Find-IpamFreeSubnet

Finds one or more free IP subnets in a specified IP block.

Syntax

Find-IpamFreeSubnet
    [-InputObject] <CimInstance>
    [-SubnetPrefix] <UInt32>
    [[-NumberOfSubnets] <UInt32>]
    [-CimSession <CimSession[]>]
    [-ThrottleLimit <Int32>]
    [-AsJob]
    [<CommonParameters>]

Description

The Find-IpamFreeSubnet cmdlet finds available free subnets in the IP Address Management (IPAM) database in a specified IP block. The IP block within which free IP subnet is to be searched is passed in InputObject parameter.

Examples

Example 1: Find free subnets with a specified subnet prefix

PS C:\> $IPAMBlock= Get-IpamBlock -NetworkId 10.1.0.0/16 -StartIPAddress 10.1.0.0 -EndIPAddress 10.1.255.255
PS C:\> Find-IpamFreeSubnet -InputObject $IPAMBlock -SubnetPrefix 24

This first command gets all IP addresses from network ID 10.1.0.0/16 with a specific range of IP addresses and stores the result in the variable named $IPAMBlock. The second command then finds all the free subnets that have a subnet prefix of 24 that is contained in the variable named $IPAMBlock.

Required Parameters

-InputObject

Specifies the input to this cmdlet. You can use this parameter, or you can pipe the input to this cmdlet.

Type:CimInstance
Position:1
Default value:None
Accept pipeline input:True (ByValue)
Accept wildcard characters:False
-SubnetPrefix

Specifies the prefix for the subnet to be returned. The prefix is an integer value indicating the number of bits set in a subnet mask.

The subnet prefix tells you the number of IP addresses available on that subnet. For instance, a subnet with a prefix value of 24 has 256 IP addresses.

Type:UInt32
Position:2
Default value:None
Accept pipeline input:False
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
-NumberOfSubnets

Specifies the number of free subnets to be returned.

Type:UInt32
Position:3
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 PowerShellĀ® 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