Upgrading Device Software; Device Software Overview - 3Com 4510G Configuration Manual

After the specified automatic execution time is reached, the system executes the specified
command in the background without displaying any information except system information such
as log, trap and debug.
The system does not require any interactive information when it is executing the specified
command. If there is information for you to confirm, the system automatically inputs Y or Yes; if
characters need to be input, the system automatically inputs a default character string, or inputs
an empty character string when there is no default character string.
For the commands used to switch user interfaces, such as telnet, ftp, and ssh2, the commands
used to switch views, such as system-view, quit, and the commands used to modify status of a
user that is executing commands, such as super, the operation interface, command view and
status of the current user are not changed after the automatic execution function is performed.
If the system time is modified after the automatic execution function is configured, the scheduled
automatic execution configuration turns invalid automatically.
Only the last configuration takes effect if you execute the schedule job command repeatedly.
After you configure this feature on the master, the configuration is not backed up to the slaves;
after the change of the master, this configuration will be ineffective.

Upgrading Device Software

Device Software Overview

Device software consists of the Boot ROM program and the system boot file. After the device is
powered on, the device runs the Boot ROM program, initializes the hardware, and displays the
hardware information. Then the device runs the boot file. The boot file provides drivers and adaption
for hardware, and implements service features. The Boot ROM program and system boot file are
required for the startup and running of a device.
Figure 10-1 Relationship between the Boot ROM program and the system boot file
Start
Boot ROM runs
Press Ctrl+B
No
Run boot file
Enter CLI
Finish
Select the Reboot option
to reboot the device
Enter Boot ROM
Yes
menu to upgrade the
Boot ROM program
or boot File
10-4
Figure 10-1 illustrates their relationship.