AIS AI2524 user manual Setting the Boot Field

AI2524 Router Card User’s Manual

zWhen the entire boot field equals a value between 0-0-1-0 and

1-1-1-1, the router loads the system image specified by boot sys- tem commands in the startup configuration file. When the startup configuration file does not contain boot system commands, th router loads a default system image stored on a network server.

When loading a default system image from a network server, the router uses the configuration register settings to determine the default system image filename for booting from a network server. The router forms the default boot filename by starting with the word cisco and then appending the octal equivalent of the boot field number in th configuration register, followed by a hyphen (-) and the processor type name (cisconn-cpu). See the appropriate hardware installation guide for details on the configuration register and default filename.

Setting the Boot Field

You must correctly set the configuration register boot field to ensure that your router loads the operating system image as you intend. To set the boot field:

1.Obtain the current configuration register setting. This setting is hexadecimal value.

2.Modify the current configuration register setting to reflect the way you want to load a system image. To do so, change the least sig- nificant hexadecimal digit to:

0 to load the system image manually using the boot command in ROM monitor mode.

1 to load the system image from boot ROMs.

2 through F to load the system image from boot system com- mands in the startup configuration file or from a default system image stored on a network server.

For example, if the current configuration register setting is 0x101 and you want to load a system image from boot system commands in the startup configuration file, you would change the configuration register setting to 0x102.

1.Reboot the router to make your changes to the configuration reg- ister take effect.

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