H3C S3100-52P Operation Manual page 613

Operation Manual – Stack-Cluster
H3C S3100-52P Ethernet Switch
Before performing any cluster-related configuration task, you need to enable the
cluster function first.
Note:
On the management device, you need to enable the cluster function and configure
cluster parameters. On the member/candidate devices, however, you only need to
enable the cluster function so that they can be managed by the management device.
IV. Cluster maintenance
1) Adding a candidate device to a cluster
To create a cluster, you need to determine the device to operate as the management
device first. The management device discovers and determines candidate devices
through NDP and NTDP, and adds them to the cluster. You can also add candidate
devices to a cluster manually.
After a candidate device is added to a cluster, the management device assigns a
member number and a private IP address (used for cluster management) to it.
2) Communications within a cluster
In a cluster, the management device maintains the connections to the member devices
through handshake packets.
between the management device and a member device.
Receives the
handshake or
management
packets
Connect
Figure 2-3 State machine of the connection between the management device and a
member device
After a cluster is created and a candidate device is added to the cluster as a
member device, both the management device and the member device store the
state information of the member device and mark the member device as Active.
Figure 2-3 illustrates the state machine of the connection
Active
Fails to receive
handshake
packets in three
consecutive
intervals
State holdtime exceeds
the specified value
2-7
Chapter 2 Cluster
Disconnect state
is recovered
Disconnect