Operation Manual - Reliability
Quidway S6500 Series Ethernet Switches Chapter 2 HA Configuration
Huawei Technologies Proprietary
2-1
Chapter 2 HA Configuration
2.1 HA Overview
S6506R supports high availability (HA) feature. This feature is to achieve a high
availability of the system and to recover the system as soon as possible in the event
of failures so as to shorten the mean time between failure (MTBF) of the system.
The functions of HA are mainly implemented by the application running on SRPU
board. SRPUs are working in the master-slave mode: one board works in master
mode, the other works in slave mode. If the master-slave system detects a fault in the
master board, a hot master-slave switchover will be performed automatically. The
slave board will try to connect and control the system bus while the original master
board will try to disconnect with the bus. Thus, the master-slave switchover of the
active system is completed, and at the same time the original master board is reset to
recover as soon as possible and then function as the slave board. Even if the master
board fails, the slave board can also take its role to ensure the normal operation of
S6506R.
S6506R supports hot swap of SRPUs. The hot swap of master boards will cause
switchover master/slave.
S6506R supports manually switchover master/slave. You can change the current
board state manually by executing command.
The configuration file of the slave is copied from the master board at the same time,
which can ensure that the slave system continues to operate in the same
configuration as that of the original active system after the master-slave switchover.
S6506R supports automatic synchronization. The active system stores its
configuration file and backup the configuration file to the slave system simultaneously
when the master's configuration file is modified, ensuring the consistency of the
configurations of the active system and slave system.
Besides, the system can monitor the power supply and the operating environment of
the system and give timely alarms to avoid the escalation of failures and ensure safe
operations of the system.
2.2 HA Configuration
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