AIS Router AI2524 - Manual (Page 115)

Chapter 7: Manually Loading System Images
August 1997 Page 7-15
2524UM
In this example, the software is configured from the file tokyo-config
at IP address 131.108.2.155:
Router1# copy tftp running-config
Host or network configuration file [host]?
IP address of remote host [255.255.255.255]? 131.108.2.155
Name of configuration file [tokyo-confg]?
Configure using tokyo-confg from 131.108.2.155? [confirm] y
Booting tokyo-confg from 131.108.2.155:!!!
[OK - 874/16000 bytes]
Copy a Configuration File Directly to the Startup
Configuration
You can copy a configuration file directly to your startup configura-
tion without affecting the running configuration. This task loads a con-
figuration file directly into NVRAM in a location specified by th
CONFIG_FILE environment variable.
To copy a configuration file directly to the startup configuration, type
this command in EXEC mode:
copy tftp startup-config
Modify the Configuration Register Boot Field
The configuration register boot field determines whether the router
loads an operating system image and, if so, where it obtains this sys-
tem image. The next sections describe the process for using the con-
figuration register boot field, your process for setting this field, and the
tasks you must perform to modify the configuration register boot field.
How the Router Uses the Boot Field
The lowest four bits of the 16-bit configuration register (bits 3, 2, 1,
and 0) form the boot field. These boot field values determine whether
the router loads an operating system and where it obtains the system
image:
z When the entire boot field equals 0-0-0-0, the router does not load
a system image. Instead, it enters ROM monitor or "maintenance"
mode from which you can enter ROM monitor commands to man-
ually load a system image.
z When the entire boot field equals 0-0-0-1, the router loads the sys-
tem image found in boot ROMs.