System information

Configuring the Boot File Location
186 AlterPath OnBoard Administrator’s Guide
Specifying the Boot File Location
The “Unit boot from” pull-down menu lists the “Network” option for booting
from a TFTP boot server on the network along with one or two boot images
that reside on the OnBoard. Two options appear (“Network” and “Image1”),
as shown in the following figure, if only one boot image is found on the
OnBoard.
Figure 6-39:Settings → Boot Configuration → Unit Boot Menu
The default image stored on the OnBoard is shown in the example with the
name Image1:uImage.V_1.0.0a-Sep_20_05. A second image
appears in the list only if the software has been upgraded.
Local Boot Options
To understand the local options on the “Unit boot from” menu, you need to
understand how the OnBoard handles software upgrades:
• The OnBoard initially boots from a software image referred to as
“Image1.”
• The first time a new software version is downloaded and installed from
Cyclades, the new image is stored as “Image2” in the flash memory and
the configuration is changed so the OnBoard boots from “image 2.”
• The second time a new software version is downloaded and installed, the
latest image is stored as “Image 1,” and the OnBoard configuration is
changed to boot from “Image1.”
• Subsequent downloads are stored following the same pattern, alternating
“Image1” with “Image2.”
In the “Unit boot from” pull-down menu, the entry for the current boot image
is selected by default.