual failovers. Use a different virtual network to the source virtual network for test failovers.
+- Virtual Network: You may use the same virtual network as the source network for actual failovers. Use a different virtual network to the source virtual network for test failovers.
 
-2. Subnet: Failover into the same subnet is supported.
+- Subnet: Failover into the same subnet is supported.
 
-3. Private IP address: If you are using static IP addresses, you can use the same IPs in the target zone if you choose to configure them in such a manner.
+- Private IP address: If you are using static IP addresses, you can use the same IPs in the target zone if you choose to configure them in such a manner.
 
-4. Accelerated Networking: Similar to Azure to Azure Disaster Recovery, you may enable Accelerated Networking if the VM SKU supports it.
+- Accelerated Networking: Similar to Azure to Azure Disaster Recovery, you may enable Accelerated Networking if the VM SKU supports it.
 
-5. Public IP address: You can attach a previously created standard public IP address in the same region to the target VM. Basic public IP addresses do not support Availability Zone related scenarios.
+- Public IP address: You can attach a previously created standard public IP address in the same region to the target VM. Basic public IP addresses do not support Availability Zone related scenarios.
 
-6. Load balancer: Standard load balancer is a regional resource and therefore the target VM can be attached to the backend pool of the same load balancer. A new load balancer is not required.
+- Load balancer: Standard load balancer is a regional resource and therefore the target VM can be attached to the backend pool of the same load balancer. A new load balancer is not required.
 
-7. Network Security Group: You may use the same network security groups as applied to the source VM.
+- Network Security Group: You may use the same network security groups as applied to the source VM.
 
 ## Pre-requisites
 
@@ -88,15 +88,15 @@ Login to the Azure portal.
 
 3. As shown below, in the Basics tab, select ‘Yes’ for ‘Disaster Recovery between Availability Zones?’
 
-    ![Basic Settings page](./media/azure-to-azure-how-to-enable-zone-to-zone-dr/zone-to-zone-basic-settings-blade.png)
+    ![Basic Settings page](./media/azure-to-azure-how-to-enable-zone-to-zone-dr/zonal-dr-basic-settings-blade.png)
 
 4. If you accept all defaults, click ‘Review + Start replication’ followed by ‘Start replication’.
 
 5. If you want to make changes to the replication settings, click on ‘Next: Advanced settings’.
 
-6. Change the settings away from default wherever appropriate. For users of Azure to Azure DR, this page might seem familiar. More details on the options presented on this blade can be found [here](https://docs.microsoft.com/azure/site-recovery/azure-to-azure-tutorial-enable-replication)
+6. Change the settings away from default wherever appropriate. For users of Azure to Azure Disaster Recovery, this page might seem familiar. More details on the options presented on this blade can be found [here](https://docs.microsoft.com/azure/site-recovery/azure-to-azure-tutorial-enable-replication)
 
-    ![Advanced Settings page](./media/azure-to-azure-how-to-enable-zone-to-zone-dr/zone-to-zone-advanced-settings-blade.png)
+    ![Advanced Settings page](./media/azure-to-azure-how-to-enable-zone-to-zone-dr/zonal-dr-advanced-settings-blade.png)
 
 7. Click on ‘Next: Review + Start replication’ and then ‘Start replication’.
 
@@ -112,13 +112,13 @@ The RTO SLA is the same as that for Site Recovery overall. We promise RTO <= 2 h
 The Site Recovery team and Azure capacity management team plan for sufficient infrastructure capacity. When you start a failover, the teams also help ensure VM instances that are protected by Site Recovery will deploy to the target zone.
 
 4. Which operating systems are supported?
-Zone to Zone DR supports the same operating systems as Azure to Azure DR. Refer to the support matrix [here](https://docs.microsoft.com/azure/site-recovery/azure-to-azure-support-matrix).
+Zone to Zone Disaster Recovery supports the same operating systems as Azure to Azure Disaster Recovery. Refer to the support matrix [here](https://docs.microsoft.com/azure/site-recovery/azure-to-azure-support-matrix).
 
 ## Next steps
 
-The steps that need to be followed to run a DR drill, fail over, re-protect, and failback are the same as the steps in Azure to Azure DR scenario.
+The steps that need to be followed to run a Disaster Recovery drill, fail over, re-protect, and failback are the same as the steps in Azure to Azure Disaster Recovery scenario.
 
-To perform a DR drill, please follow the steps outlined [here](https://docs.microsoft.com/azure/site-recovery/azure-to-azure-tutorial-dr-drill).
+To perform a Disaster Recovery drill, please follow the steps outlined [here](https://docs.microsoft.com/azure/site-recovery/azure-to-azure-tutorial-dr-drill).
 
 To perform a fail over and re-protect VMs in the secondary zone, follow the steps outlined [here](https://docs.microsoft.com/azure/site-recovery/azure-to-azure-tutorial-failover-failback).