Upgrade the boot loader file using the command admin>update boot-loader source_url, where the source URL specifies the new boot.ldr filename and its location; for example, in the format cf3:\sub_directory\boot.ldr.
The file upgrade command takes several minutes to complete. Do not reset or power off the system, or insert or remove cards or modules, while the upgrade is in progress, as this could render the system inoperable.
On systems with redundant CSMs, the upgraded boot.ldr file can be copied to the secondary CSM by using the command admin>redundancy>synchronize boot-env.
See the latest 7705 SAR Software Release Notes, ‟Standard Software Upgrade Procedure” section, for complete instructions.