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Configuring cluster management
With the growth of networks, a great number of access devices are needed at network borders.
Management for these devices is very complicated; moreover, each device needs an IP address and
wastes IP address resources. Problems can be solved by cluster, which is a group of network devices.
Cluster management implements management of large numbers of distributed network devices. Cluster
management offers the following advantages:
• Saving public IP address resource
• Simplifying configuration and management tasks. By configuring a public IP address on one device,
you can configure and manage a group of devices without the trouble of logging in to each device
separately.
• Providing topology discovery and display function, which is useful for network monitoring and
debugging
• Allowing simultaneous software upgrading and parameter configuration on multiple devices, free of
topology and distance limitations
Roles in a cluster
The devices in a cluster play different roles according to their different functions and status. You can
specify the following roles for the devices:
• Management device (Administrator): The device providing management interfaces for all devices in
a cluster and the only device configured with a public IP address. You can specify one and only one
management device for a cluster. Any configuration, management, and monitoring of the other
devices in a cluster can only be implemented through the management device. When a device is
specified as the management device, it collects related information to discover and define candidate
devices.
• Member device (Member): A device managed by the management device in a cluster.
• Candidate device (Candidate): A device that does not belong to any cluster but can be added to a
cluster. Different from a member device, its topology information has been collected by the
management device but it has not been added to the cluster.
Figure 59 Network diagram for a cluster
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