DHCP – Get a List of Scopes and Scope Options from 2012 R2 DHCP Server

#
$ListofScopesandTheirOptions = $Null
$PrimaryDHCPServer = "2012-dhcp1"
$SecondaryDHCPServer = "2012-dhcp2"
 
#Get all the scopes in the Primary Server
$Scopes = Get-DhcpServerv4Scope -ComputerName $PrimaryDHCPServer
 
#For all scopes in the primary server, get the scope options and add them to $LIstofSCopesandTheirOptions 
foreach ($Scope in $Scopes)
{
$LIstofSCopesandTheirOptions += Get-DHCPServerv4OptionValue -ComputerName $PrimaryDHCPServer -ScopeID $Scope.ScopeId |select @{label=”DHCPServer”; Expression= {$PrimaryDHCPServer}},@{label=”ScopeID”; Expression= {$Scope.ScopeId}},@{label=”ScopeName”; Expression= {$Scope.Name}},*
}
 
#Get all the scopes in the Secondary Server
$Scopes = Get-DhcpServerv4Scope -ComputerName $SecondaryDHCPServer
 
#For all scopes in the secondary server, get the scope options and add them to $LIstofSCopesandTheirOptions 
foreach ($Scope in $Scopes)
{
$LIstofSCopesandTheirOptions += Get-DHCPServerv4OptionValue -ComputerName $PrimaryDHCPServer -ScopeID $Scope.ScopeId |select @{label=”DHCPServer”; Expression= {$PrimaryDHCPServer}},@{label=”ScopeID”; Expression= {$Scope.ScopeId}},@{label=”ScopeName”; Expression= {$Scope.Name}},*
}
 
#Now we have them all, output them
$LIstofSCopesandTheirOptions |out-gridview
#

3 thoughts on “DHCP – Get a List of Scopes and Scope Options from 2012 R2 DHCP Server”

1. Pingback: Powershell - add a Column ,Field, Property to an object | BritV8

2. Made a small alteration to get all DHCP Info in the domain

   # Find all DHCP Server in Domain
   $Servers = netsh dhcp show server
   $list=@()
   foreach ($server in $servers)
   {
   if($server.indexof(“[“) -gt 0)
   {
   $list+=$server.substring($server.indexof(“[“)+1,$server.indexof(“]”)-1-$server.indexof(“[“))
   }
   }

   #
   $ListofScopesandTheirOptions = $Null

   foreach ($DHCPServer in $List)
   {
   if (Test-Connection -BufferSize 32 -Count 1 -ComputerName $dhcpserver -Quiet)
   {
   $ErrorActionPreference = “silentlycontinue”
   $Scopes = Get-DhcpServerv4Scope -ComputerName $DHCPServer
   #For all scopes in the primary server, get the scope options and add them to $LIstofSCopesandTheirOptions
   foreach ($Scope in $Scopes)
   {
   $LIstofSCopesandTheirOptions += Get-DHCPServerv4OptionValue -ComputerName $DHCPServer -ScopeID $Scope.ScopeId |select @{label=”DHCPServer”; Expression= {$DHCPServer}},@{label=”ScopeID”; Expression= {$Scope.ScopeId}},@{label=”ScopeName”; Expression= {$Scope.Name}},*
   }
   $ErrorActionPreference = “continue”
   }
   }

   #Now we have them all, output them
   $LIstofSCopesandTheirOptions |out-gridview
   #

3. I dared to enhance it even further. Not using netsh to get all DHCP servers but rather using PS. Furthermore, getting also server specific options and not only scope specific options. Also modified the script so that export-csv will correctly show the values. Later will add parallel execution to speed things up.

   # Find all DHCP Server in Domain
   $DhcpServers = Get-DhcpServerInDC

   foreach ($DHCPServer in $DhcpServers.DnsName){
   if (Test-Connection -BufferSize 32 -Count 1 -ComputerName $dhcpserver -Quiet){
   $ErrorActionPreference = “SilentlyContinue”
   $Scopes = Get-DhcpServerv4Scope -ComputerName $DHCPServer
   #For all scopes in the DHCP server, get the scope options and add them to $LIstofSCopesandTheirOptions
   foreach ($Scope in $Scopes){
   $LIstofSCopesandTheirOptions += Get-DHCPServerv4OptionValue -ComputerName $DHCPServer -ScopeID $Scope.ScopeId | Select-Object @{label=”DHCPServer”; Expression= {$DHCPServer}},@{label=”ScopeID”; Expression= {$Scope.ScopeId}},@{label=”ScopeName”; Expression= {$Scope.Name}},@{Name=’Value’;Expression={[string]::join(“;”, ($_.Value))}},*
   }
   $LIstofSCopesandTheirOptions += Get-DHCPServerv4OptionValue -ComputerName $DHCPServer | Select-Object @{label=”DHCPServer”; Expression= {$DHCPServer}},@{Name=’Value’;Expression={[string]::join(“;”, ($_.Value))}},*
   $ErrorActionPreference = “Continue”
   }
   }

   #Now we have them all, output them
   $LIstofSCopesandTheirOptions | Export-Csv -Path D:\EAADM\atrubajda\DhcpOptionsReport.csv -Force
   #$ListofScopesandTheirOptions | Out-GridView
   #

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