System Basics Introduction
Page 212 7210 SAS M, T, X, R6 Basic System Configuration Guide
Synchronization and Redundancy
7210 SAS-R6 routers supporting redundancy use a 1:1 redundancy scheme. Redundancy methods
facilitate system synchronization between the active and standby Control Processor Modules
(CPMs) so they maintain identical operational parameters to prevent inconsistencies in the event
of a CPM 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 CPM file system are
mirrored in the standby CPM file system.
Although software configurations and images can be copied or downloaded from remote locations,
synchronization can only occur locally between compact flash drives (cf1:, cf2:, and cf3:).
Synchronization can occur either:
• Automatically — Automatic synchronization is disabled by default. To enable automatic
synchronization, the config>redundancy>synchronization
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 and when an
admin>save
command is entered with no filename specified.
• Manually — To execute synchronization manually, the admin>redundancy>
synchronization
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.
A:ALA-12>admin>redundancy# synchronize config
Syncing configuration......
Syncing configuration.....Completed.
A:ALA-12#
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