def getPortsByProtocolNgpf(self, ngpfEndpointName):
        """
        Description
            For IxNetwork NGPF only:
            Based on the specified NGPF endpoint name, return all ports associated with the protocol.

        Parameter
            ngpfEndpointName: <str>: See below for all the NGPF endpoint protocol names.

         Returns
            [chassisIp, cardNumber, portNumber]
            Example: [['10.219.117.101', '1', '1'], ['10.219.117.101', '1', '2']]

            Returns [] if no port is configured with the specified ngpfEndpointName

         ngpfEndpointName options:
            'ancp', 'bfdv4Interface', 'bgpIpv4Peer', 'bgpIpv6Peer', 'dhcpv4relayAgent', 'dhcpv6relayAgent',
            'dhcpv4server', 'dhcpv6server', 'geneve', 'greoipv4', 'greoipv6', 'igmpHost', 'igmpQuerier',
            'lac', 'ldpBasicRouter', 'ldpBasicRouterV6', 'ldpConnectedInterface', 'ldpv6ConnectedInterface',
            'ldpTargetedRouter', 'ldpTargetedRouterV6', 'lns', 'mldHost', 'mldQuerier', 'ptp',
            'ipv6sr', 'openFlowController', 'openFlowSwitch', 'ospfv2', 'ospfv3',  'ovsdbcontroller',
            'ovsdbserver', 'pcc', 'pce', 'pcepBackupPCEs', 'pimV4Interface', 'pimV6Interface', 'ptp',
            'rsvpteIf', 'rsvpteLsps', 'tag', 'vxlan'
        """
        portList = []
        response = self.ixnObj.get(self.ixnObj.sessionUrl+'/topology')
        topologyList = ['%s/%s/%s' % (self.ixnObj.sessionUrl, 'topology', str(i["id"])) for i in response.json()]
        for topology in topologyList:
            response = self.ixnObj.get(topology+'/deviceGroup')
            deviceGroupList = ['%s/%s/%s' % (topology, 'deviceGroup', str(i["id"])) for i in response.json()]
            for deviceGroup in deviceGroupList:
                response = self.ixnObj.get(deviceGroup+'/ethernet')
                ethernetList = ['%s/%s/%s' % (deviceGroup, 'ethernet', str(i["id"])) for i in response.json()]
                for ethernet in ethernetList:
                    response = self.ixnObj.get(ethernet+'/ipv4')
                    ipv4List = ['%s/%s/%s' % (ethernet, 'ipv4', str(i["id"])) for i in response.json()]
                    response = self.ixnObj.get(ethernet+'/ipv6')
                    ipv6List = ['%s/%s/%s' % (ethernet, 'ipv6', str(i["id"])) for i in response.json()]
                    for layer3Ip in ipv4List+ipv6List:
                        url = layer3Ip+'/'+ngpfEndpointName
                        print('\nProtocol URL:', url)
                        response = self.ixnObj.get(url)
                        if response.json() == []:
                            continue

                        response = self.ixnObj.get(topology)
                        vportList = response.json()['vports']
                        for vport in vportList:
                            response = self.ixnObj.get(self.ixnObj.httpHeader+vport)
                            assignedTo = response.json()['assignedTo']
                            currentChassisIp  = str(assignedTo.split(':')[0])
                            currentCardNumber = str(assignedTo.split(':')[1])
                            currentPortNumber = str(assignedTo.split(':')[2])
                            currentPort = [currentChassisIp, currentCardNumber, currentPortNumber]
                            portList.append(currentPort)
                            self.ixnObj.logInfo('\tFound port configured: %s' % currentPort)
        return portList