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# Changing IP on computers in a specific IP range

Posted on 2008-10-28
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Hi,

I'm trying to use a script to change the IP and the gateway on target computers based on an IP range. Attached is the script I made out of copy/paste from Microsoft scripts

This is in a testing environment. The IP range is small: 192.168.9.100, 192.168.101, 192.168.9.102, I just want to see how to make it work

The result is:
1. 192.168.9.100 - could not be reached - this is good, there is no IP like this
2. 192.168.9.101 - the scripts get stuck
3. the script actually changes the IP from 192.168.9.101 to 10.16.9.101, but it never reaches to check 192.168.9.102 and so on, so the script dies, no message, just stuck
4. for some reason the gateway doesn't get changed either - no clue why

I'm running this script on a server with 2 NICs, one NIC in 192.168.9.x and one NIC in 10.16.9.x range, so I can ping the destination computer both before changing the IP and after changing the IP

unfortunately, besides copy/paste, I don't know much scripting, so I need your help

I need to run this soon, in a production environment with about 200 servers and workstations, and changing the IPs manually is only a last resort

Thanks!
On Error Resume Next

strSubnet = "192.168.9."

strComputer = strSubnet & i

Set objShell = CreateObject("WScript.Shell")
strCommand = "%comspec% /c ping -n 2 -w 1000 " & strComputer & ""
Set objExecObject = objShell.Exec(strCommand)

Do While Not objExecObject.StdOut.AtEndOfStream
If Instr(strText, "Reply") > 0 Then

Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")

("Select * From Win32_NetworkAdapterConfiguration Where IPEnabled=True")

arrGateway = Array("10.16.9.1")
arrGatewayMetric = Array(1)

For Each objNetCard in colNetCards
objNetCard.SetGateways arrGateway, arrGatewayMetric
Next

If arrOctets(0) = "192" and arrOctets(1) = "168" Then
strNewAddress = "10.16." & arrOctets(2) & "." & arrOctets(3)
End If
Next
Next

Set objWMIService = GetObject _
("winmgmts:\\" & strComputer & "\root\cimv2")
Set colItems = objWMIService.ExecQuery _
("Select * From Win32_OperatingSystem")
For Each objItem in ColItems
Wscript.Echo strComputer & ": " & objItem.Caption
Next

Else
Wscript.Echo strComputer & " could not be reached."
End If
Loop
Next

0
Question by:sblanken
• 2

LVL 17

Expert Comment

ID: 22826428
Take off that on error resume next and see if it'll give you an error anywhere.
0

Author Comment

ID: 22826726
ok, so after I took out the first line (On error resume next), I got an error in the Gateway section

For Each objNetCard in colNetCards
objNetCard.SetGateways arrGateway, arrGatewayMetric
Next

it said: Object not a collection

So I changed Netcard with NetAdapter and this part worked, now the gateway part is OK

But it's still stuck in changing the IP part :(. That is it changes the IP but it doesn't go to the next IP in line :(

Thanks for the first hint though! :)
0

Accepted Solution

sblanken earned 0 total points
ID: 22827640
so in the end I went with psexec and a local vbs, like this

the BATCH file

rem @echo off
rem @for /L %a in (100,1,102) do @set server_name=192.168.9.%a& x:\IT\Scripts\IP.bat > x:\IT\Scripts\IP.log

net use y: /d
net use m: /d

net use y: \\sf-corp-it-02\software
net use m: \\%server_name%\c\$

set server_name
@ping 127.0.0.1 -n 2 -w 1000 > nul

copy /y y:\it\scripts\ip.vbs m:

Y:\Deployment\psexec.exe \\%server_name% -w c:\ cscript c:\ip.vbs

net use y: /d
net use m: /d

the VBS script

strComputer = "."

Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")

("Select * From Win32_NetworkAdapterConfiguration Where IPEnabled=True")

arrGateway = Array("10.16.9.1")
arrGatewayMetric = Array(1)

Next

If arrOctets(0) = "192" and arrOctets(1) = "168" Then
strNewAddress = "10.16." & arrOctets(2) & "." & arrOctets(3)
End If
Next
Next

And this does what I need. Takes some time cuz there is no ping control but it does the job

On the other hand the 'stuck' situation threw an error (after about 6 1/2 min) - i never waited that long in my previous attempts, but this time I was talking to someone and the error was

SWbemObjectEx: The remote procedure call failed.

SO I found this

http://www.windowsnetworking.com/articles_tutorials/Managing-Windows-Networks-Using-Scripts-Part7.html

and then I installed the latest updates from Microsoft on my testing server - hint from the article

Now the script doesn't get stuck, but it changes only the gateway not the IP. It doesn't throw any error, just doesn't change the IP. But I don't mind as long as I have the other method to change the IPs. I'll play with this some more, but for now I'm covered. I wanted to take some time to update this ticket for future reference for other users that need similar things. Thanks!

0

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