Get-​Dhcp​Serverv4​Free​IP​Address

Gets free IPv4 addresses from a specified scope.

Syntax

Get-DhcpServerv4FreeIPAddress
   [-ScopeId] <IPAddress>
   [[-NumAddress] <UInt32>]
   [-AsJob]
   [-CimSession <CimSession[]>]
   [-ComputerName <String>]
   [-EndAddress <IPAddress>]
   [-StartAddress <IPAddress>]
   [-ThrottleLimit <Int32>]
   [<CommonParameters>]

Description

This Get-DhcpServerv4FreeIPAddress cmdlet gets one or more free IP addresses from the specified scope.

If you specify the NumAddress parameter, the requested number of free IPv4 addresses are returned. If you do not specify the NumAddress parameter, a single free IP address is returned. The maximum number of free IP addresses returned is capped at 1024.

If you specify the StartAddress parameter and not the EndAddress parameter, the free IP addresses starting from the StartAddress parameter value through the end of the IP address range of the scope are returned.

If you specify the EndAddress parameter and not the StartAddress parameter, the free IP addresses starting from the start of the IP address range of the scope through the EndAddress parameter value are returned.

If you specify both the StartAddress and EndAddress parameters, the free IP addresses between the StartAddress and EndAddress parameter values are returned.

The exclusion address ranges, reservations, active, offered, and bad, or declined, leases are excluded while returning the free IP addresses.

The IP address ranges associated with a policy are included while returning the free IP addresses.

The IP addresses which are in expired, or doomed, state will be included while returning the free IP addresses.

If the requested number of free IP addresses could not be found, this cmdlet displays a warning.

Examples

Example 1: Get a free address

PS C:\> Get-DhcpServerv4FreeIPAddress -ComputerName "dhcpserver.contoso.com" -ScopeId 10.10.10.0

This example gets a free IPv4 addresses from the specified scope.

Example 2: Get ten free addresses

PS C:\> Get-DhcpServerv4FreeIPAddress -ComputerName "dhcpserver.contoso.com" -ScopeId 10.10.10.0 -NumAddress 10

This example gets a list of ten free IPv4 addresses from the specified scope.

Example 3: Get a free address from a range

PS C:\> Get-DhcpServerv4FreeIPAddress -ComputerName "dhcpserver.contoso.com" -ScopeId 10.10.10.0 -StartAddress 10.10.10.10 -EndAddress 10.10.10.50

This example gets a free IPv4 address from the specified scope in the IP address range from 10.10.10.10 through 10.10.10.50.

Required Parameters

-ScopeId

Specifies the scope identifier (ID), in IPv4 address format, from which one or more free IP addresses are requested.

Type:IPAddress
Position:1
Default value:None
Accept pipeline input:True (ByPropertyName)
Accept wildcard characters:False

Optional Parameters

-AsJob

Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete. The cmdlet immediately returns an object that represents the job and then displays the command prompt. You can continue to work in the session while the job completes. To manage the job, use the *-Job cmdlets. To get the job results, use the Receive-Job cmdlet. For more information about Windows PowerShell® background jobs, see about_Jobs.

Type:SwitchParameter
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-CimSession

Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.

Type:CimSession[]
Aliases:Session
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-ComputerName

Specifies the DNS name, or IPv4 or IPv6 address, of the target computer that runs the Dynamic Host Configuration Protocol (DHCP) server service.

Type:String
Aliases:Cn
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-EndAddress

Specifies the ending IP address of the range from which the free IP addresses are returned.

Type:IPAddress
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-NumAddress

Specifies the number of free IP addresses requested.

Type:UInt32
Position:2
Default value:1
Accept pipeline input:False
Accept wildcard characters:False
-StartAddress

Specifies the starting IP address of the range from which the free IP addresses are returned.

Type:IPAddress
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-ThrottleLimit

Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session or to the computer.

Type:Int32
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

Inputs

Microsoft.Management.Infrastructure.CimInstance#root/Microsoft/Windows/DHCP/DhcpServerv4Scope

The Microsoft.Management.Infrastructure.CimInstance object is a wrapper class that displays Windows Management Instrumentation (WMI) objects. The path after the pound sign (#) provides the namespace and class name for the underlying WMI object.

Outputs

System.String[]