disable the VM from obtaining a dynamic IP address from the DHCP service in Azure and have it use my own dhcp service on another azure vm

NEfron 0

I configured a vm with windows server to be a DHCP server, but I can't find a way to use it. The other VMs on my network use the azure DHCP with the IP 168.63.129.16. Is it possible to change it?

KapilAnanth-MSFT 39,461 Reputation points Microsoft Employee

2023-11-21T10:11:28.9466667+00:00

@NEfron

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

As mentioned by AdamZachary, this is currently not feasible and is documented in Can I deploy a DHCP server in a virtual network?.

Azure virtual networks provide DHCP service and DNS to VMs and client/server DHCP (source port UDP/68, destination port UDP/67) not supported in a virtual network. You can't deploy your own DHCP service to receive and provide unicast or broadcast client/server DHCP traffic for endpoints inside a virtual network. Deploying a DHCP server VM with the intent to receive unicast DHCP relay (source port UDP/67, destination port UDP/67) traffic is also an unsupported scenario

Thanks,

Kapil

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KapilAnanth-MSFT 39,461 Reputation points Microsoft Employee

2023-11-22T09:42:59.1466667+00:00

@NEfron

Reaching out to check if there are any questions on this.

Please let us know if we can be of any further assistance here.

Thanks,

Kapil

Please Accept an answer if correct.

Original posters help the community find answers faster by identifying the correct answer.
KapilAnanth-MSFT 39,461 Reputation points Microsoft Employee

2023-11-24T10:29:54.71+00:00

@NEfron

Just checking in to see if the below answer helped. If this answers your query, please don’t forget to click "Accept the answer" and Up-Vote for the same, which might be beneficial to other community members reading this thread. And, if you have any further query do let us know.

Thanks,

Kapil

1 answer

Adam Zachary 2,881 Reputation points

2023-11-20T19:43:18.2933333+00:00
Using Custom DHCP on Azure VMs is Unsupported by Microsoft: Running a DHCP service on an Azure VM is not officially supported by Microsoft.

However, you can change the NIC settings "IP Configurations" from "Dynamic" to "Static".

If you're creating Virtual Machines using templates or scripts, you can choose you IP configurations to static and choose the relevant configuration.

If you're creating VMs from the Azure Portal, you can;

Navigate to your VM: Search for and select "Virtual machine".

Select VM: Choose the specific VM (e.g., "myVM") from the list.

Open Networking Settings: On the VM page, under "Settings," select "Networking."

Access Network Interface: Select the network interface name listed next to "Network interface."

Modify IP Configurations: Under "Settings" in the Network interface page, select "IP configurations."

Change Assignment to Static: In "IP configurations," choose the relevant configuration (e.g., "ipconfig1"). Under "Assignment," select "Static" and, if desired, change the private IP address.

Save Changes: Save the new settings.

Hope this helps!
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Adam Zachary 2,881 Reputation points

2023-11-20T20:27:03.6+00:00

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disable the VM from obtaining a dynamic IP address from the DHCP service in Azure and have it use my own dhcp service on another azure vm

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