Firmware recovery steps for Zyxel Access Points

Zyxel_Melen

INTRODUCTION

This FAQ describes how to upgrade firmware from tftp server by AT commands. In
rare situations, Zyxel Access Points might not boot up successfully after a firmware upgrade. The following procedures are the steps to recover firmware to normal condition.

ENVIRONMENT

Please connect the console cable to Zyxel Access Point and RJ-45 to tftp server.

RECOVER/UPGRADE FIRMWARE

1. Press any key to enter debug mode during the booting period.
   
2. Open the tftp server (192.168.1.103) and put the firmware (.bin file) in the current directory.
   
3. Please follow the procedures below to upgrade the firmware via tftp server (192.168.1.103).
   A. WAC6503D-S> atna 192.168.1.2
   B. WAC6503D-S> atns 192.168.1.103
   C. WAC6503D-S> atnz <your Zyxel Access Point's firmware file name>.bin
   
4. Use the Tftp client feature to download the file.
   
   Processing log:
   =====================================================================
   eth0 link down
   dup 1 speed 1000
   TFTP from server 192.168.1.103; our IP address is 192.168.1.2
   Filename '420AASF1C0.bin'.
   Load address: 0x80060000
   Loading:
   #################################################################
   
   #################################################################
   
   #################################################################
   
   #################################################################
   
   #################################################################
   
   #################################################################
   
   #################################################################
   
   #################################################################
   
   #################################################################
   ##################################################
   done
   Bytes transferred = 30540424 (1d20288 hex)
   tftp get file: 420AASF1C0.bin, size:1d20288
   420AASF1C0.bin: header_len = 652, 108, 272, 2
   0x1ae1 vs 0x1ce1
   0x1be1 vs 0x1ce1
   0x1ce1 vs 0x1ce1
   checksum = 4d59bf81, signature = deadbeaf
   total_len = 1d20288, version = 100
   max_model = 5, file_num = 2
   head_len(R) = 108, head_len = 108
   info_len(R) = 272, info_len = 272
   file_offset = 648
   model = 1ae1 1be1 1ce1 1de1 ffff
   capwap version = 1.00.02
   model_id = WAC6500
   0, kernelwac6500.bin, TYPE_KERNEL, kernel, 2.6.31, 2015-05-28 17:33:54,
   1179648 ,
   57951123, 190000
   1, jffs2_ro.img, TYPE_CODE, zldfs, 4.20(###.1), 2015-05-28 18:45:34, 29360128,
   322dae2f, 2b0000
   Un-Protected 1 sectors
   First 0xfb last 0xfb sector size 0x10000
   251
   Erased 1 sectors
   write addr: 9ffb0000
   Protected 1 sectors
   OK
   Firmware Upgrading.......
   Firmware Upgrade done.......
   WAC6503D-S>
   =====================================================================
5. Wait for about 3.0 minutes until finishing tftp download and flash programming.
   Use the atsr to reboot WAC6500.
   WAC6503D-S> atsr
   The username prompt displays after the WAC6500 starts up successfully