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Chapter 12: Firmware Upgrade
173
To update Stacking Units for the Failsafe Upgrade feature
The major upgrade procedures may vary depending on the situation of
your devices. For example, if the boot loader version of your Main Unit is
already 0C4 and the firmware version is 3E5, you can skip STEP (A)
below.
STEP (A): Update the Main Unit's boot loader to 0C4 and
firmware to 3E5 or later
STEP (B): Keep only one Stacking Unit connected
STEP (C): Update the Stacking Unit's Firmware
STEP (A): Update the Main Unit's Boot Loader to 0C4 and Firmware to 3E5
or Later
There are two types of scenarios:
The boot loader version of the Main Unit is earlier than 0C4—you
must upgrade its boot loader to 0C4 or later. See Updating Main
Units for Failsafe Upgrade Feature in Main Units (on page 171)
for details
.
The boot loader version of the Main Unit is 0C4 or later, but its
firmware code is earlier than 3E5—download the firmware of version
4.2 or later, and upgrade it by following the procedure described in
General Update Procedure (on page 167). The firmware file to
c
h
oose is P2-xxx.hex (xxx represents the version).
STEP (B): Keep Only One Stacking Unit Connected
To upgrade the Stacking Unit for obtaining the failsafe capability, only
one unit is allowed to connect to the Main Unit at one time. If there are
more than one Stacking Unit or no Stacking Unit connected to the Main
Unit, you must do the following:
1. Turn off the Main and Stacking Units.
2. Connect only one Stacking Unit to the Main Unit.
3. Turn on the Stacking Unit first.
4. Turn on the Main Unit.
5. Set the Main Unit's stacking support to 1. See Stacking Support (on
page 42) for additional information.
6.
Set the Stacking Unit ID to 1. See step 6
of Installing a
P2-UMT1664S Stacking Unit (on page 30) for additional
information.
7. Turn off both
units.
8. Turn on the Stacking Unit first.
9. Turn on the Main Unit.