Firmware recovery steps for Zyxel Access Points

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Zyxel_Melen
Zyxel_Melen Posts: 1,714  Zyxel Employee
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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

Zyxel Melen