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Is it the only domain controller/DNS server or do you have more than one (which you should)?<br>Why do you need to delete and reinstall?
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Is it the only domain controller/DNS server or do you have more than one (which you should)?
Why do you need to delete and reinstall?

Network Administrator

DP230

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I would install a secondary domain controller w/ the DNS role on it, then promote it to your Primary Domain Controller (PDC). If you only have one and delete it, it's going to be difficult/impossible to correct.
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I would install a secondary domain controller w/ the DNS role on it, then promote it to your Primary Domain Controller (PDC). If you only have one and delete it, it's going to be difficult/impossible to correct.

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Yes, the problem is I could not access the DNS server. It said that <em>"There are currently no logon servers are available to service the logon request ".</em><br><br>The only problem is backup Veeam is relied on that DNS server to do its jobs. vSphere is still running.
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Yes, the problem is I could not access the DNS server. It said that "There are currently no logon servers are available to service the logon request ".

The only problem is backup Veeam is relied on that DNS server to do its jobs. vSphere is still running.

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That's normally a sign of issues with Active Directory or DNS.<br />
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Check your AD logs.<br />
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Can you login on a Windows workstation but if your vCenter Server is using DNS, it will not be able to uase FQDN to contact ESXI hosts, if you are using FQDNs and you should be.<br />
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If you are using IP Addresses, then....
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That's normally a sign of issues with Active Directory or DNS.

Check your AD logs.

Can you login on a Windows workstation but if your vCenter Server is using DNS, it will not be able to uase FQDN to contact ESXI hosts, if you are using FQDNs and you should be.

If you are using IP Addresses, then....

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Hi, after reinstalled the AD/DNS, we started the vcenter GUI and it run normally, except that the ESXi said "Host IP address conflict alarm" and reboot required.<br><br>Can you please suggest?
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Hi, after reinstalled the AD/DNS, we started the vcenter GUI and it run normally, except that the ESXi said "Host IP address conflict alarm" and reboot required.

Can you please suggest?

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Originally you asked<br />

<blockquote>
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If so, is there any impact to the system?
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<br />
My Answer <br />
<br />

<blockquote>
Answer - Yes there is an impact, if you use those DNS servers for your vSphere Infrastructure!!!!
</blockquote>
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I think this would be better posted as &nbsp;a new question - Title -<br />
<br />
&quot;&nbsp;ESXi said &quot;Host IP address conflict alarm&quot; and reboot required. &quot;
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Originally you asked


> If so, is there any impact to the system?


My Answer



> Answer - Yes there is an impact, if you use those DNS servers for your vSphere Infrastructure!!!!


I think this would be better posted as  a new question - Title -

" ESXi said "Host IP address conflict alarm" and reboot required. "

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<div class="content wysiwyg-content fr-view">
Dear Experts, is this possible to delete and reinstall the AD/DNS server of vSphere environment? If so, is there any impact to the system?<br><br>
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Dear Experts, is this possible to delete and reinstall the AD/DNS server of vSphere environment? If so, is there any impact to the system?

Reinstall of AD/DNS server in vSphere environment

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.

Virtualization

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.