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Windows Server 2012R2 DHCP issue

Serhii Kets 0 Reputation points
2023-02-28T08:20:25.2+00:00

Hi,

I noticed I have a problem with my DHCP service, which based on Windows Server 2012 R2. The problem is that almost no available ip addresses on scope 10.114.34.0. The dynamic pool of ip addresses is 10.114.34.128 - 10.114.34.191. Subnet mask is /24.

I used powershell to get list of free dynamic asigned ip addresses:

PS C:\Windows\system32> Get-DhcpServerv4FreeIPAddress -ComputerName dhcp-wnb.uwr.edu.pl -ScopeId 10.114.34.0 -NumAddress 100

WARNING: The requested number of free IP addresses could not be found.

10.114.34.183

10.114.34.185

Used leases listet below:

PS C:\Windows\system32> Get-DhcpServerv4Lease -ComputerName dhcp-wnb.uwr.edu.pl -ScopeId 10.114.34.0

IPAddress ScopeId ClientId HostName AddressState LeaseExpiryTime

--------- ------- -------- -------- ------------ ---------------

10.114.34.128 10.114.34.0 ***************** Galaxy-A53-5G.wnb... Active 2/28/2023 10:15:26 AM

10.114.34.129 10.114.34.0 ***************** M2006C3MNG-Redmi9... Active 2/28/2023 10:01:57 AM

10.114.34.130 10.114.34.0 ***************** Galaxy-A51.wnb.uw... Active 2/28/2023 9:47:09 AM

10.114.34.131 10.114.34.0 ***************** M2006C3MNG-Redmi9... Active 2/28/2023 9:46:12 AM

10.114.34.132 10.114.34.0 ***************** Active 2/28/2023 10:10:38 AM

10.114.34.133 10.114.34.0 ***************** Active 2/28/2023 9:52:30 AM

10.114.34.137 10.114.34.0 ***************** Galaxy-Note9.wnb.... Active 2/28/2023 10:10:19 AM

10.114.34.139 10.114.34.0 ***************** Galaxy-M52-5G.wnb... Active 2/28/2023 9:50:21 AM

10.114.34.140 10.114.34.0 ***************** DESKTOP-SDG5RH1.w... Active 2/28/2023 9:55:09 AM

10.114.34.141 10.114.34.0 ***************** DESKTOP-BS6INKC.w... Active 2/28/2023 10:03:58 AM

10.114.34.145 10.114.34.0 ***************** realme-X3-SuperZo... Active 2/28/2023 10:06:42 AM

10.114.34.149 10.114.34.0 ***************** Galaxy-A52s-5G.wn... Active 2/28/2023 9:45:59 AM

10.114.34.155 10.114.34.0 ***************** MacBook-Bozena.wn... Active 2/28/2023 9:54:23 AM

10.114.34.168 10.114.34.0 ***************** LAPTOP-C3FKMPQ2.w... Active 2/28/2023 10:15:45 AM

10.114.34.170 10.114.34.0 ***************** DESKTOP-O1GSISK.w... Active 2/28/2023 10:06:31 AM

10.114.34.175 10.114.34.0 ***************** Galaxy-J6.wnb.uwr... Active 2/28/2023 10:04:05 AM

10.114.34.178 10.114.34.0 ***************** DESKTOP-GUCSVPU.w... Active 2/28/2023 10:10:45 AM

Why in case of checking free ip addresses DHCP doesnt return addresses like 10.114.34.138, 10.114.34.142, 10.114.34.143, 10.114.34.144 and so on?

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