def enableProtocolOnPort(self, protocol, portName, enable=True):
        """
        Description
           Enable protocol on a speficied port

        Parameters
            protocol: <str>: Protocol to start
            portName: <str>: Name of the port eg: '1/1/11'
            enable: <bool> enable or disable specified protocol. default is True

        Syntax
            PATCH: /api/v1/sessions/{id}/ixnetwork/vport/{id}/protocols/<protocol>/router/{id}
            PATCH: /api/v1/sessions/{id}/ixnetwork/vport/{id}/protocols/<protocol>/neighborRange/{id}
            PATCH: /api/v1/sessions/{id}/ixnetwork/vport/{id}/protocols/<protocol>/host/{id}
            PATCH: /api/v1/sessions/{id}/ixnetwork/vport/{id}/protocols/<protocol>/bridge/{id}
            PATCH: /api/v1/sessions/{id}/ixnetwork/vport/{id}/protocols/<protocol>/actor/{id}
            PATCH: /api/v1/sessions/{id}/ixnetwork/vport/{id}/protocols/<protocol>/neighborPair/{id}

        Examples
            enableProtocolOnPort(protocol='ospf', portName='1/1/11')
            enableProtocolOnPort(protocol='ospf', portName='1/1/11', enable=False)
        """
        vport = self.portMgmtObj.getVportObjectByName(portName)
        if vport == None:
            raise IxNetRestApiException('PortName {0} not connected to chassis'.format(portName))

        RouterInstanceList = self.getRouterInstanceByPortAndProtocol(protocol=protocol, vport=vport)
        if RouterInstanceList == []:
            raise IxNetRestApiException('No Router instance exists in protocol {0}'.format(protocol))

        for eachRouterInstance in RouterInstanceList:
            url = self.ixnObj.httpHeader + eachRouterInstance
            self.ixnObj.patch(url, data={"enabled": enable})