regex = re.compile( '^([0-9a-fA-F]{1,2}[:-]){5}[0-9a-fA-F]{1,2}$' )

	regexFormats = (

	error_message = _( 'This is not a valid MAC address. It must have 6 two digit hexadecimal numbers separated by \"-\" or \":\"' )

		'(([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2})', # linux format

		'(([0-9a-fA-F]{2}-){5}[0-9a-fA-F]{2})', # windows format

		'([0-9a-fA-F]{12})', # raw format

		'(([0-9a-fA-F]{4}.){2}[0-9a-fA-F]{4})', # cisco format

	)

	regex = re.compile( '^(' + '|'.join(regexFormats) + ')$' )

	error_message = _( 'This is not a valid MAC address.' )