def get_config_interfaces_name_by_type(config_interfaces, type_str):
    """
    Extract interface names matching specific type from Interface config
    :param config_interfaces: Interfaces config dict
    :param type_str: Type string to match
    :return: List of Interface names matching type_str
    """
    interface_name_list = []
    for name, config_interface in config_interfaces.items():
        if config_interface.get('type') == type_str:
            interface_name_list.append(name)
    return interface_name_list
