def default_link_info_gen(default_link_delay, default_link_loss, default_link_bw):  
    """Generate the default link information
    Args:
        default_link_delay (float): Default delay for the link.
        default_link_loss (float): Default loss for the link.
        default_link_bw (float): Default bandwidth for the link.
    Returns:
        str: Default link infomation.
    Examples:
        The return can be "default_link_info: 1000, 5ms, 0, N/A, N/A"
    """

    return "default_link_info: {}, {}ms, {}, N/A, N/A".format(default_link_bw, default_link_delay, default_link_loss)