def configNetworkGroupWithTopology(self, topoType='Linear', **kwargs):
        """
        Description
            Create or modify a Network Group Topology for network advertisement.

            Pass in the Device Group obj for creating a new Network Group.
                /api/v1/sessions/1/ixnetwork/topology/1/deviceGroup/1

            Pass in the Network Group obj to modify.
               /api/v1/sessions/1/ixnetwork/topology/1/deviceGroup/1/networkGroup/1

            Pass in topoType(topology type) to configure require network with topology type
                Ex: 'Custom','Fat Tree','Grid','Hub-And-Spoke','Linear','Mesh','Ring','Tree'

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

        Example:
               Device Group object sample: /api/v1/sessions/1/ixnetwork/topology/1/deviceGroup/1
               configNetworkGroupWithTopology(topoType='Linear',create=deviceGroupObj
                                  name='networkGroup1',
                                  multiplier = 100
                                  )


               To modify a Network Group:
               NetworkGroup obj sample: /api/v1/sessions/1/ixnetwork/topology/1/deviceGroup/1/networkGroup/1
               configNetworkGroupWithTopology(topoType='Linear',modify=networkGroupObj,
                                  name='networkGroup-ospf',
                                  multiplier = 100,
                                  )

        Return
            /api/v1/sessions/{id}/ixnetwork/topology/{id}/deviceGroup/{id}/networkGroup/{id}
            /api/v1/sessions/{id}/ixnetwork/topology/{id}/deviceGroup/{id}/networkGroup/{id}/networkTopology/netTopologyLinear
        """
        # In case it is modify, we still need to return self.prefixPoolObj
        self.topoTypeDict = {'Custom' 	    : 'netTopologyCustom',
                            'Fat Tree'	    : 'netTopologyFatTree',
                            'Grid'     	    : 'netTopologyGrid',
                            'Hub-And-Spoke' : 'netTopologyHubNSpoke',
                            'Linear'        : 'netTopologyLinear',
                            'Mesh'	    : 'netTopologyMesh',
                            'Ring'	    : 'netTopologyRing',
                            'Tree'	    : 'netTopologyTree',
                        }

        self.networkTopologyObj = None

        if 'create' not in kwargs and 'modify' not in kwargs:
            raise IxNetRestApiException('configNetworkGroup requires either a create or modify parameter.')

        if 'create' in kwargs:
            deviceGroupObj = kwargs['create']
            self.ixnObj.logInfo('Creating new Network Group')
            response = self.ixnObj.post(self.ixnObj.httpHeader + deviceGroupObj + '/networkGroup')
            networkGroupObj = response.json()['links'][0]['href']

        if 'modify' in kwargs:
            networkGroupObj = kwargs['modify']

        if 'name' in kwargs:
            self.ixnObj.patch(self.ixnObj.httpHeader + networkGroupObj, data={'name': kwargs['name']})

        if 'multiplier' in kwargs:
            self.ixnObj.patch(self.ixnObj.httpHeader + networkGroupObj, data={'multiplier': kwargs['multiplier']})

        if 'create' in kwargs:
            self.ixnObj.logInfo('Create new Network Group network topology')
            response = self.ixnObj.post(self.ixnObj.httpHeader + networkGroupObj + '/networkTopology')
            response = self.ixnObj.post(self.ixnObj.httpHeader + networkGroupObj + '/networkTopology/'+self.topoTypeDict[topoType])
            networkTopologyObj = response.json()['links'][0]['href']
        else:
            networkTopologyObj = networkGroupObj + '/networkTopology/'+self.topoTypeDict[topoType]

        return networkGroupObj, networkTopologyObj