def _get_multicast_ip_range(network_profile):
    """
    Helper method to retrieve minimum and maximum multicast ip.

    :params network_profile: object of type network profile
    :returns: two strings representing minimum multicast ip and
              maximum multicast ip
    """
    # Assumption: ip range belongs to the same subnet
    # Assumption: ip range is already sorted
    return network_profile.multicast_ip_range.split('-')