906 CHAPTER 73: CLUSTER MANAGEMENT CONFIGURATION
Figure 267 Network diagram for a cluster
Cluster management offers the following advantages:
■ Saving public IP address resource
■ Simplifying configuration and management tasks. By configuring a public IP
address on the management device, you can configure and manage a group of
member devices on the management device without the trouble of logging
onto each device separately.
■ Providing topology discovery and display function, which is useful for network
monitoring and debugging
■ Allowing simultaneous software upgrading and parameter configuring 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 role a device plays. The following three roles exist
in a cluster: management device, member device, and candidate device.
■ Management device: The device providing management interfaces for all
devices in the cluster and the only device configured with a public IP address.
Any configuration, management, and monitoring of the member devices in a
cluster can only be implemented through the management device. When a
device is specified as the management device, it collects Neighbor Discovery
Protocol (NDP) and Neighbor Topology Discovery Protocol (NTDP) information
to discover and define a candidate device.
■ Member device: The device being managed by the management device in a
cluster.
■ Candidate device: 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.
Network
69.110.1.100
Network
management
device
69.110.1.1
Management
device
Member
device
Member
device
Member
device
Cluster
Candidate
device
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