def activateIgmpHostSession(self, portName=None, ipAddress=None, activate=True):
        """
        Description
            Active or deactivate the IGMP host session ID by the portName and IPv4 host address.

        Parameters:
            portName: <str>: The name of the port in which this API will search in all the Topology Groups.
            ipAddress: <str>: Within the Topology Group, the IPv4 address for the IGMP host.
            activate: <bool>: To activate or not to activate.
        """
        # Get the IPv4 address index.  This index position is the same index position for the IGMP host sessionID.
        # Will use this variable to change the value of the IGMP host object's active valueList.
        ipv4AddressIndex = self.getIpAddrIndexNumber(ipAddress)

        # Get the IPv4 object by the port name. This will search through all the Topology Groups for the portName.
        ipv4Obj = self.getIpv4ObjByPortName(portName=portName)

        # With the ipv4Obj, get the IGMP host object's "active" multivalue so we could modify the active valueList.
        queryData = {'from': ipv4Obj,
                    'nodes': [{'node': 'igmpHost', 'properties': ['active'], 'where': []}]}

        queryResponse = self.ixnObj.query(data=queryData, silentMode=False)
        if queryResponse.json()['result'][0]['igmpHost'] == []:
            raise IxNetRestApiException('\nNo IGMP HOST found\n')

        igmpHostActiveMultivalue = queryResponse.json()['result'][0]['igmpHost'][0]['active']

        response = self.ixnObj.get(self.ixnObj.httpHeader+igmpHostActiveMultivalue)
        valueList = response.json()['values']
        # Using the ipv4 address index, activate the IGMP session ID which is the same index position.
        valueList[ipv4AddressIndex] = activate
        self.ixnObj.configMultivalue(igmpHostActiveMultivalue, multivalueType='valueList', data={'values': valueList})