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This chapter explains the function and syntax of the booting commands. For more information about defaults and usage guidelines, see the corresponding chapter of the Cisco IOS Configuration Fundamentals Command Reference, Release 12.1.
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Note Commands in this chapter replaced by new commands continue to perform their normal functions in the current release, but they are no longer documented. Support for these commands will cease in a future release. Table 9 maps the old command to its replacement |
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| Old Command | New Command |
|---|---|
show boot | show bootvar |
Cisco platforms use one of three different Flash memory file system types. Some commands are supported on only one or two file system types. This chapter notes commands that are not supported on all file system types. See Table 10 to determine which Flash memory file system type your platform uses.
| Type | Platforms |
|---|---|
Class A | Cisco 7000 family, C12000, LightStream1010 |
Class B | Cisco 1003, Cisco 1004, Cisco 1005, Cisco 2500 series, Cisco 3600 series, Cisco 4000 series, Cisco AS5200 |
Class C | Cisco MC3810, disk0 of SC3640 |
Cisco 7000 series
boot flash-fs:[filename]
Cisco 1600 and Cisco 3600 series
boot [flash-fs:][partition-number:][filename]
Syntax Description
file-url URL of the image to boot. filename When used in conjunction with the ip-address argument, the filename argument is the name of the system image file to boot from a network server. The filename is case sensitive. When used in conjunction with the flash keyword, the filename argument is the name of the system image file to boot from Flash memory. On all platforms except the Cisco 1600 series, Cisco 3600 series, and Cisco 7000 family, the system obtains the image file from internal Flash memory. On the Cisco 1600 series, Cisco 3600 series and Cisco 7000 family, the flash-fs: argument specifies the Flash memory device from which to obtain the system image. See the flash-fs: argument later in this table for valid device values. The filename is case sensitive. Without filename, the first valid file in Flash memory is loaded. ip-address (Optional) IP address of the TFTP server on which the system image resides. If omitted, this value defaults to the IP broadcast address of 255.255.255.255. flash (Optional) Boots the router from Flash memory. flash-fs: (Optional) Specifying the Flash file system is optional for all platforms except the Cisco 7500 series. Possible file systems are: partition-number: (Optional) Boots the router from Flash memory with the optional filename of the image you want loaded from the specified Flash partition. If you do not specify a filename, the first valid file in the specified partition of Flash memory is loaded. This option is relevant to platforms such as the Cisco 2500 where Flash memory may be partitioned.
To specify the location of the boot image that ROM uses for booting, use the boot bootldr global configuration command. Use the no form of this command to remove this boot image specification.
boot bootldr file-url
Syntax Description
file-url URL of the boot image on a Flash file system.
To configure the filename that is used to boot a secondary bootstrap image, use the boot bootstrap global configuration command. Use the no form of this command to disable booting from a secondary bootstrap image.
boot bootstrap file-url
Syntax Description
file-url URL of the bootstrap image. flash Boots the router from Flash memory. filename (Optional with flash) Name of the system image to boot from a network server or from Flash memory. If you omit the filename when booting from Flash memory, the router uses the first system image stored in Flash memory. tftp (Optional) Boots the router from a system image stored on a TFTP server. ip-address (Optional) IP address of the TFTP server on which the system image resides. If omitted, this value defaults to the IP broadcast address of 255.255.255.255.
Syntax Description n
file-url URL of the system image to load at system startup. flash On all platforms except the Cisco 1600 series, Cisco 3600 series, and Cisco 7000 family, this keyword boots the router from internal Flash memory. If you omit all arguments that follow this keyword, the system searches internal Flash for the first bootable image. On the Cisco 1600 series, Cisco 3600 series, and Cisco 7000 family, this keyword boots the router from a Flash device, as specified by the device: argument. On the Cisco 1600 series and Cisco 3600 series, if you omit all optional arguments, the router searches internal Flash memory for the first bootable image. On the Cisco 7000 family, when you omit all arguments that follow this keyword, the system searches the PCMCIA slot 0 for the first bootable image. flash-fs: (Optional) Flash file system containing the system image to load at startup. The colon (:) is required. Valid file systems are as follows: partition-number: (Optional) Number of the Flash memory partition that contains the system image to boot, specified by the optional filename argument. If you do not specify a filename, the router loads the first valid file in the specified partition of Flash memory. This argument is only valid on routers which can be partitioned. filename (Optional when used with boot system flash) Name of the system image to load at startup. It is case sensitive. If you do not specify a filename, the router loads the first valid file in the specified Flash file system, the specified partition of Flash memory, or the default Flash file system if you also omit the flash-fs: argument. rom Boots the router from ROM. Do not use this keyword with the Cisco 3600 series or the Cisco 7000 family. rcp Boots the router from a system image stored on a network server using rcp. tftp Boots the router from a system image stored on a TFTP server. ftp Boots the router from a system image stored on an FTP server. ip-address (Optional) IP address of the server containing the system image file. If omitted, this value defaults to the IP broadcast address of 255.255.255.255.
