9-16password of any member (including the management device and member devices) of thecluster; otherwise, the switching may fail because of an authentication failure.z If the member specified in this command does not exist, the system prompts error whenyou execute the command; if the switching succeeds, your user level on the managementdevice is retained.z If the Telnet users on the device to be logged in reach the maximum number, the switchingfails.z To prevent resource waste, avoid ring switching when configuring access between clustermembers. For example, if you switch from the operation interface of the managementdevice to that of a member device and then need to switch back to that of the managementdevice, use the quit command to end the switching, but not the cluster switch-toadministrator command to switch to the operation interface of the management device.Adding a Candidate Device to a ClusterFollow these steps to add a candidate device to a cluster:To do… Use the command… RemarksEnter system view system-view —Enter cluster view cluster —Add a candidate device to theclusteradministrator-addressmac-address name name RequiredConfiguring Advanced Cluster FunctionsThis section covers these topics:z Configuring Topology Managementz Configuring Interaction for a Clusterz SNMP Configuration Synchronizationz Configuring Web User Accounts in BatchesConfiguring Topology ManagementThe concepts of blacklist and whitelist are used for topology management. An administrator candiagnose the network by comparing the current topology (namely, the information of a node andits neighbors in the cluster) and the standard topology.z Topology management whitelist (standard topology): A whitelist is a list of topologyinformation that has been confirmed by the administrator as correct. You can get theinformation of a node and its neighbors from the current topology. Based on the information,you can manage and maintain the whitelist by adding, deleting or modifying a node.z Topology management blacklist: Devices in a blacklist are not allowed to join a cluster. A
