Performing Other Configuration Tasks
Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
4-40
If you set the boot field value to 0x2 through 0xF and a valid boot system command is
stored in the configuration file, the system boots the Cisco IOS software image as directed
by that value. If no boot system command is present in the configuration file, the system
computes a default boot filename for booting from a network TFTP server.
In the following example, the software configuration register has been set to boot the
system from the Flash memory SIMM on the RP and to ignore the Break function at the
next reboot of the router:
Router# conf term
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# config-register 0x0102
Router(config)# boot system flash [filename]
Ctrl-z
Router#
With the configuration register thus set to “0x0102,” the system computes a default boot
filename. In forming this filename, the system starts with cisco and appends the octal
equivalent of the boot field number, a hyphen, and the processor type (grp or prp).
Table4-5 lists the range of possible computed default filenames for booting over the
network. Note, however, that a valid boot system configuration command stored in the
NVRAM configuration file overrides any computed default filename for booting over the
network.