Asus RT-AC88U

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# Set a static IP of 192.168.1.5 (or similar IP address within your configured subnet) on the PC you are using to upgrade firmware. # Set a static IP of 192.168.1.5 (or similar IP address within your configured subnet) on the PC you are using to upgrade firmware.
 +# Connect PC to one of the router's LAN ports with an ethernet cable.
# Open a browser to http://192.168.1.1 (or whatever you've set your router IP to). # Open a browser to http://192.168.1.1 (or whatever you've set your router IP to).
# Go to ''Administration -> Firmware Upgrade'' tab. # Go to ''Administration -> Firmware Upgrade'' tab.

Revision as of 22:15, 25 May 2023

px200

Contents



Hardware Specifications

FCC ID: MSQ-RTGW00
Industry Canada ID: 3568A-RTGW00
CPU: Broadcom BCM4709C0 (1.4 GHz, 2 cores)
Flash / RAM: 128 / 512 MiB
Expansion IFs: 1 x USB 3.0, 1 x USB 2.0
JTAG: yes, 5-pin header, unpopulated
Serial: yes, 4-pin header, unpopulated, internal, 3.3V TTL
Wl1 Chip1: Broadcom BCM4366
Wl1 MIMO config: 4x4:4
Wl1 protocols: a/n/ac
Wl2 Chip1: Broadcom BCM4366
Wl2 MIMO config: 4x4:4
Wl2 protocols: b/g/n
ETH Chip1: Broadcom BCM4709C0
Switch: Realtek RTL8365MB
LAN / WAN ports: 8 / 1 (up to 1 Gb/s)

Build Size Limit

The linux mtd partition is 62.0 MB, however, the CFE limits flash size to ~27 MB.

35531: 28241920 (26.9336 MB)
35667: 28393472 (27.0781 MB)


MTD Boot Partitions

From dmesg output:

nflash: squash filesystem with lzma found at block 29
Creating 4 MTD partitions on "nflash":
0x000000000000-0x000000080000 : "boot"
0x000000080000-0x000000200000 : "nvram"
0x000000200000-0x000004000000 : "linux"
0x0000003b3e80-0x000004000000 : "rootfs"
[...]
Northstar brcmnand NAND Flash Controller driver, Version 0.1 (c) Broadcom Inc. 2012
NAND device: Manufacturer ID: 0xc8, Chip ID: 0xd1 (Unknown NAND 128MiB 3,3V 8-bit)
[...]
Creating 1 MTD partitions on "brcmnand":
0x000004000000-0x000008000000 : "brcmnand"


Installation

Initial Flash

Prerequisites

  1. Download the asus_rt-ac88u-firmware.trx file from the asus-rt-ac88u folder.
    • NOTE: You may optionally use the asus_rt-ac88u-firmware.trx file from the experimental_driver folder under the asus-rt-ac88u folder.
    • See here for more info.
  2. Download and Install the ASUS Firmware Restoration Tool version 2.1.0.3 from the Asus Support Website (direct link)
    • Optional: Download abnd Install the ASUS Device Discovery Tool version 1.4.8.3 to discover the IP of your router if unknown (direct link)

Procedure

NOTE: The ASUS Firmware Restoration Tool is the preferred / recommended method for initial flash. The other procedures are provided as alternatives.

Using The ASUS Firmware Restoration Tool

  1. Set a static IP of 192.168.10 with subnet mask of /24 (255.255.255.0) on the PC you are using to flash the router.
  2. Place the router in Rescue Mode:
    1. Unplug the router's power cord (you may try waiting a minute if it doesn't go into recovery mode).
    2. Press and hold the reset button (there is an ongoing discussion on whether it's the WPS or reset button, try both).
    3. Keep long pressing the Reset button and plug the cord to DC IN at the same time.
      • Notice: Please DO NOT release the Reset button until the Rescue Mode is enabled.
      • The router turns to the Rescue mode when you see the power indicator light is slowly flashing.
  3. Click Start > ASUS Utility > Firmware Restoration
  4. Click Browse and choose the asus_rt-ac88u-firmware.trx file you downloaded previously.
  5. After choosing the file, click Open.
  6. Click Upload and then wait for around 1 min (or more, see indication of completion).
    • Notice: Before uploading the file, please make sure that you already turn your router to the Rescue Mode.
    • Otherwise you can't use Firmware Restoration to do the firmware update.
    • Steady power light indicates the setting procedure of Rescue Mode has been completed successfully.
  7. Wait for the router to reboot and then click Close.
  8. Return your PC to default auto-dhcp settings.
  9. Open a browser and go to http://192.168.1.1 where you should be greeted by the password change page of the DD-WRT webUI.
  10. Set username and/or password, then continue configuring to your preferences.
    • NOTE: You will need to enter user/pass to navigate away from the information page after setting them.


Using the ASUS Mini CFE web server

  • Similar to above, but using a web browser instead of the ASUS Firmware Restoration Tool

Manually via AsusWRT WebUI

Upgrading DD-WRT

Prerequisites

  1. Download the asus_rt-ac88u-firmware.trx file from the asus-rt-ac88u folder.
    • NOTE: You may optionally use the asus_rt-ac88u-firmware.trx file from the experimental_driver folder under the asus-rt-ac88u folder.
    • See here for more info.

Procedure

  1. Set a static IP of 192.168.1.5 (or similar IP address within your configured subnet) on the PC you are using to upgrade firmware.
  2. Connect PC to one of the router's LAN ports with an ethernet cable.
  3. Open a browser to http://192.168.1.1 (or whatever you've set your router IP to).
  4. Go to Administration -> Firmware Upgrade tab.
  5. Click on "Browse", locate and select previously downloaded asus_rt-ac88u-firmware.trx file.
  6. Click on the "Upgrade" button.
    • Please allow up to 10 minutes for the firmware upgrade process to complete. Do not disconnect your PC or power cycle your router during this process.
  7. Once the router has rebooted, click on "Continue" (if the Setup -> Basic Setup tab has not returned automatically) or point
    your browser to http://192.168.1.1 if you end up with a "Connection reset or other navigation error page in your browser.
  8. At this point, check in the webUI that the version of DD-WRT is the version you intended to upgrade to.
    • Please report in the Broadcom sub-forum successful flash reports or any other issues in the appropriate build thread for your firmware version.

Recovery

  • Use the Asus Firmware Restoration tool or mini CFE webserver method to recover a bricked device using either AsusWRT or a known good DD-WRT firmware image.

Notes

Also refer to the Asus guides Category at the bottom.
Router model thread: Asus RT-AC88U AC3100
asus rt-88u bricked, help needed