Technical data

System Administration
303561-A Rev 00
8-9
Booting the Router
The Technician Interface provides the following commands for booting:
•The
boot
command warm-starts the entire system. Pressing the Reset button
on the front panel of the router initiates the same procedure.
You can override the default router software image and configuration by
specifying an alternative router software image and an alternative
configuration file when entering the
boot
command.
•The
reset
command warm-starts a single processor module or the entire
system with the router software image and configuration currently in use.
Resetting the entire system is equivalent to booting it.
•The
diags
command cold-starts a single processor module or the entire
system. The cold start consists of CPU, backbone, and link diagnostics, and a
reboot. If you do not enter a slot number, the system tests and reboots all slots.
How the Router Boots
This section describes how each processor module in the router obtains its router
software image and configuration when you do not override the default router
software image (for example, bn.exe) and configuration file (config).
You do not override these files when you
• Cycle the power on the router.
• Issue the
diags
command.
• Hot-swap a module.
• Issue the
reset
command.
• Issue the
boot
command without specifying defaults.
A cold start occurs when you cycle the power on the router or issue the Technician
Interface
diags
command. The processor module executes CPU and backbone
diagnostics, and if a link module is present, link diagnostics. When CPU and
backbone diagnostics terminate successfully, and link diagnostics terminate
(successfully or unsuccessfully), the processor module boots.