Default Switch Boot Configuration; Setting The Configuration Register; Setting The Boot Field In The Configuration Register - Cisco WS-C2950SX-48-SI Configuration Manual

Default Switch Boot Configuration

If any specified file is not a valid configuration file, the entry is skipped and subsequent files are tried
until there are no additional images specified. If no valid configuration file is specified, the system
retains the last configuration stored in NVRAM. For more information about using configuration files,
see
Default Switch Boot Configuration
Table 32-1
Table 32-1 Default Switch Boot Configuration
Feature
Configuration register value
Boot method
ROM monitor console port baud rate
ignore-config parameter
BOOT environment variable
CONFIG_FILE environment variable
CONFIG_FILE recurrence configuration register parameter Nonrecurring
1. The ROM monitor console port baud rate is always 9600 baud.

Setting the Configuration Register

The following sections describe how to modify the configuration register.

Setting the Boot Field in the Configuration Register

You can determine the boot method the switch will use at the next startup by setting the boot field in the
configuration register. This command affects only the configuration register bits that control the boot
field and leaves the remaining bits unaltered.
The following boot methods are supported:
•
•
•
We recommend that you use only the rommon and system options to the set boot config-register boot
Note
command.
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
32-4
Chapter 35, "Working with Configuration Files."
shows the default switch boot configuration.
ROM monitor—Use the rommon keyword to keep the switch in ROM-monitor mode at startup.
Bootflash—Use the bootflash keyword to cause the switch to boot from the first image stored in the
onboard Flash memory.
System—Use the system keyword to boot from the image specified in the BOOT environment
variable (the default).
Chapter 32 Modifying the Switch Boot Configuration
Default Configuration
0x10f
System boots from the image specified
in the BOOT environment variable
1
9600 baud
Disabled
Empty
bootflash:switch.cfg
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Release 8.1
78-15486-01