ASR Failover

Question

Hello,

Today i test to failover my ASR and want to know about below queries:

1. How we can prevent created VM to be register to the DNS because with NIC up and running this VM will register to the DNS server and try to register to the Active Directory.
2. When ASR create VM the VM SKU is B2ms, this SKU is automatically selected by Azure or we can select manually?

Answer 1

Hi @Handian Sudianto

Welcome to Microsoft Q&A Forum, thank you for posting your query here!

1. How can we prevent created VM to be register to the DNS because with NIC up and running this VM will register to the DNS server and try to register to the Active Directory?

Reference Microsoft Document:
https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/unwanted-nic-registered-dns-mulithomed-dc

1. Preventing a VM from Registering in DNS

To prevent a VM from automatically registering in DNS or attempting to register with Active Directory, you can configure the network adapter settings on the VM to disable DNS registration.

For Windows VMs:

• Open Network and Sharing Center > Change adapter settings.
• Right-click the network adapter > Properties.
• Select Internet Protocol Version 4 (TCP/IPv4) > Properties > Advanced > DNS tab.
• Uncheck Register this connection's addresses in DNS and click OK.
• Alternatively, set Group Policy to disable DNS registration:
  • Go to Computer Configuration > Administrative Templates > Network > DNS Client. Enable Dynamic Update and set it to Disabled. 2.Selecting the VM SKU for Azure Site Recovery (ASR)

In Azure Site Recovery (ASR), the VM SKU for the failover VM, such as B2ms, is selected by default based on the source VM's configuration. However, you can manually specify a different target SKU to match your performance or cost preferences.

To customize the target VM size:

• In ASR, go to the Replication settings of the VM.
• Under Compute and Network settings, choose the target size for the failover VM.
• You can pick any compatible SKU that meets your needs, as long as it's available in the target region.

Please let us know if you have any further queries. I’m happy to assist you further.