A transaction is an operation, in this case for configuration, that
either succeeds completely or not at all. It is explicitly opened
by an administrator and then committed or rolled back. Technical
problems such as a power loss counts as an implicit rollback.
When your device powers up, it loads and uses the last-committed
configuration. The power cycle therefore rolls back any configuration
changes that took place before the power was taken down.
When you press the RESET button for a few seconds, the same thing
is done. In addition to the power cycle procedure, a web interface
over which you can make configuration changes is opened. You have thus
begun a new transaction.
When you make configuration changes over the web interface, then these
are set immediately, in test mode. This means that you should do
whatever you can to assure that it works properly. If all works as
expected, you can press the COMMIT button to commit changes. When
the RESET button is pressed or when the power is cycled, this committed
state will be loaded.
Note that pressing RESET while configuration settings are under test
will erase those test settings, and revert to the last-committed
settings. This means that you can always use a hardware button if
you would ever lock yourself out.
It is not possible to commit a configuration that locks you out of the
administrator's web interface, simply because you would not be able to
configure your own device if you would do that.
The web-interface also presents a facility to return the device to
factory settings. If you cannot access the web interface anymore, you
can also remove the power and plug it back in while you keep the RESET
button pressed. Do not release the RESET button until you see the ACTIVE
light flashing fast.
Note that administrator's passwords are treated separately; when it is
changed, it is immediately stored. There is no way of resetting the
administrator's password to factory defaults. Be sure to remember your
administrator password.
Posted on Thu, 10 Feb 2005, 11:21.