How A Cluster Works - HP 5500 EI Series Configuration Manual

Figure 57 Network diagram
As shown in
function is the management switch, the other managed switches are member switches, and the switch
that does not belong to any cluster but can be added to a cluster is a candidate switch. The management
switch and the member switches form the cluster.
Figure 58 Role change in a cluster
As shown in
A candidate switch becomes a management switch when you create a cluster on it. A management
•
switch becomes a candidate switch only after the cluster is removed.
A candidate switch becomes a member switch after it is added to a cluster. A member switch
•
becomes a candidate switch after it is removed from the cluster.

How a cluster works

Cluster management is implemented through HW Group Management Protocol version 2 (HGMPv2),
which consists of the following three protocols:
Neighbor Discovery Protocol (NDP)
•
Neighbor Topology Discovery Protocol (NTDP)
•
Cluster
•
These protocols enable topology data collection and cluster establishment and maintenance.
The following is the topology data collection process:
Every switch uses NDP to collect data on the directly connected neighbors, including their software
•
Figure 57, the switch configured with a public IP address and performing the management
Figure 58, a switch in a cluster changes its role according to the following rules:
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