Quidway AR 28 Series Routers Installation Manual.pdf - Index of

Installation ManualQuidway AR 28 Series RoutersChapter 6 Router MaintenanceEnter your choice(1-3):13) Select an application to boot the router.Routers with Flash over 8 MB provide dual image function. That is, the system definesthree application files for booting the router by default: main application file, backupapplication file, and secure application file. If you have downloaded these threeapplication files in Flash, the system will select one in sequence to boot the router. Ifyou wish to change the sequence or the boot file, you can make modification in theBoot ROM menu.The default names, types, and select sequence of main, backup, and secureapplication files are described as follows:• Main application file: default name main.bin, file type M. By default, the systemutilizes this file to boot the router.• Backup application file: default name backup.bin, file type B. The system utilizesthis file to boot the router if the main file fails.• Secure application file: default name secure.bin, file type S. The system utilizes itto boot the router if the backup file fails. The system prompts booting failure if thesecure application file fails. Note:• Only the application files of M, B, and S types can be used to boot the system. Applications of N/A type,that is, non M, B, or S type, cannot be used to boot the system.• The file names of the applications in Flash can be modified using commands after they are started.Refer to “System Management” for detailed commands. The file types of M, B, and N/A applicationscan be modified in Boot ROM menu, or by commands after the applications are started. Theapplications of S type do not allow modification in file type.• Secure application file is the last precaution against system booting failure; therefore, it does not allowmodification or adaptation from other files. You can only download it from Boot ROM and specify itsname as secure.bin. If you use the rename command to change the secure file name after the systemis booted, the file is removed from Flash and you need to download it again.• Only one M file, one B file, and one S file can exist in Flash. For example, if a file is both M file and B file,it is impossible to have another M file or B file in Flash. If the file type of another file is changed to B, thefile of both M and B must be changed to M file.The following menu is displayed if you select 3 in the Boot ROM menu. Suppose fourapplication files are stored in Flash, and their types are as shown below:M=MAIN B=BACKUP S=SECURE**************************************************************************NO. Name Size Type Time6-2