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eSight V300R010C00 Maintenance Guide 08

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
HA System Status Transition Principles

HA System Status Transition Principles

The HA system status changes when a fault occurs or after the fault is rectified. This section describes the status transition principles in the HA system.

Generally, when the system is working normally, eSight runs on the active server, and the standby server is ready to replace the active server if a fault occurs. Figure 3-10 shows the status transition in the HA system.

Figure 3-10 Status transition in the HA system

Table 3-10 describes the transitions and factors that trigger the transitions among statuses in the HA system.

Table 3-10 Status transition

Transition Line Order

Status Transition

Trigger Factor

(1)

Normal status→Switchover status

  • Resources of the active server are faulty (displayed as Abnormal and then changed to Exception).
  • The OS of the active server breaks down, or the hardware is faulty.

(2)

Switchover status→Protection failure status

  • Resources of the active server are faulty (displayed as Abnormal and then changed to Exception).
  • The OS of the active server breaks down, or the hardware is faulty.

(3)

Normal status→Disconnection status

Heartbeat interruption

(4)

Disconnection status→Normal status

Heartbeat recovery

(5)

Protection failure status→Normal status

  • Faults in the standby server resources are rectified.
  • The OS of the standby server recovers, or the hardware fault is rectified.

(6)

Normal status→Protection failure status

  • The OS of the standby server breaks down, or the hardware is faulty.
  • Resources of the standby server are abnormal.
  • The switchover is disabled on the active server.

(7)

Protection failure status→System failure status

The active server is faulty (displayed as Abnormal and then changed to Exception).

  • Resources of the active server are faulty.
  • The OS of the active server breaks down, or the hardware is faulty.

(8)

Switchover status→System failure status

The standby server is faulty (displayed as Abnormal and then changed to Exception).

  • Resources of the standby server are faulty.
  • The OS of the standby server breaks down, or the hardware is faulty.

(9)

Disconnection status→Dual-active status

The heartbeat connection is interrupted and the standby server cannot detect the floating IP address occupation.

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Updated: 2019-08-03

Document ID: EDOC1100044373

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