def flapBgpPeerNgpf(self, bgpObjHandle, enable=True, flapList='all', uptime=0, downtime=0):
        """
        Description
           Enable or disable BGP flapping on either all or a list of IP interfaces.

        Parameters
            bgpObjHandle: The bgp object handle.
                         /api/v1/sessions/<int>/ixnetwork/topology/<int>/deviceGroup/<int>/ethernet/<int>/ipv4/<int>/bgpIpv4Peer/<int>
            enable: <bool>: Default = True
            flapList: 'all' or a list of IP addresses to enable/disable flapping.
                      [['10.10.10.1', '10.10.10.8', ...]
                      Default = 'all'
            uptime: <int>: In seconds. Defaults = 0
            downtime: <int>: In seconds. Defaults = 0

        Syntax
           POST = /api/v1/sessions/<int>/ixnetwork/topology/<int>/deviceGroup/<int>/ethernet/<int>/ipv4/<int>/bgpIpv4Peer/<int>
        """
        if flapList != 'all' and type(flapList) != list:
            ipRouteListToFlap = flapList.split(' ')

        response = self.ixnObj.get(self.ixnObj.httpHeader+bgpObjHandle)

        # Get the IP object from the bgpObjHandle
        match = re.match('(/api.*)/bgp', bgpObjHandle)
        ipObj = match.group(1)

        ipAddressList = self.getIpAddresses(ipObj)
        count = len(ipAddressList)

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

        # Copy the same index list for uptime and downtime
        indexUptimeList = indexToFlapList
        indexDowntimeList = indexToFlapList
        response = self.ixnObj.get(self.ixnObj.httpHeader+bgpObjHandle)
        enableFlappingMultivalue = response.json()['flap']
        upTimeMultivalue = response.json()['uptimeInSec']
        downTimeMultivalue = response.json()['downtimeInSec']

        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 flapList == '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 flapList != 'all':
            # ['true', 'true', 'true']
            currentFlappingValueList = flappingResponse
            # ['10', '10', '10']
            currentUptimeValueList   = uptimeResponse
            # ['20', '20', '20']
            currentDowntimeValueList = downtimeResponse

            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

        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})