Upgrade Software Packages

Each JUNOS software release consists of the following software packages:

• jkernel—Operating system package
• jbase—Additions to the operating system
• jroute—Software that runs on the Routing Engine
• jpfe—Software that runs on the Packet Forwarding Engine
• jdocs—Documentation for the software
• jcrypto—Encryption software (in domestic software only)

The JUNOS software contains two additional packages: jbundle and jinstall. These packages contain the complete JUNOS software.

• jinstall—A package used to upgrade from JUNOS Release 5.x to 6.x or when the software becomes damaged. If you upgrade from 5.x to 6.0 using jinstall, use jbundle for subsequent upgrades or downgrades. The jinstall package completely reinstalls the software. It rebuilds the JUNOS file system only, but retains configuration, log files, and similar information from the previous version. For more information about how to use jinstall when the software becomes damaged, see Reinstall Software Using jinstall.
• jbundle—A package used to downgrade from release 6.1. jbundle is also used to upgrade or downgrade between minor versions of the JUNOS software. jbundle modifies the smallest set of files needed to change to the new software version. For more information about how to upgrade from Release 5.x to 6.0 or downgrade from Release 6.0 to 5.x, see Upgrade to Release 6.0 or Downgrade from Release 6.0.
  

  NOTE: jbundle cannot be used to upgrade from JUNOS 5.x to JUNOS 6.0.

  
  

To determine which packages are running on the router and to get information about these packages, use the show version command at the top level of the command line interface (CLI).

This chapter discusses the following topics:

• Upgrade All Software Packages
• Upgrade Individual Software Packages
• Copy a Configuration to a PC Card or LS-120MB Floppy Disk