E400 Firmware 3.6-r16 could not be installed


it is not possible to deploy the new firmware 3.6-r16 to the E400 devices with Firmware 3.5.2-r4. If I try to upgrade by CnMaestro Cloud, the Deployment fails with the message dowload failed or upgrade cancled because the devices went offline.

If I try to download the firmware image and upgrade the device directly within his webinterface the follwing error text is generated an nothing happens.

Upgrade Status : <?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>413 - Request Entity Too Large</title> </head> <body> <h1>413 - Request Entity Too Large</h1> </body> </html>

Is there any known issue with that firmware. I have the problem with both of my devices.



Hi , 

 There is no  known upgrade issue till date .However we can help you with the issue you are facing .

Please delete cache on your browser and perform upgrade on your device directly once again . Still if you are facing issue,  please invite sandeshkumar.b@cambiumnetworks.com to access your account  , so that we can look into the issue 


I could fix the issue by power off the E400 devices. After the reboot the firmware could be successfully installed.