User Manual

Appendix B - Software Upgrade Upgrading the AU
4Motion 853 System Manual
B.3 Upgrading the AU
To upgrade the AU software, first configure the TFTP server that you want to use
for software version download, and then download the image to the NPU flash.
You can store up to three images to be used for AU upgrade. You are required to
create a mapping between the AU slot and the image residing in the NPU flash.
Each time the AU is reset or if you are inserting/re-inserting the AU card in the
AU slot for, the AU boots up using the AU-to-image mapping that you specify.
You can specify separate AU-to-image mappings for each AU slot. In addition, you
are required to create a mapping that is to be used as the default mapping. This
default mapping is used for boot up all AU slots for which a mapping does not
exist. After you have created the mapping, download the mapped image from the
NPU flash to the AU flash (for the AU slot for which the mapping is created). You
can then reboot the AU using the downloaded image.
If the image that you have used to reboot the AU is not the image currently
mapped to this AU slot, the AU-to-image mapping for that AU slot is updated with
this image (provided you have not deleted this image from the NPU flash before
rebooting the AU).
B.3.1 Procedure for Upgrading the AU
 “Step 1: Configuring the TFTP Server” on page 854
 “Step 2: Downloading the AU Image to the NPU Flash” on page 855
 “Step 3: Creating the AU-to-Image Mapping” on page 856
IMPORTANT
Before inserting an AU card, ensure that an AU-to-image mapping exists, which is to be used for
booting the AU. If you insert the AU card when there is no existing mapping, the AU is immediately
shut down. For more information about creating a (default) AU-to-image mapping, refer “Step 3:
Creating the AU-to-Image Mapping” on page 856
.
After you create the AU-to-image mapping, execute the following command (for details refer
Section B.3.1.5).
npu(config)# reboot au [<au slot-id>] shadow [<shadow image name>]
After you execute this comamnd, the AU boots up with the mapped image.
To execute the AU upgrade procedure: