Question

1. Write power shell function/script to let the user know the state of ipv4 address on the computer (state can be static or dynamic IP). If it is static IP address, request user input if he/she wishes to change state to dynamic, if answer is “Y”, change ipv4 address to dynamic IP.
   If the current state is dynamic, ask the user if he/she wishes to change status to static IP, if user decides change the state to static, and request for the static IP address, net mask, DNS and default gateway; set the new information on ipv4 interface ass given.

Answer 1

To know whether the ip address is static or dynamic just run the following powershell script.

Get -WmiObject -Class Win32_NetworkAdapterConfiguration -Filter IPEnabled=TRUE -ComputerName.

This script will give the following details

DHCPEnabled : True or False

IPAddress: : {192.168.168.174,192.168.1.155,10.10.12.89, fe80::c994:2b82:e28c:b672}.

DefaultIPGateway , DNSDomain and ServiceName etc.

In these details if you found DHCPEnabled as "TRUE" then it is "Dynamic IP"

if you found DHCPEnabled as "FALSE" then it is "Static IP"

If you found DHCPEnabled as False then ask user whether he wants to change it to Dynamic using following script.

$toChange= Read-Host 'Enter Y to change it to Dynamic IP?'

PowerShell Script to change from StaticIP to DynamicIP

if ($toChange -eq 'Y'){

$NICs=Get -WMIObject Win32_NetworkAdapterConfiguration `

| where {$_.IPEnabled -eq "TRUE"}

Foreach($NIC in $NICs) {

$NIC.EnableDHCP()

$NIC.SetDNSServerSearchOrder()

}

}

PowerShell Script to change from DynamicIP to StaticIP:

$ipaddress= Read-Host 'Enter IPAddress'

$mask= Read-Host 'Enter Subnet Mask'

$gateWay=Read-Host 'Enter GateWay'

$dnsServer= Read-Host 'Enter DNSServers'

$NICs=Get -WMIObject Win32_NetworkAdapterConfiguration `

| where{$_.IPEnabled -eq "TRUE"}

Foreach($NIC in $NICs){

$NIC.EnableStatic($ipaddress,$mask)

$NIC.SetGateWays($gateWay)

$DNSServers=$dnsServer

$NIC.SetDNSServerSearchOrder($DNSServers)

$NIC.SetDynamicDNSRegistration("FALSE")

}