Meru Technical Note - Recovery Process for controller

Recovery Process for controller.

KB ARTICLE TYPE: Troubleshooting

RELATED PRODUCTS:  NA

RELATED SOFTWARE VERSIONS:  All versions

KEYWORDS: recovery

    
• Controller is unresponsive after downgrading the controller
    
• Showing error as WARNING /etc/init.d/wncagent: bin/wncagent did not start. Will try again
    
• It is not prompting for username and password
    
• Boot controller from Linux recovery, we do not see any Meru configuration files on the controller.

Solution:

    
• Boot the controller from Linux recovery and Proceeded with settings
    
• Assign a static IP and FTPd the meru-5.3-132-MC4200_recovery_root.img.gz

Procedure:

Select one of the following options:

1. Proceed with this setting
2. Use DHCP to get an IP address
3. Assign a static IP address

Please type [1-3]: 3

Please enter the IP configuration for this machine.
Each item should be entered as an IP version 4 style address in dotted-decimal
notation (for example, 10.20.30.40)

Enter IP address: 172.x.y.z
Is 172.x.y.z correct [y/n]:y

Enter netmask: 255.255.255.192
Is 255.255.255.192 correct [y/n]:y

Enter default gateway (IP): 172.x.r.s
Is 172.x.r.s correct [y/n]:y

You will now be placed in an FTP client. After you log in,

Enter FTP server IP address: x.x.x.x
Is x.x.x.x correct [y/n]:y
Connected to x.x.x.x (x.x.x.x).
220 3Com 3CDaemon FTP Server Version 2.0
Name (x.x.x.x:admin): admin
331 User name ok, need password
Password:
230 User logged in
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> get meru-5.3-132-MC4200_recovery_root.img.gz
local: meru-5.3-132-MC4200_recovery_root.img.gz remote: meru-5.3-132-MC4200_recovery_root.img.gz
227 Entering passive mode (x,x,x,x,8,108)
125 Using existing data connection
226 Closing data connection; File transfer successful.
178207510 bytes received in 74.3 secs (2.3e+03 Kbytes/sec)
ftp> bye
221 Service closing control connection
Verifying image integrity...
Recovery image was downloaded and uncompressed successfully.
Found a 2.6 kernel based root file system
Restoring root partition to /dev/sda6...
gunzip -c /tmp/meru-5.3-132-MC4200_recovery_root.img.gz | dd of=/dev/sda6 bs=1M >/dev/null
0+26776 records in
0+26776 records out
980532224 bytes (981 MB) copied, 106.499 seconds, 9.2 MB/s
Image successfully restored. Rebooting system.

Ran Setup and rebooted the controller. Controller upgraded on 5.3-132 code