Roles In A Cluster - H3C S3100 8C SI Operation Manual

Operation Manual – Stack-Cluster
H3C S3100 Series Ethernet Switches
It eases the configuration and management of multiple switches: You just need to
configure a public IP address for the management device instead of for all the
devices in the cluster; and then you can configure and manage all the member
devices through the management device without the need to log onto them one by
one.
It provides the topology discovery and display function, which assists in monitoring
and maintaining the network.
It allows you to configure and upgrade multiple switches at the same time.
It enables you to manage your remotely devices conveniently regardless of
network topology and physical distance.
It saves IP address resource.

2.1.2 Roles in a Cluster

The switches in a cluster play different roles according to their functions and status. You
can specify the role a switch plays. A switch in a cluster can also switch to other roles
under specific conditions.
As mentioned above, the three cluster roles are management device, member device,
and candidate device.
Table 2-1 Description on cluster roles
Management device
Member device
Role Configuration
Configured with
a external IP
address
Normally, a
member device
is not assigned
an external IP
address
Provides an interface for managing all
the switches in a cluster
Manages member devices through
command redirection, that is, it
forwards the commands intended for
specific member devices.
Discovers neighbors, collects the
information about network topology,
manages and maintains the cluster.
Management device also supports
FTP server and SNMP host proxy.
Processes the commands issued by
users through the public network
Members of a cluster
Discovers the information about its
neighbors, processes the commands
forwarded
device, and reports log. The member
devices of a luster are under the
management of the management
device.
2-2
Chapter 2 Cluster
Function
by the management