System settings Update system firmware
Digi TransPort WR Routers User Guide
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n Loss of internet connectivity while upgrading device.
This has no impact on the firmware update, because once the firmware image has been
downloaded, internet access is no longer required. The firmware update process will continue.
During the update process, the boot bit is toggled, and the new firmware image is loaded when
the device reboots.
n Unable to update firmware after download of new firmware.
If the new firmware image cannot be used to update the image (for example, if there is an
invalid signature due to a corrupted download), the update process will abort and the device
will continue to run the existing firmware image without rebooting. If the device is
subsequently rebooted, it will continue to use the existing firmware image.
n The device reboots or shuts down during the firmware update process.
The outcome of this varies, depending on the state of the update process when the power loss
or reboot occurred. There are two stages involved in writing the firmware image to flash
storage during the update process:
l Write the firmware image to flash storage.
l Toggle the boot bit to reflect which firmware bank to use when the device reboots.
If the device loses power or reboots when the firmware image is being written to flash, then
the boot bit has not yet been toggled. Therefore, the device will continue to use the existing
firmware image.
It is extremely unlikely that the device will lose power or reboot when updating the boot bit,
because it is single bit being changed. If the boot bit has not changed, then the device will
reboot using the existing image. If the boot bit has been changed, then the device will reboot
with the new firmware image.
How to recover a WR54, LR54, or LR54-FIPS that will not boot
This section describes the process for recovering a WR54, LR54, or LR54-FIPS device that cannot boot
because both firmware images stored in flash memory have become corrupted.
When a WR54/LR54/LR54-FIPS device is in this state, the device will continually reboot as it attempts
to boot one of the firmware images that are stored on the device. The LED state will be as follows:
WR54 LEDs LR54/LR54-FIPS LEDs State
Power Power Periodic blink as the device reboots
WWAN1 Signal WWAN Signal Off or Yellow or Green
WWAN1 Service WWAN Service Off or Green
WWAN2 Signal SIM1 Off or Green
WWAN2 Service SIM2 Off or Green
To recover the WR54/LR54/LR54-FIPS, you will need a TFTP server that has an IP address of
192.168.1.100. The WR54/LR54/LR54-FIPS will use an IP address of 192.168.1.1.
The recovery image is a fully functional release of the firmware; however, a newer firmware release
may be available. Once the device is recovered, you should update to the latest firmware release.
Any configuration on the WR54/LR54/LR54-FIPS will not be modified as part of the recovery process.
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