Manual

10. Emergency Firmware Recovery

131 AirLive WHA-5500CPE-NT User’s Manual

The WHA-5500CPE-NT features an Emergency Recovery function in the bootloader to

recovery the AP in case of a firmware crashed. When you can’t access the

WHA-5500CPE-NT, please first try to repower the CPE or restore the settings to default.

You should find the CPE at 192.168.1.1.

If it still can not solve the problem, you can try to recover the CPE using the method

described in this chapter. Do not power off the WHA-5500CPE-NT or your PC during

process. Please read through this chapter carefully before attempting to perform the

upgrade. If the WHA-5500CPE-NT is damaged by improper use of this procedure, it will

void your warranty. It is recommended to have your dealer or distributor performing this

procedure.

10.1 How Emergency Upgrade Works

The WHA-5500CPE-NT’s flash memory is divided into “firmware” and “bootloader” area.

The bootloader area will check if the AP’s firmware is crashed at each bootup. If it detects

the firmware is crashed, the AP will try to download the firmware file “zImage” from remote

TFTP server(with IP address 192.168.1.254) automatically. Therefore, you must prepare

a PC with TFTP server software before performing the upgrade procedure.

10.2 Emergency Upgrade Procedure

1. Set your PC’s IP address to 192.168.1.254 and connect your PC directly to the

WHA-5500CPE-NT.

10. Emergency Firmware

Recovery