NAT-MCH Users Manual Version 1.10

NAT-MCH – Users Manual
6 Updating the MCH firmware
Firmware updates are supplied to customers as a result of bug fixes or enhancements
implemented by N.A.T..
To execute a firmware update the binary image supplied by N.A.T. must be available on a
TFTP server within the customer’s network. The MCH must be connected to this network via
the management Ethernet port. A terminal must be connected to the console port.
To initiate a firmware update the normal bootstrapping process of the MCH must be stopped.
The MCH bootstrap process is executed in two phases: after power up an initial bootstrap
loader is started which than starts the final MCH application firmware image. The initial
bootloader can be kept off from entering the second phase by typing ‘x’ on the console
terminal during the initial bootstrap phase. When the bootloader is stopped you are in the
command line mode of the bootloader.
To run the firmware update enter at the command line prompt. You will
be asked for the path information of the new image in the form:
where as has to be given in the “dot” notation.
If the given information is correct, the new firmware image will be loaded and stored into the
onboard Flash device.
Warning: Do not power cycle the system during this process!
When programming was successful, power cycle the system to boot the new firmware.
Problem tracking: In most cases when the tftp download does not work, file protections on
the tftp server are not set correctly or firewalls prevent the MCH from downloading the
image.
If you encounter such a problem, please start investigations in these areas.
Version 1.10 © N.A.T. GmbH 28