Cisco Systems 12010, 12810, 12410 manual Setting Software Configuration Settings, Boot Field

Chapter 4 System Startup and Basic System Configuration

Configuring the Software Configuration Register

The boot field (Table 4-5) defines a source for booting a default Cisco IOS software image required to run the router. The content of the boot field is specified as a binary number.

Table 4-5 Boot Field—Software Configuration Register

Boot Field Meaning at Power-On

00The system remains at the ROM monitor prompt (rommon>), awaiting a user command to boot the system manually.

01The system automatically boots the first system image found in the onboard flash memory SIMM on the RP.

02 to 0F	The system boots automatically from a default Cisco IOS
	software image stored on a TFTP server in the network. This boot
	field setting requires that the Ethernet port on the RP is
	configured and operational. This setting also enables boot system
	commands that override the default filename.

Note A Cisco 12010, Cisco 12410, or Cisco 12810 router is shipped with a boot image in the boot flash, and a Cisco IOS image on a flash memory card.

Setting Software Configuration Settings

The four low-order bits of the software configuration register (bits 3, 2, 1, and 0) form a boot field that defines the source of a Cisco IOS software image for booting the router.

You can set or change the contents of the boot field by entering the config-registercommand at the global configuration mode prompt [Milo(config)#].

Note The factory default configuration register setting for an RP is 0x0102.

	Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
OL-11496-01		4-33