D-Link DI-1162 - Manual (Page 134)

DI-1162 Remote Access Router
124 PROM System Configuration
System Reset
The system reset function enables you to reset the DI-1162 without
powering off. Some settings changes require a system reset in order for
them to take effect.
A system reset will not affect the router’s settings, but will clear all
tables including the routing table and all SNMP counters and tables. It
is also used to initiate a software update.
Software Update
The Software Update option is used to change the software in the flash
memory of the router. This is the runtime software that is used to
configure the router and is described in full in the preceding chapter.
The runtime software should only be updated if you are encountering
problems with your current runtime software or you are certain your
runtime software is lacking functionality contained in a more recent
version.
Downloading new software will only replace the runtime software and
will not affect any configuration settings you have made. Upon running
the new software, the router will be configured exactly as you had it
before downloading the new software.
The runtime software (image file) must be stored on a TFTP server and
accessed via the LAN.