Check-MacAddress

Checks the given MAC address for validity

Script

param([string]$MAC = "")

function IsMACAddressValid { param([string]$mac)
	$RegEx = "^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})|([0-9A-Fa-f]{2}){6}$"
	if ($mac -match $RegEx) {
		return $true
	} else {
		return $false
	}
}

try {
	if ($MAC -eq "" ) {
		$MAC = read-host "Enter MAC address to validate"
	}
	if (IsMACAddressValid $MAC) {
		"? MAC address $MAC is valid"
		exit 0 # success
	} else {
		write-warning "Invalid MAC address: $MAC"
		exit 1
	}
} catch {
	"?? ERROR: $($Error[0]) (script line $($_.InvocationInfo.ScriptLineNumber))"
	exit 1
}

Customize

MAC string

Specifies the MAC address to check