Cisco WS-SUP32-GE-3B Software Configuration Guide - Page 68

Modifying the Supervisor Engine Startup Configuration Chapter 3 Configuring the Switch for the First Time You can enter the boot command only, or enter the command and include additional boot instructions, such as the name of a file stored in flash memory, or a file that you specify for booting from a network server. If you use the boot command without specifying a file or any other boot instructions, the system boots from the default flash image (the first image in onboard flash memory). Otherwise, you can instruct the system to boot from a specific flash image (using the boot system flash filename command). You can also use the boot command to boot images stored in the Flash PC cards located in Flash PC card slot 0 or slot 1 on the supervisor engine. If you set the boot field to any bit pattern other than 0 or 1, the system uses the resulting number to form a filename for booting over the network. You must set the boot field for the boot functions you require. Modifying the Boot Field You modify the boot field from the software configuration register. To modify the software configuration register boot field, perform this task: Step 1 Step 2 Step 3 Command Router# show version Router# configure terminal Router(config)# config-register value Step 4 Router(config)# end Step 5 Router# reload Purpose Determines the current configuration register setting. Enters configuration mode, selecting the terminal option. Modifies the existing configuration register setting to reflect the way in which you want the switch to load a system image. Exits configuration mode. Reboots to make your changes take effect. To modify the configuration register while the switch is running Cisco IOS, follow these steps: Step 1 Step 2 Step 3 Step 4 Step 5 Enter the enable command and your password to enter privileged level as follows: Router> enable Password: Router# Enter the configure terminal command at the EXEC mode prompt (#) as follows: Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)# Configure the configuration register to0x2102 as follows: Router(config)# config-register 0x2102 Set the contents of the configuration register by entering the config-register value configuration command, where value is a hexadecimal number preceded by 0x (see Table 3-2 on page 3-21). Enter the end command to exit configuration mode. The new value settings are saved to memory; however, the new settings do not take effect until the system software is reloaded by rebooting the system. Enter the show version EXEC command to display the configuration register value currently in effect and that will be used at the next reload. The value is displayed on the last line of the screen display, as in this example: 3-22 Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY OL-11439-03