9: Upgrading router firmware 
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© Virtual Access 2017 
GW1000 Series User Manual 
Issue: 1.9    Page 61 of 350 
Where the first argument ‘LIS-15.00.72.002.image’ in SCP is the source and the second 
argument ‘tmp/LIS-15.00.72.002.image’ is the destination path, ”root” is the username 
used to connect to x.x.x.x IP address. 
After you execute the above command you will be asked to provide a root password. 
At this stage the output shows the process of copying the software file into destination 
directory. 
root@192.168.100.1’s password: 
LIS-15.00.72.000.image     100%  6812KB  2.2MB/s   00:03 
 
Image verification before flashing 
To verify the integrity of the image, firmware version xx.yy.72.002 and later uses an 
image-check application.  
Note: it is the user’s responsibility to verify the image before starting to write image to 
flash process. 
To use the image-check on downloaded image, enter: 
image-check /tmp/LIS-15.00.72.002.image 
 
In the case of any image corruption, appropriate error message will be displayed: 
Error: no SquashFS filesystem after CRC'd section - data length 3  
Error: read failed, expected at least 3 more bytes 
or other. 
Note: Image is valid only if none of error message appears. This process is done 
automatically during Web UI firmware update. 
Flashing 
When downloaded firmware verification succeeds, the new image can be written to flash. 
To write the image into the alternative image, enter: 
mtd write LIS-15.00.72.002.image altimage  
Note: this is an example, substitute the correct file name. 
Flash verification after flashing 
After the write process has finished, you must complete post verification of the firmware.  
To verify the checksum of downloaded firmware, enter: 
va_image_csum.sh /tmp/LIS-15.00.72.002.image 
 
The checksum of the downloaded binary is shown: 
08761cd03e33c569873bcc24cf2b7389  7006920  LIS-15.00.72.002 This MD5