def modifyTrafficItemDestMacAddress(self, trafficItemObj=None, trafficItemName=None, endpointSetName=None, values=None):
        """
        Description
           Modify a Traffic Item Flow group IP Priority TOS fields.

        Parameters
           value: <'str'|dict>: 
                  If str: The mac address address
                  If dict: Any or all the properties and the values:

                          {'valueType': 'increment',
                           'startValue': destMacAddress,
                           'stepValue': '00:00:00:00:00:00',
                           'countValue': 1,
                           'auto': False}
           
           trafficItemObj: <str|obj>: The Traffic Item object handle.
           trafficItemName: <str|obj>: The Traffic Item name.
           endpointSetName: <str|obj>: The endpointSet name (Flow-Group).

           Option #1: trafficItemName + endpointSetName
           Option #2: trafficItemObj + endpointSetName
           Option #3: trafficItemName only (Will assume there is only one configElement object)
           Option #4: trafficItemObj only  (Will assume there is only one configElement object)

        Requirement
           Call self.getConfigElementObj() to get the config element object first.

        Example
           trafficObj.modifyTrafficItemDestMacAddress(trafficItemName='Raw MPLS/UDP', values='00:01:01:02:00:01')
        """
        
        if type(values) == str:
            values = {'valueType': 'increment',
                      'startValue': values,
                      'stepValue': '00:00:00:00:00:00',
                      'countValue': 1,
                      'auto': False}

        configElementObj = self.getConfigElementObj(trafficItemObj=trafficItemObj, trafficItemName=trafficItemName,
                                                    endpointSetName=endpointSetName)

        self.modifyTrafficItemPacketHeader(configElementObj, packetHeaderName='ethernet',
                                           fieldName='Destination MAC Address', values=values)