def modifyL1Config(self, configSettings, portList='all'):
        """
        Description
           Modify Layer 1 Configuration

        Parameters
           portList: <'all'|list of ports>: 
                     <list>: Format: [[ixChassisIp, str(cardNumber1), str(portNumber1])]...]
                     Or if portList ='all', will modify all assigned ports to the specified configSettings.
                     Note:  all ports must be of the same type

           configSettings: <dict>: L1 Settings. The actual settings depend on the card type.
                           example for novusHundredGigLan card:   
                           configSettings ={'enabledFlowControl': True,
                                            'flowControlDirectedAddress': '01 80 C2 00 00 00 CC',
                                            'txIgnoreRxLinkFaults': False,
                                            'laserOn': True,
                                            'ieeeL1Defaults': False,
                                            'enableAutoNegotiation': False,
                                            'linkTraining': False,
                                            'firecodeAdvertise': False,
                                            'firecodeRequest': False,
                                            'rsFecAdvertise': False,
                                            'rsFecRequest': False,
                                            'useANResults': False,
                                            'firecodeForceOn': True,
                                            'rsFecForceOn': False,
                                            'forceDisableFEC': False}
        """
        self.ixnObj.logInfo('modifyL1Config: portList = {} configSettings = {}'.format(portList, configSettings))
        response = self.ixnObj.get(self.ixnObj.sessionUrl+'/vport')
        if portList == 'all':
            #vportList = self.getAllVportList()
            portList = self.getPhysicalPortsFromCreatedVports()

        # vportList: ['/api/v1/sessions/1/ixnetwork/vport/1', '/api/v1/sessions/1/ixnetwork/vport/2']
        vportList = self.getVportFromPortList(portList)
        for vport in vportList:
            response = self.ixnObj.get(self.ixnObj.httpHeader+vport, silentMode=True)
            portType = response.json()['type']
            # There are several portTypes that ends with 'Fcoe'.  This has to be stripped.
            portType = portType.strip('Fcoe')
            self.ixnObj.patch(self.ixnObj.httpHeader+vport+'/l1Config/'+portType, data=configSettings)