HP AdvanceStack Internet Router manual Virtual Configuration Register Bit Meanings

Troubleshooting

Virtual Configuration Register Settings

6.Reboot the router. The new value takes effect. Configuration register changes take effect only when the router restarts, which occurs when you switch the power OFF and ON or when you enter the reload command.

Virtual Configuration Register Bit Meanings

The lowest four bits of the virtual configuration register (bits 3, 2, 1, and 0) form the boot field. (See table 4-4.) The boot field specifies a number in binary form. If you set the boot field value to 0, you must boot the operating system manually by entering the b command at the bootstrap prompt, as follows:

>b [tftp] flash filename

The b command options are as follows:

■b—Boots the default system software from ROM

■b flash—Boots the first file in Flash memory

■b filename [host]—Boots from the network using a TFTP server

■b flash [filename]—Boots the file filename from Flash memory

For more information about the command b [tftp] flash filename, refer to the Cisco IOS configuration guide and command reference publications.

If you set the boot field value to a value of 0x2 to 0xF, and a valid system boot command is stored in the configuration file, the router boots the system software as directed by that value. If you set the boot field to any other bit pattern, the router uses the resulting number to form a default boot filename for booting from the network using a TFTP server. (See table 4-5.)

Maintenance

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