To change the configuration register settings, use the config-register global configuration command.
config-register value
Syntax Description
value Hexadecimal or decimal value that represents the 16-bit configuration register value that you want to use the next time the router is restarted. The value range is from 0x0 to 0xFFFF (0 to 65535 in decimal).
To change the configuration register settings while in ROM Monitor mode, use the confreg ROM Monitor command.
confreg [value]
Syntax Description
value (Optional) Hexadecimal value that represents the 16-bit configuration register value that you want to use the next time the router is restarted. The value range is from 0x0 to 0xFFFF.
To return to EXEC mode from ROM monitor mode, use the continue ROM monitor command.
continueSyntax Description
This command has no arguments or keywords.
To list the value of the boot field (bits 0 to 3) in the configuration register, use the ROM Monitor o command. To reset the value of the boot field so that the router boots from ROM, use the ROM Monitor o/r command.
oSyntax Description
This command has no arguments or keywords.
To reload the operating system, use the reload EXEC command.
reload [text | in [hh:]mm [text] | at hh:mm [month day | day month] [text] | cancel]
Syntax Description
text (Optional) Reason for the reload, 1 to 255 characters long. in [hh:]mm (Optional) Schedule a reload of the software to take effect in the specified minutes or hours and minutes. The reload must take place within approximately 24 days. at hh:mm (Optional) Schedule a reload of the software to take place at the specified time (using a 24-hour clock). If you specify the month and day, the reload is scheduled to take place at the specified time and date. If you do not specify the month and day, the reload takes place at the specified time on the current day (if the specified time is later than the current time), or on the next day (if the specified time is earlier than the current time). Specifying 00:00 schedules the reload for midnight. The reload must take place within approximately 24 days. month (Optional) Name of the month, any number of characters in a unique string. day (Optional) Number of the day in the range 1 to 31. cancel (Optional) Cancel a scheduled reload.
The show bootvar command replaces the show boot command. See the show bootvar command in this chapter for more information.
To display the contents of the BOOT environment variable, the name of the configuration file pointed to by the CONFIG_FILE environment variable, the contents of the BOOTLDR environment variable, and the configuration register setting, use the show bootvar EXEC command.
show bootvarSyntax Description
This command has no arguments or keywords.
To display the reload status on the router, use the show reload EXEC command.
show reloadSyntax Description
This command has no arguments or keywords.
To display the configuration of the system hardware, the software version, the names and sources of configuration files, and the boot images, use the show version EXEC command.
show versionSyntax Description
This command has no arguments or keywords.
To turn on automatic synchronization of configuration files for a Cisco 7507 or Cisco 7513 router that is configured for High System Availability (HSA), use the slave auto-sync config global configuration command. To turn off automatic synchronization, use the no form of the command.
slave auto-sync configSyntax Description
This command has no arguments or keywords.
To specify the default slave Route Switch Processor card on a Cisco 7507 or Cisco 7513 router, use the slave default-slot global configuration command.
slave default-slot processor-slot-number
Syntax Description
processor-slot-number Number of processor slot that contains the default slave RSP. On the Cisco 7507, valid values are 2 or 3. On the Cisco 7513, valid values are 6 or 7. The default is the higher number processor slot.
To specify the image that the slave Route Switch Processor runs on a Cisco 7507 or Cisco 7513 router, use the slave image global configuration command.
slave image {system | file-url}
Syntax Description
system Loads the slave image that is bundled with the master system image. This is the default. file-url Loads the slave image from the specified file in a Flash file system. If you do not specify a filename, the first file on the specified Flash file system is the default file.
To force a reload of the image that the slave Route Switch Processor card is running on a Cisco 7507 or Cisco 7513 router, use the slave reload global configuration command.
slave reloadSyntax Description
This command has no arguments or keywords.
To manually synchronize configuration files on the master and slave Route Switch Processor cards of a Cisco 7507 or Cisco 7513 router, use the slave sync config privileged EXEC command.
slave sync configSyntax Description
This command has no arguments or keywords.
To enable access to the slave Route Switch Processor console, use the slave terminal global configuration command. The no form of this command disables access to the slave RSP console.
slave terminalSyntax Description
This command has no arguments or keywords.
Posted: Wed Jul 26 15:45:59 PDT 2000
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