{
    $OUT = "";
    return if ($InternalInterface{Name} eq "bond0");
    return unless $THIS_DEVICE =~ /^eth[01]$/;
    my $hwaddr = $is_internal ? 
        $InternalInterface{HWAddress}:
        $ExternalInterface{HWAddress};
    $OUT .= "HWADDR=$hwaddr" if $hwaddr;
}
