SR-series 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. You configure automatic synchronization for the BOF, boot.ldr, configuration, YANG schema, and image files or you can configure it for only the configuration files. Use the following commands to configure which types of changes cause automatic synchronization:
configure redundancy synchronize boot-env
configure redundancy synchronize configIf the schema YANG files are not found, the files are not copied but the rest of the synchronization is not affected.
Automatic synchronization also occurs whenever the BOF is modified and when you execute an admin save command with no file URL specified.
manually
You can manually synchronize the BOF, boot.ldr, configuration, YANG schema, and image files, only the configuration files, or the imported certificate/key/CRL files. Use the following commands to perform manual synchronization:admin redundancy synchronize boot-environment
admin redundancy synchronize configuration
admin redundancy synchronize certificateadmin redundancy synchronize boot-env
admin redundancy synchronize config
admin redundancy synchronize cert