"RenewDHCPLease()“和"IPConfig /renew”之间的区别？

Question

我正在使用RenewDHCPLease()更新系统的IP地址。

1. RenewDHCPLease()和ipconfig /renew的确切区别是什么？
2. 哪个更适合在Powershell中使用？
3. 是否有必要在使用ReleaseDHCPLease()之前使用RenewDHCPLease()？如果是的话，为什么？

下面是我的代码：

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 释放绑定到特定DHCP启用网络适配器的IP地址。 RenewDHCPLease 更新特定DHCP启用的网络适配器上的IP地址。

没有必要在ReleaseDHCPLease之前使用RenewDHCPLease，因为旧地址被释放了，使用RenewDHCPLease时会自动获得一个新地址。

Get-WmiObject Win32_NetworkAdapterConfiguration -Filter 'IpEnabled=True AND DhcpEnabled=True' | Foreach-Object{
    $_.RenewDHCPLease() 
}

您还可以使用RenewDHCPLeaseAll方法一次性对它们进行更新。希望这会有所帮助:)