def createDeviceGroupNgpf(self, topologyObj, multiplier=1, deviceGroupName=None):
        """
        Description
            Create a new Device Group.

        Parameters
            topologyObj: <str>: A Topology object: /api/v1/sessions/1/ixnetwork/topology/{id}
            multiplier: <int>: The amount of host to create (In integer).
            deviceGroupName: <str>: Optional: Device Group name.

        Syntax
            POST: /api/v1/sessions/{id}/ixnetwork/topology/{id}/deviceGroup

        Returns:
            /api/v1/sessions/{id}/ixnetwork/topology/{id}/deviceGroup/{id}
        """
        url = self.ixnObj.httpHeader+topologyObj+'/deviceGroup'
        deviceGroupData = {'multiplier': int(multiplier)}
        if deviceGroupName != None:
            deviceGroupData['name'] = deviceGroupName

        self.ixnObj.logInfo('Create new Device Group')
        response = self.ixnObj.post(url, data=deviceGroupData)
        deviceGroupObj = response.json()['links'][0]['href']
        return deviceGroupObj