Difference between "RenewDHCPLease()" and "IPConfig /renew"? - powershell

Question

I am using RenewDHCPLease() to renew the IP address of the system.
What is the exact difference between RenewDHCPLease() and ipconfig /renew?
Which one is better to use in Powershell?
Is it necessary to use ReleaseDHCPLease() before RenewDHCPLease()? If so why?
Below is my code:
try {
$ips = Get-WmiObject -Class Win32_NetworkAdapterConfiguration | Where { $_.IpEnabled -eq $true -and $_.DhcpEnabled -eq $true} -ErrorAction Stop
if (!$ips) {
Write-Output "`nDHCP is not Enabled on this system"
Exit
}
foreach ($ip in $ips) {
Write-Output "`nRenewing IP Addresses"
$ip.RenewDHCPLease() | Out-Null
if ($?) {
Write-Output "IP address has been renewed for this system"
}
else {
Write-Error "IP Address Could not be renewed"
}
}
}
catch {
$_.Exception.Message
}

Answer 1

ReleaseDHCPLease releases the IP address bound to a specific DHCP enabled network adapter
RenewDHCPLease Renews the IP address on a specific DHCP enabled network adapter
There is no need to use ReleaseDHCPLease before RenewDHCPLease since the old address is released and a new one is automatically acquired when using RenewDHCPLease
Get-WmiObject Win32_NetworkAdapterConfiguration -Filter 'IpEnabled=True AND DhcpEnabled=True' | Foreach-Object{
$_.RenewDHCPLease()
}
You could also use the RenewDHCPLeaseAll method to renew them all at once. Hope this helps :)