I had a requirement to be able set a custom SCCM Task Sequence variable to the value (IP address) of the DHCP server that had issued the IP address to the client . This meant that later in the Task Sequence I could re-use this value for other things, in this case it was to map a network drive, eg \\%DHCP_Server%\temp. I used a VB script to set this:
' Purpose: Set SCCM task sequence variable 'DHCP_Server' to the value of the DHCP server IP address
' Date: 06/12/2011
' Version: 1.0
strComputer = "."
' Create Task Sequence environment object
dim osd: set env = CreateObject("Microsoft.SMS.TSEnvironment")
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
' Find active network adapter
Set colAdapters = objWMIService.ExecQuery _
("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = True")
n = 1
For Each objAdapter in colAdapters
' Set variable in the Operating System Deployment environment
env("DHCP_Server") = objAdapter.DHCPServer
n = n + 1
Next
When you dump out the Task Sequence variables, you can then see it at the top of the list:
DHCP_Server=10.0.0.1
SMSTSDisableWow64Redirection=false
P0000012=file:VOL001:sources
WorkingDirectory=s:\
_SMSMediaGuid=2BB82B7E-0BE0-48D7-9AC2-3DE93F726D71
_SMSTSAdvertID=P00200F6
_SMSTSBootImageID=P000005F
_SMSTSBootMediaPackageID=P0000012
_SMSTSBootMediaSourceVersion=2
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