H3C S5120-SI Series

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may fail because of an authentication failure.
z If the member specified in this command does not exist, the system prompts error when you
execute the command; if the switching succeeds, your user level on the management device is
retained.
z If the Telnet users on the device to be logged in reach the maximum number, the switching fails.
z To prevent resource waste, avoid ring switching when configuring access between cluster
members. For example, if you switch from the operation interface of the management device to that
of a member device and then need to switch back to that of the management device, use the quit
command to end the switching, but not the cluster switch-to administrator command to switch to
the operation interface of the management device.
Adding a Candidate Device to a Cluster
Follow these steps to add a candidate device to a cluster:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter cluster view
cluster
—
Add a candidate device to the
cluster
administrator-address
mac-address name name
Required
Configuring Advanced Cluster Functions
This section covers these topics:
z Configuring Topology Management
z Configuring Interaction for a Cluster
Configuring Topology Management
The concepts of blacklist and whitelist are used for topology management. An administrator can
diagnose the network by comparing the current topology (namely, the information of a node and its
neighbors in the cluster) and the standard topology.
z Topology management whitelist (standard topology): A whitelist is a list of topology information that
has been confirmed by the administrator as correct. You can get the information 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 blacklist
contains the MAC addresses of devices. If a blacklisted device is connected to a network through
another device not included in the blacklist, the MAC address and access port of the latter are also
included in the blacklist. The candidate devices in a blacklist can be added to a cluster only if the
administrator manually removes them from the list.
The whitelist and blacklist are mutually exclusive. A whitelist member cannot be a blacklist member, and
vice versa. However, a topology node can belong to neither the whitelist nor the blacklist. Nodes of this
type are usually newly added nodes, whose identities are to be confirmed by the administrator.