Question:
I’m new to powershell and I’m trying to automate creating a DHCP reservation.
So far I’m able to get the IP address like so:
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$IP = ( GEt-VM -ComputerName $HVCOMPUTERNAME -VMName $HVNAME | Get-VMNetworkAdapter).IpAddresses[0] |
This returns a string like:
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192.0.2.1 |
However, the Add-DhcpServer4Resrvation cmdlet does not accept an ip address as a string. It requires the IP address be a ‘System.Net.IpAddress’
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Add-DhcpServerv4Reservation -ComputerName $DHCPServer -ScopeId $DHCPScope -IPAddress $IP -Client Id $MacAddress -Name $HVNAME Add-DhcpServerv4Reservation : Cannot process argument transformation on parameter 'IPAddress'. Cannot convert value " 10.254.130.104 " to type "System.Net.IPAddress". Error: "An invalid IP address was specified." At line:1 char:86 + ... ope -IPAddress $IP -ClientId $MacAddress -Name $HVNAME + ~~~ + CategoryInfo : InvalidData: (:) [Add-DhcpServerv4Reservation], ParameterBindingArgumentTransformationEx ception + FullyQualifiedErrorId : ParameterArgumentTransformationError,Add-DhcpServerv4Reservation |
How do you convert a string to a System,.Net.IPAddress?
According to this link, it should be easy like
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> [ipaddress]"192.0.2.1" |
However that doesn’t work.
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PS C:\Windows\system32> $FOO = [IPAddress]$IP Cannot convert value " 10.254.130.104 " to type "System.Net.IPAddress". Error: "An invalid IP address was specified." At line:1 char:1 + $FOO = [IPAddress]$IP + ~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidArgument: (:) [], RuntimeException + FullyQualifiedErrorId : InvalidCastParseTargetInvocation tworkAdapter) Format-List -Property *.254.13༁爼ሂÌGEt-VM -ComputerName $HVCOMPUTERNAME -VMName $HVNAME | Get-VMNetworkAdapter) | Format-List -Property * {༁牎ᐂÊGEt-VM -ComputerName $HVCOMPUTERNAME -VMName $HVNAME | Get-VMNetworkAdapter | Format-List -Property * ఁ牘ࠂÆ$IP = ( GEt-VM -ComputerName $HVCOMPUTERNAME -VMName $HVNAME | Gt-VMNex뿰bpte |
Related question
Powershell, get ip4v address of VM
Answer:
[IPAddress] Wont work if there are spaces in the string
Remove them with Trim()
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$IP = [IPAddress]$IP.Trim() |