102 CHAPTER 11: S OFTWARE UPGRADE AND INSTALLATION7 The software upgrade may take several minutes to complete. TheSoftware Upgrade Successful screen is displayed when the softwareupgrade has been successful.8 Click OK to exit the Upgrade Software wizard and reboot the Webcache.This will complete the software upgrade. The Device View is displayed inthe Web interface.What is a SoftwareInstallation?You can install an older version of management software on theWebcache than the version that is currently running. This is useful in theunlikely event that you are experiencing problems following a softwareupgrade of the Webcache. A software installation should only beperformed as an emergency recovery procedure.3Com recommends that you always run the latest software version onthe Webcache.CAUTION: Unlike a software upgrade, all of the Webcache’sconfiguration settings are lost after a software installation has beencompleted; the Webcache is reset to its factory defaults. For moreinformation, see “Default Settings” on page 22. To restore the settingsafter the installation is complete, you must restore a system configurationfile that you have previously saved. This configuration file must have beensaved on the same software version as the software that you have justinstalled. For more information, see “Saving and RestoringConfigurations” on page 103.UnsuccessfulSoftwareInstallationsThe Webcache software installation process is robust and guards againstan installation failure. Should a software installation fail, the Webcachewill automatically revert to using the software version that was installedbefore the installation was started. The installation process is resilient topower failure, network failure or system failure.Performing aSoftwareInstallationTo install an older version of management software using the Webinterface:1 Log in to the Web interface.2 Click Device View on the Toolbar.
