How do I find the name of the DHCP server when I have a statically assigned IP address in a Windows environment?

Question

I work in an environment where we sometimes only have access to the servers and we always set up servers with static IPs. When I run our reports I need to check DHCP IP ranges and sometimes our documentation does not list the functions of all 12+ servers for a particular client. Normally we put them on the DC but not always.

How do I determine which server is acting as a DHCP server without logging into them all? Is there a simple command I'm not thinking of?

Possible duplicate of https://serverfault.com/q/171744/209089 — rda, Apr 17 '18 at 19:41
Possible duplicate of [Command line program to test DHCP service](https://serverfault.com/questions/171744/command-line-program-to-test-dhcp-service) — Andrew Schulman, Apr 18 '18 at 00:09
Not a duplicate, I'm not using Linux. Please give answers for a Windows environment. Added the Windows tag and updated question to be more clear. — naps1saps, Apr 18 '18 at 17:03
Are you trying to find "the DHCP server" or "the servers with DHCP assigned addresses"? — Clayton, Apr 19 '18 at 15:58
Name or IP of the DHCP server on the same network as the statically addressed server I'm on. — naps1saps, Apr 20 '18 at 20:03

score 1 · Answer 1 · answered Apr 19 '18 at 15:29

1

Is there any reason you don't just run wireshark and filter for DHCP traffic?

answered Apr 19 '18 at 15:29

McITGuy

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That would require installing software which we don't want to do on other people's servers. – naps1saps Jul 23 '20 at 18:54

naps1saps · Accepted Answer · 2018-04-18T17:05:24.820

I don't believe there is a simple command. I hope someone else can come up with something easier. However, a coworker working on automating these reports wrote a PS command that seems to work:

$searchbase = " **distinguishedName** "
Get-ADObject -SearchBase $searchbase -Filter "objectclass -eq 'dhcpclass' -AND Name -ne 'dhcproot'"

distinguishedName can be found in the attribute editor for the root (tree?) entry in AD.

Example: DomainName.local

$searchbase = "cn=configuration,DC=DomainName,DC=local"

It searches AD for an object with a DHCP class.

How do I find the name of the DHCP server when I have a statically assigned IP address in a Windows environment?

2 Answers2