Problem Statement :

ePMP Force 300-13L/Force 300-25L have a single flash bank. There is a high probability that the flash bank can get corrupted when power to the radio is interrupted during a flash write, i.e. software upgrade. This is not an issue with the Sync radio since there are two flash banks in them – one active and the other inactive. The inactive bank will take over if the active bank is corrupted.

Solution:

It is possible to recover an ePMP radio’s corrupted flash.

To perform the recovery procedure, the following is needed:

ePMP Force 300-13L/Force 300-25L with corrupted flash, i.e. there was a power interruption during a software upgrade and the device is no longer accessible or boots up.

Laptop or PC with a 3rd party TFTP server (ex: Free TFTP server for Windows )

Recovery Procedure :

Connect the PC/Laptop to the ePMP radio.

The PC/Laptop must be deployed in the same network as the ePMP device.

TFTP Server IP address must be set to 192.168.1.10/255.255.255.0.

Get the ePMP Force 300-13L/Force 300-25L recovery image from Cambium Support Center ( openwrt-ar71xx-generic-uImage-initramfs-lzma.bin ).

Reboot the ePMP device.

After successful boot-up, the ePMP radio will perform the recovery procedure. The procedure will take approximately 5 minutes. Once done, Force 300-13L/300-25L will reboot automatically.

After boot-up, the radio will be accessible using default local IP of 192.168.0.2 or the fallback IP of 169.254.1.1.

IMPORTANT: Software Upgrade through the GUI must be performed one more time for successful recovery in order to reflash broken image.

NOTE : This recovery procedure will work in cases where the u-boot of the radio is intact. In rare cases where the u-boot may also be corrupted, recovery is not possible.

Get the ePMP Force 300-13L/Force 300-25L recovery image from Cambium Support Center ( openwrt-ar71xx-generic-uImage-initramfs-lzma.bin ).

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