DFS Namespace Server Role on Azure VM configured failover cluster failing IP addressing issue

Sumit Chawla 11 Reputation points Microsoft Employee
2021-07-12T05:07:43.827+00:00

I am trying a POC to have high available standalone DFS namespace server. For this, I have configured, 2 VM’s on Azure with a shared premium disk and provisioned a cluster. Both the VM’s are on-prem domain joined through Express Route.
The Ip address of both the VM’s lie in the same subnet(x.x.x.45. and x.x.x.47). I have used windows server 2019 so cluster uses distributed server name and takes the Ip address of the active VM in the cluster. When I configure the DFS Namespace Server Role on this cluster, it provisions a Server (Network Name); dfs-test is the name in my case. I assign a static Ip address to this server name (dfs-test) and the Ip address(x.x.x.44) also belongs to the same subnet. However, I see corresponding to this action inside VM, a network interface is created in the Azure and it is not attached to any machine. Also, I see that a computer object is created in AD for dfs-test as well an entry in DNS is created in corp DNS server for dfs-test pointing to x.x.x.44. The issue is I want to access this location on network \dfs-test (\x.x.x.4) which is not happening. I am anticipating since this IP address is not assigned to any machine, it is not routed anywhere. The ping test also fails from other machines in the same domain. Any idea, what is the missing configuration here which allows me to access this DFS role (dfs-test) with Ip address x.x.x.44 over the network.

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  1. JiayaoZhu 3,911 Reputation points
    2021-07-12T09:37:54.72+00:00

    Hi,

    Thanks for posting on our forum!

    Firstly, I need to identify whether your issue is more related with Azure platform or with Windows OS platform. In this case, I need to gain a deeper insight of your network configuration, both in Azure and in Windows. Like where do you set your static ip (x.x.x.44)? In Windows OS or in Azure. If it is in Windows, it is normal that you cannot see it in Azure. Anyway, please give me the screenshots for network configuration for DFS and in Azure respectivelly and the screenshots for anything that you think is weird, like:

    "Also, I see that a computer object is created in AD for dfs-test as well an entry in DNS is created in corp DNS server for dfs-test pointing to x.x.x.44. The issue is I want to access this location on network \dfs-test (\x.x.x.4) which is not happening."

    Last but not least, would you please repeat your demand? Which do you want us to help you solve with?

    Thanks for your support and understanding! The more useful information we can get, the more efficient help you can receive.

    BR,
    Joan

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  2. Diskan, Cosmo B 0 Reputation points
    2023-01-21T03:35:06.42+00:00

    @Sumit Chalwa

    Did you ever figure this out? I have an identical issue.

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  3. Dave Cook 5 Reputation points
    2023-04-14T10:59:35.7866667+00:00

    @Sumit Chalma

    I am also about to start the config of a standalone failover cluster in Azure. I find there is little guidance but plenty of nice design schematics which are of little help without the guidance. Did you manage to sort this one out?

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