Huawei SmartAX MA5603T Configuration Manual page 217

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
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Context
Classification of the active/standby switchover:
According to the status of the data synchronization, the active/standby switchover is classified
into the normal switchover and forced switchover.
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Procedure
Step 1 Run the save command to save the data.
Step 2 Run the system switch-over command to perform the active/standby switchover.
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Result
When the ACT LED on the original standby control board is on, log in to the system through
this control board. It is found that the system runs in the normal state.
Example
After the data is saved, perform the active/standby switchover.
Issue 01 (2014-04-30)
When the data is being loaded, saved, or backed up, the system prohibits the active/standby
switchover.
Normal switchover: Refers to the active/standby switchover that is performed when the
data is synchronized sufficiently. A normal switchover does not cause links to break or
boards to reset.
Forced switchover: Refers to the active/standby switchover that is performed when the data
is not synchronized sufficiently.
The following data might be synchronized insufficiently:
– Configuration data.
When the configuration data is not fully synchronized, the system prohibits performing
forced switchover by running the active/standby switchover command. Other forced
switching methods, such as manually resetting the active control board or removing the
active control board, cause loss of basic data or the system to reset.
Therefore, when the configuration data is not fully synchronized, it is recommended
that you do not perform the forced switchover. You can choose to reset the system. In
this manner, the system can return to the normal state in a short period.
– Basic data.
When the basic data is not fully synchronized, the system prohibits performing forced
switchover by running the active/standby switchover command. Other forced switching
methods, such as manually resetting the active board or removing the active control
board, neither reset the system nor affect the database, but they may cause service boards
to reset.
– Dynamic data.
When certain dynamic data is not fully synchronized, the system permits performing
forced switchover by running the active/standby switchover command. After the
switchover, the on-going services continue to run in the normal state, and the original
connections, alarms, and logs are not lost.
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