def flapBgpRoutesNgpf(self, prefixPoolObj, enable=True, ipRouteListToFlap='all', uptime=0, downtime=0, ip='ipv4'):
        """
        Description
           This API will enable or disable flapping on either all or a list of BGP IP routes.
           If you are configuring routes to enable, you could also set the uptime and downtime in seconds.

        Parameters
            prefixPoolObj = The Network Group PrefixPool object that was returned by configNetworkGroup()
                            /api/v1/sessions/<int>/ixnetwork/topology/<int>/deviceGroup/<int>/networkGroup/<int>/ipv4PrefixPools/<int>
            enable: True or False
                - Default = True
            ipRouteListToFlap: 'all' or a list of IP route addresses to enable/disable.
                                 [['160.1.0.1', '160.1.0.2',...]
                - Default = 'all'
            upTime: In seconds.
                - Defaults = 0
            downTime: In seconds.
                - Defaults = 0
            ip: ipv4 or ipv6
                - Defaults = ipv4

        Syntax
           POST = For IPv4: http://{apiServerIp:port}/api/v1/sessions/<int>/ixnetwork/topology/<int>/deviceGroup/<int>/networkGroup/<int>/ipv4PrefixPools/<int>/bgpIPRouteProperty

                  For IPv6: http://{apiServerIp:port}/api/v1/sessions/<int>/ixnetwork/topology/<int>/deviceGroup/<int>/networkGroup/<int>/ipv4PrefixPools/<int>/bgpV6IPRouteProperty
        """

        if ipRouteListToFlap != 'all' and type(ipRouteListToFlap) != list:
            ipRouteListToFlap = ipRouteListToFlap.split(' ')

        # Get a list of configured IP route addresses
        response = self.ixnObj.get(self.ixnObj.httpHeader+prefixPoolObj)
        networkAddressList = response.json()['lastNetworkAddress']
        count = len(networkAddressList)

        # Recreate an index list based on user defined ip route to enable/disable
        indexToFlapList = []
        if ipRouteListToFlap != 'all':
            for ipRouteAddress in ipRouteListToFlap:
                # A custom list of indexes to enable/disable flapping based on the IP address index number.
                indexToFlapList.append(networkAddressList.index(ipRouteAddress))

        # Copy the same index list for uptime and downtime
        indexUptimeList = indexToFlapList
        indexDowntimeList = indexToFlapList

        if ip == 'ipv4':
            response = self.ixnObj.get(self.ixnObj.httpHeader+prefixPoolObj+'/bgpIPRouteProperty')
        if ip == 'ipv6':
            response = self.ixnObj.get(self.ixnObj.httpHeader+prefixPoolObj+'/bgpV6IPRouteProperty')

        enableFlappingMultivalue = response.json()[0]['enableFlapping']
        upTimeMultivalue = response.json()[0]['uptime']
        downTimeMultivalue = response.json()[0]['downtime']
        flappingResponse = self.ixnObj.getMultivalueValues(enableFlappingMultivalue)
        uptimeResponse = self.ixnObj.getMultivalueValues(upTimeMultivalue)
        downtimeResponse = self.ixnObj.getMultivalueValues(downTimeMultivalue)

        # Flapping IP addresses
        flapOverlayList = []
        uptimeOverlayList = []
        downtimeOverlayList = []
        # Build a valueList of either "true" or "false"
        if ipRouteListToFlap == 'all':
            for counter in range(0,count):
                if enable == True:
                    flapOverlayList.append("true")
                if enable == False:
                    flapOverlayList.append("false")
                uptimeOverlayList.append(str(uptime))
                downtimeOverlayList.append(str(downtime))

        if ipRouteListToFlap != 'all':
            currentFlappingValueList = flappingResponse[0]
            currentUptimeValueList   = uptimeResponse[0]
            currentDowntimeValueList = downtimeResponse[0]

            indexCounter = 0
            for (eachFlapValue, eachUptimeValue, eachDowntimeValue) in zip(currentFlappingValueList,
                                                                           currentUptimeValueList, currentDowntimeValueList):
                # Leave the setting alone on this index position. User did not care to change this value.
                if indexCounter not in indexToFlapList:
                    flapOverlayList.append(eachFlapValue)
                    uptimeOverlayList.append(eachUptimeValue)
                    downtimeOverlayList.append(eachDowntimeValue)
                else:
                    # Change the value on this index position.
                    if enable == True:
                        flapOverlayList.append("true")
                    else:
                        flapOverlayList.append("false")
                    uptimeOverlayList.append(str(uptime))
                    downtimeOverlayList.append(str(downtime))
                indexCounter += 1

        # /topology/[1]/deviceGroup
        self.ixnObj.patch(self.ixnObj.httpHeader + enableFlappingMultivalue+'/valueList', data={'values': flapOverlayList})
        self.ixnObj.patch(self.ixnObj.httpHeader + upTimeMultivalue+'/valueList', data={'values': uptimeOverlayList})
        self.ixnObj.patch(self.ixnObj.httpHeader + downTimeMultivalue+'/valueList', data={'values': downtimeOverlayList})