Configuring the Switch for the First Time
Flash Memory Features
The Flash memory components allow you to do the following:
The Flash memory components support the following security features:
Flash Memory Configuration Process
To configure your switch to boot from Flash memory, follow these steps:
Copy a system image to Flash memory using TFTP or rcp (refer to the Cisco IOS Configuration
Fundamentals Configuration Guide, Release 12.1, "Cisco IOS File Management," "Loading and
Maintaining System Images," at this URL:
Configure the system to boot automatically from the file in Flash memory. You might need to change the
configuration register value. See the
Save your configurations.
Power cycle and reboot your system to ensure that all is working as expected.
BOOTLDR Environment Variable
The BOOTLDR environment specifies the Flash file system and filename containing the boot loader
With a Supervisor Engine 1 and MSFC1, do not erase the boot loader image from the MSFC1 bootflash:
device. The boot loader must be present in the MSFC1 bootflash: device to boot a Supervisor Engine 1
and MSFC1 successfully.
Copy the system image to Flash memory using TFTP.
Copy the system image to Flash memory using rcp.
Boot the system from Flash memory either automatically or manually.
Copy the Flash memory image to a network server using TFTP or rcp.
Boot manually or automatically from a system software image stored in Flash memory.
Flash memory cards contain a write-protect switch that you can use to protect data. You must set the
switch to unprotected to write data to the Flash PC card.
The system image stored in Flash memory can be changed only from privileged EXEC level on the
3-22, for more information on modifying the configuration register.
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
Modifying the Supervisor Engine Startup Configuration
"Modifying the Boot Field and Using the boot Command" section