System Management
212
Basic System Configuration Guide
3HE 11010 AAAC TQZZA Edition: 01
6.3 CSM Synchronization and Redundancy
The 7705 SAR uses a 1:1 redundancy scheme. Redundancy methods facilitate
system synchronization between the active and standby CSMs so that they maintain
identical operational parameters to prevent inconsistencies in the event of a CSM
failure.
When automatic system synchronization is enabled for an entity, any save or delete
file operations configured on the primary, secondary, or tertiary choices on the active
CSM file system are mirrored in the standby CSM file system.
Although software configurations and images can be copied or downloaded from
remote locations, synchronization can only occur locally between compact flash
drives (cf3-A: and cf3-B:).
Synchronization can occur:
• automatically — automatic synchronization is disabled by default. To enable
automatic synchronization, the config>redundancy>synchronize command
must be specified with either the boot-env parameter or the config parameter.
When the boot-env parameter is specified, the BOF, boot.ldr, config, and image
files are automatically synchronized. When the config parameter is specified,
only the config files are automatically synchronized.
Automatic synchronization also occurs whenever the BOF is modified with
persistence on and when an admin>save command is entered with no filename
specified.
• manually — to execute synchronization manually, the admin>redundancy>
synchronize command must be entered with the boot-env parameter or the
config parameter.
When the boot-env parameter is specified, the BOF, boot.ldr, config, and image
files are synchronized. When the config parameter is specified, only the config
files are synchronized.
The following shows the output displayed during a manual synchronization of
configuration files.
ALU-1>admin>redundancy# synchronize config
Syncing configuration......
Syncing configuration.....Completed.
ALU-1#
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