Alcatel-Lucent 7450 ESS-7 - Page 25

7450 ESS-7 Overview
7450 ESS-7 Page 25
S
YNCHRONIZATION IN REDUNDANT SYSTEMS
The 7450 ESS-7 switch is capable of a 1:1 Control Processor Module (CPM) redundancy scheme.
Redundancy methods facilitate system synchronization between the active and standby 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 operation
configured on the primary, secondary or tertiary locations 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>system>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 and when an
admin>save command is entered with no filename specified.
• Manually — To execute synchronization manually, the
admin>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.
For more information about redundancy and synchronization, refer to the 7450 ESS OS
System Guide.