АМАТЕК AN-SGM28P24-400 [257/322] Cluster role

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three protocols。

 NDP（Neighbor Discovery Protocol）

 NTDP（Neighbor Topology Discovery Protocol）

 Cluster （Cluster Management Protocol）

The working process of the cluster and the cluster topology collection including the

establishment and maintenance, and maintenance of the cluster topology collection process is

relatively independent, topology collection process begins to start up in the cluster before the

establishment of the working principle is as follows：

 All devices acquire the information of neighbor devices through NDP, including the

software version, host name, MAC address and port name of neighbor devices。

 The management device collects the device information and the connection information

of each device through the NTDP, and determines the cluster candidate devices from the collected

topology information。

 The management device completes the operation of adding candidate devices to cluster

and member devices leaving the cluster according to the candidate device information collected by

NTDP。

The cluster message is two layer Ethernet message, the specific format and interactive process

refer to the national standard "YDT 1692-2007 Ethernet switch cluster management technical

requirements"

21.1.2 Cluster role

According to the position and function of the devices in the cluster, different roles are formed.

The user can specify roles by configuration, and all the roles are as follows：

1）Command Switch：

In a cluster, the only switch that can configure and manage the entire cluster is also the only

switch in the cluster with the public network IP address。

 Command switches create clusters；

 Command switches discover and determine candidate switches by collecting

information from NDP (Neighbor Discovery Protocol) and NTDP (Neighbor Topology Discovery

Protocol)；

 Command switches control cluster maintenance by adding candidate switches to clusters

or deleting member switches from clusters；

 After the cluster is established, the command switch provides a management channel for

the cluster。

2）member switch

Managed switches in a cluster。