'To check whether VF is enabled or not.
:returns: boolean to indicate VF enabled and session information'

def is_vf_enabled(self):

    session_info = self.get_session_info()
    parsed_data = self.get_parsed_data(session_info, zone_constant.SESSION_BEGIN, zone_constant.SESSION_END)
    try:
        is_vf_enabled = bool(self.get_nvp_value(parsed_data, zone_constant.VF_ENABLED))
    except exception.BrocadeZoningHttpException:
        is_vf_enabled = False
        parsed_data = None
    return (is_vf_enabled, parsed_data)
