boot [ backup ] subsystem subsysName relFileName
no boot [ backup ] subsystem [ subsysName ]
Command introduced before JUNOSe Release 7.1.0.
Configures the selected subsystem to use the specified release the next time the subsystem is booted. The no version disables the subsystem. The backup option enables you to specify a backup release for the module in the specified slot in case the module reboots more times than allowed within the period specified by the boot revert-tolerance command.
Global Configuration