4 MAINTAINING S OFTWAREThis chapter covers the following topics:■ Upgrading Software■ Lost Passwords■ Using the BOOT MenuUpgrading Software The following sections describe how to upgrade software on your Switch 7750:■ Upgrading the Software Image■ Upgrading Software with FTP■ Upgrading Software Using The BOOT Menu■ Upgrading Software Using Xmodem■ Upgrading Software Using TFTP■ Upgrading Software in the Secondary Fabric of the 8-slot ChassisAlways save the configuration file before upgrading applications.Upgrading the SoftwareImageTo upgrade the software image of a Switch 7750, use one of the followingprocedures:■ “Upgrading Software with FTP” on page 55■ “Upgrading Software Using The BOOT Menu”page 56■ “Upgrading Software Using Xmodem” page 60■ “Upgrading Software Using TFTP” page 62Upgrading Softwarewith FTPUse the following procedure to upgrade software with FTP:1 Log in to the system with super-user privileges.2 From the SW7750 command line, transfer the file from the FTP server to thesystem, using the ftp command.3 Specify the file to boot the system from, using the boot command.4 Reboot the system, using the reboot command.The following example illustrates this procedure:suPassword:Now user privilege is 3 level, and just commands which level isequal to or less than this level can be used.