Brocade Virtual ADX Administration Guide (Supporting ADX v03.1.00) - Manual (Page 134)

122 Brocade Virtual ADX Administration Guide
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Full and incremental configuration synchronization
5
Full and incremental configuration synchronization
Configuration synchronization consists of two operations: full synchronization and incremental
synchronization.
Full synchronization
A full synchronization operation is useful when a new Brocade Virtual ADX is added to create an HA
pair, or an existing device in an HA pair is replaced with a new one. In such cases, the full
synchronization operation synchronizes the essential components, such as the configuration file,
and OpenScript files, to the newly available device.
In a full synchronization operation, the sender device synchronizes the entire configuration
including OpenScript and SSH client public keys to the receiver device. The configuration is pushed
as a startup configuration on the receiver device, and the receiver device is reloaded.
NOTE
The sender device is not reloaded during the full synchronization process, and it continues to
process data traffic.
NOTE
Brocade recommends that the IP addresses for the different interfaces be configured on the
receiver device before full synchronization. The IP addresses are retained on the receiver device
after the full synchronization. IP addresses are not synchronized from the sender device to the
receiver device.
Incremental synchronization
Once a full synchronization operation is complete, the commands that are entered on the sender
device are recorded in an incremental buffer. When a write memory command is executed on the
sender device, the content from this incremental buffer is synchronized to the receiver device. If
any of the OpenScript and SSH files have been added or updated since the last full synchronization
or incremental synchronization operation, those files too are synchronized to the receiver device
upon execution of the write memory command. The content of the incremental buffer is
subsequently cleared.
To prevent potential failures due to dependency of configuration commands on the presence of
OpenScript files in the file system, such files are always synchronized prior to the synchronizing of
configuration commands.
NOTE
If the sender device is rebooted before conducting an incremental synchronization, the content in
the incremental buffer is lost. If the receiver device reboots prior to an incremental synchronization
operation, the content of the incremental buffer on the sender device is not impacted. It is highly
recommended that an incremental synchronization be conducted using the write memory command
to post any configuration changes on the sender device.
NOTE
The sender device does not initiate automatic synchronization of incremental changes. Use the write
memory command to synchronize such changes.