H3C S5510 Series Operation Manual page 7

Operation Manual – Cluster Management
H3C S3610&S5510 Series Ethernet Switches
Receives the
handshake or
management
packets
Connect
Figure 1-3 Management/member device state change
After a cluster is created and a candidate device is added to the cluster and
becomes a member device, the management device saves the state information
of its member device and identifies it as Active. And the member device also saves
its state information and identifies it as Active.
After a cluster is created, its member devices begin to send handshake packets
first. The management device also sends handshake packets to the member
devices at the same interval. Upon receiving the handshake packets from the
other side, the management device or member device simply changes or remains
its state as Active, without sending a response.
If the management device does not receive the handshake packets from a
member device in an interval three times of the interval to send handshake
packets, it changes the status of the member device from Active to Connect.
Likewise, if a member device fails to receive the handshake packets from the
management device in an interval three times of the interval to send handshake
packets, the status of the member device will also be changed from Active to
Connect.
If this management device, in information holdtime, receives the handshake or
management packets from its member device which is in Connect state, it
changes the state of its member device to Active; otherwise, it changes the state
of its member device to Disconnect, in which case the management device
considers its member device disconnected. If this member device, which is in
Connect state, receives handshake or management packets from the
management device in information holdtime, it changes its state to Active;
otherwise, it changes its state to Disconnect.
If the communication between the management device and a member device is
recovered, the member device which is in Disconnect state will be added to the
cluster. After that, the state of the member device locally and on the management
device will be changed to Active.
Besides, the member device informs the management device using handshake
packets when there is a neighbor topology change.
Chapter 1 Cluster Management Configuration
Active
Fails to receive
handshake
packets in three
consecutive
intervals
State holdtime exceeds
the specified value
1-6
Disconnect state
is recovered
Disconnect