Notice:

Upgrade the latest firmware if your IR900 product current
firmware version equals or is lower than r8968, otherwise which maybe causes
unexpect restart or another unstable symptom.

Preparation：

Save running configuration and export it.

Go to Administration >> Config Management, click the
button of Backup running-config, and you will get a backup file, save it to suitable
location.

Reset the device

Go to Administration >> Config Management, click the
button of Restore default configuration.

Check IR900 firmware version

Go to Administration >> System to check the current FW version.

Upgrading:

Step 1

Upgrade directly to a transitional version

?click me to learn how to upgrade the firmware

Step2

Upgrade the latest version using .pkg firmware files package

The upgrade method is the same as step 1, the only difference is
that the uploaded file is a .pkg package

Firmware download:

Transitional version(r20030)

Latest version(r20039 so far)

Import the running-config just saved

Go to Administration >> Config Management, click Browse to

select the config file just saved, click Import to let the original
configuration take effect：