Configure lag on existing DVS

Describe the bug

While configuring lag in passive mode on a existing DVS switch, method not found exception was caught, even though the method has been defined in the class. Exception details: (vmodl.fault.MethodNotFound) { dynamicType = , dynamicProperty = (vmodl.DynamicProperty) [], msg = , faultCause = , faultMessage = (vmodl.LocalizableMessage) [], receiver = 'vim.dvs.VmwareDistributedVirtualSwitch:dvs-73', method = 'UpdateLacpGroupConfig' }

Reproduction steps

def create_lag(si, dvsName, lagName, numberOfUplinks): try: dvs_vim_type = [vim.DistributedVirtualSwitch] vds = get_obj(si,dvs_vim_type,dvsName) except Exception as e: print(e) return None

#create lacp in passive mode
try:     

    lacpGroupSpec_0 = vim.dvs.VmwareDistributedVirtualSwitch.LacpGroupSpec()
    lacpGroupSpec_0.lacpGroupConfig = vim.dvs.VmwareDistributedVirtualSwitch.LacpGroupConfig()
    lacpGroupSpec_0.lacpGroupConfig.mode = 'passive'
    lacpGroupSpec_0.lacpGroupConfig.ipfix = vim.dvs.VmwareDistributedVirtualSwitch.LagIpfixConfig()
    lacpGroupSpec_0.lacpGroupConfig.loadbalanceAlgorithm = 'srcDestIpTcpUdpPortVlan'
    lacpGroupSpec_0.lacpGroupConfig.vlan = vim.dvs.VmwareDistributedVirtualSwitch.LagVlanConfig()
    lacpGroupSpec_0.lacpGroupConfig.name = 'vsan_lag'
    #lacpGroupSpec_0.lacpGroupConfig.timeoutMode = 'slow'
    lacpGroupSpec_0.lacpGroupConfig.uplinkNum = 2
    lacpGroupSpec_0.operation = 'add'
    lacpGroupSpec = [lacpGroupSpec_0]
    task = vds.UpdateDVSLacpGroupConfig_Task(lacpGroupSpec)
    # The attributes of lacpGroupConfig includes: 'dynamicProperty', 'dynamicType', 'ipfix', 'key', 'loadbalanceAlgorithm', 'mode', 'name', 'uplinkName', 'uplinkNum', 'uplinkPortKey', 'vlan'
    # this list does not contain timeoutMode. As default value for timeout mode is slow, ignoring this for now
    # TO DO : how to set the timeoutMode should be explored

    state, result = wait_for_task(task)
    if not state:
        print(result)
        exit()       
    return result
except Exception as e:
    print(e)
    return None

Obtained similar result when task = vds.UpdateLacpGroupConfig(lacpGroupSpec) was used.

Expected behavior

Exception should have fault cause and fault message set to an appropriate value that describes the nature of the fault.
Clear instructions of what pre-requisites needs to be set should be documented.

Additional context

Please note that the main logic of the code was generated using the developer center's code capture feature

vmware / pyvmomi