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bcdady/Get-DHCPadapters.ps1

Created May 1, 2015 21:01
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PowerShell One-Liner: Enumerate all DHCP enabled Network Adapters via WMI / CIM, using an embedded CIM query as the -Filter
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Get-DHCPadapters.ps1
# Step 1, filter network adapters to those that are IP & DHCP enabled
# - this can only be done with the Win32_NetworkAdapterConfiguration class:
Get-CimInstance -ClassName Win32_NetworkAdapterConfiguration -Filter 'IpEnabled=True AND DhcpEnabled=True'
# To get a unique handle to any/all network adapters matching the filtered query, retrieve only their Index propery:
(Get-CimInstance -ClassName Win32_NetworkAdapterConfiguration -Filter 'IpEnabled=True AND DhcpEnabled=True').Index
# Using the Index property, enumerate objects in the Win32_NetworkAdapter class, with the same Index (aka DeviceID) property:
# - notice the prior Get-CimInstance query gets wrapped in another $(), to force returning only the resulting value into this Filter statement
# - I added | Format-List, because the default Table formatted results truncated the value of the .Name property
Get-CimInstance -ClassName Win32_NetworkAdapter -Filter "Index=$((Get-CimInstance -ClassName Win32_NetworkAdapterConfiguration -Filter 'IpEnabled=True AND DhcpEnabled=True').Index)" | Format-List
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