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How to recover AC & AP firmware under boot ?

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Post time 2021-4-30 16:57:28 | Show all posts |Read mode
The processing methods are different for different types of equipment:
1. AC&AP with console port
2. Wall ap
For AC&AP with console port, the guide for firmware recovery is shown as below:
I. Network Topology

图片1.png
                                                                                             

II. Requirements
1. Generally, we recover firmware under BOOT mode if we deletes firmware on Main Mode by mistake, firmware broken or any other unknown reasons that devices cannot boot up and enter Main Mode.
2. Finish reading Device Management --> System Management --> Firmware Upgrade, have knowledge of how to transfer firmware with TFTP server.
3. It's applicable for both AC and APs with console port. Not applicable for Wall APs without console port.
Note: remember to turn off Windows Defender protection and system firewall.
III. Configuration Steps
1. Assign IP address 192.168.110.2 to laptop, enable TFTP Server and also prepare the firmware, the firmware put on same folder with tftp server.

图片2.png

2. Console in device, restart devices,   press "CTRL + C"  when system prompts,  enter BOOT Mode, Input 0

图片3.png
3. Input 1, then upgrade firmware with the following steps.

图片4.png
4. Input "yes"  

图片5.png

5. Press "CTRL+Z" return to upper level, then choose "2" to run main

图片6.png

IV. Verification
Devices succeed to enter Main mode, execute command "show version", check the firmware version.
Ruijie#show version

图片7.png
For Wall AP, the guide for firmware recovery is shown as below:
I. Network Topology
图片8.png                                              
II. Requirements
1. Generally, we recover firmware under BOOT mode if we deletes firmware on Main Mode by mistake, firmware broken or any other unknown reasons that devices cannot boot up and enter Main Mode.
2. Finish reading Device Management --> System Management & --> Firmware Upgrade, have knowledge of how to transfer firmware with TFTP server.
        
III. Configuration Steps
1. Open Wireshark, load a packet capture process as below.  AP 192.168.64.64 lost firmware and is requesting 192.168.64.1 for firmware.

图片9.png

2. Assign IP address 192.168.64.1 to laptop, enable TFTP Server and also prepare the firmware, the firmware put on same folder with tftp server.

图片10.png

3. Edit a notepad name as "FileList.txt", put it in the same folder as shown above,   the content is the firmware name you're going to transfer.

图片11.png

4. AP will begin downloading firmware soon, verify by viewing TFTP Server connection status.
5. AP will reload when finish recovering firmware

IV. Verification
Login AP via telnet and AP is recovered.

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