1-7is, the entry with the destination address as the management device cannot be added to the routingtable, the candidate device will be added to and removed from the cluster repeatedly.Configuring the Management DeviceEnabling NDP Globally and for Specific PortsFor NDP to work normally, you must enable NTDP both globally and on specific ports.Follow these steps to enable NDP globally and for specific ports:To do… Use the command… RemarksEnter system view system-view —Enable NDP globally ndp enable OptionalEnabled by default.In systemview ndp enable interfaceinterface-listinterface interface-typeinterface-numberEnable theNDP featurefor the port(s)In Ethernetinterface viewor Layer 2aggregateinterface view ndp enableUse either commandBy default, NDP is enabledglobally and also on all ports.You are recommended to disable NDP on the port which connects with the devices that do not need tojoin the cluster, preventing the management device from adding the device which needs not to join thecluster and collecting the topology information of this device.Configuring NDP ParametersA port enabled with NDP periodically sends NDP packets to its neighbors. If no NDP information fromthe neighbor is received when the holdtime times out, the corresponding entry is removed from the NDPtable.Follow these steps to configure NDP parameters:To do… Use the command… RemarksEnter system view system-view —Configure the interval forsending NDP packets ndp timer hello hello-time Optional60 seconds by default.Configure the period for thereceiving device to keep theNDP packetsndp timer aging aging-time Optional180 seconds by default.