Users Guide

336 Dell PowerConnect 55xx Systems User Guide
• If the auto process involved setting the IP address of the device from the
setup file, the auto process from the TFTP server can be triggered.
• If the USB drive contains a setup file, but that setup file does not include a
line that can be used for the current device, the DHCP client is able to
trigger the Auto-Update process from TFTP (because the USB process
never started at all).
Automatic DHCP IP Interface Assignment
The user can manually define a DHCP interface in the DHCP IPv4 page.
If the user does not do this, the switch automatically creates a DHCP
interface on the VLAN with the lowest VLAN ID that does not have an IP
address defined on it after boot if both of the following conditions are
fulfilled:
• There is no DHCP IP interface.
• There is a VLAN without an IP address.
Preparations for Using Auto Update/Configuration from a USB Drive
Before Auto-Update/Configuration from a USB drive can be performed, the
following steps must be performed:
1. Enable Auto-Update/Configuration in the Auto Update of
Configuration/Image File page.
2. (Optional) Create a line in the setup file for this device containing the
required options and load it on the USB key.
3. Load configuration/image files on the USB key as required.
4. Insert the USB key in the USB drive and reboot the device.
Performing Auto-Update from a USB Drive
When Auto-Update is initiated from a USB drive, the following steps are
performed:
1. Locate the correct setup file
— The USB drive is searched for a setup file.
One of the following can occur:
– Setup file is not found—The root folder of the USB is searched for an
image files (with
.ros extension).
• The image file with the most recent version is loaded into the
image file if the versions are different.