Maintenance and Troubleshooting 109
Software Release 2.6.1
C613-02039-00 REV A
When you start the switch the FLASH boot release is always loaded first. The
FLASH boot release contains all the code required to obtain and check the
INSTALL information. This first boot is known as the INSTALL boot. The
INSTALL information is inspected and the switch is setup to perform another
load. Even if the actual release required is the FLASH boot release, another
load is always performed. At this point, if a patch load is required, it is also
performed.
The switch startup occurs immediately after the install override option, or after
the INSTALL information check. The INSTALL information check performs a
full startup of switch software and initiates the normal operation of the switch.
Finally, if there is a defined boot script, this script is executed.
How to Avoid Problems
If you perform the following procedures you may help reduce the likelihood
and impact of some future switch events.

Set system territory

Set the system territory to the country or region in which the switch is
connected to the network. Some protocols are implemented in differently in
some countries. To ensure that the switch uses variants that will work in the
country your switch is routing in, enter the command:
SET SYSTEM TERRITORY={AUSTRALIA|CHINA|EUROPE|JAPAN|KOREA|
NEWZEALAND|USA}

Backup software files

Store a backup of the current switch software. If the switch software is
accidentally cleared from the router’s FLASH m emory, you will need to reload
the software release and patch files. If your access to the Internet is via the
switch, then you will need the files on your LAN. You may wish to keep a copy
of the current software and patch files on a TFTP server on your network. You
can download switch software from the support site at
http://www.alliedtelesyn.co.nz/support/ar400.

Backup configuration script

Store a backup of the latest configuration script, in case the configuration file
on the switch is accidentally deleted or damaged.
Table 22: Switch startup sequence keystrokes.
Pressing key... Forces the switch to...
Y Load the FLASH boot release, with no patch, and skip straight to step 6.
S Start with the default configuration. Any boot script or NVS
configuration is ignored.
N Configure from NVS, ignoring any boot script.
[Ctrl/D] Enter diagnostics mode.